I want your spool data!
 

If some of you remember this thread: https://www.miataturbo.net/forum/sho...ighlight=spool

we started collecting spool-up rates of various turbo setups and threw them into a chart.


I would like to collect new data and try again.

So please respond using the follow example:

Engine: '93 1/6L
Turbo: T3 Super 60 .48 A/R
Manifold: BEGi Cast "Directed Pulse"
Downpipe Size/Style: Single tube 2.5" to 2.75"
Exhaust Size: 2.75" to 3"
Exhaust Components: Louvered resonator & Magnaflow Muffler
Intercooler Core Size: 18"x12"x3"
Intake Manifold: Stock
Headwork: Mild Porting, deshrouding, blended bowl
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Toyota COPs
Trans & Rear End Ratio: 5-speed, 4.1 LSD
Rear tire size: 205/45-16

FOURTH GEAR PULL:

RPM Boost(psi)
2250 1.88
2300 2.46
2400 2.9
2500 3.48
2600 3.77
2700 4.5
2800 5.65
2900 6
3000 7.25
3100 8.1
3200 9.57
3300 10.7
3400 11.75
3500 12.2
3600 13.5
3700 14



Leave it on topic, or posts will get deleted. Try to take the log in 4th gear to keep things constant, and start the pull from 2K. Have fun, don't need to keep pulling to 7K and go +100mph ;)

Engine: '01 1.8L
Turbo: GT2876R .64 A/R turbine housing
Manifold: ETD long tube mild steel
Downpipe Size/Style: 2.25 to 3" transition with external wg
Exhaust Size: 3"
Exhaust Components: cat, resonator, magnaflow big muff.
Intercooler Core Size: Begi #2
Intake Manifold: Stock
Headwork: zip
Engine Management: hydra
Other Spoolin' Helpers/Hurters: Toyota COPs, intake valve advanced 6degrees, super light flywheel/clutch.

FOURTH GEAR PULL:

RPM PSI
2300 0.0
2350 0.6
2400 0.9
2500 1.2
2550 1.6
2700 2.2
2800 2.5
2850 2.8
3050 3.4
3100 3.7
3150 4.1
3200 4.4
3250 4.7
3350 5.6
3400 5.9
3450 6.6
3500 7.2
3550 7.8
3600 8.1
3650 8.7
3700 9.0
3750 9.4
4000 9.7
4050 9.7
4100 9.7
4150 9.7

Engine: '99 1.8L
Turbo: Garrett GT2560
Manifold: BEGI cast, directed pulse
Downpipe Size/Style: BEGI stainless single tube
Exhaust Size: 2.5"
Exhaust Components: All Magnaflow: metallic high flow cat, resonator, muffler (stealthy)
Intercooler Core Size: 12"x12"x4"
Intake Manifold: stock
Headwork: none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters:Megasquirt controlled EBC with GM valve, 2.5"-3" IC plumbing over-the-top
Atmosphere ~98 KPa

FOURTH GEAR PULL:
RPM Boost (psi)
1717 0.45
1801 1.19
1915 1.63
2004 2.08
2203 3.12
2426 4.75
2616 6.24
2816 7.42
3004 8.61
3198 8.17
3407 8.32
3611 8.32
3795 8.32
4018 9.06
4233 8.61
4444 9.35
4609 8.76
4805 9.35
5007 8.76
5241 9.06
5409 8.76
5598 8.76
5818 8.76
6022 8.61
6284 8.76
6310 8.76

EDIT: I logged a 4th gear pull on the way home today just for this thread. The data above has been updated accordingly.

Engine: '94 1.8 liter, OEM 150k longblock
Turbo: GT2554R
Manifold: BEGi Cast "Directed Pulse" (standard S2/S3) with EGR
Downpipe Size/Style: BEGI 3" SSSG
Exhaust Size: 3"
Exhaust Components: BEGi DP, custom 3" midpipe with metal-core 3" cat, 3" Enthuza catback
Intercooler Core Size: 27x6.5x2.5"
Intake Manifold: Stock
Headwork: OEM
Engine Management: MSPNP
Other Spoolin' Helpers/Hurters: Toyota COPs, MS EBC

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Boost(psi)
1750rpm: 1.0psi
1870rpm: 2.1psi
2014rpm: 3.3psi
2478rpm: 5.4psi
2626rpm: 6.1psi
2783rpm: 7.3psi
3004rpm: 9.4psi
3188rpm: 11.0psi
3394rpm: 12.5psi
3601rpm: 14.1psi


Specify what tranny/rear end you have as well. My 5th gear and everyone else's 4th gear is the same.

Engine: '94 1/8L
Turbo: GT2860rs
Manifold: BEGi S4 stainless tubular
Downpipe Size/Style: BEGI divorced
Exhaust Size: 2.5"Exhaust Components: Magnaflow Muffler, metal cat
Intercooler Core Size: 18"x8"x3"
Intake Manifold: Stock
Headwork: none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Toyota COPs

3rd GEAR PULL:

RPM Boost(psi)
3300 = 1psi
3450 = 2psi
3487 = 3psi
3495= 4psi
3520 = 5psi
3550= 6psi
3620= 7psi
3640= 8psi
3660= 9psi
3700= 10psi
3780= 11psi Limit

Total elapsed time 1.36 seconds in 3rd gear. Taken from track day datalog. Was best full throttle example from a low rpm I could find. Makes boost earlier on other logs but this was the cleanest example.

Engine: '92 1.6L
Turbo: TD04L-13T from 06 Subaru WRX
Manifold: ETD long tube mild steel
Downpipe Size/Style: 2.25"
Exhaust Size: 2.25"
Exhaust Components: 2.25" flex joint with one 2.00" crush bend radius, 18" straight-through resonator and dual-chamber muffler
Intercooler Core Size: I dunno, its a 1st gen. Ford Probe turbo with 1.75" in/out; probably 12"x8"x2"
Intake Manifold: Stock
Headwork: Stock
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Nothing
Rear End Ratio: 4.3
Rear tire size: 205/50-15

FOURTH GEAR PULL:

RPM PSI
1500 1.1
1700 1.3
2000 2.0
2200 2.6
2500 4.8
2700 9.4
3000 10.0
3500 10.1
5000 Clutch Slip
6000 Clutch Slip
6500 Clutch Slip
7000 Clutch Slip

Nice. I was the last post and was never included. ::sniffle-sniffle::

Engine: '94 1.8L
Turbo: two Garrett GT1548
Manifold: Shore Motorsports Absurdflow TT muhahaha
Downpipe Size/Style: 2x 2.25" upper's blended into single 3"
Exhaust Size: 3" Absurdflow Stainless
Exhaust Components: 3" Magnaflow cat and 5x8x18 Magnaflow muffler
Intercooler Core Size: 18"x12"x3" side entry tube/fin ebay special
Intercooler Plumbing Size: 2.5" Stainless
Intake Manifold: Custom rotated plentium for thru-fender I/C plumbing welded onto stock lower half of intake manifold
Headwork: stock '94
Engine Management: AEM EMS
Other Spoolin' Helpers/Hurters: ?
Trans & Rear End Ratio: '92 5-speed, 3.9 torsen
Rear tire size: 205/45-16

FOURTH GEAR PULL:

RPM Boost(psi)
2000 0.0
2200 1.0
2500 2.0
2750 3.0
2950 4.0
3050 5.0
3200 6.0
3325 7.0
3425 8.0
3525 9.0
3625 10.0
3750 11.0
3850 12.0
3950 13.0
4000 13.3

269rwhp @ that 13 psi

Engine: '93 1.6L
Turbo: Mitsu small 16g
Manifold: Bottom-mount mild steel
Downpipe Size/Style: Single tube 3"" to 2.5"
Exhaust Size: 2.25"
Exhaust Components: Magnaflow 2.25" "high flow" ceramic cat, ebay cat-back with glass-pack and resonator
Intercooler Core Size: 9"x7"x2.5"
Intake Manifold: Stock
Headwork: none
Engine Management: Megasquirt PNP
Other Spoolin' Helpers/Hurters: MS controlled EBC, Fidanza flywheel
FOURTH GEAR PULL:

RPM Boost(psi)
2200 0
2300 1
2600 2
2850 3
3000 4
3200 5
3300 6
3500 7
3600 8
3700 9

Engine: '01 1.8L
Turbo: Precision SC61
Manifold: Tubular
Downpipe Size/Style: 3"
Exhaust Size: 3"
Exhaust Components: 3" w/ catalytic converter
Intercooler Core Size: 24"x8"x3.5"
Intake Manifold: Stock
Headwork: none
Engine Management: Hydra
Other Spoolin' Helpers/Hurters: FM Base map w/no tuning
FOURTH GEAR PULL:

RPM Boost(psi)
2000 0.0
2250 0.3
2500 0.9
2750 1.2
3000 1.9
3250 2.8
3500 3.1
3750 4.4
4000 6.2
4250 7.4
4500 9.7

Engine: '00
Turbo: GT2554
Manifold: AVO
Downpipe Size/Style: AVO cast ordinary
Exhaust Size: 2.5" custom
Exhaust Components: metal cat, resonator, large magnaflow muffler
Intercooler Core Size: 9x16x3" AVO
Intake Manifold: Stock VICS
Headwork: DIY mild porting, deshrouding, blended bowl
Engine Management: AEM
Other Spoolin' Helpers/Hurters: 8.4:1 Mazda pistons, standard bore

FOURTH GEAR PULL:

RPM Boost(psi)
1800 2.5
2000 4.7
2250 7
2500 9.2

Engine: '00
Turbo: GT2560
Manifold: ETD shorty, internal gate
Downpipe Size/Style: BEGI custom divorced d/p
Exhaust Size: 2.5" custom
Exhaust Components: metal cat, resonator, large magnaflow muffler
Intercooler Core Size: ~9x16x3" TDR i/c
Intake Manifold: Stock VICS
Headwork: DIY mild porting, deshrouding, blended bowl
Engine Management: AEM
Other Spoolin' Helpers/Hurters: 8.4:1 Mazda pistons, standard bore; metal cat is half clogged.

FOURTH GEAR PULL:

RPM Boost(psi)
2000 2.5
2250 4.4
2500 6.1
2750 7.6
3000 10.2

here's a graph of several

http://forum.miata.net/vb/attachment...chmentid=71674

Description here:
http://forum.miata.net/vb/showthread...9&page=2&pp=25

Engine: unopened stock '90 2.0L FE-dohc
Turbo: Garrett t3/t4 stage 3 AR48, 50 trim AR60
Manifold: SS Autochrome BP top-mount mild stainless steel (modified flange to fit FE)
Downpipe Size/Style: Single tube 3"
Exhaust Size: 3"
Exhaust Components: 300 cel metal cat, 18" louvered glass-pack and Raptor turbo-style muffler (quiet)
Intercooler Core Size: 18"x12"x3" eBay bar/plate
Intake Manifold: Top half 1.6 Miata, Bottom half Kia Sportage
Headwork: none
Engine Management: FM Miatalink 1.6
Other Spoolin' Helpers/Hurters: Incomplete closed loop tune on Link EBC. Stock Mercedes internal wastegate w/helper spring. Still haven't dyno tuned the engine management...soon.
Trans & Rear End Ratio: 5-speed, 4.1 open
Rear tire size: 205/45-15
atmos: 98kpa

FOURTH GEAR PULL:

• 1800 onset
• 2500 2
• 3000 4
• 3550 8
• 3750 10
• 4000 12
• 4200 15
• 4400 18.7

FIFTH gear data, same setup as my post #11:

2000 3
2250 5
2500 6.8
2750 8.6
2900 10

5th gear data about matches Paul's absurdflow data in the graph above, but doesn't beat PhilMD's.

Plot for those posted so far

OK the new and improved graph is posted above. The xls file is attached to this post so if you want to change the plot or add your data, go for it.

Cueball's boost slope is nuts! Pipefathers is pretty steep too.

It is also interesting that Brain and TurboTim took two completely different approaches and ended up with practically identical spool behavior.

JasonC no offense but are you sure about your numbers? Our setups are pretty similar but yours is spooling 500 rpm sooner with a clogged cat?

Of course the other factor here is efficiency and how that translates into power. It would be interesting to see a 3-D plot with power added as a third axis.

I updated my log as well...I copied from an old thread just to start the thread, I had new data to share.

I'll post Paul's to the best of my knowledge. He will let me know if I'm off here. The spool data is taken from the original thread.

Engine: '99 1.8L
Turbo: Garrett GT2560R
Manifold: Shore Motorsports Absurdflow
Downpipe Size/Style: Bellmouth 3"
Exhaust Size: 3" Absurdflow Stainless
Exhaust Components: 3" Magnaflow metalcat and 4x12
Vibrant resonator
Intercooler Core Size: 18"x12"x3" side entry bar/plate ebay special
Intercooler Plumbing Size: 2.5" Stainless
Intake Manifold: BEGI
Headwork: stock '99
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: ?
Trans & Rear End Ratio: '94 5-speed, 3.9 torsen
Rear tire size: ?

FOURTH GEAR PULL:

RPM Boost(psi)
1750rpm 0psi
2000rpm 2.9psi
2200rpm 4.6psi
2500rpm 6.5psi
2700rpm 8.5psi
3000rpm 11.6psi
3200rpm 14.0psi

301rwhp @ 14 psi

rear tire size at that time was 215/45/15.

That was when i was just learning how to use the EBC and my chart was as follows. The 2nd one is what I run now. I should go do a log just for the fuck of it.

I'll chime in with my unsorted map:

Engine: '94 1.8L
Turbo: Garrett GT2560R
Manifold: BEGi Cast "Directed Pulse"
Downpipe Size/Style: BEGI SGSS
Exhaust Size: Unknown, larger than OEM
Exhaust Components: OEM CAT
Intercooler Core Size: BEGI #2
Intake Manifold: Stock
Headwork: Sandblasted during rebuild
Engine Management: Megasquirt MSPNP9495 HiRes
Other Spoolin' Helpers/Hurters: 8.6:1CR, EBC, AFR:Pig rich
Trans & Rear End Ratio: 5-speed, 4.1 Open
Rear tire size: 195/50R15

FOURTH GEAR PULL:

RPM Boost(psi)
2105 0.4
2120 1.5
2314 3.5
2521 4.8
2745 5.9
2904 7.1
3009 7.8
3100 8.7
3226 9.9
3344 10.6
3405 10.9
3549 11.7
3667 12.8
3693 13.6
3717 14.1
3933 14.4
3992 14.8

I updated the XLS and made this image.

youre still using my old data. i hate you.

Can't see what you're talking about :bowrofl:

look at my first post and compare it to the data in the spreadsheet.

Yea I know, I updated my post and played innocent. I see you did the same?!

I changed closed loop spike suppression settings and pulled an entire 100rpm off my spool from 3500 - 4300 rpm (where I hit 17.1). But now I spike nearly 1 psi over my target. Worth it I suppose. Just need to fix the droop on the other side of the spike. If I can get a decent boost line I'll drop my muff for a straight pipe and do a log. PipeFather needs to post his spool with just the open downpipe!

Yea definitely. I did do a log when I wasnt running EBC yet and I hit wastegate opening pressure about 700 rpm sooner. My fucking laptop crashed soon after so I have no proof.

So yeah, I have no doubt that this would be the quickest spooling setup bar none when i have an exhaust that's worth a shit.

Hey I don't think my T3 is doing too shabby, fits right in with an inefficient 2560 1.8L setup. headwork FTW.

Pipefather have you got more spool data on the wrx td04 turbo ?
I am keen to see any other info on it - so far it seems that the td04 is very very under rated - your spool makes it seem awesome ! - please share any other data

ARTIE'S

Engine: '95 bottom end with a '99 head 1.8L
Turbo: GT2560R
Manifold: AbsurdFlow ceramic coated
Downpipe Size/Style: Bellmouthed 3"
Exhaust Size: 3"
Exhaust Components: 3" Magnaflow metalcat & Magnaflow Muffler 4x9x14
Intercooler Core Size: 18"x12"x3" ebay cooler
Intercooler piping: 2 1/2" ebay aluminum shit
Intake Manifold: stock 99 intake manifold with VICs disabled open
Headwork: stock 99 head
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Toyota COPs
Trans & Rear End Ratio: 5-speed, 4.1 Torsen
Rear tire size: 215/40-17

FOURTH GEAR PULL:

RPM PSI
2091 3.91
2197 4.35
2307 4.78
2404 5.07
2506 5.5
2603 6.2
2713 7.6
2818 9.5
2920 11.6
3037 13.9
3123 16.9
3209 17.2

Just set up Artie's EBC today. We were shooting for max boost in the mid 14's. Had to crank the 3200 duty cycle column down because it was making 17.2 psi. It now hovers between 14.5 and 15.5 from 3200 to redline

I went out and did a log today of my setup. Previous numbers were from the time before EBC was tuned.

If somebody could update the graphs, please, thank you:

RPM Boost
1194 0.43
1287 1.00
1396 1.29
1529 1.29
1636 1.57
1694 1.43
1788 1.72
1893 1.72
2064 2.29
2109 2.72
2204 3.15
2336 3.72
2423 4.58
2541 5.15
2605 5.73
2763 7.44
2897 8.87
2976 10.94
3029 10.56
3087 10.38
3161 10.38
3238 9.84
3291 10.02
3332 10.74
3425 9.84
3483 10.20
3562 9.13
3647 9.13
3682 9.84
3709 10.56
3795 10.02
3837 10.20
3934 10.56
3957 9.84

Updated.

Engine: '99 1.8L
Turbo: Garrett T3 60 trim .48 turbine
Manifold: BEGI cast seperate pulse
Downpipe Size/Style: 2.5-3.0" with wastegate reintroduced
Exhaust Size: 3" Enthuza
Exhaust Components: 3" ANSA Muffler
Intercooler Core Size: 18"x6"x3" side entry bar/plate spearco
Intercooler Plumbing Size: 2.25" Stainless
Intake Manifold: Stock
Headwork: stock '99
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: 3" intake with huge filter?
Trans & Rear End Ratio: '99 5-speed, 4.30 Open
Rear tire size: 205/50r15

FOURTH GEAR PULL:

RPM Boost(psi)
2019rpm 0psi
2269rpm 1.3psi
2434rpm 2.0psi
2511rpm 2.6psi
2725rpm 4.5psi
3023rpm 7.7psi
3290rpm 12.1psi

Running low boost due to spark blowout. It will spike to 14 once in a while if I give it hell at high RPM.

updated again.

Yeah boy thats me right therrrr.
Once I get the COPs installed, hopefully this week, I will crank the boost and get some hardcore high boost figures for this bad bia.

Cool, it now appears that I have the quickest-spooling 1.6 out there. Feels good to know that my analysis (number 1 andnumber 2 ) was spot on. I really need to log a run with only the downpipe and post back.

but my turbo is like 3x the size :)

But are you making 3X the power? :D

we'll find out Friday when i go back to the dyno ;) but no, no I'm not.

scott, on your chart, can you beef up the lines on the legend? they're teeny.

PS what time on friday?

and technically my wheel compares to yours like this:

tdo4l-13T

Turbine
EX: 41.14mm IN: 47.24mm

Compressor
IN: 40.64mm EX: 56.01mm
420CFM / 265 HP

Super 60

Turbine
EX: 48.72mm IN: 58.9mm

Compressor
IN: 48mm EX: 60mm
500CFM / 315 HP



y8s, I'll see what I can do about the legend. Noonish at Moore's automotive in Fairfax.

are you posting specs for all turbos listed in the spool chart? ;)

Posting this too because jesus I want a VVT head :eek5:

user PhilMD at m.net
Engine: '01 longblock, Weisco 9:1 +1mm pistons
Turbo: GT2560R
Manifold: AVO
Downpipe Size/Style: AVO, unknown size
Headwork: unknown, VVT head
Engine Management: MoTeC
Other Spoolin' Helpers/Hurters: VVT, VVT, and...vvt.
Transmission 6-speed

FIFTH GEAR PULL:

RPM Boost(psi)
2500rpm - 7.9psi
2750rpm - 11.1psi
3000rpm - 14.2psi
3250rpm - 16.2psi
3500rpm - 16.6psi

Updated- 5th gear freeway pull from low rpm. Much better example.

Engine: '94 1/8L
Turbo: GT2860rs
Manifold: BEGi S4 stainless tubular
Downpipe Size/Style: BEGI divorced
Exhaust Size: 2.5"Exhaust Components: Magnaflow Muffler, metal cat
Intercooler Core Size: 18"x8"x3"
Intake Manifold: Stock
Headwork: none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Toyota COPs, lead foot,

5th GEAR PULL:

RPM Boost(psi)
5th gear pull VS. 4th gear pull (avg of 3 pulls)
1925 = 1psi = 1863
1985 = 2psi = 2060
2115 = 3psi = 2225
2335= 4psi = 2456
2460 = 5psi = 2549
2628= 6psi = 2733
2735= 7psi = 2880
2790= 8psi = 2990
2880= 9psi = 3090
2960= 10psi = 3190
3061= 11ps = 3250
3135= 12psi NA (no overboost)
3260= 13psi NA (no overboost)


OK, my 1st one sucked. It was taken from a track day in a low gear, revs never dropped low enough.

Here is a log from a 5th gear pull on the freeway this morning from 1900 rpms. Much better! Please correct my shameful 1st one on the xls chart! :bowrofl:

If I had any idea how to make or modify that chart I would do it myself. Sucks to be older with little knowledge of xls basics.

i have office 2007 at home which makes the chart look pretty and sharp. looks like ass off the older verison.

anyways, clearly see 5 groupings: The super spoolers. The 2554 and 2560s. The T3s. The large trims. And the super large trims.


interesting to see how my boost build compared to chad with same turbo manifold and exhaust. looks like my headwork may help me below 3K, despite my 200cc less. granted I'm still making 200cc less power :(

gimme the dataz.

I plotted Cueball's data cause I am at home sick today and freaking bored. I cannot repost the new graph since I am using Open Office and a lot of the Excel formatting is lost in translation.

But, Cueball's spool is right in there with the 2560 plots. Very nice! The only thing I can see in his setup to explain this is the S4 manifold. If that is the case, then it seems like a 2860 with an S4 could be a good choice for the street since it still spools nicely and should be a bit more efficient than the 2560.

Wow, I was gonna say, cueball's data looks close to mine, and THEN I realized it's a GT2860 on an NA 1.8 head. Damn!!!!

I made my own. includes cueball's latest. and some dude named PhilMD.

scale it from 0-15psi and 1750-4100RPM.

Thanks guys! That plot was on my freeway commute this morning. Got out ahead of traffic, dropped to 1500rpms in 5th and floored it. Overboosted to 13psi until the EBC kicked in and dropped back. Let off then. 2.5" enthuza with race cat. Corky talked me out of the 2560 in favor of the 2860 on my system. Now I know why.

All those super-charger guys talking about instant spool and flat torque can kiss my lily white behind.

what fer

how about grouping into 3 or 4 categories- of course the 1.6's have to be kept in a separate graph ;)

What's a race cat? A resonator that looks like a cat?

Or a feline with racing stripes? (LOL I shaved one of my long-haired cats once because I was tired of his shedding, and started with racing stripes)

Note to self:

1. Ballast the car to bring it up to the same weight as the rest of these pigs to increase load and improve spool
2. Do a pull from 1000rpms to inflate results over real world scenario
3. do pull in 5th gear to increase load and improve spool

If you did that, Tim would just remove one of his turbos and spank everybody. ;) And yes, I think it was mentioned to make pulls/data 1:1. So cueball, you need to do a fourth gear run for relative placement in the data.

cueball's line is making my pants tight...in the bad place. That turbo with 120cc more, the 99-head, and ebc should get the job done.

i better be making +260rwhp at 15 pounds on friday.

Engine: '91 1.6L
Turbo: G15
Manifold: Greddy
Downpipe Size/Style: Turbotony
Exhaust Size: 2.5"Exhaust Components: Custom 3" cat back, turbo tony cat
Intercooler Core Size: Starion
Intake Manifold: Stock
Headwork: none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: 4500ft-5500ft. elevation, mild built motor, fidanza flywheel act 6 puck, spring and ball MBC.

4th GEAR PULL:

RPM Boost(psi)

2926= 3.3psi
2985= 3.8psi
3111= 5.3psi
3384= 7.2psi
3445= 8psi
3471= 8.8psi
3562= 10.8psi
3628= 11.8psi
3671= 12.8psi
3775= 14.3psi
4003= 15psi


I based the psi numbers by subtracting an assumed 1 atmosphere of 12.46 from my map values. This isn't entirely accurate because the altitude of my city changes so much depending on what part of town you are in and I didn't want to break out the GPS. I estimated on the low side of 4500ft.

http://www.engineeringtoolbox.com/ai...ure-d_462.html