Engine: '99 1.8L Stock
Turbo: TD04L-13T
Manifold: 1 1/4" Schedule 40 LOG
Downpipe Size/Style: Modified 1.6L BEGI Segregated
Exhaust Size: 3" with Mag high flow Cat and Mag 5x22x11
Intercooler Core Size: 5.5x22x2.5
Intake Manifold: Stock
Headwork: none
Engine Management: MS3-Basic
Rear tire size: 195/50-15
Other helpers/hurters: 8 PSI Waste Gate Only

Fourth Gear Pull...

RPM: MAP (psi):
1320 0.3
1400 0.7
1500 1.0
1700 1.6
2000 2.6
2400 4.3
3000 5.9
3500 5.9
4000 6.6
4500 6.9

See This post for EBC at 12 PSI

Engine: 01' 1.8L with functional VVT
Turbo: Precision 4828
Manifold: BEGI cast style with EGR
Downpipe Size/Style: older BEGI non separated gasses
Exhaust Size: Flyin' Miata 2.5" with high flow cat and resonator
Other exhaust: Stock muffler for now.
Intercooler Core Size: 18"x8"x3"? (estimated from memory)
Charge Piping: 2" over the top style hotside, 2.5" behind headlight coldside.
Intake Manifold: Stock
Headwork: none
Engine Management: MS3x
Rear tire size: 205/45R16
Other helpers/hurters: Open Loop EBC, pull was done on slight incline.

This tune was about 230rwhp and 232rwtq on the dyno.


5th gear pull

RPM PSI
2011 -1
2159 0
2321 1.1
2534 2
2749 3
2987 4
3161 5
3333 6
3442 7
3585 8
3728 9
4381 10
4490 11.1
4675 12

[7/10/14 update] Just something I noticed... I am trying to limit my torque to levels safe with a stock motor so about 9psi and 3700 rpm I am starting to limit my boost with the EBC. If I weren't doing so I imagine that my spool would look a little more conventional albeit a bit late compared to others.

Engine: 1.9L forged 8.5:1 comp
Turbo: 2876
Manifold: Custom
Downpipe Size/Style: 3" merged w/ EWG
Exhaust Size: 3"
Exhaust Components: SS Pipe
Intercooler Core Size: BIG
Intake Manifold: Stock
Headwork: Porting/Polishing, valve job, and what not.
Engine Management: Mmm Squirt
Other Spoolin' Helpers/Hurters: Running wastegate spring only.
Trans & Rear End Ratio: 6-speed, 4.3
Rear tire size: 205/45-16

FIFTH GEAR PULL:

RPM Boost(PSI)
2200 - 2.1
3228 - 6.7
3526 - 8.0
3650 - 9.4
3729 - 10.4
3800 - 11.4
3955 - 14.2
4046 - 15.3
4612 - 16.8
5000 - 16.1
5574 - 15.9
6000 - 17.7
6156 - 18.0 (peak)
6500 - 15.4
6788 - 14.5
7006 - 14.7

:jerkit:
https://www.miataturbo.net/attachmen...ine=1404973365

Added my self and soviet added.

https://www.miataturbo.net/attachmen...ine=1404977044

Catfish 1.6
 

JDM 1.6 of indeterminate age or mileage
MSPNP2
FM Log
2560 Churbo, balanced to 150k
Custom 2.5" dump pipe exiting to 2.5" side pipe
FM IC with external BOV
6 speed (dyno done in 5th gear)
245/35-17" rims (23.7" diameter)

Mustang Dyno--this one has back to back dyno's with the DCSPort dynojet and is 20% conservative

Filter value is 6 out of 50 (not much plot line smoothing)

Adjusted "dynojet" numbers:

190whp = 228whp
170wtq = 204wtq

Engine: 1.8L '00 stock BP (not vvt)
Turbo: chrubo "disco potato" compressor: 3" inlet 2" outlet 0.6 A/R 48mm trim turbine: 0.64 A/R 76mm trim
Manifold: begi S4 style
Downpipe Size/Style: 60mm merged wastegate 42mm
Exhaust Size: full 60mm no cat no resonator, nothing!!!
Exhaust Components: magnaflow 60mm with dbkiller
Intercooler Core Size: 550 x 140 x 65 ebay intercooler
Intake Manifold: Stock
Headwork: none
Engine Management: emanage blue (temporary, waiting money for rev ms)
Other Spoolin' Helpers/Hurters: nothing, only wastegate with original compressor signal
Trans & Rear End Ratio: 6-speed, 3.909
Rear tire size: 195/50-15

FIFTH GEAR PULL:

RPM Boost(PSI)

2179 - 0
2481 - 1.45
2760 - 2.18
3087 - 3.63
3447 - 4.35
3860 - 5.8
4277 - 9.43
4394 - 10.15
4655 - 11.31

after 5000 rpm begins to drop down to 9.40 psi at 6500 rpm

Engine: 01' 1.8L with functional VVT
Turbo: Precision 4828
Manifold: BEGI cast style with EGR
Downpipe Size/Style: older BEGI non separated gasses
Exhaust Size: Flyin' Miata 2.5" with high flow cat and resonator
Other exhaust: Stock muffler for now.
Intercooler Core Size: 18"x8"x3"? (estimated from memory)
Charge Piping: 2" over the top style hotside, 2.5" behind headlight coldside.
Intake Manifold: Stock
Headwork: none
Engine Management: MS3x
Rear tire size: 205/45R16
Other helpers/hurters: Closed Loop - in the process of tweaking.
Slight up-hill pull so it may shift the boost earlier than normal.

5th gear pull

RPM PSI
2105 1
2209 2
2373 3
2598 4
2801 5
3076 6
3314 7
3426 8
3549 9
3680 10

Here is my turbo spool data for my BEGi S6 kit GT2860 turbo with Tial 38mm external wastegate with 8.7 psi spring. Full 3" catless exhaust is causing boost creep up to 11.5 to 12.0 psi even with the 8.7 psi spring in the wastegate.

Started runs from 1500 RPM up to a hair over 7000 in 4th gear on a 6 speed with 4.3 rear gear.

2000 1.5 psi
2500 2.7 psi
3000 4.5 psi
3500 7.5 psi Wastegate is cracking open here with the 8.7 psi spring.
4000 10.0 psi
4500 10.8 psi
5000 11.2 psi
5500 11.7 psi
6000 11.3 psi
6500 10.6 psi
7000 11.2 psi

I am wondering if with a manual boost controller I can improve spool up without making the boost creep worse.

Keith

Engine: 2000, 1.8L
Turbo: GT2560R
Manifod: ?
Exhaust Components: Racing Beat full exhaust
Intercooler Core Size: 18"x12"x3"
Intake Manifold: Stock
Headwork: Mild Porting
Engine Management: Adaptronics
Other Spoolin' Helpers/Hurters: Eagle rods, Wiseco pistons
Trans & Rear End Ratio: 5-speed
Rear tire size: 195/50r/15

4th gear pull @ 18psi

https://www.miataturbo.net/attachmen...ine=1414283308

What is your actual boost vs RPM? I just installed this same turbo and am curious as to how it looks on your 1.8 compared to my 1.6.

Also, that spot where your AFRs flatlined is hurting your spool. Do you know how fat it actually was there? Probably in the 9's? That dip in the TQ curve from 35-4500RPM is related. Any particular reason you made it that rich when you were tuning it?

I got the car the way it sits. I had a shop run a diagnostic dyno to see where it stands. We were surprised at the numbers but I have to get the software for adaptronics so we can adjust fire. That was just a diagnostic run.

Engine: 1999, 1.8L
Turbo: TD04HL-20T-6cm (OEM Caliber SRT4 turbo, with 6cm housing)
Manifold: Custom log
Exhaust Components: 3" DP, 2.5" back, 1 glasspack, Roadstersport3 muffler
Intercooler Core Size: 11"x12"x3"
Intake Manifold: Stock
Headwork: Stock
Engine Management: DIYPNP, sequential fuel
Other Spoolin' Helpers/Hurters: EBC, ID1000's, Toyota COP
Trans & Rear End Ratio: 5-speed, 4.30
Rear tire size: 205/40/16

3th gear pull @ 9psi

I have some work to do tuning the EBC between 3-4000 rpm, I can definitely reach full boost by around 3200.

https://www.miataturbo.net/attachmen...ine=1415553166

Mr aceduce802, perhaps you'd like to share with the class why we are not seeing a boost/rpm comparison? And furthermore, why in god's name did you choose 3rd (or 3th gear as you put it) , as clearly this isn't a 1:1 ratio as stated at the beginning of this thread?
We enjoy people thinking outside the box on their turbo builds, but as an engineer you should know to keep the data similar for comparison. :facepalm:

Boost/rpm is shown in the bottom graph, the dotted line. This is a log in 3rd because I haven't had the chance to safely log a 4th gear pull. There are others in the thread that have posted 3rd gear pulls, so there is data to compare to. However, I do understand that I don't have to take it to redline in fourth gear to show spool, so I will grab that data.

if you want your data to be relevant please do it in 1:1 gear and start at 2k rpm.

please. otherwise its pretty much useless

Engine: 1999, 1.8L
Turbo: TD04HL-20T-6cm (OEM Caliber SRT4 turbo, with 6cm housing)
Manifold: Custom log
Exhaust Components: 3" DP, 2.5" back, 1 glasspack, Roadstersport3 muffler
Intercooler Core Size: 11"x12"x3"
Intake Manifold: Stock
Headwork: Stock
Engine Management: DIYPNP, sequential fuel
Other Spoolin' Helpers/Hurters: EBC, ID1000's, Toyota COP
Trans & Rear End Ratio: 5-speed, 4.30
Rear tire size: 205/40/16

4th gear pull @ 9psi

RPM Boost(psi)
2240 2.3
2310 2.9
2405 3.9
2522 4.9
2608 5.7
2713 6.6
2815 7.7
2904 8.3
3000 8.9

9 psi until redline

Much better. And looks like the turbo comes on fairly quick, very similar to a t25

Yes I'm very happy with the response. Unfortunately I haven't been able to find a compressor map for the 20t, but I used a 19t map and it stays in the efficiency range just like a gt2560r, except it seems to have more potential at higher boost levels. I'm way too excited to build the motor, throw in a 6 speed, run a 3" exhaust, and turn it up. I was planning on doing a full 3" back exhaust first, but I don't see the real reason at this point, if I'm already at 230 whp with good spool.

Engine: 2002 VVT, forged everything
Turbo: Precision 4828
Manifold: BEGI log
Exhaust Components: 3" DP, 3" back, resonator and big magnaflow
Intercooler Core Size: 11"x12"x3"
Intake Manifold: stock VICs
Headwork: Stock
Engine Management: Rev MS3
Other Spoolin' Helpers/Hurters: DIY's EBC, ID650's, LS3 coils
Trans & Rear End Ratio: 6-speed, ??? rearend
Rear tire size: 175-14 snow tires!

5th gear pull @ peak of 21.77psi

RPM Boost(psi)
2625 0.88 -TPS hits ~100%. Little high, but this was the latest log
2721 1.99
2820 3.23
2922 4.25
3014 5.03
3105 5.99
3266 7.8
3339 8.57
3414 9.6
3521 11.05
3753 14.94
4031 18.22

Engine: 91 1.6
Turbo: T3 Churbo .42/.48 A/R, v-band outlet/ported IWG
Manifold: Tacotaco
Downpipe Size/Style: V-band 2.5" to 3.00"
Exhaust Size: 2.5" to 3"
Exhaust Components: Magnaflow 5x11x22 Muffler
Intercooler Core Size: 5.5x27x2.5"
Intake Manifold: Stock 1.6
Engine Management: Megasquirt "DIYPNP"
Other Spoolin' Helpers/Hurters: LS2 Coils, wastegate pressure
Trans & Rear End Ratio: 5-speed, 4.3 VLSD
Rear tire size: 205/50-15

4th Gear Pull

RPM Boost PSI
2000 0.3
2100 0.8
2200 1.4
2300 2.1
2400 2.9
2500 3.6
2600 4.5
2700 5.3
2800 5.9
2900 6.5
3000 6.8
3100 7.0 <-- 7psi Churbo wastegate
3250 7.1
3500 7.2
3750 7.1
4000 7.2
4250 7.2

https://www.miataturbo.net/attachmen...ine=1417665216