GT2871 Highway pull and dyno graph. - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-25-2011, 12:54 PM   #21
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Judging by his injector size in his signature, I don't think he's on E85. I do see WI, however, how the hell are you not getting detonation?
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Old 02-25-2011, 12:59 PM   #22
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I have sigs disabled FTL
That makes it even more insane then: all that boost/timing on pump gas+w/i? You have ***** lol
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Old 02-25-2011, 01:35 PM   #23
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WI makes that timing graph make sense. I was like holy **** **** at first though.

Brain those pistons are only 9:1. Not super low comp.
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Old 02-25-2011, 01:36 PM   #24
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8.7:1 is super low, 9:1 is low. Got it.

thanks for the clarification.
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Old 02-25-2011, 01:37 PM   #25
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Quote:
Originally Posted by wes65 View Post
Yes, I will get another video.


I did a lot of adjusting on my boost controller but usually between 17-19psi.

Lots of timing.



Stock fuel pressure, 550cc injectors.
My early spark tables are very similar, but I can't find it on the forum and I'm at work so you get no pics. However, I run my spark angle a bit lower today after I started letting the dyno pull-down the motor to get a good, realistic track-like duty cycle going, while using Jeff C's det cans. I wouldn't say I heard detonation, but there is a change in the combustion sound, slightly off-rhythm when doing this procedure. That sound made me yank a couple degrees and the syncopation-rhythm went away.

I recommend you pull 3* or so from 128kpa+ if you ever plan to put the car on the track. That spark table can work on the street, but considering time where I'm running the car from 100-158mph every lap, pulling some spark angle makes sense for reliability. I keep telling myself to install the EGT gauge and get better data, but that requires drilling into the AF manifold and I don't have the heart to do that.

I'll post my spark table later, but this dyno sheet shows the progression to MBT while tuning at low boost for NASATT classing. I added 2* on each pull and you can clearly see that red is the greatest output, green is advanced beyond MBT, and blue is where I started and where I left it. I'm not sure how much extra heat that 3* retard from MBT puts in the exhaust, but I still see <190*f radiator inlet temps.
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Originally Posted by Faeflora View Post
WI makes that timing graph make sense. I was like holy **** **** at first though.

Brain those pistons are only 9:1. Not super low comp.
Ah ****, disregard everything I just posted...maybe I'll leave it for the good of the people.
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Originally Posted by Braineack View Post
8.7:1 is super low, 9:1 is low. Got it.

thanks for the clarification.
It's even lower if he's on an early 1.8 bottom end and a 99 head.

Last edited by hustler; 02-25-2011 at 01:50 PM.
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Old 02-25-2011, 01:41 PM   #26
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Quote:
Originally Posted by Braineack View Post
8.7:1 is super low, 9:1 is low. Got it.

thanks for the clarification.
No 9:1 is normal comp. 8.7:1 is low comp. This is very important.
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Old 02-25-2011, 01:42 PM   #27
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Quote:
Originally Posted by Braineack View Post
8.7:1 is super low, 9:1 is low. Got it.

thanks for the clarification.
and anything lower is just LO AS A HO ON DA FLO

I'll be doing a piston swap to 5.1:1 soon so I can run >100*

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My spark table is very similar, but I can't find it on the forum and I'm at work so you get no pics.
yours goes up to 23* IIRC
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Old 02-25-2011, 01:52 PM   #28
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Quote:
Originally Posted by 18psi View Post
and anything lower is just LO AS A HO ON DA FLO

I'll be doing a piston swap to 5.1:1 soon so I can run >100*



yours goes up to 23* IIRC
I don't remember, i thought it was a bit higher at low boost. I lowered it after I considered the reality of running 100-150mph 50-times in one day.
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Old 02-25-2011, 02:38 PM   #29
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Quote:
Originally Posted by 18psi View Post
Holy ****
That is a ton of timing in boost.

out of boost though most of us run ~40 or so. could probably bump that up.
Thanx for posting the spark map. I'm always dying to see other e85 cars spark maps
Yeah, that's 93 pump gas with 50/50 meth mix @ 7gph

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Originally Posted by magnamx-5 View Post
ahem WI has alil something to do with his succes as well.
Indeed it does. Your spark map was the inspiration for mine.

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Originally Posted by TurboTim View Post
What compressor trim 2871? 48, 52, 56?
56

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Originally Posted by 18psi View Post
I have sigs disabled FTL
That makes it even more insane then: all that boost/timing on pump gas+w/i? You have ***** lol
95, MSPNP, 1.9L 99 head, 550's, 949 racing twin disc, 6-spd, gt2871, 9:1 Wiseco's, M-Tuned Rods, ARP Head and Main Studs, ACL Bearings, BE OPG'S, ATI Super Damper, HDHTHCDD, DO WI

Quote:
Originally Posted by hustler View Post
My early spark tables are very similar, but I can't find it on the forum and I'm at work so you get no pics. However, I run my spark angle a bit lower today after I started letting the dyno pull-down the motor to get a good, realistic track-like duty cycle going, while using Jeff C's det cans. I wouldn't say I heard detonation, but there is a change in the combustion sound, slightly off-rhythm when doing this procedure. That sound made me yank a couple degrees and the syncopation-rhythm went away.

I recommend you pull 3* or so from 128kpa+ if you ever plan to put the car on the track. That spark table can work on the street, but considering time where I'm running the car from 100-158mph every lap, pulling some spark angle makes sense for reliability. I keep telling myself to install the EGT gauge and get better data, but that requires drilling into the AF manifold and I don't have the heart to do that.

I'll post my spark table later, but this dyno sheet shows the progression to MBT while tuning at low boost for NASATT classing. I added 2* on each pull and you can clearly see that red is the greatest output, green is advanced beyond MBT, and blue is where I started and where I left it. I'm not sure how much extra heat that 3* retard from MBT puts in the exhaust, but I still see <190*f radiator inlet temps.

Ah ****, disregard everything I just posted...maybe I'll leave it for the good of the people.

It's even lower if he's on an early 1.8 bottom end and a 99 head.
I would definitely run a more conservative map on the track. I am running a 96 bottom end and 99 head, does that mean my compression is lower than 9:1?
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Old 02-25-2011, 03:09 PM   #30
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Quote:
Originally Posted by wes65 View Post
I am running a 96 bottom end and 99 head, does that mean my compression is lower than 9:1?
Interested in more info on this as well. I'm running a similar setup and had assumed it would maintain the NA compression ratio.
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Old 02-25-2011, 06:19 PM   #31
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You wouldn't happen to know your launch control settings would you? No matter what I do mine tends to want to hesitate to launch rpm and never seems consistent.
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Old 02-26-2011, 12:47 AM   #32
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Quote:
Originally Posted by Sokool View Post
You wouldn't happen to know your launch control settings would you? No matter what I do mine tends to want to hesitate to launch rpm and never seems consistent.
Here's my msq.
Attached Files
File Type: zip msq.zip (5.7 KB, 34 views)
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Old 02-26-2011, 09:32 AM   #33
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56trim 2871...nice. Turbine A/R?
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Old 02-26-2011, 10:18 AM   #34
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Quote:
Originally Posted by wes65 View Post
Here's my msq.
Sweet thanks!
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Old 02-26-2011, 11:05 AM   #35
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245whp, 11psi, track safe in my opinion:

I had to drop to 9psi and lower spark to hit 210whp for TTB bullshit classing.
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Old 02-26-2011, 12:21 PM   #36
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Quote:
Originally Posted by TurboTim View Post
56trim 2871...nice. Turbine A/R?
.86 I love this turbo. It is amazing. I replaced my disco potato with this and the difference is immense.
http://www.atpturbo.com/mm5/merchant...egory_Code=GRT

Thats the one i bought.
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And for some reason, i cant help myself but to post a picture of this baby. This is my favorite part of the car.

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Quote:
Originally Posted by hustler View Post
245whp, 11psi, track safe in my opinion:

I had to drop to 9psi and lower spark to hit 210whp for TTB bullshit classing.
You never answered our question about this statement.
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It's even lower if he's on an early 1.8 bottom end and a 99 head.
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Old 02-26-2011, 12:49 PM   #37
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Quote:
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You never answered our question about this statement.
John and I put a few 99-heads on early 1.8 bottom ends and they never seem to make more power aside form a slight increase in mid-range. I'm not sure if the cams mount higher, altering the cam timing (VW issue) or if the deck is higher but something strange is going on. The next time we have the two lying around maybe he and I can measure.

There's a rumor in town that the 949 clutch overheats on long drives for some reason, can you attest to this? I hope this is the case, it will save me some money.

I guess you also agree that this clutch changes the game and makes you smile every time you drive it? I'm always giddy when I hop in John's car and I'd really like to get one in my car. I have a standard weight clutch assembly right now and I'd really like to downshift faster, especially with the tight ratios; I've been skipping gears on every downshift.
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Old 02-26-2011, 02:03 PM   #38
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Quote:
Originally Posted by hustler View Post
There's a rumor in town that the 949 clutch overheats on long drives for some reason, can you attest to this? I hope this is the case, it will save me some money.

I guess you also agree that this clutch changes the game and makes you smile every time you drive it? I'm always giddy when I hop in John's car and I'd really like to get one in my car. I have a standard weight clutch assembly right now and I'd really like to downshift faster, especially with the tight ratios; I've been skipping gears on every downshift.
Well, the farthest I've driven it at once was 4 hours to Nashville. It was the middle of summer and I was having plenty of fun on the interstate. I didn't notice any problems then.
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Old 02-26-2011, 02:50 PM   #39
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There's a rumor in town that the 949 clutch overheats on long drives for some reason, can you attest to this? I hope this is the case, it will save me some money.
You don't mean my clutch, which is NOT 949, right?
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Old 02-26-2011, 03:01 PM   #40
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I thought you sold that clutch.
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