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Old 07-28-2010, 11:07 PM   #151
pwschuh
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Finally got my turn on the dyno again.

Chart is posted below but it's not significantly different from last time. Last time's problems are fixed: fuel pressure is stable at all rpm and load levels.

This time's problem is clutch slip. Started to slip somewhere past 4500 RPM, so my power peaked at 4900 that run and no more power tuning runs were made. I could put a new clutch in and go back, but it's pointless since I will never be able to make the clutch slip on pavement with this wheel/tire combo. Disk is sintered metal 4-puck, PP is my old Centerforce.

I won't have complete maps until Saturday but tuner said it has a safe tune, only moderate ignition advance, injectors well within their limits. etc. It's now being tweaked for drivability (cold start, part throttle accel, etc.)

461 WHP at 4900 rpm
508 WTQ at 4500 rpm

Turbo is GT30R with .82 A/R turbine. Spool-up still looks the same as last time on the graph but both hp and torque build noticeably quicker than last time. I haven't driven it yet but tuner told me it has no discernible lag on the street. We'll see.

Dyno still Dynapack. Gas still Sunoco 93. Note ambient air temps during run, not sure how much affect that had on results. Last dyno figures posted were obtained when it was 15 degrees cooler.







Next steps are hood repair from where engine is trying to beat its way through, and some better kind of engine stabilizer.


.
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Old 07-28-2010, 11:11 PM   #152
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dude this car has always been ridiculous.
nice numbers holy SH*T and your prolly still making power well past 5k

5 stars.
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Old 07-28-2010, 11:20 PM   #153
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Great to see you're back to testing! Still seems like something's off though eh?. I think the hotside is really big for the cold side maybe - so it spools kinda slow but then the cold side chokes it.

What are afrs like in the spoolup range?
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Old 07-28-2010, 11:25 PM   #154
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nice #s
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Old 07-29-2010, 02:14 PM   #155
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What are afrs like in the spoolup range?
Hi Kenny,

What do you mean when you say "spool-up range"? The graph I posted includes the AFR's from 6 psi and up. Did you mean from vacuum up to 6 psi?
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Old 07-29-2010, 02:25 PM   #156
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100kpa +/- 30, probably.
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Old 07-30-2010, 01:22 AM   #157
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Originally Posted by pwschuh View Post
Hi Kenny,

What do you mean when you say "spool-up range"? The graph I posted includes the AFR's from 6 psi and up. Did you mean from vacuum up to 6 psi?
No sorry my bad, i didn't pay enough attention. I meant in the 0-14psi region. AFR's look plenty aggressive especially for pump gas - I was thinking maybe it was overfueled on spoolup but that deifnitiely isn't the case. 14.0 is a very lean spool.

Only thing that doesn't seem right to me is it's getting fatter after peak torque/power...
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Old 07-30-2010, 01:54 AM   #158
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How have I never seen this car before?

This thing is amazing! I've seen you post plenty before, but somehow never saw this thread. . .

All I can say is WOW!
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Old 07-30-2010, 07:20 PM   #159
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How have I never seen this car before?
n00b.
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Old 07-31-2010, 12:53 AM   #160
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Still seems like something's off though eh?. I think the hotside is really big for the cold side maybe - so it spools kinda slow but then the cold side chokes it.

What are afrs like in the spoolup range?
On the flip side, it also keeps the hotside significantly cooler and alllows for more time spent at high rpms without excessive heat buildup. That and a slightly smoother boost curve......... just throwin that out there.
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Old 08-14-2010, 02:47 AM   #161
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First off, I wanna say that, I first saw your car on DaveBarton's website and was astonished at your transmission config.
Second.

http://europeancar.automotive.com/17...240/index.html

I'm not sure if anyone has ever seen this car, but I think its the only car that I can compare to yours.
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Old 08-14-2010, 03:05 PM   #162
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what clutch/pressure plate/flywheel setup are you using?
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Old 08-14-2010, 05:27 PM   #163
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Quote:
Originally Posted by DaytonAE86 View Post
On the flip side, it also keeps the hotside significantly cooler and alllows for more time spent at high rpms without excessive heat buildup. That and a slightly smoother boost curve......... just throwin that out there.
Sure, but in that case you might as well size the compressor wheel appropriately to take full advantage of the larger hotside and keep everything running efficiently.
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Old 08-14-2010, 06:53 PM   #164
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Quote:
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what clutch/pressure plate/flywheel setup are you using?
Clutch disk and flywheel mentioned in the first post. Edited to show pressure plate.
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Old 08-14-2010, 08:27 PM   #165
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where would one get a super flexy lower hose like that for the radiator?
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Old 08-15-2010, 03:30 PM   #166
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where would one get a super flexy lower hose like that for the radiator?

http://www.summitracing.com/search/B.../?autoview=SKU
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Old 08-16-2010, 02:21 PM   #167
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Nice to see you still working on this one.

Good numbers on the dyno too.
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Old 08-19-2010, 06:56 PM   #168
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great numbers, paul. can't wait till i get to see your beast again
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Old 09-19-2010, 08:38 AM   #169
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Start, idle, rev:

http://www.youtube.com/watch?v=tDTyQHhwCrU

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Old 09-19-2010, 09:15 AM   #170
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SWEEET, i want to stop by and drop off your Roll correctors sometime soon. Maybe i can get a ride?
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Old 09-19-2010, 12:47 PM   #171
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holy crap that sounds mean as hell. i love it
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Old 09-19-2010, 03:12 PM   #172
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Dude-drive that biatch down to SE, and run it down the dragstrip.
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Old 09-19-2010, 07:17 PM   #173
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i want to stop by and drop off your Roll correctors sometime soon. Maybe i can get a ride?
Engine and hood are still fighting. I'm running out of inexpensive options. You're welcome to come by and kibitz. Next Saturday I'm in Baltimore for Mobtown Greaseball. Maybe next Sunday afternoon?

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Dude-drive that biatch down to SE, and run it down the dragstrip.
You funny. Two hours in the car at a stretch is about all I can do - way too noisy. I'd have to trailer it and my tow vehicle is in no shape for a 4-state trip. And even if my truck was ready, the car is a long way from being ready for a dragstrip. Current tires are useless with current engine. Not wasting my money on new tires until I can figure out how to mount at least 305 series tires on the back. I suspect anything less would be a waste of time. And like I said above, even with RSI Stage III poly mounts and hard braces on both sides of the block, the engine is still trying to beat its way out of the hood and I'm tired of paying for bodywork. Still very much a work in progress.
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Old 09-19-2010, 11:50 PM   #174
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Maybe Brett can sell you a kit of long studs and washers to jack up the rear of the hood, hotrod style.

I don't have any better suggestions, except those that involve considerable expense and/or hassle.
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Old 03-08-2011, 10:22 PM   #175
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Updates?
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