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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 02-21-2007, 03:24 PM   #31
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Quote:
Originally Posted by willwren
Just a thought, but if he has no KR at higher rpm'*, how'* it possible for him to be outflowing his injectors at a lower rpm?
What is timing at the top of the gear? What is timing when it knocks at low rpm? It is very possible for the car to knock under load conditions at low rpm when asking for higher timing and not knock under WOT power enrichment mode with lower timing.

We could speculate all day on whats going on but without concrete numbers (IPW, injectory duty cycle, fuel pressure at WOT tests, timing vs rpm vs MAP etc...) it will be hard to pin down.

Have a power tuner or HPTuner handy for logging?
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Old 02-21-2007, 03:37 PM   #32
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Quote:
Originally Posted by Rogue
We could speculate all day on whats going on but without concrete numbers (IPW, injectory duty cycle, fuel pressure at WOT tests, timing vs rpm vs MAP etc...) it will be hard to pin down.
Very true, without a scan it'* just conjecture as to what'* happening, what'* the cause and what can be done.

Cheers,
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Old 02-21-2007, 04:34 PM   #33
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OK, I'll make it simple and just run with the Boost Cooler on most of the time I want to goose it around.....which is most of the time .

Soooo........might as well pulley on down to the 3.2"

Todd, I remember the Fuel flow values that you gave me a few months ago and I have never exceeded them.

Don't forget that I have boosted my fuel pressure to the point that my stock injectors are probably flowing 45 lbs/hr.
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Old 02-21-2007, 04:44 PM   #34
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Paul,

I don't want to tell you how to mod your car because you're free to do what you want however pulleying down would be the last thing I would do witih an unknown KR situation. IMO you need larger injectors, you need your PCM reprogrammed to run those injectors properly and you need to process your air more efficiently (cam comes to mind).

Relying on extra fuel pressure puts stress on the fuel pump whcih may fail prematurely. Relying on your water injection (whether it works or not) could be disastrous in the case of sprayer failure or you run out of water/methanol (get a leak somewhere an not know it). If your lucky you just blow a head gasket, worst case your replacing pistons or the bottom end.

You have done a great job with your car'* appearance, modifications, and upkeep, I just don't want to see anything happen to it.

Good luck in whatever you decide to do.
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Old 02-21-2007, 07:05 PM   #35
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Originally Posted by 2000SilverBullet
Soooo........might as well pulley on down to the 3.2"
Paul..one of the reasons I asked you to start this thread is because of the knock and my hopes that this could be worked on and fixed up. I've learned a few things from this thread.

At this point I certainly hope that with that smiley you are joking about pulleying down with KR. We are all well aware of the ultimate consequence that our modding can lead to.. death. Maybe the motor..maybe a piece of that motor comes through the firewall.

Please..let'* make your car faster. Last thing I want to do is come up in power while you are rebuilding because of ignored KR.
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Old 03-15-2007, 02:24 AM   #36
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Well I reluctantly shelved the smaller pulley and popped on the 3.4" in order to save my Methanol for this summer. :(

What a noticeable improvement 0.1" makes.

0 KR and full timing.

Victor and I went out for a cruise tonight

Dry roads...finally
Perfect conditions. Dry and a cool outside air temp of 44 F.
I always wait until the trani temp is up to at least 100 F before I lay on the throttle........unless I've had a few beer

So as soon as everything is up to temp......intake air holding steady at 100 F, coolant at 160 F.......my foot gets heavy and Victor starts to giggle.

He was out with me a few days ago with the 3.3" without running the water injection and definitely noticed a big difference in pulling power when it'* not pulling 7 to 10 degrees of timing.
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Old 03-15-2007, 07:47 AM   #37
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Glad to hear that. I personally have pulled back on my setup a bit lately and while timing isn't the highest, keeping KR out of the equation allows me to get more power.

How many miles did you log on the 3.4 so far?
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Old 03-16-2007, 01:24 AM   #38
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Not enough miles yet.

......and now it looks like rain for the next two weeks. :(

The torque now is truely impressive as the rpm builds. Peak torque twists the car and easily breaks both tires loose....at any speed in the city.

I plugged the adjustable trani oil pressure boost module into the trani for kicks (literally ) and now have the shifts real crisp.
...with lots of room to go harder for the track.

I removed it a few years ago when I got my first DHP PCM. One thing I can say about the DHP vs the INTENSE PCM is the DHP had slightly higher shift point, one degree more timing and a firmer shift setting......just didn't cut it with torque management and fuel curve settings.

The INTENSE PCM does not boost the pressure. I have the INTENSE trani shift kit installed so the PCM option was deleted.

Even with the lsd I'm back into major torque steer again.

This is fun.
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Old 03-16-2007, 03:16 PM   #39
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Glad to see the 3.4 is working out well. Thats about as small as I will be able to run this summer as well.
Its actually utilizing all the boost the 3.4 is giving it
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Old 03-16-2007, 04:18 PM   #40
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While the 3.4 pulley did get rid of your KR, that was not your issue IMO. If you had no KR with the 3.3 if you did a pull from like lets say a stop to like 100, but you had it from a 30 roll and then it immediately went away, thats a tune issue. Invest in a tuner and tune your car. Obviously the AE is off since it only happens under certain conditions. A good tune will completely correct this issue IMO.

What is happening is you are at low RPM and go WOT and it jumps to full boost but the PCM didn't give you enough fuel, so it gets 7* of KR right then, and then you have enough fuel so your KR goes away. Set it so it sprays a little more fuel under those conditions and you will have no KR. Thats the best way I can think to explain it anyways.

If you were to get a tuner you would not be disappointed.
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