Question for you engine tuners
12-27-2010, 09:11 PM
#16
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475hp/460lb.ftthe numbers represent the mass of are relative to the mass of fuel. i.e. 14.7 lbs of fuel to 1 lb of fuel is stoich. therefore a lower number like 13.0 lbs of air to 1 lb of fuel would be richer.
12-27-2010, 09:32 PM
#17
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i installed the Reg along with 928MS injectors and rails. my old dampener and regs were shot. after my first dyno run a few months ago, and my disappointment, i am not working on getting the FP set in happy spot. And first thing tomorrow is to check the placement of the WOT and Idle switches. i have a feeling i set the WOT swith at, well, WOT.
12-27-2010, 11:33 PM
#18
Race Director
i installed the Reg along with 928MS injectors and rails. my old dampener and regs were shot. after my first dyno run a few months ago, and my disappointment, i am not working on getting the FP set in happy spot. And first thing tomorrow is to check the placement of the WOT and Idle switches. i have a feeling i set the WOT swith at, well, WOT.
12-28-2010, 12:06 AM
#19
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NO NO NO.....stoich at WOT is a bad idea...sure its ideal for cruising and good fuel mileage...but leads to detonation at high load in WOT conditions
Technically the best power is made around 13.0...but most tuners like the margin of safety that 12-12.5 gives (even richer boosted)
In general a stock 928 or close to stock 928 is pretty well tuned as is...my 84 Estate L jet racer is stock with a cat bypass & it makes great power at good AFR's and I haven't done ANYTHING to it....ZERO tuning...just run it...I am a bit lean in the midrange, but the AFR drops with rpm until about 12.6 at redline...hard to argue with 203whp-241 torque through an automatic when it was rated at 234hp-263 torque...
Technically the best power is made around 13.0...but most tuners like the margin of safety that 12-12.5 gives (even richer boosted)
In general a stock 928 or close to stock 928 is pretty well tuned as is...my 84 Estate L jet racer is stock with a cat bypass & it makes great power at good AFR's and I haven't done ANYTHING to it....ZERO tuning...just run it...I am a bit lean in the midrange, but the AFR drops with rpm until about 12.6 at redline...hard to argue with 203whp-241 torque through an automatic when it was rated at 234hp-263 torque...
Last edited by blown 87; 12-28-2010 at 12:22 AM.
12-28-2010, 05:52 PM
#20
Thread Starter
here is the dyno run. Now when i had this done, i did not have the fuel figured out at all, hense the lower numbers. what i did find on my spirited drive today is the car no longer has a "pull zone" from around 3-4k. timing is set on factory right now. And yes, i dont have a dampener anymore.
12-28-2010, 08:28 PM
#21
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12-28-2010, 08:36 PM
#22
Thread Starter
From the research i did on this set up (im not the first to do that) the regulator will dampen the fuel pulses just fine. i plan on doing a stand alone system like Carl sells some time soon. :-)
12-28-2010, 08:42 PM
#23
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I'm sticking with at least one dampener unless I go to a fully sequential system.
12-28-2010, 09:35 PM
#24
Thread Starter
i have a set of euro heads. thinking of making a hybrid motor. no boost (unless some one gives me a set up for free). sticking with 24lb injectors. but after my test drive today, she is doing much better! i had it WAY to rich
