Most powerful C32
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From: ny
SRT6
I think I have the solution for SRT and SLK guys with fueling,but won't know till Saturday with the LET tuning session. C32's have in the tank pumps right. With the higher boost issues you can always use a map clamp. I'm sorting through this challenge one step at a time.
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I DON'T COME HERE ANYMORE
Do the SLK/SRT guys run one fuel pump? Comming from E85 conversions over here-try a Walboro dual set up-those will flow 1000cc injectors all day at 35+psi of boost-with the right map-fuel shouldnt be an issue with a SC or Turbo car-fuel rails, injectors, pumps, map-those need to def be looked at with more boost!
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03 g35 coupe...........02 c32 Sold
70gs455 did a flow test on various fuel pumps including the stock one. He concluded the stock fuel system will at least support 450whp-500whp.
http://www.crossfireforum.org/forum/...ight=fuel+pump
http://www.crossfireforum.org/forum/...ight=fuel+pump
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From: ny
SRT6
70gs455 did a flow test on various fuel pumps including the stock one. He concluded the stock fuel system will at least support 450whp-500whp.
http://www.crossfireforum.org/forum/...ight=fuel+pump
http://www.crossfireforum.org/forum/...ight=fuel+pump
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03 g35 coupe...........02 c32 Sold
http://www.crossfireforum.org/forum/...ad.php?t=32034
the video i showed with 378whp was with a 12.5 afr.
Last edited by TemjinX2; Apr 24, 2009 at 12:41 PM.
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From: ny
SRT6
most of the regulars on the srt6 forum seem to agree with his conclusion..
http://www.crossfireforum.org/forum/...ad.php?t=32034
the video i showed with 378whp was with a 12.5 afr.
http://www.crossfireforum.org/forum/...ad.php?t=32034
the video i showed with 378whp was with a 12.5 afr.
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03 g35 coupe...........02 c32 Sold
If he was correct then why would everyone be running 17.1 AFR. Bruno (SLK-32 Germany) is the only one not having fueling problems and his car was tuned by AMG in Germany using a different pump. You will all know tomorrow when my car hits the Dyno. I was 14-15.1 AFR on the factory pump, and I am expecting 11-12AFR tomorrow.
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From: ny
SRT6
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2005 Crossfire SRT-6
If he was correct then why would everyone be running 17.1 AFR. Bruno (SLK-32 Germany) is the only one not having fueling problems and his car was tuned by AMG in Germany using a different pump. You will all know tomorrow when my car hits the Dyno. I was 14-15.1 AFR on the factory pump, and I am expecting 11-12AFR tomorrow.
My last dyno was 377hp/367tq running a 185pulley, InMotion tune(only run 100pump gas) and other goodies with bone stock fuel system and AFRs are 12.2-12.4(O2 sensor mounted AFTER primary cat) at their leanest on the street and at the track.
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SRT6
One what was your outside air temps, also are you running modified manifolds
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Dyno'd saturday with the new fuel pump. 15.1AFR was reduced to 11.7 with plenty more fuel available. No bigger injectors needed, duty cycle was scaled back from 86-88%. This is the only mod you will need if you want to run the 185 or stacked pulley combo. The job takes about 10 minutes. The pump is only for SRT6 and SLK32 cars because the pump is an external one like ours.
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1970 Buick GS 455
The number also assumes 100% injector duty cycle - that might have not been explicitly stated but it's the (stock inj) curve closest to the top in the graph. And regarding the lean issue, not taking anything away from the talented tuners, but I doubt if they have enough insight into the ECM's to command the injectors to run static. While not the best idea from a dependability/reliability/safety margin standpoint, it is a way to obtain maximum fuel when trying to solve a lean condition. How many with a lean condition have verified thru real-time monitoring that their duty cycle is at/near 100% ?
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1970 Buick GS 455
Good point. In those systems where there is enough fuel pump capacity, this scheme will work. In our C32/SRT fuel systems, the stock pumps do not have enough excess capacity for this to work. Now replace the pump with a more powerful one (or add an in-line booster pump) then this is a reasonable approach.
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Good point. In those systems where there is enough fuel pump capacity, this scheme will work. In our C32/SRT fuel systems, the stock pumps do not have enough excess capacity for this to work. Now replace the pump with a more powerful one (or add an in-line booster pump) then this is a reasonable approach.
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GMC - Miata - Trek - P-Car
AMG insisted upon SL55 pump upfitting when their Performance Studio SLK32 customers chose to do away with the fatherland's 250 kph restriction. No such stipulation with the W203 chassis. My conservatively modified 19 psi C32 maintains a remarkably steady 3.8 bar/55 psi at the fuel rail’s Schrader valve and a pre-catalytic converter ~12.5 A/F ratio through beyond the top of fourth at WOT...off-highway, of course.
That said, there is also no eleven-second C32 of which I’m aware.
Must I acknowledge your your ten-second runs yet again?! :D
The C’s FPR - along with those in SLK32/SRT6 and blackbenzz’ - is an integral function of the fuel filter. Some have successfully referenced its atmospheric vent line to read other than ambient; Kleemann among them with their M113 V8 supercharger upgrade. They do utilize a BAP with their OTC M112 V6 kit, however.
Seems there’s more than one way to skin a cat.
Bosch fuel pumps
