So, I installed the SL55 Kompressor fuel pump and while I have not yet done a dyno run, I can say with certainty that the power has been restored (at least) at the 4000-6200 rpm range. Although the butt dyno is not a valid test, all I can say is that my smile meter is now pegged when I hit the slanty pedal. I double checked with Jerry at Eurocharged and he said that I DON'T need a new tune and I should definitely expect that there is more whp now that the fuel is up to snuff. Once things get a bit warmer around here, I will get a dyno and a/f check to see where we are for a final report on the Needswings/Waldig Crossover tweaked manifolds.
Cheers,
Dave
Originally Posted by
Da55id
Thanks for the reply. What I can say is that the last tune I got prior to the crossovers, Jerry of Eurocharged who did the tune on the dyno told me there was no more fuel available in the then current setup and if I added more air I’d need more fuel for sure. Are you saying that I don’t need more fuel at the top end? Thanks in advance.
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Hi Woodie, After installing the crossover manifolds on my SRT6, I did a dyno run. I am listing the results below...
before crossover manifolds my AFR at 6200 rpm was 12.5 (a bit too lean) and wheel horse power was 340hp
after installing crossover manifolds the AFR went to 13.8 and wheel horse power was 296hp - no doubt because the ECU was pulling timing to prevent detonation.
So, after confirming that there were no air leaks as a result of the installation, there was only one change made. Crossovers. So, while it must be true that there is lower pressure on the fuel injectors, that does not help increase fuel delivery if the pump is maxed out relative to the additional oxygen/air being delivered to the cylinders. At least that's what the data from my N of 1 testing reveals.
The good news...there's a lot of additional air getting into the engine, especially at and above 4k rpm!! I expect significant gains therefore, once the engine gets more fuel...thus,
The bad news...I need more fuel flow. I'm hoping that adding the sl55, pn 7.00228.51.0 fuel pump will solve the problem.
any observations and/or suggestions are welcome.