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Ok Ive been chasing an issue.
6th gen camaro
A8 circle d converter
forged rods and pistons
holley hiram
400 shot direct port
vvt3 cam
brisk RR08S gapped .018
From 6500 up car breaks up Ive added fuel taken away fuel added timing took away timing. Can anyone see whats going on that I cant.
Any ideas?
You are way out of fuel. Your lo side drops into the 30s and you're definitely letting EOI extend way too far on the high side.
Are you trying to pull this shot off the rail? Have you done a plug pull? 28* feels like alot on a 400 shot even on E.
Also, it's odd that the logs show this vehicle as a 2014 camaro with a different VIN than the tune.
Attachment 94573
I have not sprayed on those. Trying to get the stumble fixed. It has a stand alone. Car was stolen and crashed. Bought it back put motor transmission in my 2014.
Well, it's out of fuel. You need to supply more low side to it for sure and the high side might pick up.
If I leaned it out more would it make that big of a difference for motor only? or should I go ahead and beef up the low side? Because i can obviously jet it rich for the nitrous to make up for that side of things. Thanks for the reply.
You're dropping way too much low side for leaning it out to really help. The HPFP is happiest when it's supplied about 72psi, and you're dropping to around half that in some of these logs making rail pressure drop which then increases injector MS beyond the limit of EOI
Ok I will get that handled. Thanks for the help.
You should be on a dedicated fuel cell for you nitrous
He mentioned having one.Quote:
Originally Posted by Ben Charles
Yes I have a stand alone for the nitrous. I failed the maf and that stumble up top goes away. However looking at the log the throttle isnt opening more than 74%. Put the MAF back in the equation and stumble is back and tps reads 91.7%. What can I do to make the throttle open wot when maf is failed? I also sprayed one of the runs I did with maf failed and car ran great minus tps.