Got the car dyno tuned, had a weird problem though...check it out..
#1
Got the car dyno tuned, had a weird problem though...check it out..
First of all, some of you ahve seen my recent posts about my cam and intake swap. Well i finally took it to a tuner, mike norris @ norris motorsports to be exact here in indiana. Id like to start off by saying thank you to mike, awesome guy to work with and he knows his ****! Now the thing that scared me though, hes been doing this a long long time, and he couldnt figure out what was up with my car. ok heres what was going on..
When i got there, he puts it up on the dyno, hooks evrything up and does a base line ll...the car put down like 236 hp......The reason being...the car was waaaaaaaaaaayyy waaaaayy lean... He kept messing with it and messing with....he finally got it to a safe AFR...and did the final dyno pull that scored me 383/360...not too shabby, but, with this cam, i had the impression i should b more in the 400/380 area. He said he had to force the car to put fuel to the motor. So much in fact, that he said he had the AFR set for like 10.1, cuz it would only do 13.xx. Hes like "in the 10 years ive been doing this, ive never had to do this to a car to adjust the fuel trims.." and he couldnt really figure out what was up. He said the fuel pressure checked out, and the o2's were working. He did say though the injectors are maxed out. He told me to go ahead and replace the MAF and pick up some 30lb svo injectors and if it runs really rich, that was the problem...he said it could also be the PCM not calculating the tune right? or someting like that...do you guys have any ideas? it kinda stumps me
Mods are in sig!
heres the graph..
When i got there, he puts it up on the dyno, hooks evrything up and does a base line ll...the car put down like 236 hp......The reason being...the car was waaaaaaaaaaayyy waaaaayy lean... He kept messing with it and messing with....he finally got it to a safe AFR...and did the final dyno pull that scored me 383/360...not too shabby, but, with this cam, i had the impression i should b more in the 400/380 area. He said he had to force the car to put fuel to the motor. So much in fact, that he said he had the AFR set for like 10.1, cuz it would only do 13.xx. Hes like "in the 10 years ive been doing this, ive never had to do this to a car to adjust the fuel trims.." and he couldnt really figure out what was up. He said the fuel pressure checked out, and the o2's were working. He did say though the injectors are maxed out. He told me to go ahead and replace the MAF and pick up some 30lb svo injectors and if it runs really rich, that was the problem...he said it could also be the PCM not calculating the tune right? or someting like that...do you guys have any ideas? it kinda stumps me
Mods are in sig!
heres the graph..
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I would say injectors is a solid investment. Some say they are good to 450 hp, I say they are needed after you pass the bolt on level. The S.A.E. says you aren't supposed to run injectors past 80% duty cycle. They already are likely that on a bone stock motor. See what I mean?
I would recommend a set of FIC rejetted/flow-matched stockers over SVOs.
I would recommend a set of FIC rejetted/flow-matched stockers over SVOs.
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#4
I would say injectors is a solid investment. Some say they are good to 450 hp, I say they are needed after you pass the bolt on level. The S.A.E. says you aren't supposed to run injectors past 80% duty cycle. They already are likely that on a bone stock motor. See what I mean?
I would recommend a set of FIC rejetted/flow-matched stockers over SVOs.
I would recommend a set of FIC rejetted/flow-matched stockers over SVOs.
Hmm....it was gonna b my last resort....
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agreed... Had a friend with a 04 gtp and this was the problem with his. Ran fine but inj duty cycle was maxed and shouldnt have been on the dyno. It also had 3-4 degrees of kr that it shouldnt have had. Pump eventually went out months later and when new stocker went in inj duty cycle went to normal and No kr......
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If you haven't already, post this into the tuning section and I'm not 100% sure but ask by telling the computer to run 10 to achieve 13, is this PE table raping he's doing?
#12
waitin on his call. Hes really busy so it may take a day or two.
So apparently i have a fuel problem.. Could this really hinder me quite a bit of power or no? Anyone think my #'s are a little low? also, how much of a PITA is the fuel pump to change? I had an old 92 camaro when i was a young broke kid and ended up cuttin a hole in the rear hump and changing it that way. i really dont wanna do that to this car... thanks for the help so far guys.
#15
ok, well, at least i have a starting point.... You guys suggest a walbro 255? do i need the hot wire kit?
So imm a buy...
walbro 255
Fast 36lb injectors
Z06 or SLP MAF (whichever i can find cheaper)
hopefully this fixes my problems? lol.... anymore advise is def welcome
So imm a buy...
walbro 255
Fast 36lb injectors
Z06 or SLP MAF (whichever i can find cheaper)
hopefully this fixes my problems? lol.... anymore advise is def welcome
#18
Fuel filter is new and I checked the injector screens when I swapped intakes. As for as him being a tuner. I thinks he's a good tuner. He's pretty well known around here and the east coast and Florida. He didn't wanna send me home with my stock 15+ AFR...he told me to get injectors and come bak. In the tuning section they are saying its not a fuel delivery issue. Just my injectors.... I wish I knew how to tune.....