Modifications = ECU problems.... Help?
Iv recently got modifications for my VS SS commy.
Worked heads ( bigger valves, ported, milled )
dual race springs
comp pushrods
twin exhaust
headers
street/strip cam ( rev range 3500-6400 )
I got a good deal and got these mods without proper research into ECU's. Turns out the stock computer cant be 'retuned' and someone in the tuning industry said that my cam is too wild for the aftermarket chips made for similar modifications.
Iv been told i need an adjustable ( retunable ) computer, does anyone know where i can get them for a good price, does anyone have one they want to sell or does anyone have any other ideas or advice?
Cheers, Matt
Tells it like it is.
ROTFL - your Delco ECU is one of the most tunable "factory" type ecu's out there! Question though - are you running the stock intake manifold and injectors? Have you bumped up your compression ratio or is it the stock 8.5:1???Originally Posted by mdebono
Reaper
Have you attempted to take it to be dyno tuned at all?
speak to greenfoam he did a cam tune for me and it worked wonders! got rid of the nasty flat spot down low.
If you ever come back to the forum to check your post, find me on ebay, I'll sort it out for you. It doesn't sound very difficult
Are you sure? the local EFI tuner says it cant be re-tuned and that i have gotta find an re-tunable comouter and then go back to him. Standard intake system except cold air intake and im going to hone the intake manifold and port match it although i really should do something to make it breathe better. Iv taken 20 thou off heads but will check valve to piston clearence before milling another 20 thou off, no idea what the ratio is ir will be though id say over 9:1
No i hav'nt, im taking it into the shop in a couple of days, he can have a look and ill see what he thinks but hes pretty adamant they cant be touched though.
It's pretty common knowledge around here that the delco ecu's are awesome, Do what greeenfoam said, find him on ebay, user 'nicefrog' and go from there. Your local EFI tuner either lacks serious knowledge, or is just trying to sell you a aftermarket ECU, as that's where the money is for him.
R.I.P dynoryder
as above your local tuner is full of crap.. sounds like hes trying to rip you off... greenfoam is the way to go ask any of the members on here who hes done a tune for i bet you wont find any unhappy customers..
Tells it like it is.
100% positive. I'd be looking for a new tuner - he has no idea what he is doing with GM based EFI systems if he makes that claim.
How big is the cam?Standard intake system except cold air intake and im going to hone the intake manifold and port match it although i really should do something to make it breathe better. Iv taken 20 thou off heads but will check valve to piston clearence before milling another 20 thou off, no idea what the ratio is ir will be though id say over 9:1
Reaper
Cam is huge, the outter extremes of street use really it was intended for a jet boat but iv got it now, power range between 3500-6400 revs
thanks, looking foward to your reply
Tells it like it is.
Then you might consider another manifold and will probably need more compression to make it work in addition to tuning your ecu.
Reaper
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