Quick tuning tips
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
Quick tuning tips
I know this should be in the tuning section, but I very rarely get a good reply there, and I know there are some good tuners that hang around here.
I just got my spare engine put back together, stock 350, iron heads, 58mm tb, 230/236 on a 114 cam. everything else is stock. I'm running an accel DFI Gen7 with a dual sync distributor (rear mount).
The problem that I'm having is that i've got to crack the TB blades a little to get the car to idle properly. But when I push the gas just off idle to come off a stop sign the car starts to die.
If I push the break and then the throttle then let off the break to go from a stop it works just fine. Or if I have rolling momentum I seem to be fine.
Is there an easy way of tuning this out? What should I start playing with to fix it? I've never been too good at tuning so I'm hoping to learn something from all of this. Thanks.
I just got my spare engine put back together, stock 350, iron heads, 58mm tb, 230/236 on a 114 cam. everything else is stock. I'm running an accel DFI Gen7 with a dual sync distributor (rear mount).
The problem that I'm having is that i've got to crack the TB blades a little to get the car to idle properly. But when I push the gas just off idle to come off a stop sign the car starts to die.
If I push the break and then the throttle then let off the break to go from a stop it works just fine. Or if I have rolling momentum I seem to be fine.
Is there an easy way of tuning this out? What should I start playing with to fix it? I've never been too good at tuning so I'm hoping to learn something from all of this. Thanks.
Le Mans Master
Joined: May 1999
Posts: 6,513
Likes: 1,301
From: Windermere FL
Sounds like your IAC is either malfunctioning or needs to be reset. Not sure what year you have, but here is the procedure to try first:
https://www.corvetteforum.com/techti...D=94&TopicID=2
https://www.corvetteforum.com/techti...D=94&TopicID=2
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 3,293
Likes: 79
From: Jackson MI
its not my IAC. I had a guy tune my car with this cam when it was a 393ci and he had to drill holes in the TB plates to get it to idle right. I've since had the holes repaired and need to crack the plates to get enough air to get the big cam to idle.
Besides I had this TB setup on my old engine a month ago and everything worked fine on it, smaller cam that's why we had to fix the TB plates otherwise there was too much of a vaccuum leak.
Its definately a tuning issue, I'm going to try and add some extra timing to the idle and see if that helps.
Besides I had this TB setup on my old engine a month ago and everything worked fine on it, smaller cam that's why we had to fix the TB plates otherwise there was too much of a vaccuum leak.
Its definately a tuning issue, I'm going to try and add some extra timing to the idle and see if that helps.
