Removing TB: anything I should be aware of?
09-28-2008, 11:28 AM
#44
Sorry to bring this one back up, but I wanted to add something that I found out recently.
On my 2000 Camaro SS, about a year ago, I swapped in a camshaft.
In the meantime, while waiting to get tuned, I tried drilling the throttle blade to get the car to hold an idle. It helped, but did indeed cause a few issues when trying to tune the car. But when all was said and done, car idled well, and ran 11.60-11.70's naturally aspirated.
Fast forward to about 7 months ago...
I ported the stock throttle body myself, and also inverted the throttle blade stop screw, for no real reason other than I had the TB off the car. I rarely drive the car, so any problems that arise are sometimes are hard to detect, or figure out.
A few drives in the car later, and idle started hanging up for apparently no reason. After several re-flashes (I have HPTuners for car and truck and sometimes get advice from an LS1tech sponsor), the hanging idle, and cam surge, would ALWAYS return to show it's ugly head.
I put up a thread: https://ls1tech.com/forums/showthread.php?t=989390
My logged IAC counts were very low and on a whim, and after a very basic answer to my thread, I re-installed the throttle blade screw and idle is rock solid like it was back before I inverted the screw.
It seems that due to me drilling the throttle blade hole out and the inverted screw not allowing a closed enough setting, the car's idle was both hanging up until stopping, and surging when stopped or idling around. It was getting "too much" air and I couldn't "tune" that out, no matter what I tried.
Just wanted to share...
BTW, Saturday at work I was bored, so I finally ported the truck's throttle body too. Actually turned out better than the one on my car, so I'll re-do that one soon. Anyway, truck idles great and as expected, surely is more responsive to throttle changes.
Thusfar, there hasn't been a need to make any tune changes for it either. Still strongly opinionated that it's one of the best bang for the buck mods out there...For me, doing it myself, it's a no-brainer.
Free Mods for the win!
On my 2000 Camaro SS, about a year ago, I swapped in a camshaft.
In the meantime, while waiting to get tuned, I tried drilling the throttle blade to get the car to hold an idle. It helped, but did indeed cause a few issues when trying to tune the car. But when all was said and done, car idled well, and ran 11.60-11.70's naturally aspirated.
Fast forward to about 7 months ago...
I ported the stock throttle body myself, and also inverted the throttle blade stop screw, for no real reason other than I had the TB off the car. I rarely drive the car, so any problems that arise are sometimes are hard to detect, or figure out.
A few drives in the car later, and idle started hanging up for apparently no reason. After several re-flashes (I have HPTuners for car and truck and sometimes get advice from an LS1tech sponsor), the hanging idle, and cam surge, would ALWAYS return to show it's ugly head.
I put up a thread: https://ls1tech.com/forums/showthread.php?t=989390
My logged IAC counts were very low and on a whim, and after a very basic answer to my thread, I re-installed the throttle blade screw and idle is rock solid like it was back before I inverted the screw.
It seems that due to me drilling the throttle blade hole out and the inverted screw not allowing a closed enough setting, the car's idle was both hanging up until stopping, and surging when stopped or idling around. It was getting "too much" air and I couldn't "tune" that out, no matter what I tried.
Just wanted to share...
BTW, Saturday at work I was bored, so I finally ported the truck's throttle body too. Actually turned out better than the one on my car, so I'll re-do that one soon. Anyway, truck idles great and as expected, surely is more responsive to throttle changes.
Thusfar, there hasn't been a need to make any tune changes for it either. Still strongly opinionated that it's one of the best bang for the buck mods out there...For me, doing it myself, it's a no-brainer. Free Mods for the win!
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