AS&M 58mm Tb - Offset and Idle ????'s
#46
Re: AS&M 58mm Tb - Offset and Idle ????'s
Originally Posted by arnie
Actually Jon, I believe they ARE functioning adequately as intended/designed. They just were not designed for the LTx vehicle that you drive.
The above is how well (or not) the stock system works, with stock everything including TB and cam.
I agree the aftermarket TB makers could have done a better job in this area. I'm just saying it's not like you're throwing paint on the Mona Lisa or something as the factory IAC passage scheme doesn't work all that well anyway, so you aren't losing much. In my case it's unnoticable.
#47
Re: AS&M 58mm Tb - Offset and Idle ????'s
I looked closer at the intake and the TB, and now I can see exactly what you mean by the "IAC circuit"...I'll make something better to seal the TB to the IAC hole on the intake. Hopefully, once my engine setup is done, this should work flawlessly.
My only other question is...why would you need to drill a hole thru the TB and the IAC port? Some sites say you gotta do that. I'm thinking they are just trying to mimick the stock TB. It seems to me that, if you dill the hole, your bypassing the IAC function, having a designated air path to the intake. Drilling the hole makes air ALWAYS go thru, and not so much "controlled" by the IAC...
My only other question is...why would you need to drill a hole thru the TB and the IAC port? Some sites say you gotta do that. I'm thinking they are just trying to mimick the stock TB. It seems to me that, if you dill the hole, your bypassing the IAC function, having a designated air path to the intake. Drilling the hole makes air ALWAYS go thru, and not so much "controlled" by the IAC...
#48
Re: AS&M 58mm Tb - Offset and Idle ????'s
Originally Posted by sweetride45
My only other question is...why would you need to drill a hole thru the TB and the IAC port? Some sites say you gotta do that.
Originally Posted by sweetride45
I'm thinking they are just trying to mimick the stock TB. It seems to me that, if you dill the hole, your bypassing the IAC function, having a designated air path to the intake. Drilling the hole makes air ALWAYS go thru, and not so much "controlled" by the IAC...
Last edited by arnie; 03-26-2005 at 07:05 PM.
#49
Re: AS&M 58mm Tb - Offset and Idle ????'s
I'm not sure you know what hole I was talking about Arnie. I think I know the hole YOUR referring to, and I agree, both stock AND my AS&M have that hole.
http://web.camaross.com/forums/showt...light=IAC+hole
That link is a better reference I think. It's an additional hole that is drilled thru the front and back of the TB where the IAC passage is. It's about 3/32" in diameter.
Knowing what I'm referring to, is that what YOU were referring to? If not, do I need THAT hole as well?
http://web.camaross.com/forums/showt...light=IAC+hole
That link is a better reference I think. It's an additional hole that is drilled thru the front and back of the TB where the IAC passage is. It's about 3/32" in diameter.
Knowing what I'm referring to, is that what YOU were referring to? If not, do I need THAT hole as well?
#53
Re: AS&M 58mm Tb - Offset and Idle ????'s
Sounds good to ME! I have the holes ported now...once I get back around to it, I'm gonna fabricate a better way to make that "Connection"
Thanks to everyone!
Thanks to everyone!
#54
So I took the plunge and drilled out my AS&M 58mm TB earlier today. I used a .5 in copper pipe just like described earlier and sealed the hole I drilled from the TB to the port in intake. I could not be more please with the improvement in idle! My car had a terrible idle before this mod. This made a night and day difference.
One word of advice, when doing this mod use a trimmed GM gasket instead of an AS&M. The AS&M does not have the material in place to seal the copper tube to the intake the way the GM gasket does. Not sure if the metal to metal interface would leak with the AS&M, but after going through the trouble of everything else, why take the chance.
Thanks!
One word of advice, when doing this mod use a trimmed GM gasket instead of an AS&M. The AS&M does not have the material in place to seal the copper tube to the intake the way the GM gasket does. Not sure if the metal to metal interface would leak with the AS&M, but after going through the trouble of everything else, why take the chance.
Thanks!
#55
I used a 58mm Holley Gasket that worked PERFECT w/ some trimming...also, I didn't drill the bleed hole but made the copper connection and aluminum "seal" piece, and the thing works PERFECT...IAC is in the upper 30's mid 40's on idle and couldn't be better!
Thread
Thread Starter
Forum
Replies
Last Post
Henson071
Parts For Sale
8
12-30-2015 09:55 PM
C4m4roJoe
General 1967-2002 F-Body Tech
6
07-19-2015 10:59 PM