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aaron_sK
Member
Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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 Posted: Tue Sep 25, 2012 11:30 am Post subject: |
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| Dewey316 wrote: | | I wonder if it was setup with no IAC control, and if the iac passage is completly blocked and the butterfly completely closed, i could see it needing a hole that large to idle. |
Possibly, but if they had done that why would they have left that chrome idle solenoid hanging off the side of the TB?
Very strange choices were made by someone. |
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Dewey316
The Lama
Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech
1990 Chevrolet Camaro RS
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| Posted: Tue Sep 25, 2012 3:27 pm Post subject: |
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| aaron_sK wrote: | | Dewey316 wrote: | | I wonder if it was setup with no IAC control, and if the iac passage is completly blocked and the butterfly completely closed, i could see it needing a hole that large to idle. |
Possibly, but if they had done that why would they have left that chrome idle solenoid hanging off the side of the TB?
Very strange choices were made by someone. |
Maybe to keep the hole filled, but they didn't have an ECM able to control it. |
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iansane
Member
Joined: 16 Jan 2004
Posts: 5742
Location: Bothell
1991 Pontiac Trans Am
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| Posted: Tue Sep 25, 2012 8:25 pm Post subject: |
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| Dewey316 wrote: | | Maybe to keep the hole filled, but they didn't have an ECM able to control it. |
If it's an Indmar motor the ECM they use has IAC control.
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| Quote: | | Sometimes I actually think I'm slightly retarded in the mouth. |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Tue Sep 25, 2012 9:45 pm Post subject: |
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I've drilled two holes summing close to that size in a holley. My hsr and 58mm tb I put a longer throttle stop screw in rather than drilling, but it was long.
Besides, big hole, more closed throttle body.
In fact, I bet someone ran two breathers and no pcv.
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A redline a day keeps the carbon away! |
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RSFreak
The other "John"
Joined: 23 Jan 2004
Posts: 2946
Location: Renton
1989 Chevrolet Camaro RS
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| Posted: Sat Sep 29, 2012 4:17 pm Post subject: |
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| DBL_TKE wrote: | | RSFreak wrote: | Stealth Ram is better for less money.  |
Cost aside, how do you figure the HSR is "better?" |
Conventinal wisdom from those who have tried both (I almost hate to say this, but search TGO)  . The bigger plennum and longer runners would seem to be the most obvious reasons to me. The HSR also looks better, IMHO. |
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DBL_TKE
Member
Joined: 28 Feb 2007
Posts: 1505
Location: Aloha, OR
1991 Chevrolet Camaro Z/28
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| Posted: Sun Sep 30, 2012 8:31 pm Post subject: |
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Oh I have been searching. There wasn't too much, if any, info regarding comparisons. I still can't find anything about the plenum volume though. I have found someone who claimed to have flow tested one to 276CFM@28". And I found that the runner length is 5.75" long. And I also found this Dyno graph comparing a vortec headed TPI to a vortec/ramjet, same cam.
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