Close up photos of Summit 58mm TB.
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Joined: Jun 2002
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From: LakeLand, Florida
Close up photos of Summit 58mm TB.
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Joined: Feb 2004
Posts: 4,800
In the third picture it shows the IAC circuit is not isolated and the IAC bypass hole not drilled. Many of you will not care but some of us have found that keeping that isolated and piped into the seperate hole in the intake and drilling the IAC bypass in aftermarket TBs to improve idle.
With that gap around the blades I wonder if it will whistle? I would also say if you drill the IAC bypass start small because of that.
Let us know how it works once you get it installed, would be great if you could check TPS signal.
With that gap around the blades I wonder if it will whistle? I would also say if you drill the IAC bypass start small because of that.
Let us know how it works once you get it installed, would be great if you could check TPS signal.
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Joined: May 2003
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I thought about the Summit piece but went with the Edelbrock since it had the throttle shaft bearings .vs the bushings Summit offered.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
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Joined: Aug 2006
Posts: 3,705
From: Kansas
I thought about the Summit piece but went with the Edelbrock since it had the throttle shaft bearings .vs the bushings Summit offered.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
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Joined: Apr 2004
Posts: 1,013
From: dalton Ga.
I thought about the Summit piece but went with the Edelbrock since it had the throttle shaft bearings .vs the bushings Summit offered.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
I would like to be 1st in the stupid line.
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Joined: May 2003
Posts: 192
Start paying attention to AVERAGE HP and TQ values. These will better represent a well running engine. On a 350cid rig running less than a 7K rpm limit then a proper cam in the slightly less than 230 range will probably provide the best overall average results. As an example, if you compare average HP/TQ for an LT4/Hotcam .vs an LT1/CC306 you may be surprised that their average numbers are nearly identical (the Hotcam is actually a bit better). The intangibles are rear gears, number of ratios and weight. But in a stock geared vehicle I'd bet on the Hotcam combo every time. It's all area under the curve.
Peak numbers don't show the true picture.
Also, I don't have any pics of my TB but you should be able to find a few on the net. Also look for stuff on the BBK version. It's nice but needs some mods to "really" work well.
Disclaimer: I'm running an LE2 heads/cam combo. It's alright but I think the LE2 cam is a better match with a 383.
Last edited by Dan Parker '96; Feb 14, 2007 at 01:33 PM.
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Joined: Dec 2004
Posts: 968
From: Wichita, KS
I thought about the Summit piece but went with the Edelbrock since it had the throttle shaft bearings .vs the bushings Summit offered.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
The Edelbrock also offered the advantage of a direct fit without having to modify the idle air circuit as with the BBK unit. Cast .vs billet makes no difference.
For those of you who are running a 350ci engine on the street with less than a 230/230 combo (which you should be if you are halfway smart) then you should look up David Koldos either here or on the www.corvetteforum.com (in the C4 Tech area). He does a fabulous 52mm (from stock) piece for a reasonable price.
I'll be 4th in the stupid line then.
Last edited by Colin91Z; Feb 14, 2007 at 10:27 AM.
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Posts: 2,182
From: Moore OK
5th? Dunno I'm too stupid to keep track.
We just comparing averages across the board? Or are we integrating the whole curve, because I would be interested in comparing areas of a motor that stops making power 1k+ rpms less.
Let us know if there are any improvements with the new unit, I think it may be my next mod.
We just comparing averages across the board? Or are we integrating the whole curve, because I would be interested in comparing areas of a motor that stops making power 1k+ rpms less.
Let us know if there are any improvements with the new unit, I think it may be my next mod.