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Old 07-31-2008, 05:54 PM   #201
1989GTATransAm
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Re: Quest for a better flowing TPI

Yes it was done and the Votec TPI flowed around 235cfm on average. A little worse than the average Edelbrock TPI.
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Old 09-04-2008, 10:31 PM   #202
Mark A 91Formula
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Re: Quest for a better flowing TPI

Wish I was closer to you guys, Would love to see what this thing will flow when done...
Bought Mike Davis' old intake. Siamesed way out, notice the missing ridge on the top of the intake port. Even with a set of SLP runners there was quite a gap missing at the top, lol lost the pics but compare to a stock photo and you'd see what I mean, huge hole. I was told there would be a gap but damn it was a space big enough to fit my pinkey finger. Had a welder friend add ALOT of material to the top on the runner port. Gotta port match the runners to the intake now and further siamese out the runners.
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Old 09-04-2008, 11:52 PM   #203
1989GTATransAm
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Re: Quest for a better flowing TPI

Looks like maybe an inch or so of runner left in that intake manifold.
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Old 09-05-2008, 08:28 AM   #204
Mark A 91Formula
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Re: Quest for a better flowing TPI

Just measured it, 3" of runner left in the intake.
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Old 09-05-2008, 01:02 PM   #205
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Re: Quest for a better flowing TPI

Dam reading this whole thread, makes me want to sell my lt1 and get another camaro, this time no carb..... just good old tpi
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Old 09-19-2008, 03:11 PM   #206
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Re: Quest for a better flowing TPI

Finally getting around to making custom gaskets and start port matching the intake and runners. You can see just how much these puppies have been ported out.

Also have a question for the guru's On the floor of the ports there are 2 holes, they are in every port, well, every pair anyhow, are these something uncovered in porting and need to be filled, or are they supposed to be there?
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Old 09-19-2008, 03:43 PM   #207
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Re: Quest for a better flowing TPI

Yes they are supposed to be there.
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Old 09-23-2008, 03:12 AM   #208
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Re: Quest for a better flowing TPI

Those little holes are for the fuel from the cold start injector. They're necessary for an 85-88 engine and do nothing in an 89-92 engine.
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Old 10-28-2008, 01:47 AM   #209
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Re: Quest for a better flowing TPI

what size of throttle body are you using
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Old 10-28-2008, 11:45 AM   #210
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Re: Quest for a better flowing TPI

Quote:
Originally Posted by IrocZTPI View Post
what size of throttle body are you using
Most of us are using 52mm or larger. I personally have the 58mm from Summit. I think AZ. S&M has one with a monoblade that flows even more. At some point there are other areas of the air pattern that become more restrictive than the TB though.
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Old 11-05-2008, 02:21 PM   #211
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Re: Quest for a better flowing TPI

Did this thread die out with respect to trying the HSR intake? I am shooting for a setup that will pull to 6K rpms. What TPI manfiold (intake) is working the best for this?
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Old 11-05-2008, 06:35 PM   #212
1989GTATransAm
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Re: Quest for a better flowing TPI

The thread is concerned about "smog legal" intakes for California. The HSR is not smog legal in California.
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Old 11-07-2008, 02:36 PM   #213
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Re: Quest for a better flowing TPI

We didnt have a Stealth Ram available to us back in March/April when we did this testing. Also, that would require removing the intake manifold and breaking the seals and I didnt want to do that.

There's another sticky thread that compares the Stealth Ram to other intakes on an engine dyno. Read that one.
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