First Intake Install?
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Naturally aspirated, about 3-4 mph gain in the 1/4 from stock, to ported or siamesed. The aftermarket intake base was only useful because it could be ported to a 1205 port, and the runner ports opened up a little. And that was more of an average. Car ran about 96-97MPH with the stock
intake, right around 100-101mph. Infact, I think the fastest timeslip was 101.23MPH on a cold october night.
With the blower, ZERO gain. Stock, Stock ported, Aftermarket, siamesed ported, and I even had a set of DIY welded up runners.
Either way the car ran 110 mph with the blower. every pass.
The combo BTW was a comp 503 cam, 9:1, iron heads. The cam was
considered the 'biggest you should go with TPI'.
So now with the blower on it, we add a holley dominator manifold which I converted to EFI. I milled up an adapter bracket to run a vortec monoblade throttle body off a 4.3l truck. We're not talking anything amazing here. 1205 ports - just like the ported TPI. Car ran 119-120mph every pass.
Took the blower off, car ran 106 mph w/ just a K&N air filter.
I had a good friend of mine, who parallel to me did a lot of testing with a similar cam, TPI, ported TPI, then a converted LT1 manifold with similar gains.
-- Joe
intake, right around 100-101mph. Infact, I think the fastest timeslip was 101.23MPH on a cold october night.
With the blower, ZERO gain. Stock, Stock ported, Aftermarket, siamesed ported, and I even had a set of DIY welded up runners.
Either way the car ran 110 mph with the blower. every pass.
The combo BTW was a comp 503 cam, 9:1, iron heads. The cam was
considered the 'biggest you should go with TPI'.
So now with the blower on it, we add a holley dominator manifold which I converted to EFI. I milled up an adapter bracket to run a vortec monoblade throttle body off a 4.3l truck. We're not talking anything amazing here. 1205 ports - just like the ported TPI. Car ran 119-120mph every pass.
Took the blower off, car ran 106 mph w/ just a K&N air filter.
I had a good friend of mine, who parallel to me did a lot of testing with a similar cam, TPI, ported TPI, then a converted LT1 manifold with similar gains.
-- Joe
A good read, thanks!
Pro
Joined: Mar 2007
Posts: 526
Likes: 1
From: San Angelo Texas
Man, the hostility! Glad the moderator stepped in.
Well, I just hope those of us who bought it like it. I just wish I could install mine. I got to sit here and wait until I go home again. Thanks to all the guys installing theirs themselves and keeping the rest of us posted.
I ask a question to Ken at FIRST. He said the system will bolt up to the GM fast-burn heads. He said the most you would have to do is file down some ridge on the base manifold where it might hit the heads just below the valve covers. Not sure what he is talking about but it makes me wonder. I would really like to run fast-burns.
While I'm at it, what head would someone run with this intake? I'm going to be upgrading my motor piece by piece and it will eventually end up a 383 in final form.
Well, I just hope those of us who bought it like it. I just wish I could install mine. I got to sit here and wait until I go home again. Thanks to all the guys installing theirs themselves and keeping the rest of us posted.
I ask a question to Ken at FIRST. He said the system will bolt up to the GM fast-burn heads. He said the most you would have to do is file down some ridge on the base manifold where it might hit the heads just below the valve covers. Not sure what he is talking about but it makes me wonder. I would really like to run fast-burns.
While I'm at it, what head would someone run with this intake? I'm going to be upgrading my motor piece by piece and it will eventually end up a 383 in final form.
