does port matching the lt1 head do any good?
Thread Starter
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Joined: Aug 2007
Posts: 746
From: Bennett N.C.
who said port matching the head and intake doesnt help?
stock untouched ports on the heads and whats left of the intake
the intake was bolted up to the head
I'm gonna say yes port matching does help
Last edited by slowride94z; Apr 15, 2009 at 07:44 PM. Reason: Im gona get it right sometime
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Joined: Oct 2002
Posts: 969
From: Arkansas
Yes I agree.
I actually have a highly modded LT1 intake and when I put the LT1 intake on the stock LT1 heads I noticed a little bit of material hanging out.
If you really want to help that LT1 intake jack knife the runner and make the intake runners on the intake as parrallel as possible (not much taper)
I actually have a highly modded LT1 intake and when I put the LT1 intake on the stock LT1 heads I noticed a little bit of material hanging out.
If you really want to help that LT1 intake jack knife the runner and make the intake runners on the intake as parrallel as possible (not much taper)
Thread Starter
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From: Bennett N.C.
in two of the pictures you can see the outline of the intake gasket on the head
I couldn't believe how bad these things lined up
an new intake gasket is what I will use to match the ports
I couldn't believe how bad these things lined up
an new intake gasket is what I will use to match the ports
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Joined: Aug 2005
Posts: 4,405
From: Kantuckee Yo'
Air flow, flows best in a straight line. If you port match the LT1 then you end up with less of a stright line at the push rod pinch. You get a path where air has to go more around the pinch which becomes counter productive. When porting heads, this has to be taken into account. The top, bottom and NON PRP side can be easily cleaned up to remove the obstruction with good porting.
Lloyd Elliot does not reccomend port maching the heads and does not do it on the heads he ports. He removes the obstructions through actual porting of the intake ports.
Good pics and discussion BTW.
Lloyd Elliot does not reccomend port maching the heads and does not do it on the heads he ports. He removes the obstructions through actual porting of the intake ports.
Good pics and discussion BTW.
Last edited by wrd1972; Apr 11, 2009 at 07:56 PM.
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From: Arkansas
If you dont mind, post some more pics of that roofless intake.
Here is mine from a couple of weeks ago, more progess now.
IMO I would make the transition from head to intake non existent. The air should not know where the intake/head starts or ends
.
Thread Starter
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Posts: 746
From: Bennett N.C.
Lloyd Elliot does not recommend port matching the heads and does not do it on the heads he ports. He removes the obstructions through actual porting of the intake ports.
I don't think this is correct, why make the hole bigger on the intake ? then hit a wall at the head
Good pics and discussion BTW.
no one in their right mind is gonna tell me that this ledge is good
Yes. It's a bit of a safety factor against slight misalignment. Just 20 thou or so is what many people (myself included) do when port matching a manifold. Gives a little anti-reversion, which is good, and prevents the manifold being larger than the port, which is very, very bad.
Rich
Rich
Well, if the manifold is bigger than the port in the head, that's a bad situation where a lot of power can be lost. Most people actually like to leave the a lip on the manifold that is 0.020-0.030" smaller than the port to help prevent reversion and to surely avoid the opposite situation (a lip on the head protruding into the port) which screws up airflow.
Rich
Rich
hope these guys dont mind me steeling their quotes
I took the pictures just because someone on here said gasket matching the head to the intake didnt help
Last edited by slowride94z; Apr 15, 2009 at 07:42 PM.
Thread Starter
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From: Bennett N.C.
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If the intake in the head is larger then that of the manifold then no problem. Same with the exhaust side, the hole larger in the manifold then in the head, then no problem. When you have it the opposite way then you have restriction which in most cases is a problem. As far as turbulance, I understand that it is not a bad thing as it keeps the fuel from falling out of the mix. IMO
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From: The Wild West
Not to stir the pot, but I'd like to hear some more information on this. I was talking with Lloyd about this the other day and I was thinking about porting the intake myself. Obviously the only problem would be putting the "lid" back on the intake.
Also looks like you could make your own "air gap" style intake, kinda like this https://www.camaroz28.com/forums/sho...intake+porting
So, discuss
-Dustin-
Also looks like you could make your own "air gap" style intake, kinda like this https://www.camaroz28.com/forums/sho...intake+porting
So, discuss
-Dustin-
Last edited by Bersaglieri; Aug 5, 2009 at 05:05 AM.
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"Lloyd Elliot does not reccomend port maching the heads and does not do it on the heads he ports. He removes the obstructions through actual porting of the intake ports."
I would agree. Getting the cross sectional area correct is the right approach. Some of you are mis-stating what Lloyd said. He does remove the obstructions.
I would agree. Getting the cross sectional area correct is the right approach. Some of you are mis-stating what Lloyd said. He does remove the obstructions.