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Re: how important to gasket match intake to head? [Re: kielbasa] #2090487
06/12/16 08:17 AM
06/12/16 08:17 AM
Joined: Jan 2003
Posts: 516
,Pa.
68dodge Offline
mopar
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,Pa.
I did this on my 71 Scamp and gained a .10 on my time slips.

Re: how important to gasket match intake to head? [Re: kielbasa] #2090530
06/12/16 10:43 AM
06/12/16 10:43 AM
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Posts: 353
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kielbasa Offline OP
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after sleeping on this, maybe the question needs to be rephrased...
i think we can all agree any port alignment mismatch would obviously need to be corrected. in my case, the ports match up fine, just that the head port is larger than runners, which means that just matching them, at the point of gasket may be useless?? I assume in this case the entire runners all the way to the plenum would need to be matched - do people do that?? is that what porting the intake means?

Re: how important to gasket match intake to head? [Re: kielbasa] #2090558
06/12/16 11:51 AM
06/12/16 11:51 AM
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi Offline
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Lehigh Acres, Florida
Originally Posted By kielbasa
after sleeping on this, maybe the question needs to be rephrased...
i think we can all agree any port alignment mismatch would obviously need to be corrected. in my case, the ports match up fine, just that the head port is larger than runners, which means that just matching them, at the point of gasket may be useless?? I assume in this case the entire runners all the way to the plenum would need to be matched - do people do that?? is that what porting the intake means?


on my 408 the J-Heads were hogged out pretty large on both the intake and exhaust side....my tunnel ram ports were considerably smaller....asked my engine builder if I should match them and his response was to leave them as is....he liked the idea of the smaller opening keeping the velocity higher on this particular build....so I did and it ended up making 475HP which was 25HP more than I was shooting for....Very Happy.

I did match the carb to intake......

Rickster

Re: how important to gasket match intake to head? [Re: kielbasa] #2090589
06/12/16 12:44 PM
06/12/16 12:44 PM
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Posts: 7,614
Mt Morris Michigan
mopar dave Offline
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Mt Morris Michigan
from what i'v seen its usually the roof of the intake port that's worked on. I had Ryan J port a indy intake for me yrs ago. most of the work was under the carb pad on the turns, but the roof of those ports were worked on as well which would make the ports larger. that indy 360 intake flowed 350cfm on avg.

Last edited by mopar dave; 06/12/16 12:45 PM.
Re: how important to gasket match intake to head? [Re: kielbasa] #2090649
06/12/16 02:33 PM
06/12/16 02:33 PM
Joined: Feb 2007
Posts: 205
Edmonton Alberta, Canada
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Don't mean to hijack, but seems relevant so....on this topic, I have an unported w2 pro dominator (thanks Moar Dave)
I would like to use this intake with my 360-1 245 cnc heads.
I am currently running a port matched Indy 360-3 intake and a Davinci dominator.
Do you guys think I would see any gains by switching to the unported unmatched pro dominator? Assuming it was set up properly of course.

Combo is;

468 ci
12.54-1
Bullet solid roller
360-1 245 rp cnc
727
8" ultimate convertor (5400 stall)
3:91 gear
3000 lb a-body.
Pump gas street strip car.

Re: how important to gasket match intake to head? [Re: R3DART] #2090679
06/12/16 03:25 PM
06/12/16 03:25 PM
Joined: Jun 2003
Posts: 52,968
Romeo MI
MR_P_BODY Offline
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Posts: 52,968
Romeo MI
Originally Posted By R3DART
Don't mean to hijack, but seems relevant so....on this topic, I have an unported w2 pro dominator (thanks Moar Dave)
I would like to use this intake with my 360-1 245 cnc heads.
I am currently running a port matched Indy 360-3 intake and a Davinci dominator.
Do you guys think I would see any gains by switching to the unported unmatched pro dominator? Assuming it was set up properly of course.

Combo is;

468 ci
12.54-1
Bullet solid roller
360-1 245 rp cnc
727
8" ultimate convertor (5400 stall)
3:91 gear
3000 lb a-body.
Pump gas street strip car.



I doubt it.. if I recall the indy has a larger plenum
which you need for those cubes... you might want to add
a 2" spacer under the carb and see if it picks up for you
wave

Re: how important to gasket match intake to head? [Re: kielbasa] #2090704
06/12/16 04:11 PM
06/12/16 04:11 PM
Joined: Jan 2003
Posts: 29,974
Oregon
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AndyF Offline
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Posts: 29,974
Oregon
Originally Posted By kielbasa
after sleeping on this, maybe the question needs to be rephrased...
i think we can all agree any port alignment mismatch would obviously need to be corrected. in my case, the ports match up fine, just that the head port is larger than runners, which means that just matching them, at the point of gasket may be useless?? I assume in this case the entire runners all the way to the plenum would need to be matched - do people do that?? is that what porting the intake means?


You're in the right track. Some people "bellmouth" the intake so it matches the head. That is probably close to useless. Hughes Engines offers what they call a deep port match where they go a couple of inches back into the intake and match to the gasket. It costs a few hundred dollars for that type of work. Wilson Manifolds will take it a few steps past that with full runner porting as well as plenum porting. A full competition port job from Wilson on an intake manifold is usually more than $1000.

Re: how important to gasket match intake to head? [Re: AndyF] #2090706
06/12/16 04:19 PM
06/12/16 04:19 PM
Joined: Jun 2003
Posts: 52,968
Romeo MI
MR_P_BODY Offline
Master
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Joined: Jun 2003
Posts: 52,968
Romeo MI
Originally Posted By AndyF
Originally Posted By kielbasa
after sleeping on this, maybe the question needs to be rephrased...
i think we can all agree any port alignment mismatch would obviously need to be corrected. in my case, the ports match up fine, just that the head port is larger than runners, which means that just matching them, at the point of gasket may be useless?? I assume in this case the entire runners all the way to the plenum would need to be matched - do people do that?? is that what porting the intake means?


You're in the right track. Some people "bellmouth" the intake so it matches the head. That is probably close to useless. Hughes Engines offers what they call a deep port match where they go a couple of inches back into the intake and match to the gasket. It costs a few hundred dollars for that type of work. Wilson Manifolds will take it a few steps past that with full runner porting as well as plenum porting. A full competition port job from Wilson on an intake manifold is usually more than $1000.


I do the full intake runner and plenum if needed..
but I do my own stuff so its just time... but when I
was working I would take my stuff into the head lab
and have them checked and get an ideas that the guys
could offer... and that came to the intakes also..
even on a few times I had the head and intake flowed
as a package... the port match makes a difference..
as you said some of the companies will only go a inch
or so into the runner or port(on the cheapo jobs)
EDIT
I try to keep the same taper if its decent(there is a
formula for the taper but I forget what it is right now)
and if that taper is correct I try to keep it and just
clean the runners) but if its off I try to get it correct
wave

Last edited by MR_P_BODY; 06/12/16 04:24 PM.
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