Re: how important to gasket match intake to head?
[Re: kielbasa]
#2089849
06/10/16 10:42 PM
06/10/16 10:42 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
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Posts: 9,225
Charleston
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Your reducing the size of the port. On a stroker...
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2089852
06/10/16 10:47 PM
06/10/16 10:47 PM
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Joined: Aug 2011
Posts: 2,860 Pattison Texas
CSK
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master
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Pattison Texas
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it is much better to have the port on the head a little bigger than the intake I say run it!!!!!
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: how important to gasket match intake to head?
[Re: CSK]
#2089965
06/11/16 01:53 AM
06/11/16 01:53 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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it is much better to have the port on the head a little bigger than the intake I say run it!!!!! Its called turbulence....I make them as smooth as possible on the match point..... use your gasket and match it to the larger of the two them cut on the other.. if the head is smaller.. blend the head about 1"in.. if the bowls havent been touched that is the biggest improvement.. my W-5s are a touch bigger on the bottom so I will be working on the intake tomorrow... its about .030 off on the bottom.. its due to using a different block.. the W-2s lined up perfect..... as they say.. a engine is a pump and the smoother the air gets in and out the better the pump is EDIT the tops and sides look great...maybe its only .020 but I will partially torque everything in place tomorrow to make sure
Last edited by MR_P_BODY; 06/11/16 01:58 AM.
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090030
06/11/16 08:55 AM
06/11/16 08:55 AM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
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Hi guys, am about to install my intake....super victor going on a small block stroker. The port on the head is larger vs the port on the intake, sooooo I'm thinking how necessary is it to match? If it was the other way around (manifold port larger than the head) I assume it would be an issue, but the way it is, maybe not so much? Thanks for any info! I hate to tell you this because the Super Victor is not a CHEAP intake but they kinda stink with-out some porting work. When I received one in a trade I was very disappointed the first time I stuck it on my flowbench for some testing. At the very least gasket match it.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: how important to gasket match intake to head?
[Re: AndyF]
#2090117
06/11/16 01:53 PM
06/11/16 01:53 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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I would think that the sharp dropoff (as is right now) would be far worse than the "cave" you spoke of that would be developed with matching em & on that I would go in far enough for as smooth tapered transition as possible. It'd cost an arm and a leg to farm it out but if you could do it your self I definitely would. EDIT if a person ain't never ported before I would highly suggest spending a few hours on a junk head just to get a basic feel for how it feels
Last edited by RapidRobert; 06/11/16 02:07 PM.
live every 24 hour block of time like it's your last day on earth
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Re: how important to gasket match intake to head?
[Re: RapidRobert]
#2090131
06/11/16 02:18 PM
06/11/16 02:18 PM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
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I've ported intakes for guys that race in classes that you are only allowed to (blend) into the port 1 inch and thrust me that takes some time. It sounds like you are not limited like this so trust me its worth doing. That intake stinks if untouched and the good old Victor beats it hands-down. One other thing to check out on the Super Victor. It sits MUCH higher and you may have to run valve cover spacers with some valve covers. Even with some grinding I had to so if the engine is out of the car check this out before installing. http://www.medicemfg.com/products_get.php?c=Valve%20Cover%20Spacers%20-%20Mopar
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090157
06/11/16 03:20 PM
06/11/16 03:20 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
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State of confusion
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I always gasket match/blend the manifolds to the heads and see no reason not to unless they look good as is and that's not very often.......
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090158
06/11/16 03:21 PM
06/11/16 03:21 PM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
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PA.
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Some intakes will give up 30-40 CFM when bolted on a set of heads. Just for an example I ported a set of Chevy Dart Platinum 215 heads for a good Friend. He didn't want to go with a bigger valve at the time so we ended up around 305 max flow so we bolted on his stock Victor Jr and with the intake installed the heads were now flowing 260 CFM. He told me to go ahead and port the Victor Jr but that he was still going to buy the 400.00 Dart intake. After I finished porting the Victor Jr we were only down 3-5 CFM with the intake on. Guess what, the Dart intake was down almost 35 CFM too so I ended up porting it later that year for him. Using the industry standard 35 CFM is approximately the equivalent of 70 horsepower.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: how important to gasket match intake to head?
[Re: mopar dave]
#2090270
06/11/16 07:24 PM
06/11/16 07:24 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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Mike at MRL Performance built a 470 awhile back using 440-1 iron heads non ported and a supervic intake. did not port match and the beast still made 730+hp And what would it have made if it was ported.. I never seen them loose power when match ported.. if your concern is version then the cam and headers are wrong
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090317
06/11/16 09:53 PM
06/11/16 09:53 PM
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Joined: Jan 2007
Posts: 8,039 Mt Morris Michigan
mopar dave
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Mt Morris Michigan
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i think whats more important and would give better results would be to port the intake as the intake needs to flow 20-30% more than your head intake port to prevent a bottle neck. IMO i dont think port matching 1" into the intake is worth much as you still would have a smaller port in your intake.
Last edited by mopar dave; 06/11/16 09:54 PM.
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090373
06/12/16 12:10 AM
06/12/16 12:10 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
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Posts: 9,225
Charleston
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On a particular intake for a GM. I do a $100 intake port job for alot of guys. Its a gasket match and i only work on 4 runners in the plenum. Its worth at a minimum of 15hp on stock short block engines. Every time. Its a nice after my real job extra money to spend on my toys
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090558
06/12/16 11:51 AM
06/12/16 11:51 AM
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Joined: Jul 2006
Posts: 9,366 Lehigh Acres, Florida
rickstershemi
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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? 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
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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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Joined: Jan 2007
Posts: 8,039 Mt Morris Michigan
mopar dave
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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.
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Re: how important to gasket match intake to head?
[Re: R3DART]
#2090679
06/12/16 03:25 PM
06/12/16 03:25 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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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.
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
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Re: how important to gasket match intake to head?
[Re: kielbasa]
#2090704
06/12/16 04:11 PM
06/12/16 04:11 PM
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Joined: Jan 2003
Posts: 31,034 Oregon
AndyF
I Win
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I Win
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Oregon
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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? 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.
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Re: how important to gasket match intake to head?
[Re: AndyF]
#2090706
06/12/16 04:19 PM
06/12/16 04:19 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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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? 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
Last edited by MR_P_BODY; 06/12/16 04:24 PM.
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