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
Joined: Jun 2003
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: 2,864 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,864
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
Master
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Master
Joined: Jun 2003
Posts: 52,972
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: 20,185 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
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: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
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: 20,185 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
PA.
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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: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
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: 20,185 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
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
Master
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Master
Joined: Jun 2003
Posts: 52,972
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: 8,042 Mt Morris Michigan
mopar dave
master
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master
Joined: Jan 2007
Posts: 8,042
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
Joined: Jun 2003
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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