Mri for gasket matching - The 1947 - Present Chevrolet & GMC Truck Message Board Network

guitarornothin · 08-05-2004, 11:58 PM

I taped a Mri over the intake ports of my new Airgap intake , then I shoved my fishes nightlight up the hole.
Next you use a regular scraper razorblade and carefully cut out the ports. Next place over your intake ports of your heads and grind till they are exactly the same. Perfect!
Just hope somebody in the house is a gimp and has a stack of old MRI's to use.

meathead95 · 08-06-2004, 01:46 PM

ive seen people do that with intake manifold gaskets before but my question is how are you sure you are going to get them taped up in the exact spots on the heads

guitarornothin · 08-06-2004, 02:09 PM

to get it lined up PERFECT you use the bolt holes. i cut those out too...

and an MRI(those that dont know) is a Medical X-Ray. THOSE were of my back.

guitarornothin · 08-07-2004, 02:18 AM

why isnt anyone commenting on this..then...

TTT

bmg · 08-07-2004, 12:03 PM

why would you do it? Seems they would melt from the heat.

meathead95 · 08-07-2004, 02:37 PM

hes just using them as a template to get the intake/head ports identical more flow more power we used to do the same things on our dirt track cars but we used the gaskets for templates same difference as what he is doing it works great i just had my head in my a$$ when i responded the other day it must have been the mri papers that threw me off anyway ttt for yah

silvertonguedevil · 08-07-2004, 03:28 PM

I don't see why not. That should work out pretty good. That's port-matching at it's finest.

cdowns · 08-07-2004, 03:32 PM

looks like an extra unnecessory step to me i've always done it directly on the gaskets

jorgensensc · 08-07-2004, 03:30 PM

You just have to make sure youtransfer the same gasket with the correct (opposite)side to the intake as you had on the head. Had a buddy not pay attention and the intake and head didn't match at all.

Stroker · 08-07-2004, 10:52 PM

I like to think of it as port matching instead of gasket matching. I don't think the gasket manufactures give a lot of though to flow when they design a gasket although the gasket's port sizes are based on typical ports so they are close. Sometimes when using an aftermarket intake with stock heads the head needs a little work to open up the port. With larger port heads the intake runner can may need a little porting. Just don't get carried away and create a bellmouthed area which will kill the velocity in the middle of the port. You should try to keep the intake manifold openning about .050 larger than the head openning to allow for any misalignment during assembly. When the ports are finish then I check the gasket to be sure it doesn't extend into the port area and trim it with a razor if it does.

View Poll Results: Do you think its a good idea?
Yea	5	35.71%
No	1	7.14%
WHATS AN MRI?	8	57.14%
Voters: 14. You may not vote on this poll

08-05-2004, 11:58 PM	#1
guitarornothin RUNN over AGAIN!!! Join Date: Jun 2003 Location: Big Spring, Texas Posts: 505	Mri for gasket matching I taped a Mri over the intake ports of my new Airgap intake , then I shoved my fishes nightlight up the hole. Next you use a regular scraper razorblade and carefully cut out the ports. Next place over your intake ports of your heads and grind till they are exactly the same. Perfect! Just hope somebody in the house is a gimp and has a stack of old MRI's to use. Attached Images __________________ 67-72 TRUCKS ROCK 70 SWB shaved and a 72 front clip.and a poly tank. Peep mirrors and a BIG BLOCK 468 in the making. XNXNXNXNXNXNXNXNXNXNX ,/. EMAIL ME HERE!, Dont pm me please ,/.

08-06-2004, 01:46 PM	#2
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	ive seen people do that with intake manifold gaskets before but my question is how are you sure you are going to get them taped up in the exact spots on the heads __________________ 72 2wd blazer 72 swb 4x4

08-06-2004, 02:09 PM	#3
guitarornothin RUNN over AGAIN!!! Join Date: Jun 2003 Location: Big Spring, Texas Posts: 505	to get it lined up PERFECT you use the bolt holes. i cut those out too... and an MRI(those that dont know) is a Medical X-Ray. THOSE were of my back. __________________ 67-72 TRUCKS ROCK 70 SWB shaved and a 72 front clip.and a poly tank. Peep mirrors and a BIG BLOCK 468 in the making. XNXNXNXNXNXNXNXNXNXNX ,/. EMAIL ME HERE!, Dont pm me please ,/.

08-07-2004, 02:18 AM	#4
guitarornothin RUNN over AGAIN!!! Join Date: Jun 2003 Location: Big Spring, Texas Posts: 505	why isnt anyone commenting on this..then... TTT __________________ 67-72 TRUCKS ROCK 70 SWB shaved and a 72 front clip.and a poly tank. Peep mirrors and a BIG BLOCK 468 in the making. XNXNXNXNXNXNXNXNXNXNX ,/. EMAIL ME HERE!, Dont pm me please ,/.

08-07-2004, 12:03 PM	#5
bmg Registered User Join Date: Nov 2001 Location: Indianapolis, IN USA Posts: 157	why would you do it? Seems they would melt from the heat.

08-07-2004, 02:37 PM	#6
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	hes just using them as a template to get the intake/head ports identical more flow more power we used to do the same things on our dirt track cars but we used the gaskets for templates same difference as what he is doing it works great i just had my head in my a$$ when i responded the other day it must have been the mri papers that threw me off anyway ttt for yah __________________ 72 2wd blazer 72 swb 4x4

08-07-2004, 03:28 PM	#7
silvertonguedevil Senior Member Join Date: May 2004 Location: Seaside, Oregon Posts: 1,789	I don't see why not. That should work out pretty good. That's port-matching at it's finest. __________________ -Greg My Chevy trucks, past and present: 1962 C10 SB Fleetside 1964 C10 LB Fleetside BBW 1966 C10 SB Fleetside 1966 C10 SB Fleetside BBW 1968 C10 SB Fleetside 1971 C10 LB Fleetside 1971 C10 SB Fleetside 1972 C10 SB Fleetside Cheyenne 1972 C10 SB Fleetside Cheyenne Super 1972 C10 LB Fleetside Cheyenne Super 1974 C20 Cheyenne 1979 K5 Blazer Cheyenne 1982 K10 SB Fleetside Custom Deluxe 1982 K10 SB Fleetside Scottsdale 1986 C10 SB Fleetside Silverado 2008 Silverado 1500 4x4

08-07-2004, 03:32 PM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	looks like an extra unnecessory step to me i've always done it directly on the gaskets __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

08-07-2004, 03:30 PM	#9
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	You just have to make sure youtransfer the same gasket with the correct (opposite)side to the intake as you had on the head. Had a buddy not pay attention and the intake and head didn't match at all. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

08-07-2004, 10:52 PM	#10
Stroker Registered User Join Date: Mar 2001 Location: Moore, Ok Posts: 1,149	I like to think of it as port matching instead of gasket matching. I don't think the gasket manufactures give a lot of though to flow when they design a gasket although the gasket's port sizes are based on typical ports so they are close. Sometimes when using an aftermarket intake with stock heads the head needs a little work to open up the port. With larger port heads the intake runner can may need a little porting. Just don't get carried away and create a bellmouthed area which will kill the velocity in the middle of the port. You should try to keep the intake manifold openning about .050 larger than the head openning to allow for any misalignment during assembly. When the ports are finish then I check the gasket to be sure it doesn't extend into the port area and trim it with a razor if it does. __________________ 72 SWB parts and pieces Oklahoma



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