[HaloMedic]

Well after some time the exhaust port has burned thru the gasket on the intake,
I did a search here to see if I could find others who have changed this. would like to know what gasket is best for the Edelbrock RPM changing out the Performer, Engine is a 455 6x8 milled to 96cc
In the search I did find a post suggesting the Mr Gasket 502G I guess this one did have a metal disc plate to block off the exhaust port but did a search w/summit and it doesent come with the block off plates any more
I have in Inventory
1 set of Victor Reinz Pontiac455 Intake manifold Gasket MS15186
1 set of Fel-Pro Federal Mogul MS90205

Guess im asking wait to find the MG502G or use one i have, and can a delete plate be made to block off the exhaust port on the head

Thanks

[HaloMedic]

Well its apart must have been sipping a few, yes the intake was tightned down but never tourqued the bolts were not at 40ft/lbs at all no wonder it blew thru

[GT182]

Put some miles on it and recheck the intake bolt's torque again. The first 2 bolts each side of mine loosened up on my intake and sucked antifreeze thru the cyclinders. You don't want that happening either.

[HaloMedic]

Thanks for the advice Gary

[johnta1]

Are you still going to block the cross-over off?
Some have used a thin putty knife.
Cut the blade so it covers the hole.

Possibly when the intake was 1st put on they pulled the intake to the timing cover and didn't finish tightening the bolts after that?

Have had some also loosen from just running.
(gasket thicker than stock possibly?)

[HaloMedic]

Been thinking of some thin sheet metal to block off,

and it was me who made the error not tourquing it down I did the rebuild, I think what i did was duplicate the tourque value of 15ft/lbs that was used on the waterpump bolt and just tightend the rest @15ft/lbs and not 40

I was thinking the Victor reinz gasket due it is thicker then the fel-pro so i should get a good seal

[GT182]

Mike use stainless steel, if you can, to block off the cross-over holes. You won't have to worry about SS rusting out.

[HaloMedic]

Exactly what effect does blocking the exhaust port,
also the gaskets were a very bad match to the intake ports and as you know the Victor Rienz gasket is a covered metal gasket so about a half hours work with a dremal I got them to match.

[johnta1]

Here in Florida, you don't need it.
It's basically for cold weather starts and runnability.
(cooler air intake with it blocked)

[HaloMedic]

Thanks john I was thinking more on that and i knew it was there to heat up the choke element but never thought of the cooling effect on the intake, makes sence,

Gary did go with some stainless to block off the ports, thanks for the insight on the rust thru over time issue, that could have lead to Engine failure given the wrong circumstances, (Larger piece breaking off)

Button it up today reset timing and idle , wow I thought i was going to lose a bit of the bottom end tourque but the tires broke free with ease have 60s in the rear w 3:23,

All said I like it opened up a few ponies from what I had with the Performer

Feathered the throttle after the take off to get the tires to bite but still did a good 60 ft burn out nice little spin after 2nd and a chirp into 3rd was doing about 90 didnt go up to a 100 going into forth as my tach is on the center console and was unable to see rpm, but in know it will thats so much fun.