427's engine trouble

36 " Bennett's, plenty big enough. The upgrade rocker was worth it for auto - retract.

Hello Gravy!
I sure is good and able to have the boat home on the lot that I have and so good to see it every day now we have 50cm snow but once I start working on denvi to weld and replace the plates on the bottom I'll send in some pictures

ok, it might snow so late in the season, I thought that your winter is over now. I was planning what to do on our boat this year shall start in the late april

I remember on LBCs there was a metal plate (thin tin) that went over the gasket material facing the head. On SBCs there was a tin plate with & without a Small hole that would restrict or block the exhaust x-over ports, captured and help in place by the gasket.
If your gasket is the typical paper gasket, your missing a piece. If it's a synthetic gasket, it may be good to go.
OR, does the new intake manifold even have the x-port? No worries then.
,rc

This is the "bees knees" fix: Edelbrock 2105 Edelbrock Performer Manifolds for Ford

Make sure you get the non-EGR one, which doesn't have the exhaust crossover. I don't know why they call it EGR, since it's not, but that's Edelbrock's terminology.

If you want to just plug the hole, I have used tin but it only seems to last a few years. The gasket material itself, minus a metal plate, will blow out in no time. It sounds like you got the non-EGR style gasket.

If you don't want to buy the aluminum intake (25 lbs vs 85 for the original cast iron one!), I'd recommend cutting out the gasket material around the crossover port, leaving 1/8" or so all around. Then get thin stainless stock (butter knife or thickness guages work well) and trim them to fit the hole you cut in the gasket. Use high temp silicone to seal it up.

Good luck!

Are we water skiing yet?

Don't use an aluminum intake on a raw water cooled motor in saltwater, it will live a very short life......

Hi,

I would think that the EGR stands for Exhaust Gas Recirculation.

This system sounds like it is used to provide a hit spot in the inlet manifold below the carbs so in an automotive app when you stab the gas pedal and a het if liquid fuel is blasted down the throat having this hit spit helps with the vaporisation of the liquid fuel.

A lot if engines had a system to do this.


I remember seeing a few straight six engines that had a metal plate between the inlet and exhaust manifold, the latter being attached to the former by four longish bolts.

This plate had a gasket on either side that should have been replaced anytime major work was done on the engine - they were known as "hotspot gaskets "

Good point, Capt J. I figured since he's in Michigan that wouldn't be an issue either way, but somebody on the coast could read the article and have trouble.

Kiwi, I always thought it was odd that Edelbrock uses the term non-EGR for the version that doesn't have a crossover. There's nothing EGR about it, but hey...I figure it's their manifold.

So, gravy, which repair route did you use on the manifold? New aluminum, used iron or the SS shim?

I've seen gasoline aluminum intake manifolds (for chevy vortech motors and others), that have bronze water passages in them. I had one from PCM on the 350 vortech I had in a 18' Donzi classic a decade ago.