Intake manifold heat?

[art leong]

Originally Posted by SSDiv6

It does not look like Teflon. Take the temp readings and post them.

After a few of minutes at idle the intake runners were 105 degrees the head next to the intake manifold was 108. As the head got hotter the runners the runners got hotter to.
I didn't have the temp gun before but I think the runners stayed cooler longer, till they eventually heat soaked.

[SSDiv6]

Originally Posted by art leong

After a few of minutes at idle the intake runners were 105 degrees the head next to the intake manifold was 108. As the head got hotter the runners the runners got hotter to.
I didn't have the temp gun before but I think the runners stayed cooler longer, till they eventually heat soaked.

It may be too thin; the spacer looks more for a street/OEM application and it may need to be thicker for your application.
Just make your own heat spacer from a thick sheet of Black Nylon 66.

[art leong]

Originally Posted by SSDiv6

It may be too thin; the spacer looks more for a street/OEM application and it may need to be thicker for your application.
Just make your own heat spacer from a thick sheet of Black Nylon 66.

The spacer is about .300 thick. How thick is the Black Nylon 66?

[SSDiv6]

Originally Posted by art leong

The spacer is about .300 thick. How thick is the Black Nylon 66?

It's available in many thicknesses.

http://tridentplastics.thomasnet.com...eet?&forward=1

[Redlight]

Thinking out loud:

Timing ?

Reversion?

[art leong]

Originally Posted by Redlight

Thinking out loud:

Timing ?

Reversion?

Pulled the motor to check the bearings. didn't mess with the timing belt at all.
Timing light is in the trailer. I'll go get it on Tuesday and double check it but it starts easy and idles great.
As far as reversion goes. This is a different cam (much bigger) than last year. I haven't paid attention to the manifold heat this year. Each time out I've been heating the engine, to allow heat soaking. I'm finally going to a track without eyes. So I want to know what I can pick up with a cold intake.
Took a leakdown to see if I had some bent intake valves It was 3 to 5 percent (not bad for gasported pistons).
This is the motor that I had asked about the compression pressure before It is 300 pounds. I worried myself sick about it. But have just learned to live with it as a quirk with the 4 valve setup.

[SSDiv6]

Originally Posted by art leong

Pulled the motor to check the bearings. didn't mess with the timing belt at all.
Timing light is in the trailer. I'll go get it on Tuesday and double check it but it starts easy and idles great.
As far as reversion goes. This is a different cam (much bigger) than last year. I haven't paid attention to the manifold heat this year. Each time out I've been heating the engine, to allow heat soaking. I'm finally going to a track without eyes. So I want to know what I can pick up with a cold intake.
Took a leakdown to see if I had some bent intake valves It was 3 to 5 percent (not bad for gasported pistons).
This is the motor that I had asked about the compression pressure before It is 300 pounds. I worried myself sick about it. But have just learned to live with it as a quirk with the 4 valve setup.

Art, I do not think your timing is off and if you have a reversion problem, it not not create heat. You need an isolator made of thicker material such as phenolic, Black Nylon 66 or similar high temperature thermoplastic. I have not seen your intake location, however, is the intake above the exhaust?