Intake gasket question

[pinellas50]

Is this the correct style lower intake gasket?

I saw a pic of lower gaskets in a thread recently that had all of the cylinder ports isolated. But the ones pictured, the same style I have on my truck, have one big hole on each side that doesn't seperate the runners between two cylinders on each side.

The pic I saw got me thinking........

 

[Windedv6]

Re: Intake gasket question

Probably makes them easier to blow out under boost, because of the long 'span'. A 'connected' gasket will have some support to keep the sides from blowing out.

You don't easily blow out the gasket between these two runners because you have equal pressure on both sides. Both runners are loaded. For that matter it is not going to effect performance that one would be able to measure.

On a sequencial firing setup you may get some cross fuel dirtying up the neighboring runner, but on our bank-to-bank batch fire setup we have dirty intakes anyway.

John

 

[pinellas50]

Re: Intake gasket question

On a sequencial firing setup you may get some cross fuel dirtying up the neighboring runner, but on our bank-to-bank batch fire setup we have dirty intakes anyway.

John

This is exactly along the lines of what I was thinking. That one cylinder could take some of the fuel from the other with it being batch fire. So one cylinder would be rich and one would be lean.

I would just like to know if this in fact the correct style gasket that people here are using with no problems.

 

[pinellas50]

Re: Intake gasket question

110 views and no one else has ever replaced lower intake gaskets? We're still talking SyTy's here right? :lol:

 

[syclone0209]

Re: Intake gasket question

it looks correcto for the stock and maybe l35 heads. the divider between the ports is recessed and not machined flat for a gasket to sit on, unlike a vortec. look at the pic on post #6 of this thread and you can see it.

http://www.syty.net/forums/showthread.php?t=50962&highlight=l35+pic

 

[syclone0209]

Re: Intake gasket question

heres a vortec

 

[midnightbluS10]

Re: Intake gasket question

I think the Victor Reinz gaskets have all of the ports seperated.

I believe you can still get them from Tucker Auto Parts. PN: MS16154

 

[syclone0209]

Re: Intake gasket question

but if you put it on without anything to hold down that strip in between the ports your going to suck it into the cylinder.

 

[Don W.]

Re: Intake gasket question

FWIW I found one of these blown on my motor:

http://www.syty.net/forums/showthread.php?t=50844&highlight=found

The repair using gaskets pictured lasted over a year and was perfect when taken apart for my rebuild. My thought is when installed correctly meaning proper torque and tightening sequence they will work fine. :2cents: Up to 20# boost anyway.:lol:

 

[Don W.]

Re: Intake gasket question

A PITA to re-check the torque, but maybe I will.

Back in the day it was SOP to re-torque. I think you might pull off doing the Sy if you ran it without the IC and all the other things that bolt in the way long enough to warm up and do the re-torque then add everything back and forget it.

 

[pinellas50]

Re: Intake gasket question

I just found that SyTyPerformance.com also shows the same style gasket as I pictured.

http://www.sytyperformance.com/inde...facturer_id=0&option=com_virtuemart&Itemid=26

So I guess I won't worry about that one. From Don's pic, I see what you mean about the runner between the close ports being recessed syclone0209.

Thanks everyone. I have just been thinking outside the box trying to figure out my higher rpm vibration. The batch fire injection vs 2 cylinders on each side that share, potentially, the same air and fuel, got me thinking. I guess that's another idea I can scratch off the list.