tb gasket stacking updated - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-22-2006, 02:05 PM   #11
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Nobody makes an L27 spacer.
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Old 12-23-2006, 07:14 AM   #12
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its 508 central time and i havent been able to get to sleep all night so im ganna start on it now. ill be back before noon and tell you weither you were right and ill drained my oil or i was too darn stubborn and made it work
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Old 12-23-2006, 07:23 PM   #13
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TB spacers are worthless on the L27.

Stop the coolant flow at the LIM if you're going to do it at all.
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Old 12-23-2006, 10:20 PM   #14
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well i took the blue rubbe off on one side filled the slot with silicone, put it on the other unharmed gasket let it dry, melted them together with a sodering gun, did the same thing with a third one.

smoothed it out with sand paper and put it on. ran a wee bit stronger. second gear hit a lil harder mainly. no collant leaks yet and i drove it about 60 miles so i dont think its ganna leak. i melted the crap out of um to get um together
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Old 12-23-2006, 11:27 PM   #15
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Did you notice the comments that you shouldn't do this? And you would gain more with a properly made intake BEFORE the TB?

You are taking a GREAT risk here with that coolant. Is your engine worth the risk? Is the gain (which was mostly mental and not real) worth the risk?
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Old 12-24-2006, 01:03 AM   #16
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Just like everyone else here, I woud strongly encourage you to go back to a single gasket.
If you really want to work that angle, you could go to any local machine shop and have them machine a spacer for you. It'* just a flat plate with a few holes in the right places. A competent hand with a cad program and a CNC machine could run one up in about an hour. Shouldn't cost you too much, and with the regular gasket on either side, your risk of a failure would be just about nil.
Truthfully, though, you won't get any gain out of it unless you already have a good intake before the TB.
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Old 12-24-2006, 01:05 AM   #17
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The intake will gain, the spacer will not. With an intake, the spacer is cancelled out.

This isn't a TB injected application. We're multi-port.
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Old 12-24-2006, 01:22 AM   #18
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Quote:
Originally Posted by willwren
The intake will gain, the spacer will not. With an intake, the spacer is cancelled out.

This isn't a TB injected application. We're multi-port.
Good point.
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Old 12-29-2006, 04:24 PM   #19
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I have a spacer on my Sonoma, it added about 1-2mpg (less than the 4 it said). I didn't feel any performance gains, but its a truck so who cares anyway.

BTW- It wasn't a stack of gaskets I melted together either, it was aluminum LMAO
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Old 12-29-2006, 04:39 PM   #20
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I put one on my 93 4.3 and my 95 Suburban, but both were TB injected. Not multi-port.

Let'* seperate the comparisons here to make sense of it. Developing higher TB velocity from a spacer will benefit TB injected vehicles. His L27 won't benefit from it.
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