LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

New heads on 100k engine

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Old 02-07-2007, 05:34 PM
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New heads on 100k engine

I just installed a supercharger and would love to make the car as fast as possible without blowing it up. I see Trick Flow sell heads made for supercharged car. The manifold has the dreaded rear leak so would this be a good time to change the heads also? Is this good or will i end up with an engine that will have problems? Has anyone done this and how did it go.
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Old 02-07-2007, 06:39 PM
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You're already pushing it w/ the blower. The intake manifold is a 2 hour project.. swapping the heads, is not.
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Old 02-07-2007, 07:05 PM
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Originally Posted by Javier97Z28
You're already pushing it w/ the blower. The intake manifold is a 2 hour project.. swapping the heads, is not.
2 hour job? you must have done it a few times eh, i would guess more than double that for the first time
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Old 02-07-2007, 11:03 PM
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Originally Posted by zx1216
2 hour job? you must have done it a few times eh, i would guess more than double that for the first time
Not really. Its very straightforward. I had mine off in about an hour
my first time.

The blower should be alright ONLY with low boost (i.e. 4-6 psi) and a spot on tune. If you want to do heads and cam however, go for it. I did my heads/cam swap at 94,000 miles. Runs great.

Last edited by CamaroBoy96Z28; 02-07-2007 at 11:05 PM.
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Old 02-07-2007, 11:13 PM
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i would say go for it.
If u blow it up - rebuild bigger and better
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Old 02-07-2007, 11:17 PM
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They will lower your compression so it might not be a bad idea...
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Old 02-07-2007, 11:37 PM
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Originally Posted by CamaroBoy96Z28
Not really. Its very straightforward. I had mine off in about an hour
my first time.

The blower should be alright ONLY with low boost (i.e. 4-6 psi) and a spot on tune. If you want to do heads and cam however, go for it. I did my heads/cam swap at 94,000 miles. Runs great.
I suppose i shouldn't have said guess, i've done it before and it seamed like it took longer, maybe i was being extra careful labeling everything and making sure it was all spotless before removing the manifold.
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Old 02-08-2007, 07:12 AM
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Originally Posted by zx1216
I suppose i shouldn't have said guess, i've done it before and it seamed like it took longer, maybe i was being extra careful labeling everything and making sure it was all spotless before removing the manifold.
Yah, I've done it a bunch of times during heads/cam installs, motor builds, and a bunch of cam installs. I have all the connections in the car pretty much memorized so I just yank it all out and put it all back in w/ no worries.

Always gets done right/clean with no issues or leaks.
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Old 02-08-2007, 08:22 AM
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Originally Posted by Javier97Z28
I have all the connections in the car pretty much memorized so I just yank it all out and put it all back in w/ no worries.
Pretty easy to do since all connections have a dedicated fit (other than the numbered injector connectors of course).
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Old 02-08-2007, 08:39 AM
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Originally Posted by SS RRR
Pretty easy to do since all connections have a dedicated fit (other than the numbered injector connectors of course).
Agreed, although many people still choose to label everything not realizing you can't really mix it up. I guess I was also including vaccum connections, etc.

In any case, like I said, it's an easy job in comparison to swapping heads w/ the motor in the car (not so much that it's not easy, just a real pain in the ***)
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Old 02-08-2007, 09:10 AM
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As mentioned above, those heads will drop the compression a tad which might not be a bad thing for a forced induction application. However, with a 100K on the clock, I personally would be more inclined to set aside whatever extra funds towards a stout replacement shortblock and worry about better heads down the road.
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