INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

408 compression ratio

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Old 11-05-2006, 02:03 PM
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Originally Posted by Stoichiometric
I am a little scared now, when the g80 let go what else did it take with it?
luckily nothing! Once you realize what to do when one side loses traction you can save it.............

https://www.performancetrucks.net/fo...d.php?t=327720
Old 11-05-2006, 02:35 PM
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Originally Posted by TurboBerserker
They aren't smaller. They are 4.03 or 4.04 as I recall.
I thought the stocker 6L MLS gaskets were like 4.005 or something, my calipers got bent otherwise I would go measure them real quick.

Either way with high boost every little bit counts IMO. I think your experience is like evreyone elses with pretty much anything, some get away with a shift kit 60e behind 500rwhp others(like me) kill a fully built one with 320rwhp.
Old 11-05-2006, 02:40 PM
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Originally Posted by Stoichiometric
That is some good advise. I have a lot to consider right now. Gas milage is not important to me, driveability means a little. I can put up with some stuff but I don't want to drive a race vehicle around on the street. I want to run large(er) turbos that can take advantage of my heads/intake, but I also want to make them as responsive as possible(of course I want to have everything ) by using the merge collectors . I care most about transient response when the truck is already rolling. I have 4.10 gears and was going to try to run the stock converter. I am not opposed to changing things down the road to optimize the set-up, I want to get going with the least modifications so I can choose them later on.
I wouldn't run the stock converter. Get a PI unit from FLT with a turbo stator in it. It will spool like crazy, but the rest of the time it acts like a low stall converter.

I made a decision to keep a smaller cam, and use boost to make power. That way I still get pretty decent daily driver manners, and lots of up until the cam runs out. I don't care about that though, I don't often hit 6+k rpms anyway (and my cam is good to the 6600s anyway). Just make sure you get a high lsa turbo cam, and that will actually help street manners. Oh, and when I was running 60 high z injectors I got around 9mpg (very much city driving though), that went up a bit with low-z 75s but one blip of the throttle killed any gains in mpg With the 95s I expect to become fast friends with the gas station owners...
Old 11-05-2006, 02:42 PM
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Originally Posted by 1slow01Z71
I thought the stocker 6L MLS gaskets were like 4.005 or something, my calipers got bent otherwise I would go measure them real quick.
If that is true, I didn't get stocker MLS, but I did use GM MLS. I don't remember the part number, but I did special order them from GM.
Old 11-05-2006, 03:59 PM
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Ever take it out on the highway? I wondering what I can expect, Im going straight to the 96s.
Old 11-05-2006, 04:06 PM
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Yeah with 75s I could hit the 17-18 mpg mark cruising at highway speeds (single session mind you).

I haven't fired it with the 96s yet
Old 11-05-2006, 09:25 PM
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I will give FLT a call and ask about that converter. I am resistant to running a higher stall because I already have 4.10 gears and relativly small tires. Will the truck still act kinda stock in low speed around town driving with the PI converter?

17-18mpg is better than I can get in my almost stock NA daily driver w/ 24lb injectors. LOL. It is a 3/4ton and has no tune though.
Old 11-06-2006, 08:33 AM
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Originally Posted by Stoichiometric
I will give FLT a call and ask about that converter. I am resistant to running a higher stall because I already have 4.10 gears and relativly small tires. Will the truck still act kinda stock in low speed around town driving with the PI converter?

17-18mpg is better than I can get in my almost stock NA daily driver w/ 24lb injectors. LOL. It is a 3/4ton and has no tune though.

The cool thing about the turbo stator is that your stall speed can be relatively low -- mine is 3k -- but you still get the benefits of a higher stall in terms of spooling.
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