I’m finally doing something with my SII. The block is 267ci, not sure of the compression but was in a fast car (around 8sec) so probably low. I was going to run some aluminum champion style heads because I want to drive this car a lot, daily if possible, and think they’ll be better on the street. Then I got to thinking, since I have the room, why not try to run the huge SII heads? Car is tubbed, sorta pro street, and really would like to use the bigger heads. Will be using 4L80E transmission. Since I’m assuming the compression is in the 8s, and with the big heads, it might be too doggy. Can a well designed cam, proper converter stall, and rear gearing be combined so I’ll enjoy driving it daily? Thanks.
Can I make Stage II heads run on the street?
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Get in touch with Mr Spool , He has a stage II car with the stage II heads . The right turbo will make a world of difference in spool & responsiveness .
Dynoman,
Thanks. Since I have your attention, and anyone else - how about a Lenco manual behind the SII? I checked the prices of a well built 4L80E, and will be comparable to Lenco. I prefer to row my own, and should take care of having to select proper TC lockup and whatever and maybe be better for lag. Just not sure about spooling turbo without a load on the tranny. Not a real fan of all the levers, so if another type of regular manual can work would be good to know.
Best regards.
John
Thanks. Since I have your attention, and anyone else - how about a Lenco manual behind the SII? I checked the prices of a well built 4L80E, and will be comparable to Lenco. I prefer to row my own, and should take care of having to select proper TC lockup and whatever and maybe be better for lag. Just not sure about spooling turbo without a load on the tranny. Not a real fan of all the levers, so if another type of regular manual can work would be good to know.
Best regards.
John
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I've only heard of one guy on here putting a manual trans in a Turbo Buick and it was a few years ago , check out T56 swap .
The main thing that has changed is turbo technology , as in the instant spool of Comp Hubless turbos . Like I said before contact or PM Mr Spool as he has been racing / street racing since the early 90's and has run or worked on just about any combo you can think of . Click on this thread .
The main thing that has changed is turbo technology , as in the instant spool of Comp Hubless turbos . Like I said before contact or PM Mr Spool as he has been racing / street racing since the early 90's and has run or worked on just about any combo you can think of . Click on this thread .
Time for a break in the norm in the trans section. I searched and couldn't find where anyone had done a manual trans swap in GN with the v6. Lots of people have asked in the past, but were advised against it. I guess I like a challenge. I'm thinking this is going to make my car a bit more fun to drive. 
This may not be the best route if you have a big turbo on a small motor or a factory computer. But for my car with a 277" motor and a 6768 with XFI, it will work fine. Should be a ZR1, Z06, GT500, Hellcat crushing monster with 900+ hp on tap.
So, what does it take.
You need a...
This may not be the best route if you have a big turbo on a small motor or a factory computer. But for my car with a 277" motor and a 6768 with XFI, it will work fine. Should be a ZR1, Z06, GT500, Hellcat crushing monster with 900+ hp on tap.
So, what does it take.
You need a...
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There have been a few guys over the years that have done it and it's not a problem.
Go with a roller cam in the 220 range and let it rev. For street use, yes absolutely get the correct converter. HPT or Comp can set you up with a crazy responsive turbo that will work on the street, especially in an 8 to 1 CR motor.
If you are willing to spend Lenco money, I would suggest a well built 200 from Husek or Lonnie Diers and you will save over a Lenco. Instead of a Lenco maybe try a sequential 6 speed built with a fun lever, the best of both worlds. Whatever you do, get something with overdrive for the street. Helps a lot
Running the motor on E85 will help with response across the board.
Go with a roller cam in the 220 range and let it rev. For street use, yes absolutely get the correct converter. HPT or Comp can set you up with a crazy responsive turbo that will work on the street, especially in an 8 to 1 CR motor.
If you are willing to spend Lenco money, I would suggest a well built 200 from Husek or Lonnie Diers and you will save over a Lenco. Instead of a Lenco maybe try a sequential 6 speed built with a fun lever, the best of both worlds. Whatever you do, get something with overdrive for the street. Helps a lot
Running the motor on E85 will help with response across the board.
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