LS1 to Turbo 400
11-23-2008, 10:01 PM
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LS1 to Turbo 400 Im putting a turbo 400 behind my LS1 in an S-10. I bought the spacer I was told to use to take up the space differance but do I need a differant flexplate or will the stock one work. will the starter still engage the flexplate when its spaced out with the spacer or do I have to do something there. Last I dont have a torque converter yet and was wondering will a after market 35-4200 conv have the same bolt patter as the stock flexplate out of ls1 auto camaro or do I have to drill new holes ect.
Thanks for any help.
Thanks for any help.
11-23-2008, 10:12 PM
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I think I just found what I needed at the top of the forum but from what Im reading the spacer goes on the outside of the flexplate not in between the crank and flexplate thats why the starter still lines up. So im guesing Ill have to then shim the converter to the flexplate still to make up the space between the the 3 converter bolts and the flexplate?
Last edited by DTPerformance; 11-23-2008 at 10:29 PM.
11-23-2008, 11:02 PM
#3
Calling that part a spacer is a bit of a misnomer.
It doesn't space anything. It's more of an extension of the cup at the back of the crank.
The reason you need it is because LS1 converters have a longer crank pilot on the converter.
Theres not going to be any unusual space anywhere if it's all installed properly.
But do yourself a huge favor, before you put the trans up to the engine take the converter by itself and hold it up to the flexplate.
Make sure the converter pilot engages into the 'spacer' at least 1/8" before the converter bolt pads touch.
And just make sure everything else looks ok, bolt holes match, etc.
It doesn't space anything. It's more of an extension of the cup at the back of the crank.
The reason you need it is because LS1 converters have a longer crank pilot on the converter.
Theres not going to be any unusual space anywhere if it's all installed properly.
But do yourself a huge favor, before you put the trans up to the engine take the converter by itself and hold it up to the flexplate.
Make sure the converter pilot engages into the 'spacer' at least 1/8" before the converter bolt pads touch.
And just make sure everything else looks ok, bolt holes match, etc.
11-24-2008, 02:04 AM
#5
I made my own cooler lines, but I want to go to -6 lines with AN fittings and a better cooler when I have the trans gone through again.
I'm still using the stock shifter as well. If you use the stock shifter, you don't have to cut/splice any wires.
11-24-2008, 07:15 AM
#6
not sure what parts you have-the engines that had 4l80e's used a .400 spacer bet the flywheel and crank (flat flywheel) and longer bolts-this setup works for 350, 400, 700r, 4l80e trans
the "curved" flywheel uses a spacer, or adapter if you wanna call it that, bet the flywheel and converter for the above trans-there are converters also avail that use the curved flywheel and have a built in snout that doesnt need an adapter
seems the same starter is used for all-GM lists some diff starters, used to offer only rebuilt from the dealer-i bought a junkyard one, pulled it apart and greased it (important to make it spin faster)
so depending on the flywheel you use, what spacer you need-and donr forget to redrill (match up) converter bolt holes to the flywheel b4 install, easier to redrill off the car
i run the flat flywheel, with the .400 spacer bet the crank and flywheel and a turbo 400, no problems
the "curved" flywheel uses a spacer, or adapter if you wanna call it that, bet the flywheel and converter for the above trans-there are converters also avail that use the curved flywheel and have a built in snout that doesnt need an adapter
seems the same starter is used for all-GM lists some diff starters, used to offer only rebuilt from the dealer-i bought a junkyard one, pulled it apart and greased it (important to make it spin faster)
so depending on the flywheel you use, what spacer you need-and donr forget to redrill (match up) converter bolt holes to the flywheel b4 install, easier to redrill off the car
i run the flat flywheel, with the .400 spacer bet the crank and flywheel and a turbo 400, no problems
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11-24-2008, 10:50 AM
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Yes this is the one I have. So with this a normal th350-400 conv with bolt right up with the stock flexplate correct. only reason Im asking that is I dont have the conv yet.
11-24-2008, 10:56 AM
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not sure what parts you have-the engines that had 4l80e's used a .400 spacer bet the flywheel and crank (flat flywheel) and longer bolts-this setup works for 350, 400, 700r, 4l80e trans
the "curved" flywheel uses a spacer, or adapter if you wanna call it that, bet the flywheel and converter for the above trans-there are converters also avail that use the curved flywheel and have a built in snout that doesnt need an adapter
seems the same starter is used for all-GM lists some diff starters, used to offer only rebuilt from the dealer-i bought a junkyard one, pulled it apart and greased it (important to make it spin faster)
so depending on the flywheel you use, what spacer you need-and donr forget to redrill (match up) converter bolt holes to the flywheel b4 install, easier to redrill off the car
i run the flat flywheel, with the .400 spacer bet the crank and flywheel and a turbo 400, no problems
the "curved" flywheel uses a spacer, or adapter if you wanna call it that, bet the flywheel and converter for the above trans-there are converters also avail that use the curved flywheel and have a built in snout that doesnt need an adapter
seems the same starter is used for all-GM lists some diff starters, used to offer only rebuilt from the dealer-i bought a junkyard one, pulled it apart and greased it (important to make it spin faster)
so depending on the flywheel you use, what spacer you need-and donr forget to redrill (match up) converter bolt holes to the flywheel b4 install, easier to redrill off the car
i run the flat flywheel, with the .400 spacer bet the crank and flywheel and a turbo 400, no problems
Last edited by DTPerformance; 11-24-2008 at 11:31 AM.
11-24-2008, 11:35 AM
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I could but I already have the flywheel and the adapter so all I should need is a reg 350-400 conv I think and if that is the case theres alot out there used for good deals and changing differant stalls would be easy and cheaper to find for a reg 350-400
