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| LS2 + 6T75 Build (Page 2/24) |
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dratts
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OCT 22, 11:09 AM
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Hope it works for you. I've looked at the 6T75 too. Are there any upgrades available like there are to the 4T65 due mostly to GMs racing program?
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MstangsBware
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OCT 22, 11:53 AM
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| quote | Originally posted by darkhorizon:
My TBSS has a LS2 in it.
Also, the 6T75 trans will probably not run with an aftermarket controller. |
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There was a company a few years back working on a BETA version controller for this trans...Unsure if they ever completed this or not....
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Raydar
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OCT 22, 02:22 PM
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Looking forward to this! ------------------
Raydar
88 Formula IMSA Fastback. 4.9, NVG T550
 
Praise the Lowered!
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infinitewill
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OCT 22, 02:40 PM
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. [This message has been edited by infinitewill (edited 01-05-2016).]
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Dan86GT
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OCT 22, 08:14 PM
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| quote |
Also, if it's from a Trailblazer SS, I guess it's probably the LQ9 (iron block) engine, insead of an LS2 (assuming the SS didn't have a real LS2 swapped in, but it looks like you have the truck intake turned around backwards there). What is the casting number on your heads? Did it come with the LS4 cover/pan already installed?
If you're anywhere reasonably close to Newport News, I hope you make it to the Fall Clasic show at Newport News Park today. You can see a couple of LS376/480 swaps, and chat with some of us about various V8 swap details.  |
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Count me in for the Fall Classic next year (hopefully with a functioning 6T75...). The block is aluminum. I will post casting numbers on Monday so we can take a look at exactly what I have. I have an LS4 as a donor engine. I swapped the cover and pan, but I may be changing the pan based on what people are suggesting. The intake in the picture I think is actually from a LS6. It is just on there for mockup. Not sure what will be there when it runs.
As for the trans controller I think I am ok....... I am an engineer at Powertrain Control Solutions (PCS). We make the controller for countless engine-swapped Fieros (Don Kraus' monster has one). We have been developing a controller for the new 6 speed automatics for quite some time. Before we can release the 6T70/75 controller to the aftermarket we want to be 100% sure that we have a solution that the average car guy can use. A big piece of the puzzle with this trans is torque management. So we needed a project that was a powerful engine coupled to a transverse transmission.......Fiero - of course! I decided to chronicle the build on the forum so I could get your real-time feedback and make sure we are on the right path.
This transmission is probably going to be shredded with the power from a stock LS2 without proper torque management. I am not going to initially do anything to the engine. Once we have everything working, I will worry about cam, heads, etc.
I hope also that since the control issue will be overcome, the aftermarket will make some performance parts to make these trans stronger. I plan on documenting everything here so we will all see what breaks first on the trans. In the end I hope that anyone can grab this modern 6-speed trans and have some fun.
We'll see....
Dan
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dobey
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OCT 22, 08:52 PM
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Ah, OK. So you're way up North of Richmond.
Sorry, yeah, you guys are right. It is an LS2, but with truck intake and different oil pan it seems. And it also seems like a lot of TB SSes got the #799 heads instead of the #243. Though, there are also a lot of reports of this happening on 07 MY LS2 Vettes built in 09/2006 and 10/2006. Bit odd, that, since the #799 were typically used on the iron truck motors. Of course the Trailblazer is a bit of an oddball in that area it seems.
Anyway, I hope you get a solution working soon for the 6 speed auto transmissions.
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Formula88
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OCT 22, 09:41 PM
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That is so cool that you're using a Fiero to develop new hot rod hardware! Looking forward to seeing this swap take shape.
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Niterrorz
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OCT 22, 09:51 PM
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ive been lookin forward to someone trying a 6T75 tranny as its very compact for an automatic and should be able to hold mucho hp/tq. ill be watching this build thread closely.
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darkhorizon
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OCT 23, 01:50 AM
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| quote | Originally posted by Dan86GT:
This transmission is probably going to be shredded with the power from a stock LS2 without proper torque management. I am not going to initially do anything to the engine. Once we have everything working, I will worry about cam, heads, etc.
I hope also that since the control issue will be overcome, the aftermarket will make some performance parts to make these trans stronger. I plan on documenting everything here so we will all see what breaks first on the trans. In the end I hope that anyone can grab this modern 6-speed trans and have some fun.
We'll see....
Dan
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Unless you forsee this trans being significantly weaker than a 4t65e.. you will not have any problems.
I ran with MUCH more power than a LS2 on a stock 4t65e with only a bit of torque management in place for years without issues on a stock trans.
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qwikgta
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OCT 23, 10:16 AM
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Glad to see another LS engined Fiero in the Commonwealth. Maybe the VAFA club can take a road trip up to see your build. Update you thead often and take lots of pics
Rob
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88 Coupe, CJB T-TOP, LS376 and a GT clip
http://www.youtube.com/watch?v=QAH9yjw6XR0[This message has been edited by qwikgta (edited 06-21-2015).]
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