Turbo (TH) 400 to LS1 (Gen 3)

Maurie Fuller · Forum Junkie

Turbo (TH) 400 to LS1 (Gen 3)

dan · Forum Junkie

Try Cliff Hills over here at Clifford Automatic Transmissions here in Perth. Made his name over the years specialising in Torque Convertors.

08 9328 6822

Azteck · In rehab

Maurie, I have a torque converter to do just this, give me a call or email.

Maurie Fuller · Forum Junkie

Aaron (AZTECK)
This will be a great help to me and I will buy the torque converter from you, I will ring.
Regards
Maurie

Wolf · Rehab Dropout...

Hey Maurie, dont suppose this is for you 'vette?

Maurie Fuller · Forum Junkie

Yes WOLF it is for the vette, new aushocks all round and a Gen 3. Maybe I need a younger driver!! just get the vette finished, then work out who drives. Class 4 no Navigator.
I am retired, so it is full time in the workshop.

Wolf · Rehab Dropout...

Maurie Fuller wrote:

...just get the vette finished, then work out who drives. Class 4 no Navigator.
I am retired, so it is full time in the workshop. ...

so are you looking for volunteers????!!!! haha!

kuster · In rehab

Hey guys, i`m in th same boat. I need to mate a LS2 Chev to Turbo 400. What is rquired?

Cheers
Mike

Maurie Fuller · Forum Junkie

Mike,
I can only assume the LS1 and LS2 have the same bolt patten. With the LS1 only 5 of the bolts can be used. The 4 on the horizontal each side of the dowells and one at the top.
Aaron McClintock made a clamp for his, to take in the top bolt hole which does not exist on the TH400.
The yanks say that this is plenty of bolts for up to 700hp.
I have made my own bolt through engine mounts and have kept them well forward so the weight of the engine is positive at the top.
The torque converter.
The bolt patten does not match by 1/2 a hole but a chain saw file fixes this.
Then the crankshaft locating spigot does not reach the TH400 torque converter so,
If you were in the US of A you would just buy a special torque converter (TCI Street fighter)
which matches the TH400 to LS1/2 or longer flex bolts in a kit that has an extension flange that goes on the flex plate (GM part no 12551367 , 12563532, and 12563533 which do not exist from Holden) or in OZ a cut and shut of the 2 converters.
Aaron sold me a cut and shut that he previously used.(Dont forget the 1 mil clearance)
In US of A you can buy the TH400 housing that has all of the bolt holes.
My opinion on high stall is why would you waste 1000rpm of brute torque. I will run the standard stall. All of the above is hipothetical as I have not run mine yet!!!!
Maurie

car568 · In rehab

TCI Products are available from VPW .

kuster · In rehab

Thanks for the info guys..... Not planning on running a big stall if any at this stage. But putting a cam in the engine so may have to run some stall to get off the line a bit harder and get to the first corner first at stadiums..... lol

car568 · In rehab

I would recommend running a mimimum of 2000RPM stall even with a relativly stock motor, it helps with launching and drive out of corners and if your running a spool/locker of any kind it will make the car easier to drive.

The higher stall will help keep you final drive ratio sensible as well, as you will get the launch you need with out having to run to low a gear ratio.

Example: standard stall - 4.88:1 with a 2K - 2.5K stall you would run a 4.54:1 (Caveat, of course your stall may need to be higher depending on how aggressive your cam is)

Thats just my 2 cents worth.

-- Edited by car568 at 10:30, 2008-02-14

bert5 · Powerhouse Poster

Mike,
I just got a TH400 converter made up with hd internals, about 2000 stall and bolts straight up to the ls1 flex plate without spacers or filing. Cost $660 from torque converter technologies 03 95741499
Cheers Bert smile

kuster · In rehab

Cheers for the help guys, i will be looking into the contacts that you guys have supplied. Custom converter it is, i am getting the specs on the cam at the moment, so will be able to work out the stall then. But by the sounds of it, it will be between 2500 and 2800 rpm.

car568 · In rehab

One thing ot be mindful of is the bigger the stall the more heat it will generate.

slayer · Regular Poster

just rev the sucker,it will only heat up if you put around

kuster · In rehab

we had a trans temp issue with chris`s truck (pro 440) then we fitted a bigger tranny cooler with twin fans and shrouds and now it runs fine with a 2800 stall. So we think we will have that sorted on my truck....