Brendan

I am looking for a cheap TC upgrade for my Turbo GTA. I've got a stock 700-R4 TC from an f-body right now. It's been stalling at 1600rpm and I can't build anymore boost than 0psi without spinning the tires. The Corvette's TC stalls higher and I believe it's closer to the stall of the TC used in the TTA. What year converter should I look for and what stall should I expect? Any ideas?
~Brendan

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1988 Turbo GTA Trans Am - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

It's still under construction but:
http://turbogta.homestead.com/main.html

JOEYZ28

I've got a "B" stall(or Corvette)conv. in my 350 truck and I am about to put one behind a 383 in my '85Z. They are advertised as 2050 RPM stall and that jives with my tach. I get mine from a local tranny parts distributor here in Mobile but I would think you can get them other places too. They run about $120 or so for the heavy duty model. I've bought 3 or 4 for different projects and never had one fail, but i recommend getting one that came from a good rebuilder B/C there's alot of junk rebuilts out there. If you need any other info or the part #'s you can e-mail me at botiejoe@aol.com and I'll find one of the boxes.

Marc 85Z28

iTrader: (3)

I believe 85 was the best year, stalling around 2300-2400 rpm.

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1985 Z28, Jasper Class 1 350, Edelbrock Performer intake, Dual snorkel air cleaner, K&N, Edelbrock headers, Catco 3" cat, Hooker 3" cat-back, Richmond 3.73's, Transgo shift kit, JET Stage 2 chip, Hypertech coil, Lakewood LCA's, Powertrax locker, SSM subframes, Centerline Auto Drag's

Brendan

I thought all the 4th gen Corvette's had the same stall. What about a TC from a later model 4th gen f-body? Anyone have any other suggestions? I would think that the later model f-body's and Corvette's, especially the LS1 cars, would have higher stall TC.
~Brendan

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1988 Turbo GTA Trans Am - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

It's still under construction but:
http://turbogta.homestead.com/main.html

zippy

late model LS1's have a very low stall. same with the LT1's. from the records i show the grand national actually had a higher stall than the tta, but not sure why. highest i've seen for the 700r4 trans is the L35 engine tc, but the hurst olds, gn, and monte carlo ss's had 2400 stall converter. all using the 2004r trans. i could be incorrect on this, but it is just the records i am showing.

bjankuski

This is a reply to a post that I asked about torque convertors, it may help you pick the correct convertor.

BJ,
If you can remove the inspection cover and find the four-digit alpha code decal on the converter installed in the donor car, you should be able to determine wheter it will fit or not.

The converters should physically interchange. If the first letter in the code is a 'D' and the fourth (last) character is an 'F' or 'G' it should fit.

The cutoff for transmission design changes was the 1984½ model, where the input shaft spline was changed among other internal items.

Just for a grin, the second character denotes the converter design stall PRM as follows (K factor is the factory designation for stall speed range):

K = K-85, 1,211 RPM
G = K-100, 1,397 RPM
F = K-110, 1,611 RPM
E = K-115, 1,654 RPM
B = K-140, 2,025 RPM

Finding a 'B' in that position would be pretty cool, eh?

Later,
Vader

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"Stop it - or we'll go blind!

89gta383

iTrader: (5)

I saw a post on the corvetteforum that said that 1985 had the best stall of all the convertors, and that with the right motor, you could get it to stall around 2500-2600. Do a search or post a question over there.

RobO

ck out http://w3.one.net/~rcheek/impala/faq...nverter%2Ehtml

Very good stuff including part #s

Rob_O

Brendan

Thanks for everyones help. I think I'm going to go with a newer S10 (RPO L35) torque converter. They go for about $150 from the dealer plus core; not bad. It's a new K-140 unit very similar to the '85-'86 Corvette one.

89gta383: How's your Trans Am these days? You been back to Ennis lately? Thanks for you help.
~Brendan

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1988 Turbo GTA Trans Am - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

It's still under construction but:
http://turbogta.homestead.com/main.html

89gta383

iTrader: (5)

Brendan, good to see that you got the turbo conversion going. Too bad I'm not in Dallas anymore. I'm in Nashville now. Having fuel problems, car is starving on the top end, and I think I will have Ed Wright richen up the injectors a bit. Make sure you help get Jason's car running good once you are done with yours.

89ROC

LOL...my car IS running good. Taking it Denton this Friday. Shooting for the 7's this time (holding breath).

BTW I just received my Edelbrock water pump today....putting it on tomarrow.


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89' Iroc-Z
ZZ3 short block-355 TPI ZZ9 cam
NOS 150 shot.
blah...blah...blah..
95' T-56, 6-speed
99' Z' rearend w/ 4.10's

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The crazy fool racer of the UNfamous SW crew.


[This message has been edited by 89ROC (edited July 25, 2000).]

Brendan

89gta383: What are you doing in Nashville? Is it the extra elevation that's cause your top end fuel lean out. The turbo set up seems to be running pretty good.

89ROC: How's your car? I'm not burning off oil anymore, bad valve cover gasket; no more white smoke. This thing flies now that I've got a custom chip for it. It's got an actual exhaust system now too; very, very quiet. We should run them.
~Brendan

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1988 Turbo Trans Am GTA - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"
http://turbogta.homestead.com/main.html

[This message has been edited by Brendan (edited July 26, 2000).]

89gta383

iTrader: (5)

I never said your car wasn't running good. You've got a lot more power in that car than you think, but you've got to tune it first. Your car can hit 7's on motor with the right combo. Maybe Brendan can help, it's always better having two heads than one. I'm going to the dyno shop today now that my fuel problem is solved, and I'll let you know what happens.

Dude, where's my 8mm wrench?



[This message has been edited by 89gta383 (edited July 26, 2000).]

MrJ

Are you sure about this? The computer at my local Chevy dealer listed the L35 S10 converter at $275 plus core.

TTA850

I know you have a 700R4 and not the 200 but why not look into the PI Vigilante converters.Everyone I know that is useing them say they're great and they make em for the 700.Downside is the one I would get(3200 stall multidisc lockup)cost like a grand,but they have cheaper ones that don't have the multidisc feature(or lockup at all).

Steve

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TTA#850,bone stock,best 13.68@100
TTA#861,near stock,best 12.15@112.95
89 GTA,nowhere near stock,soon to be low 10's

Ray87Z

You could also snag a Darrel Young 2200-2400 rpm unit. $199. I installed one of those awhile back and have been very happy w/ it. I can stall it up to at least 2200rpm without much trouble, and it will flash higher. I frankly haven't tried to see exactly how high it will go without spinning by pushing it, so I stress the at least part. My stocker was killing me w/ what appeared to be sub 1500 rpm stalls, so it is much better w/ the Darrel Young unit. Sounds like your stocker is doing something similar to you.

Let me see if I can remember the website.

www.racing-transmissions.com

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited July 26, 2000).]

Brendan

TTA850: Price is the key at this point. I through all my money into the engine swap so finding a cheap but good quality replacement is what I'd like to do. I would love to get a Precision torque converter but I can't afford it. Maybe down the road. I wish I had a 200-4R in there sometimes. I could've put a stock TTA TC in it.

Ray87Z: I guess Darrel Young kind of slipped my mind. What about the Continental converters from Pro Built? Isn't Trevor running one?
~Brendan

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1988 Turbo Trans Am GTA - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

http://turbogta.homestead.com/main.html

Ray87Z

I originally started to buy one of the continental converters, but they wanted to build it to order so it was going to be like 2 weeks. I wanted it pronto and DY had some in stock, so I went w/ it. I think the quality is probably about equal but obviously I haven't run the CC.

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

Brendan

Ray: Thanks for the info. I'll check out DY and Pro Built. It's either $206 to the dealer or $200 to DY. The one that's in there I had rebuilt heavy duty buy a local guy who does good work so I might check with him too.
~Brendan

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1988 Turbo Trans Am GTA - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

The build up: http://turbogta.homestead.com/main.html


[This message has been edited by Brendan (edited July 27, 2000).]

Curse Z28

try getting the converter from www.gmpartsdirect.com
they are alot cheaper than a dealer...thats where i ordered mine from
the part # for the L35 converter is 24202310

Brendan

Curse Z28: Thanks for that site; they're pretty cheap. They're price with shipping and exchange is cheaper than the dealer wholesale price with tax (my price). I might be getting a converter from them instead of the dealer. I'm still looking at the DY and Pro Built units too.
~Brendan


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1988 Turbo Trans Am GTA - 3.8L V6 turbo w/ 700-R4
"There IS a replacement for displacement!"

The build up: http://turbogta.homestead.com/main.html

[This message has been edited by Brendan (edited July 27, 2000).]

fbodyking

I think Zippy is right!