well im very interested into swap my old 2.8 carb from my 82 firebird s/e and i was thinkin of a V8 but ive been hearing so good comments about the turbo 3.8v6 ..what will happen if i put on a turbo 3.8 from a Regal or a Grand national???will it perform like the 89TTA closely...will it be better than a V8 ? it will work with my TH 200C tranny???

 

Look in the Frequently Asked Questions (FAQ). I wondered the same thing, all the answers are there.

 

hey i went to the drag strip lastnight and there was a GN there.....that was running 11's!!!!

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84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
best E.T. (dont laugh) 15.997 @86.04mph
http://www.geocities.com/K_towngangsta

 

You need TTA heads (3.0 FWD heads essentially), TTA pistons (deeper dish, the GN pistons and the TTA heads will yield about 9:1 static CR, the GN's and stock TTA's have 8:1, TTA headers and downpipe. Thats about all the TTA specific stuff ya need, GN block, intake, turbo, injectors, intercooler (the TTA cooler is a little different, but the GN cooler will work) will all work, as well as GN tranny and GN rear (8.5 rear instead of a 7.5). That's the meat of the project, good luck .

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87 GN
89 RS
85 Toyota 4x4

 

The GN rearend will NOT bolt in.

 

Are you sure? I thought the TTA's got the same 8.5 rear as the TR's? I guess you would know more than me though, being as you own one

 

I'm Positive.

------------------
-Mike
89 TTA
PT51, V4, 50s, 3DP, Stock Long Block and Convertor.....
11.25@121 w/1.56 24psi Through the Exhaust on a 16psi launch

1998 LS1 T/A 6-Speed
13.10@106 Factory Stock down to the air in the tires. 296HP/319TQ

 

You can put in a GN engine right in as long as you delete the AC. If you want AC then you need to do the FWD heads as mentioned above along with the TTA specific exaust. headers. The rear end on a GN is a lot stronger but will not bolt to a Camaro/Firebird. it is a 4 link coil sprung design. It would need to be converted to the f-body coil sprung 3 link + torque arm design.

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

TTA has the Aussi 9 Bolt and is STRONG. I see them holding up to runnin 11 sec 1/4s


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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

TTA has the Aussi 9 Bolt and is STRONG. I see them holding up to runnin 11 sec 1/4s


------------------
89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

can you use the harness and ecm from the grand national

 

Actually Kyle the TTA rear ends are not that strong. People think they are more strong than they really are. If you have the money go for a Ford 9 bolt. You will not have to worry as much with it.

 

yes

 

I wouldn't(in fact I didn't ).You'd have to combine the GN harness with your original harness,personally I think the outcome would be better with a TTA harness,which by the way you can still get from Caspers Electronics.Or you may find one(or two)used like I did.

Also,I personally think the stock 9 bolt is weak but I can't deny hearing of them lasting with some serious power.I myself put a whole season(at least 80 runs)of 1.60-1.63 60ft's on one without problems.

If anyone is interested,I just got a digital camera and have been taking pictures and documenting everything that I've been doing getting my swap done.Just shoot me an email,TTA850@aol.com,I'm glad to help.

Steve
-----------
1989 Turbo Trans Am's #124 and #850
1989 Turbo GTA,600hp 3.8L SFI TURBO(in progress)
2001 Kawasaki ZX-6R

 

which companies make parts to assist with the swap and web sites if they have any
most importantly can you get the headers from the tta so that you can keep ac

 

I put 300+ runs on my 9-Bolt with a Best 60ft of 1.60 on it. I now have a Dana 44 but the 9 Bolt is still kickin with 103K miles on it.

Get a new TTA harness from Caspers and save yourself some time.

------------------
-Mike
89 TTA
PT51, V4, 50s, 3DP, Stock Long Block and Convertor.....
11.25@121 w/1.56 24psi Through the Exhaust on a 16psi launch

1998 LS1 T/A 6-Speed
13.10@106 Factory Stock down to the air in the tires. 296HP/319TQ