i have a 85 TA w/383 stroker 10.5-1 comp, all forged internals, ported fuelie heads, victor jr. intake, edelbrock 750 carb, blah blah blah. a while ago i came to find out what all people who want to go fast find out, that turbo is the only way to go. so i bought a toyota supra and went nuts (dont crack, it's prolly faster then you F body, cause its faster then mine) so i have 2 ct-26 turbos just laying around and a comparatively slow TA
what i would like is some suggestions from knowledgeable people only on my idea,
i am gonna buy a set of "make your own headers" and make a short turbo header placing the turbo a little above and to the side of the V/C then plumb them to a sheetmetal box around the top of the carb, no intercooler, i dont plan on running anything more then .5 bar, 7 psi, gimmie some thoughts, thanks

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race it or sell it

[This message has been edited by downwithET (edited July 27, 2001).]

 

If you are up to the challenge, I say go for it. there are a number of people that have done it. for that matter, do a seach in this forum & you will see a number of pictures posted of cars that have this done to it.

BW

 

https://www.thirdgen.org/messgboard/...ML/001062.html

im actually considering almost the same thing. take a look at Jesters setup, i plan to copy most of it.

Eric


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My 1986 Z28
GM350, T-5, 3.23's, lots of go fast goodies, 4th gen Firebird interior etc...
85 IROC w/ 1364 miles!

You'll always find what you've lost in the last place you look

R.I.P Dale Earnhardt

 

You need to find some turbo maps, I think that Garett has a website with CFM ratings. I know that pressurizing a carb is a huge project, but there's enough hardware out there to do it. Just make sure that you can flow enough CFM at that low boost pressure.

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'89 Red Formula 350- 350 .060 over forged pistons 232* @ .020 cam Performer RPM Holley 750 DP Vortec 1.94 1.50 Accel Coil and dist. Hedman shorty headers Dual Exhaust w/ cutouts 1LE WS6 suspension, wheels, and brakes, 9 Bolt 3.27 Posi Edelbrock LCA's & Track bar subframe connectors 700R4 A&A snorkel scoop Eclipse Head Unit Delco Bose Speakers 2 12" Pioneer subs w/ 400 watt/chanel amp

[This message has been edited by ATOMonkey (edited July 30, 2001).]

 

Look on ebay. I just saw a turbo adaptor from the old TTA that came out in the early 80's. That would give you a good start. I don't know if it will bolt up but its worth a shot.

 

i am having trouble deciding which turbos to use, my supra turbos are really big. mopar 2.2 turbos? turbo coupe turbos?

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race it or sell it

 

hell yeah!! go for it!! but yeah watch out how much boost you run . 10.5:1 is kinda high for turbocharging ...


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--- Current Daily Driver ---
Maroon 1989 Camaro RS - Crappy 305 TBI / Auto
Hypertech Stage 2 Chip (and 160/ThermoStat)
2.5" Pipes, No Cat, Flowmasters (Dual)
GT Grant Wheel, %5 Tint all around, 50% on windshield

--- Next Project ---
1992 Camaro z28 - 5.7ltr / Auto
6 speed swap, engine internals, turbocharge, SCCA!!!!

[This message has been edited by CrazyHawaiian (edited July 31, 2001).]

 

Great idea. I'm in the planning stages right now myself - TT on my '85 T/A.

Here's my assessment though. I'm going with a TPI setup, much easier than dealing with carburetors under boost (very, very finnicky) because you can almost never get the right A/F ratio. As RPM rises, boost rises - that's a given - and as boost rises, the fuel delivery needs to be greater so you don't run too lean. When dealing with carburetion, everything's usually a compromise, and that compromise is drastically amplified by placing it under boost.
Additionally, 10.5:1 is pushing it on pump gas with carburetion. I don't think you'll be able to run ANY boost on pump gas with that CR. At least not without some serious additive. Also, about the turbos to choose, there's a TON of variables when it comes to turbo selection. That too is a compromise - the smaller the turbo the quicker you'll see the boost, but it will also not flow as much or give you as much in the top end. Is this a race car or a street car? A high RPM motor? If you haven't done much research on the topic -- lookup a book called 'Maximum Boost' by Corky Bell. It's an interesting read, and it's packed with practical info. I don't claim to be an expert, but I do know some things about turbocharging just from the research that I've done, so if you need some help, I may be able to give it ;-)

Personally, for the price that most TPI setups are going and the wealth of info/products out there to assist with the swap, I'd seriously consider doing it before/while adding the turbos.

 

importeater, i have done a lot of research and i also own a 13.97@102 86 turbo mazda 626 and a estimated 750-800 HP 88 toyota supra in the works, i have come to realize that turbo on carbs is easier and way cheaper then turbo with FI.also 10.5-1 comp can be compensated for by a timing control device and fuel control. good luck with your turbo project, email me pics i you have time, i'd like to see how you did it

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race it or sell it

 

importeater, i have done a lot of research and i also own a 13.97@102 86 turbo mazda 626 and a estimated 750-800 HP 88 toyota supra in the works, i have come to realize that turbo on carbs is easier and way cheaper then turbo with FI.also 10.5-1 comp can be compensated for by a timing control device and fuel control. good luck with your turbo project, email me pics i you have time, i'd like to see how you did it

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race it or sell it

 

Down -- I will agree with you on cheaper, but as far as performance and versatility are concerned -- FI is the way to go. I'm still planning everything out and acquiring the parts, so there's nothing to take a pic of right now, but I'll keep you posted. I'm not claiming to be an expert or anything, but I have been doing a ton of research and here's what I'm planning to do:

Complete TPI setup, already have it, just waiting to use it. (I bought a complete TPI engine, all sensors, harness, ecm, everything for $150 - engine is ****, but I wouldn't use it anyway, just wanted to FI stuff) 355, L98 Aluminum heads (modified), still looking for some decent flowing exhaust manifolds, but I'll be flipping them upside down, mounting the turbos either directly on top (if they'll fit under the hood there) or on the side with a 90 deg. bend.

From there, I'll be running the exhaust from the turbos directly back (shouldn't take any more room than average headers.) And the intake side will be running to the front of the car to an intercooler (still trying to decide what the best mounting configuration for that will be.) I've checked out the ATI style intercooler mounting, but my car is already lowered 2" and that (at least in pictures) seems to eat up some ground clearance. I've also considered forming some Grand Prix style cutouts in the nose and mounting the intercooler right behind them, kind of like Skulte's setup.

From the intercooler, the radiator will be tilted back toward the engine a little (won't be a problem with a serpentine/electric fan setup), and a little taken out of the core support, just enough to get the intake pipe from the intercooler to the TPI intake. I'll be choosing an intercooler configuration to allow some sort of 2 in 1 out configuration, or at least 2 outlets right next to each other, combining into one larger pipe.

To top it off, I'm currently trying to decide exactly what engine management system to go with, but I'm definitely leaning towards an Electromotive TEC II system. I've heard loads of good things about them and I like the features. You get the ECM, a harness with all of the sensors, it incorporates a distributorless ignition system and includes the coil packs, etc. for about $1200-1400. Sounds a little pricey to me, but comparatively speaking, it's reasonable. And, it gets me where I want to be. You can actually have many different configuration files, so say you want to go from being tuned for the ultimate power, to tuning your car for gas mileage -- you just load a different configuration file - about 3 clicks. That versatility will only be enhanced by the turbos. I plan to be able to take my car from a 10-20 psi, >25 MPG cruiser, to a 25 psi, 10-11 second machine in about 3 clicks.

Might be overly optimistic, but I'm really not into compromise

I'll keep you posted.

 

Oh -- sorry about the damn BOOK up there.

 

eater, i just went through the engine managment delema with my supra, the most popular ones are Haltech and Tech2 i talked to both and haltech seems to be a little more expensive but supposedly worth it, in just the fact that more people use it and therefore is easier to get help tuning it. i have heard nothing but nightmares from mostly smart people when it comes to tuning these stand alones.
the best 2 i found were..
http://www.sdsefi.com/
http://www.haltech.com/
the simple dig was cheaper and had a heads up device but i dont remember if they had a 8cly version. good luck


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race it or sell it

 

Actually, Haltech makes a version with just the actual ECU (no harness, sensors, etc.) for cheaper than the electromotive tec II. But, what I don't like about Haltech is that you need to use either HEI or an MSD ignition system. Whereas the Electromotive unit features a distributorless ignition. Also, I want something that's tuned from my laptop because I think it will be more versatile than the little handheld job -- so that leaves out SDS.

I think I will need an act of god to get everything running smoothly though - lol.