well its gettin nicer out (well eventually it will...) and im gunna hit the boneyards up and gunna get the parts for a turbo project. i was thinking of using a turbo from a t-bird super coupe but if i cant find one, what else would work? also i would add an intercooler, would any work or do i need a specific one? what about the wastegate(s), blow off valve and low/hi boost controllers, could i use them from the donor car or would i need different ones? did i miss any parts? im pretty illiterate when it comes to turbo and parts. maybe u can steer me towards a site of some books i can find some useful info and get educated about turbos (seems interesting).

also if i find a I6 that has mass air, id like to swap it to mine, would i take the computer, harness, airbox and tube going to the intake? would i need anything else? would a 5.0 mass air truck would also?

hope i didnt ask to much, thanx

 

turbocoupe, eclipse, supra if you can find it, as well as several chrysler models all have turbos in the approx. size range you want. should be able to salvage a wastegate/blow-off valve from the donor as well, though you may want an aftermarket one to trigger the amount of boost you want.

and on the mass air swap, a v8 ecu will NOT work on the 6 unless you have it reprogrammed and rewired. but the airbox and sensors from a v8 will should with a i6 ecu.

 

ok, thanx. i have a good feeling i can get the parts i need and set them aside and clean em up so there all ready to go. i didnt think a v-8 ECU would work since its programmed for bigger injectors and all anyway. maybe ill just grab the air box since i broke mine and intake tube and fab up a little cutsom intake to get rif of the restrictive tubes...

 

I think the turbo from the T-bird TC is too small, It only had to feed 2.3L. Two of them would probable work for a twin turbo setup. For single turbo, something from a late 70's-early 80's 4.9 turbo Trans Am or a mid 80's GM turbo 3.8 should be about right. Try to get the intercooler from an F-250/350 with a Powerstroke diesel. It pretty much bolts in since it was designed for a Ford truck with the same front clip as yours, plus it has an inlet on the driver's side and an outlet on the passenger side. The mid 80's turbo 3.8's have wastegates and blowoff valves that should have the approximate pressures you're looking for. Larger fuel injectors will be needed. 24's would probably be the best for power production, but the stock ECU can't adjust for them on the low end. 19's should be enough with enough fuel pressure. Don't forget to install an adjustable fuel pressure regulator with them. I like the one from Aeromotive that is designed for the 5.0.

I wouldn't mess with MASS air, it's more trouble than it's worth. The easier way with existing speed density is to use a fuel management unit. That's a fancy term for fuel pressure regulator. These add fuel in response to boost by increasing fuel pressure a predetermined amount for each psi of boost. Typically they are calibrated to increase 8, 10, or 12psi for each pound of boost added to the engine. This is how most centrifugal blowers systems compensate for boost.

 

A pair of the 2.3 turbos would probably be good they are relatively cheap and two little ones would spool up faster than one big one, less lag time. Some of the V12 sports cars run four little tubos for that very reason. on the other hand you could probably find a TO4 or equivalent cheap but in stop and go traffic by the time it spooled up you would have to stop again.

 

A single turbo would be better in this application. A single large turbo is more efficient than two smaller ones. If he was looking to run 25 psi boost twins would work better, but on the street a single would be more efficient and responsive. I've been debating whether to use one or two for a while. So far the best argument I can find for using two is that I can put TWNTRBO on my license plate.

 

if he wants to run about 4-6psi of boost, he should be getting a relatively small turbo and a properly set up waste gate, no?

 

It should be relatively small, but if it's too small it won't be efficient at higher revs. The 2.3 is a little under 1/2 the size of the 4.9 and revs maybe 50% higher, so it needs only about 75% of the airflow the 4.9 needs. The turbo from the 2.3 would probably generate boost instantly, but run out of breath by 3000 rpm. The easiest way I know of to determine turbo compatibility between to engines is to multiply displacement by rpm/hundreds. This results in a constant that reflects the airflow needs of the engine. A 4.9 running at 4000 rpm would be 4.9x40=196. Just to clarify, I'm using rpm/100 to make the numbers smaller and easier to work with. 2.3x60=138, 3.8x50=190, etc. This is all mute if the 2.3 uses the same turbo as the 3.8, which is entirely possible. I used to have a turbo from a 2.3 laying around somewhere, maybe I'll try to dig it out.

 

It's been awhile since the last post and I'm really curious how the 4.9 turbos are turning out. I had been thinking a lot about turbo charged 6 bangers and found some interesting ideas in the mopar world of slant 6
http://www.slantsix.org/articles/tur...bo-article.htm
http://www.1962to1965mopar.ornocar.com/schmid.html

 

I noticed a turbo on Ebay a few weeks ago for an old 80's trans am. A couple things to consider is that it's designed for a draw through and never really cut it for 4.9L. As a toy it would be fun to play with, but potential maybe limited. For all the work involved for a good intercooled blow through, plan on doing it once - and future maintenance. I found this site was quite informative, but unfortunately, the trans-am turbo appeared to be more trouble than its worth IMHO.

http://www.iwaynet.net/~gl&lisk/1980ta.html

 

The garrett T-3 turbo in super 60 trim is the ideal turbo for a stock or near stock 300. it would build boost almost instantly (by 2200-2500 RPM) and would move enough air to feed a stockish 300 to about 5000 RPM. I believe they can be found on the 85-86 thunder chicken, err, uh, thunderbird


Justin