Hi all! I've got a 88 GTA ive been looking at turboing for a while
83k miles
305tpi
Maf
9bolt
700r4
Here's what I know I need:
Ebl or code59
Bigger injectors 42lb?
60ish mm turbo?
Misc turbo stuff( oil,bov,wg,clamps boost controller etc.)
Probably will need to switch to sd/map but I've read about a 600hp capable maf?
Aeromotive stealth
Afpr
Ic/ methanol

The turbo will be behind the passenger side headlight much like quadgoat's setup
I would like to Keep ac, ps, cam, heads, and intake and run 11:90s (but that can be slower) on 12psi
I've been diligent in researching what I need for this build and have read project89, street lethal, bbs, zz3, Orr, yj89, junkcltr and bandit's threads/posts. But I've still got questions...

What size turbo? I read that street lethal suggests a max of a 60-1 turbo for a 305. I wouldn't mind going with a smaller turbine housing and giving up a bit of top end.

Injectors? I'm thinking 42s but I'm not exactly sure as most people seem to be running upwards of 60lbs

I can weld and mostly have my head wrapped around putting It together physically, but I don't know exactly what parts to run.
Thanks guys!

 

It's not so much the physical size of the turbo, but turbo flow. A 60-1, depending on which turbo manufacturer, will propel a V6 deep into the tens with 20+psi, some even run nines, so a V8 will be very comfortable at a more boost friendly pressure. There is a guy I know named John Huber who ran a 10.9 with a tiny TA49 turbo with his Buick 3.8 V6, so a 60-1 on a 305 will get you where you need to go whenever you need to. All we really need to do is look at our fueling, meaning how much we're consuming, as that along with vehicle weight tells us everything when it gets right down to it. I usually recommend a 60-1 turbo for a 305 because it is a good street turbo at low boost (8-psi), and a great strip turbo at mid boost (15-psi), and with your goal of 11 seconds, you won't even need to run upwards of 15-psi of boost, but you always can though. 42-lb injectors are fine. The idea is a happy medium for an enjoyable ride...

 

So something along these lines?
http://www.ebay.com/itm/Turbonetics-T3-T4-60-1-turbo-Journal-Bearing-free-ship-/260319696159?pt=Motors_Car_Truck_Parts_Accessories&hash=item3c9c43551f&vxp=mtrOr replace ebay ones like an alternator? Lol.

And yes, my goal is a happy medium for a mustang smoking enjoyable ride

 

Your running Tuned Port Injection, where are you planning your redline? Are you installing a cam, if so what are the specs? Any head work, or aftermarket heads? Are you planning on a stall speed, if so how much? There are many questions you need to ask yourself before committing to a particular turbo, don't just select a 60-1 Turbonetics because it is a 60-1 compressor wheel, as the exhaust side has a great deal to do with the overall setup and performance as well depending on your setup...

If your just looking to smoke Mustangs and could care less about everyday driving comfort (I used to own a GTR, that is why I am adamant about pushing comfortable daily driving along with killer power), then toss on a giant turbo. Or, just go with a 59mm Batmowheel turbo and be done with it the right way...

http://www.bullseyepower.com/S200.asp

 

I understand the turbine size has a lot to do with how the turbo spools and that cam and heads determine redline/power band and airflow.

My question is: am I crazy to think that the stock top end will go 11s or 12s on adequate fuel delivery ,boost, and spark?

 

Crazy? Not at all. By the way, that video above was added for the batmowheel effect only, as there is no way a 59mm turbo is making 930 horsepower. To answer your question though, like I said above, it depends on the turbo and how much air it flows, it depends on how much fuel your burning with that air flow, and it depends on your weight. Tuned Port Injection is not a limitation, the cam they came with from the factory is, as well as the heads and ECM code as well, not the intake. I siamesed my TPI because of my individual RPM goal, no other reason. Boost changes everything though, 11's will be a breeze...

 

So, just so I understand,
Boost, ebl flash, fuel, and tune.
No cam or heads......?

 

It takes about 375-400 RWHP to run solidly in the 11's, and 15-psi doubles your stock rear wheel horsepower rating. But again, turbo's flow differently, and some will make more power at 15-psi than others. Invest in a good turbo charger, upgrade your fueling so that it will compensate, get your wastegate, your bov, your intercooler, your headers and your engine management, and 11's will be an absolute breeze. You think your LB9 heads and intake are factory poor? Have you ever seen a factory set of Grand National heads and cam? They are garbage, but bone stock they will run 11's with an itty bitty turbo at 3600 pounds at 20+ pounds of boost. You have two more cylinders, more cubic inch displacement, bigger valves, bigger cam, and lighter weight...

 

"Turbos flow differently and some will make more power at 15 psi than others"
This hits the nail on the head of my stumbling block with this setup.

So with all of the different options for turbos, where do I start and what do I look for in a turbo?

 

Found some 5.0 guys trapping 120+ with one of those tnetics 62-1s 65mm turbine with a .68ar. I think they flow 67 lb per min. Could this be a candidate for my 305?
They are seeing full boost, usually 10psi, at 2600 to 2800.

Too small, too big?

 

I was gonna say follow what the 5.0 ford guys do on theturboforums. They will run 60-70 mm t4 turbines all day long and make 400 whp easily. Now a 67-70 with a good wheel can make 600whp and is overkill for you, you can find them more often. On3 mustang kits are popular and their t70 is cheap. I have seen them and doesnt look bad for the money

If you can get a T4 frame with a .68 housing it should spool very fast. .96 would be better for top end and less backpressure

60-67 mm should get you there. If car is 3500 lbs with you, it only takes 340-350 whp as long as air is good and car can launch! Else figure 400 whp to comfortably get there on a weaker 60 ft

42 lb inj should do it for 400-450 on boost.
I would give the motor a mild cam and give heads a good cleaning and valve job. Set up heads with good springs and maybe even screw in rocker studs.

 

OP. The goal is not to squeeze the most power out of the car, its as close to 11s as possible on stock stuff minus fuel delivery and tune.
Stock cam, heads, intake, block, rotating assembly, rockers.

 

In that case just need more boost and rpm. I would port the intake and find some siamesed runners and throw in some 1.6 rockers. Make a few ponies and gain more rpm range. Rpm is more power.

You can try stock tpi for now and run all the boost you can to get there, and see what happens. Then do intake mods to improve power output if required to get your goals.

I would look into a decent T4 60-67 mm turbo.

I have a 305 tpi motor i am trying to decide if i want to do a turbo experiment or heads cam comparo, may happen 2014-2015, as i havent got my big 401 running yet. I should have done the 305 this year. If turbo i will use one of my T70's with a .68 housing then try the .96's. tpi intake and then maybe a singleplane

 

these 2 guys have a wealth of knowledge, as theyve both stated a 60-1 will even make more than your goals.

if trying to keep cost down you could find a holset hx40 in a t4 flange, the 6 blade flows enough to support 600rwhp. theyre real popular among the dsm community and those little 2liters spool them under 4k.

 

Nice thread. Subscribed. 11s shouldnt be a problem to achieve at all with the right items

 

So after some more research and comparrison it looks like ill be doing a 62-1. I think at this point im splitting hairs on exactly what one to run. I've found these on ebay for 800 new from a turbonetics dealer.
Should I be weary of these?
Id feel better ordering them from Summit but they only have them in .81.

 

T3 in .81 is somewhat similar to a t4 in .68. If its a t4 turbine in .81 i wouldnt be too concerned, should still spool quick with a good tune and bit more converter

 

The 62-1 is a t4 iirc
It seemed to work for TurboedTPI, with the cam and 113 heads, I guess the smaller ar would be better for less cubes, stock lift, and stock converter.

 

This sounds EXACTLY like what I want to do with my car. But I jumped the gun and bought a turbo and junk years ago. I'm going to be following this thread closely as I hope to start putting mine together sometime in the offseason. Good luck on the build.

 

Thanks! I'm working on paint, seals and interior at the moment so it will be a little while.

 

So I've had this sitting around for a while and kept debating on whether I should use this.

It's one of the rajay turbos from a Martin turbo system. Would this be too small? I've read that they are pretty much identical to a t04b.

3AA1EE10B1

 

Hey lb9, what turbo did you buy for your build?

 

That may work. The information i found says thats a 54mm/76mm comp wheel but not sure what the exhaust side is. If the car is light enough and can launch well, you can squeak an 11 with 350 whp and thats not asking alot out of a 305 on a few lbs of boost

 

I have a rajay as well. Mine is a 3AJ1EE1BB1. I also got my hands on a free Holset from an '03 5.9 Cummins in case I want to go crazy with it.

 

My fastest trap speed in the 1/4 mile was 130mph with a 62-1, it will support good power for sure.

 

Is this car done now or whats the current setup going to be? I'm planning on using an ebay twin turbo kit with my larger intercooler and click off 425+hp out of my tpi305, and later put it on my 357 forged motor. So Let me know what this project is like? I just don't wanna spend a ton of doh on a single turbo, when I can run two smaller ball bearing turbos, run the car for 5-10 minutes after I stop driving to cool the turbos off, and the turbos should last, they proved them in hot rod and car craft, if properly taken care of and oil changed, they can last

 

It's still in production. The plan is to run the 62-1, sandersons headers, EBL flash, 42lb injectors, 38mm Tnetics wastegate, aeromotive stealth pump. Im pretty much duplicating quadgoat's setup minus the physical motor parts.
PSI isn't cheap, after research im finding this to be true.
talk to project89, he can get you squared away with what stuff to ebay.

 

Right now I'm focused on getting the car nice.... paint, interior. But it will happen.

 

Oh cool, so I ordered twin t3/t4 setupo with upwards facing headers, and I'll cut two holes in hood to clear them, later will cover. I am gonna get a 50mm BOV as recommended for race setup, use my large 3" inlet and outlet intercooler and hopefully finish mine by next summer, its too cold out right now to work on, its outside. Then buy the return line kit, plumb return into mechanical fuel pump block off plate, and set my methanol injection setup, so this 305 should do 425+hp with 22lb injectors, but I have some 24's I used in my older tpi350. I did the math, 21lb are good for 425hp with a good fuel pump, I have walbro 255 now, I will also add a adjustable regulator to those injectors, since there bigger I don't techincally need a FMU, I can't wait to work on this. I'm gonna get the turbos in, then see how I'm gonna setup the BOV, then buy a 3" aluminum intercooler kit to plumb that, then set the turbos up to blow to one side of the intercooler, but I wanna set them up, then see which side to run them to, to give the most room ya know?

 

My 62-1 is due jan 3. They were sold out during Christmas

 

You still need a way to add fuel per pound boost which means fmu or preferably a 2-3 bar map system

24's may do 350's whp i would go 30's for margin

 

This Fancy box showed up around 3 or so today!

 

For some reason I can only post one pic at a time from an Idevice.
Anyway, here it is.

 

Well, after much deliberation, thinking, reading, and YouTube, I realized that for every person that tunes a TPI motor there are several more that tune LS motors. Plus there are several benefits to the swap.... Mpg, Hp etc, things covered in the ls swap sticky.

Needless to say my dreams of making this 88 305 fly are now replaced with a 346 ls.
So, this will probably include a post in the ltx/lsx form in the future.
Plus a tc78... Can't forget the important details.

 

hey finally someone who turboed a firebird!!!! hey how did you mount the intercooler
do you have any pics???? any problems with heat??? thanks T