Quote from: TurboGTUsleeperred90tgp-

QuoteWhat did you do to the injectors and where did you find out what to do  

I just made new slots on the top of the injector to lower them into the lower intake as they were too short. They are perfectly sectioned and pressure tested leak free. I did get some notes from one of your old post about Lt1 or ls1 injectors needing to be lowered (remembered injectors looked the same)..was it you?? Can?t remember.  8) See..I do take notes :wink: .


But what fuel pressure and BSFC are you using for TGP injectors to be maxed at 240? I keep getting about 1 to 1 fuel rise and turbochaged engines using a BSFC of .55 ..or is it because you rose the BSFC to .58 or .6?

Yea it was me that posted the picture of the extra slot in the LT1(or multi-tech 2 I think injectors) long time ago. Glad to see somebody else using them. With just that change I dropped over a tenth. I was just wondering If I had missed something.

As far as the max injector flow. That was an approximation that I remembered from a few years ago. I generally use .55 as the BSFC. Here is the site I use for most everything. Just register and all but a couple of calculations are free. The turbo calculator was free 6 mo ago, now I think its $5 a month. At the time I used it, it didn't have the Gt series turbos but it did give you volume of air. Don't know what it has now.

http://www.smokemup.com/

How is your restoration coming along?

Quote from: ZoTurbowell seeing as how the entire world recommends a better turbo... any recommendations?  I noticed you listed 2 in your post but keep in mind that I don't know what those mean... I'M NEW TO THE TURBO/TGP WORLD! :)  thanks SOOOOOOO much for all your help guys!  You have no idea how long it would have taken me to figure this crapp out on my own on the v6z24 boards.  

So for now... I need to get some 36 lb injectors, and MSD box, a chip tuning, and a better turbo... sigh... better hit the lotto soon ;)

Dave

Unfortunately if you want to go fast it takes cubic money. :wink:

You can get by with the stock ignition although it does take chip tuning to alter it.

As far a turbos if you stick with the new GT series with the t25 style exhaust which is a bolt on other than the oil and water lines which use banjo fittings(available on the net or at any import speed shop)The top of the line Gt turbos are GT3076, 3071, 2871, 2540 which run about $1200.00. These are rated at 400+ Hp and flow from 40 to 45# a minuet. Then there is the GT28 and the GT28RS. I have seen the 28 for as low as $750.00, the 28 RS is still in the $900 - 1000.00 range but all these gt series are coming down in price. On paper my GT28 is putting out about 325 HP which is about what  it?s rated for. All of the GT?s have the T3 compressor or bigger and the T28 turbine which is the limiting factor.
The exducer on the turbine is just under 2? which hinders the flow.

Then there is the T3 family of turbos where you are just about unlimited in HP but you will have to change the crossover flange and the down pipe. Major fabrication. You can bolt a T3 to your xover flange but I have yet to understand this concept unless it?s for cost. T3?s can be had from $400 up in all kinds of varities and is actually the best choice if you want to get over 450 Hp.

I would start out with 30# injectors. I know they work. I haven't been to the track yet with the 36#but my seat dyno says they are what I needed.

What ever you do sneak up on the boost and gradually back down the fuel. Watch 4 and 6 cyl carefully as they seem to be the ones that distruct.
A biger turbo is alot of fun but it is also a bomb waiting to exploed.
:roll:  
Search the net. Just type in turbos and you will get a million hits. Check the prices and do a lot of reading. And don?t forget ebay.

Have fun and good hunting.

Jud

thanks again for the wisdom... I looked around and it turns out I will most likely be going with something in the T3 family.  We can fabricate a flange pretty easily... I mean, just take the X-over you have now and the turbo to a machine shop and they set you straight for about $100-$150.  As for the downpipe, I'm sure they could do the same thing for us... that's what we did with the TGP turbo and the cavalier... the downpipe didn't fit so we cut the part we needed and they fabbed the rest for like $50.  

Find a good exhaust and machine shop and you won't have a clearance issue in the world!!  Anywho, thanks again for the 2 cents... i still think we'll be gettin some 36# injectors though just to keep my options open.  Oh yeah, we're burning a chip and Marcel hasn't done one for a 3 speed auto before... anyone have any advice on this one?? :(  

THANKS AGAIN... AND AGAIN! :)

Dave

Yea...I used the .55 BSFC alot. According to this fuel flow calculator at the bottom...http://www.stealth316.com/2-air-fuel-flow.htm....at 48psi of fuel (43psi base/48psi line pressure due to 5psi manafold boost)..the max fuel flow at 92% DC is 233hp. Might be missing something.  :?:   :?:  In any event..fuel injector upgrades are a must beyond T25 specs so I just got tired of playing with the stock units.

QuoteYou can bolt a T3 to your xover flange but I have yet to understand this concept unless it?s for cost.

That would be me.. :wink: .  This is a budget build..so I kept the TGP x-over (though I want to flowbench it still). The pipe size and T25 flinge size seem good enogh to me...as any T3 has its internal ports no bigger than a t25 flinge. It has a bigger inlet than a t25..but just botle necks way down before it even curves down.

The restoration is comming along slow. I just got the headliner, front valance and door handle. Im also now looking for GTP brake upgrade as it needs roters already. Looking for a PMIII alternitive (hydroboost)..as I don't want to spend $$$$ for a rebuilt. Or even a aftermaket Dual setup if my Fix attempt at the PMIII doesn't work. Need garage now to put it in to strip it down to metal and sand primer sand.


THe 3spd should be fine. TGP has Over Drive..but the ECM will think its in Drive.

THose MSD are good for build boost at line without Brake tq the hell out of the car with a big turbo. Just retard the timing at the hole shot and thats it. HTough mine will be in the chip  8) .

can you tell me exactly what turbo you used because I obviously need something better than the T25... I wouldn't mind using the TGP x over, flange, and downpipe either so I am interested to see what turbo you used that just bolted on.

Dave

Are you talking to me or TufboGTU?
He put a T3 on.

What i don't understand with that is how with the small T25 flange how the t3 is going to push the turbine.

Oh well I am just a lame braine. And it's way past my bed time.

Jud

If you put on a t-25 it will absolutely shred. Turbo GTU I think he put on a IHI off a duramax deisel.

As far as T28 turbo upgrades go..Which ever Jud (sleeperred90tgp) recomended.

On the T3 style..A Super60 T3 or a hybrid T4/T3 like a TO4 50 trim with a T3 stage III turbine wheel. and .63 or .82 housing. Corky Bells' book "Maximum Boost" is some good reading to fimiliarise yourself with the turbo world.

On the T3..the only thing I used off the old setup was the x-over pipe..nothing more. THe down pipe, up pipe had to go. BUT if you do have GOOD welders..then by all means..use them! YOu can just make a new x-over pipe and reposition the turbo to your liking.

Dang..only if I could link you to my old post..but oh well.


T2 Vs T3 flinge...(made holes for T3 here already).



Not too much difference, but it will work.



T3 on the x-over..



What it is now...somewhat..hehe.

Heres the drilled out fuel rail feed line I was talking about.

http://img.photobucket.com/albums/v334/TurboGTU/TurboGTU2/poolcam166.jpg

I don't think the small hole can feed 300Plus HP without some HIGH pressure.

I saw the picture, is this right where the fuel line connects to the injector manifold?

Nope..where the fuel rails connect to the fuel pressure regulator.