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T-76, MAFT, and Fuel System

 
Old 02-26-2002, 01:13 PM
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Default T-76, MAFT, and Fuel System

I am looking to install a T-76 turbo kit. I am not sure how to setup the fuel system. I know that Procharger makes there kit run on the stock injectors and timing. I want to try the same thing with a little more. Can I run stock injectors with an Aeromotive EFI pump and regulator set at 70psi use a MAFT to fine tune the mixture at WOT and still maintain street driving? I have a Nitrous Works system set at 100HP. If I get a turbo I only run about 25-50HP with a little rich for insurance at the track. I will also have an exhaust cutout where the stock exhaust and the new turbo pipes meet. I am not sure how much boost I want to run. Anywhere from 5 to 10 psi will due. Also I want to know what is a good A/R ratio for the turbo to spool up well. Any suggestion on my proposed setup or any better ideas. By the way, I want to put in a 2001 Firebird Formula with a M6.
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Old 02-26-2002, 03:05 PM
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Default Re: T-76, MAFT, and Fuel System

How much power are you wanting to make? I have a 2000 ws6 6 speed. t-76 kit running 8 psi (on 100 octane) with 24 degrees of timing. That has netted me a 11.28 @ 124+ in a 3680lb car (includes my 193lbs) i use the walbro 255lph hi pressure pump in the tank. Also using a holley adjustable fuel pressure regulator plumbed inline near the tank (in the return line) and Lucas 38# injectors. You are gonna need bigger injectors. i would get some 38-42lb injectors. You will need some computer tuning as well. Ed Wright can do it but you want to know what you want for timing before he does it or it will be way conservative. my advice is to lay out your goals for hp and et and lets go from there. You may want to do the tuning yourself with ls1edit but first lets see what you are trying to attain.
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Old 02-26-2002, 03:14 PM
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Default Re: T-76, MAFT, and Fuel System

You will not get anywhere close to that on stock injectors, even at 70 psi

I'm assuming the nitrous is a wet kit, with that and the boost you will need something other than a stock pump.

Save yourself some headaches and avoid the stock timing curve if you plan to run anything other than race gass or some other additive.

Any motor work??
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Old 02-26-2002, 04:17 PM
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Default Re: T-76, MAFT, and Fuel System

I have a stock motor. I really just want to break into the 10-sec zone. I wanted to see if the MAFT can help tune with larger injectors. I know about LS1-Edit, but my 2001 will not be out until later this summer. I guess I will wait for that and upgrade the injectors. What is the stock fuel pressure and is stock line large enough for a 10-second run? Does any one know if the LS1-edit records data? If I run 4-5psi with the T-76 like the Procharger with an upgraded fuel pump, can I get away with stock timing and injector like ATI?
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Old 02-26-2002, 04:30 PM
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Default Re: T-76, MAFT, and Fuel System

Ya you can run low boost and not up the fuel system, but you have to run low boost. There are a few guys with the T-60 kits running 3-4 lbs with out reprogramming. But if you are runnig low boost with out uping anthing else id be scared to run a shot with that. Id also be scared of running a shot with high boost and upgraded fuel system, aluminum blocks can only take so much and the high compression doesnt help.
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Old 02-26-2002, 04:41 PM
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Default Re: T-76, MAFT, and Fuel System

What is typical RWHP output of a car that runs with 4psi of boost? I only want to spray 25HP to add an intercooling effect? For now I want to get the turbo kit and then upgrade injectors, fuel system, and programming when I want more power. What do you recommend the 60-1 or T-76? Eventually, I want to rebuilt the motor with a Lunati 382 Stroker Kit with 9.5 CR. In short, I want to be able to upgrade output with the same turbo?
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Old 02-26-2002, 04:49 PM
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Default Re: T-76, MAFT, and Fuel System

Some else? What do you recommend on the turbine housing or A/R ratio?
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Old 02-26-2002, 05:07 PM
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Default Re: T-76, MAFT, and Fuel System

I meant something else. Also, what is the stock timing curve?
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Old 02-27-2002, 06:00 AM
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Default Re: T-76, MAFT, and Fuel System

with 4psi you'll put out about 420bhp maybe.
The T-60 will support up to 550hp, but if your planing to build up your engine id go with the T-76
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Old 02-27-2002, 06:02 AM
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Default Re: T-76, MAFT, and Fuel System

I know that spraying will cool down the temp a litle but id wait till you drop your CP, Engine can take only so much pressure.
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Old 02-28-2002, 06:02 PM
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Default Re: T-76, MAFT, and Fuel System

That will be alot smoother power curve that my nitrous alone and streetable. Besides like you said I am going to build up my motor.
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Old 03-03-2002, 05:50 PM
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Default Re: T-76, MAFT, and Fuel System

Can I up to injectors size to 30#, use a high flow inline fuel pump, Vortech's SFMU, and MAFT to fine tune the engine without a PCM reprogramming? Of course, I am using a A/F digital meters, one for each bank, that shows voltage.
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Old 03-03-2002, 10:07 PM
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Default Re: T-76, MAFT, and Fuel System

Doing nos + boost is pretty nutty with stock internals. Tbryne, a sponser here at ls1tech has done what your asking (running 10's w/boost and nos) with a vortech and nitrus but has forged pistons and rods.

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Old 03-04-2002, 06:23 AM
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Default Re: T-76, MAFT, and Fuel System

well if you do use forged intnals, and tune everything properly its do-able. Might want to switch to a cast block too.

but you can crank the turbo to your hearts desire to get the power you need, so why spray? but hey try it we wont nock you for having *****. <img src="graemlins/gr_chug.gif" border="0" alt="[chug]" />
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Old 03-04-2002, 08:16 AM
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Default Re: T-76, MAFT, and Fuel System

I am not going to use the nitrous if I can get alittle more out of the turbo. T Byrne first used a stock short block, a Vortech system, a head/cam package, and headers. They then installed that NX carbon fiber bottle and jetted for 35HP. That's running 10.89 on a stock short block. But my question is not the nitrous with a turbo. My question is if I install Vortech's SFMU, a high volume fuel pump, change the injector to 30#, and use the SFMU and a MAFT to find tune the setup?
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Old 03-04-2002, 10:17 AM
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Default Re: T-76, MAFT, and Fuel System

I think you need to back up a step and really think this thru. If you are looking for 10s, this can be done easy with an a-4 and around 8psi. A m-6 will take a little more work to get there. I would go the t-76 route with at least 36# injectors. 30# is just not big enuff imho. Forget the n20 altogether. That is just too much cylinder pressure. TUNING is gonna mean everything with the turbo. if you arent comfortable trying ls1edit, i would send my pcm out to someone to be modded. I am about to get ls1edit myself and would be glad to let you copy my setup. I am at 24 degrees timing now and that seems to be too much with 8 psi...even on 100 octane. I think 24 deg is fine till about 3500 where it needs to ramp down to around 20 at 4000 rpms and then ramp back up to 20+ after say 5000 rpms. This is just a guess as I havent actually done it yet. I know ls1edit is not out for 2001 yet but that can be worked around. The stock fp is 60psi. You will need a good pump and regulator to keep it there. the stock fuel lines are fine. If you want htis thing to live on a stock short block you are gonna have to concentrate most of your effort on tuning fuel and timing....no way around it with a turbotech kit. The incon kit is a more effecient setup....better intercooler setup and exhaust routing so you are gonna have to tune your setup accordingly. I do not think you should try 5 psi with stock timing...just my 2 cents. Look at changing the exhaust crossover that turbotech supplies and the downpipe. THEN you can make more power with less boost and help the engine live longer. The a4 crossover is closer to how I want to redo mine. I think there is enuff clearance to do a much better job than the way its routed on the m6 cars. That also will give you more room to expand the downpipe size. Again...just my 2 cents
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