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eaton m90 or maybe m112 supercharger on 305 TPI

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Old Dec 15, 2011 | 04:15 PM
  #1  
Rezi1987TA's Avatar
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Joined: Feb 2011
Posts: 54
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From: Tbilisi, Georgia (ex Soviet Union)
Car: 1987 Pontiac Firebird Trans Am
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.45
eaton m90 or maybe m112 supercharger on 305 TPI

I've received great help here and now I need it again :-)))
I've recently put a Crane Cams 104224 (Duration Advertised:270° Intake / 276°; Exhaust Duration @ .050'' Lift:214° Intake / 220° Exhaust;
Valve Lift w/1.5 Rockers:.452'' Intake / .465'' Exhaust). Otherwise the car is nearly stock. I have Granatelli MAF (which I don't really like...yet at least!) and Mallory adjustable fuel pressure regulator.

I want to put a m90 supercharger on the side of the engine. I know it has been done a lot of times before but here are the questions:

1) Would m112 fit above the left cylinder head or should I go with m90?
2) My injectors are faulty anyways. What size should I buy? And is it possible to fit the 7m Supra Injectors that I can have for free?
3) What size intercooler should I get?
4) What is the most boost I can run to keep it safe?
5) I cannot tune my car anywhere. So I'll have to order a custom burnt PROM. Whom would you advise?
6) Any other advises?

Hope to get help here again :-))) Otherwise I'm in deep **** :-))))))))))
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Old Dec 15, 2011 | 09:45 PM
  #2  
burnout88's Avatar
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Joined: Nov 2003
Posts: 1,629
Likes: 17
From: Somewhere
Car: 88 IROC
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 10 bolt 3.73
Re: eaton m90 or maybe m112 supercharger on 305 TPI

Just curious how is the car running with the Crane 2032 cam? I remember when you were asking about it.

How did the install go?

Last edited by burnout88; Dec 16, 2011 at 08:58 AM.
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Old Dec 16, 2011 | 05:06 AM
  #3  
Rezi1987TA's Avatar
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Junior Member
 
Joined: Feb 2011
Posts: 54
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From: Tbilisi, Georgia (ex Soviet Union)
Car: 1987 Pontiac Firebird Trans Am
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.45
Re: eaton m90 or maybe m112 supercharger on 305 TPI

It ran really well at the beginning! I didn't expect it to be that smooth...I upped the fuel pressure to 50 psi (but I think it's still not enough) and it ran quiet a bit better than before. But than the injectors started to die :-((( I knew that would happen anyways...

As for the power. It shifted upwards on the RPM. I could shift later. It still started sort of choking after 5000rpm but that's probably because of my restrictive intake.
For comparison - my friend has a 91 Supra boosted at 1 bar (14.5 psi). There are no other mods done to it (besides the metal head gasket) and before I wouldn't even dare to race him We did it once from a roll and I was embarrassed :-))) After putting the cam he was still faster than me but he didn't "lose" me as before. And that was without my car running properly (dying injectors, no tune etc). If my car would run well it would probably be really close. Not really hoping for a win but a close race is a good race especially with a friend :-)))

P.S.: When both cars are stationary Trans Am beats the s**t out of a Supra :P it's so much more evil! :-))))))))
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Old Dec 17, 2011 | 02:24 PM
  #4  
Rezi1987TA's Avatar
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Joined: Feb 2011
Posts: 54
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From: Tbilisi, Georgia (ex Soviet Union)
Car: 1987 Pontiac Firebird Trans Am
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.45
Re: eaton m90 or maybe m112 supercharger on 305 TPI

Anyone? :-S
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Old Dec 18, 2011 | 07:27 PM
  #5  
burnout88's Avatar
Supreme Member
 
Joined: Nov 2003
Posts: 1,629
Likes: 17
From: Somewhere
Car: 88 IROC
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 10 bolt 3.73
Re: eaton m90 or maybe m112 supercharger on 305 TPI

Glad to hear everything went well. You may want to post this question in the Power adder section of the forum. Would probably get a better response over there on a supercharger question.
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Old Dec 19, 2011 | 02:02 PM
  #6  
Rezi1987TA's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2011
Posts: 54
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From: Tbilisi, Georgia (ex Soviet Union)
Car: 1987 Pontiac Firebird Trans Am
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.45
Re: eaton m90 or maybe m112 supercharger on 305 TPI

Thanks a lot. I did that already :-)))
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Old May 25, 2012 | 04:36 PM
  #7  
nathan44's Avatar
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Joined: Sep 2007
Posts: 36
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From: dallas, tx
Car: trans am
Engine: 5.3 l59 flex
Transmission: 4l60e
Re: eaton m90 or maybe m112 supercharger on 305 TPI

U have pictures of the build?
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Old Jun 28, 2012 | 01:53 PM
  #8  
Rezi1987TA's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2011
Posts: 54
Likes: 0
From: Tbilisi, Georgia (ex Soviet Union)
Car: 1987 Pontiac Firebird Trans Am
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.45
Re: eaton m90 or maybe m112 supercharger on 305 TPI

Sorry for the late reply. I haven't done anything with it. I bought a 300zx (which I'm rebuilding now) and my firebird is a daily driver now so I can't start building anything. I might do it later and will post pics.
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