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My 25.5 Turbo Firebird buildup (lots of photos!)

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Old 07-24-2007, 03:18 PM
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Originally Posted by fash00
Still interested in the dist setup
It's nothing fancy

http://paceperformance.com/index.asp...&ProdID=180629



Detailed Description
The GM front cover assembly is manufactured for application where a 4-bbl carburetor and distributor are required. It can be combined with GM's new Bowtie valve covers p/n 25534398 & 25534399 for a complete traditional looking engine package.
Old 07-24-2007, 06:00 PM
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you're the first person I knwo of using that distributor setup. Any particular reason you went with that vs the standard setup? Obviously your car is making big steam, I am curious if this has anything to do with it, or if it was a personal preferance thing.
Old 07-24-2007, 06:38 PM
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hes probably running a digital 7 and a stout coil. but thats a guess... i know thats what i would do if i had a racin' LS1.
Old 07-24-2007, 08:06 PM
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Originally Posted by vtec
hes probably running a digital 7 and a stout coil. but thats a guess... i know thats what i would do if i had a racin' LS1.
Correct
Old 07-24-2007, 09:45 PM
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is that a privision on the top for a mechanical fuel pump? Looking back to the engine pics, it looks like you have a block off plate for one.

Congrats on getting in the 8.80's with what little traction you had.
Old 07-25-2007, 05:33 AM
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Originally Posted by promod1955
is that a privision on the top for a mechanical fuel pump? Looking back to the engine pics, it looks like you have a block off plate for one.

Congrats on getting in the 8.80's with what little traction you had.
Thanks! One could run a mechanical fuel pump...

I forgot to mention that air fuel was only 10.5:1, which leaves about 75RWHP on the table and we still have at least another 10lbs of boost to play with

I am going to try running a 30x12.5 ET Street in 2 weeks to see if we can hook any easier...

Stay tuned!
Old 07-25-2007, 06:21 AM
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Originally Posted by vtec
hes probably running a digital 7 and a stout coil. but thats a guess... i know thats what i would do if i had a racin' LS1.

Umm quite a few of us see that as a step backwards.....
We were talking about that last night....

Awsome set-up.. not ******* it in one way...
Old 07-25-2007, 07:09 AM
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I can understand why some people might think my setup is old school or a step backwards.... I myself did not quite understand the reasoning at 1st... And for 99.9% of the LSx cars out there this setup would not make sense.... However, my builder chose this route for several reasons.... That's all I am allowed to say
Old 07-25-2007, 08:22 AM
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Again, kickass results. I was talking to Chip Havemann at the NMCA race, and he is a fan of 10.3 - 10.8:1 AF ratios, he ran Outlaw 10.5 and went repeatedly in the 7's on a 28x10.5 tire, and just sold the car. He said the richer AF keeps the engine alive.
Old 07-25-2007, 08:41 AM
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Originally Posted by Pro Stock John
Again, kickass results. I was talking to Chip Havemann at the NMCA race, and he is a fan of 10.3 - 10.8:1 AF ratios, he ran Outlaw 10.5 and went repeatedly in the 7's on a 28x10.5 tire, and just sold the car. He said the richer AF keeps the engine alive.
I agree that a more conservative tune up will be easier on parts! Chip runs twin GT-47's from Precision... single turbo setups are a little more forgiving in terms of A/F... I don't plan on leaning on it too hard unless it really counts or we are trying to prove something

From a reliability point of view, my biggest concern is the GM truck block...
Old 07-25-2007, 08:52 AM
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Originally Posted by NA$TY-TA
Umm quite a few of us see that as a step backwards.....
We were talking about that last night....

Awsome set-up.. not ******* it in one way...

I could still see using Coil Packs on a turbo car, because they still do not have to turn any kind of CRAZY RPM.

For us N/A guys, the coil packs have a hard time keeping up at 9,000++ RPM.


Nice times and nice car. Hope you get everything worked out and really knock out some NICE numbers!
Old 07-25-2007, 08:59 AM
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Originally Posted by BigBronco
I could still see using Coil Packs on a turbo car, because they still do not have to turn any kind of CRAZY RPM.

For us N/A guys, the coil packs have a hard time keeping up at 9,000++ RPM.


Nice times and nice car. Hope you get everything worked out and really knock out some NICE numbers!
RPM is one of the issues... I do believe that the motor will end up revving pretty high once we start making some real power... There are some other factors as well...
Old 07-25-2007, 09:05 AM
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Originally Posted by vmax1500
RPM is one of the issues... I do believe that the motor will end up revving pretty high once we start making some real power... There are some other factors as well...

Excellent! The car does look great. Just watched the video too. You will have your hands full!


Good luck on your quest!
Old 07-25-2007, 09:48 AM
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Originally Posted by vmax1500
I can understand why some people might think my setup is old school or a step backwards.... I myself did not quite understand the reasoning at 1st... And for 99.9% of the LSx cars out there this setup would not make sense.... However, my builder chose this route for several reasons.... That's all I am allowed to say
Yeah thats what a few people have said.... but if it works man.. thats what counts....

I have a question on your turbo.....
What size is the compressor wheel??? i know its restricted to a 80mm opening......
Old 07-25-2007, 10:41 AM
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Originally Posted by NA$TY-TA
Yeah thats what a few people have said.... but if it works man.. thats what counts....

I have a question on your turbo.....
What size is the compressor wheel??? i know its restricted to a 80mm opening......
The turbo details are top secret
Old 07-25-2007, 10:20 PM
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Originally Posted by NA$TY-TA
Umm quite a few of us see that as a step backwards.....
We were talking about that last night....

Awsome set-up.. not ******* it in one way...

A digital 7 has lots of features in it that will help a limited traction setup such as his be able to get down a slick track consistently..
Old 07-26-2007, 05:32 PM
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Originally Posted by NA$TY-TA
Umm quite a few of us see that as a step backwards.....
We were talking about that last night....
each one of those LS1 coils isnt throwing anywhere near the amount of spark an all out race coil designed for the digital 7 can.
Old 08-02-2007, 02:11 PM
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I am heading to the track again this weekend... with a brand new set of 30x12.5 ET Streets... it's a big race weekend up here so track prep should not be an issue... stay tuned!
Old 08-02-2007, 02:15 PM
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Good luck, Andre, go kick some ***!!
Old 08-02-2007, 03:27 PM
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Sweet..... dont forget the video camera


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