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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 410 stroker fired up ...videos comming soon

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Old 09-10-2009, 08:14 AM
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Originally Posted by flyinZ
Not if he has a baseline tune starting off
He said its running rich. it may be too rich.
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Old 09-10-2009, 11:47 PM
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Originally Posted by Bumper Dragin Bird
im trying to do a similar build. what is custom on the pistons? How much did u have to notch the block to clear the rods? thanks
The skirts are slightly shorter ...fully coated ...-6.5cc valve reliefs.. The block had to be notched another 1/4in more than with my previous clearance for when it was a 408. If you go even 408 definitely go with 4 bolt mains. I can see where the caps were walking before.
Last edited by 408StrokerSS; 09-11-2009 at 12:01 AM.
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Old 09-10-2009, 11:50 PM
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Originally Posted by WS Sick
He said its running rich. it may be too rich.
I think its my aeromotive FPR ...It's only running rich at idle...seems like I need bigger injectors according to my A/F ratio at full throttle. Im thinking 46lb
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Old 09-10-2009, 11:56 PM
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Originally Posted by z_speedfreak
wheres the vid??
comming as soon as I get it right
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Old 09-11-2009, 12:19 AM
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Cool build, MTI built a few big cube LT1s in the late 90s, one I remember was a 409 for an Impala, the other was a 400+ cube motor for a red LT1 Z28.

Originally Posted by BIG PURPLE
good luck i built a 408cid lt1 6 years ago with a pair of ported lt4 heads it made nice power for an lt1. if you have any questions give me a holla.
I saw some one local selling your old nitrous motor. Made damn good power.
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Old 09-15-2009, 02:11 PM
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I had eagle forged I beam rods and diamond pistons on my 408 build and turned the rods in 2 cylinders into Twizlers..it was baddd!! The oil pump pickup was also just laying in the pan too..
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Old 09-15-2009, 03:23 PM
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Sounds interesting...how much power did you make before?
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Old 09-15-2009, 04:58 PM
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Originally Posted by AChotrod
what?? Did you say shortie headers??? Man open that baby up with some LTs!!!
lol you beat me too it
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Old 09-15-2009, 04:59 PM
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Originally Posted by 408StrokerSS
I think its my aeromotive FPR ...It's only running rich at idle...seems like I need bigger injectors according to my A/F ratio at full throttle. Im thinking 46lb
are 46lb big enough ??
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Old 09-15-2009, 08:15 PM
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Originally Posted by Racin96ss
Sounds interesting...how much power did you make before?
It made 576 on 110 race gas and street tires

are 46lb big enough ??
They probably would be with high fuel pressure and race gas....I found some 60#'s last night I have decided to go with.
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Old 09-16-2009, 08:27 AM
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You made 576 on motor or...?
Kris
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Old 09-16-2009, 04:04 PM
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Green3spd You made 576 on motor or...?
Kris
on motor
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Old 09-16-2009, 05:13 PM
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you didn't make 570 anything
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Old 09-16-2009, 05:29 PM
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Originally Posted by mdacton
you didn't make 570 anything
thats true the motor did
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Old 09-16-2009, 06:11 PM
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Originally Posted by 408StrokerSS
thats true the motor did
dont play word games, im calling you out and I say your full of crap
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Old 09-16-2009, 06:19 PM
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Old 09-16-2009, 06:23 PM
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You made 570 to the wheels? Or at the crank? Auto or stick. With the heads and throttlebody in the above pick? Those look like stock head castings.

Enquiring minds wanna know, AND see a dyno sheet.
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Old 09-16-2009, 07:21 PM
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When I seen this thread I initially thought BS, I would like to be proven wrong myself
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Old 09-16-2009, 07:42 PM
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Alek's 355 LT1 with a solid roller made 500whp still using the factory castings (i think). I don't find it that hard to believe a 408 made that kind of power.. who knows. I'd like to see this be true. Get a video of it being dyno'd or something
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Old 09-16-2009, 08:00 PM
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didnt he say he had shorty headers too?


I dont buy that that other boy made no 500 either...... easy way to tell though. Run the car
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