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

just a little excited today

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Old Oct 26, 2008 | 02:03 PM
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Default it runs !

some pics and a vid I will break up here....







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Old Oct 26, 2008 | 02:04 PM
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Old Oct 26, 2008 | 02:05 PM
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Default enjoy

cutout closed v's open

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Old Oct 26, 2008 | 02:36 PM
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Racecar!
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Old Oct 26, 2008 | 02:40 PM
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Originally Posted by Z8'S
Racecar!
shut up... you should be here helping me bleed the brakes instead of on damn computer
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Old Oct 26, 2008 | 02:57 PM
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I'm on my way
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Old Oct 26, 2008 | 03:49 PM
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VERY clean setup,Larry. How was the fitment on those LPP's?
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Old Oct 26, 2008 | 05:08 PM
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Awesome job larry, your stuff always looks good!

Tony.
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Old Oct 26, 2008 | 05:49 PM
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thanks guys

The headers fit pretty well, except the pass side contacts the frame just a touch. I don't feel any vibration from it at all and had the same issue with another car this week we did the headers on. I thought maybe his car had been in an accident or something until I seen the same issue on my car.



The steering shaft just touched the tube with the bolt, so I just trimmed it a touch. I had already smoothed and paint my steering shaft before, so it may have touched if it had not been done.

overall everything came out as good if not better then planned
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Old Oct 26, 2008 | 06:36 PM
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That just sound SICK...disssgusting....ewhhh..but I like it!
And as always Larry, your install is clean, nice job!

Hoping for some good weather next weekend(Sat). Looking forward to see your new BEAST. Congrats again.

Last edited by BOLO; Oct 26, 2008 at 06:44 PM.
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Old Oct 26, 2008 | 08:19 PM
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Originally Posted by Z8'S
I'm on my way
thanks again

BOLO.. thanks.

I hope to make it with the car. I plan to have Jim tune it tomorrow, so we'll see what happens.
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Old Oct 27, 2008 | 01:38 PM
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We did a little break in and tuning today, but my MAF is bad so it has halted things at the moment.

unlocked and the converter seemed to flash over 5K which is odd

409 rwhp

We made 1 locked run and it made

447 rwhp

I think with a few tweaks after the new MAF we'll see 450-455.

This is with a 4L60E, CM DS, S60 w/ 3.73 and spool, 28" M/T Radials on Street Lites.

BTW : I'm more then happy so far.
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Old Oct 27, 2008 | 01:51 PM
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Congrats Larry!
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Old Oct 27, 2008 | 02:24 PM
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By LS6 valves you mean exactly that? 8mm 2.00, 1.55s. Don't you think those are really small for a 4.030 bore.
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Old Oct 27, 2008 | 02:35 PM
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thanks Josh

Originally Posted by Beaflag VonRathburg
By LS6 valves you mean exactly that? 8mm 2.00, 1.55s. Don't you think those are really small for a 4.030 bore.
yes..stock LS6 valves

could bigger valves, better heads & intake make more power? SURE! I'm not 1 bit unhappy with the setup as is though.

I will update the heads if I ever go with a single plane intake, dist. and stand alone.
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Old Oct 27, 2008 | 07:04 PM
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I have a dumb question, but why did you use those valves? Lightweight? Why not use regular Ferrea style 2.00 valves..I guess,I've never heard of anybody using them before. I guess I should get out more

Thats pretty good numbers for a locked,break-in tune.
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Old Oct 27, 2008 | 07:13 PM
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Larry, awesome power through a 4L60E/S60 combo! And theres more? 'cause of the maf acting up, man, this thing is gonna rock when it's all said and done, especially @ the track.
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Old Oct 27, 2008 | 07:35 PM
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Sounds and looks good Larry almost brings a tear to my eyes. Hope everything works out better than you were expecting. Just not to much better.
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Old Oct 27, 2008 | 07:51 PM
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beautiful, looks great!
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Old Oct 27, 2008 | 08:12 PM
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Originally Posted by flyinZ
I have a dumb question, but why did you use those valves? Lightweight? Why not use regular Ferrea style 2.00 valves..I guess,I've never heard of anybody using them before. I guess I should get out more

Thats pretty good numbers for a locked,break-in tune.
I like the fact that he used them, but I think they're too small. He used them because they are extremely light weight and inexpensive.

Here's some simple comparison of valve weights:

LS6 light 2.00 / 8mm Intake valve = 74.7 grams
LS6 light 1.55 / 8mm Exhaust valve = 64.6 grams
LS1 2.00 / 8mm Intake valve = 101.1 grams
LS1 1.55 / 8mm Exhaust valve = 87.3 grams
LT1 1.94 / 11-32 Intake valve = 110.0 grams
LT1 1.49 / 11-32 Exhaust valve = 95.0 grams

I recently bought a set of these (ls6) valve for $75 shipped. Another advantage of using 8mm valves over 11/32 is that the stem diameter is smaller. That will allow air to move around it easier inside of the runners enhancing head flow. I like the fact that he used the 8mm valve because I've been talking about this for a long time and hadn't really seen people doing it even though it's a no brainer cost wise. The only thing I would have changed personally is using 2.055-2.08 and 1.60 valves with corresponding deshrouding work.
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