LT1 Limits?
Thread Starter
Teching In
Joined: Aug 2004
Posts: 46
Likes: 0
From: West Palm Beach Florida
LT1 Limits? Hey Guys.... I'm trying to finish building my Supercharged 383 w/ NOS 93 TA, and I was just wondering how much HP a stock LT1 block can take? AND! Are you better off using the factory 2 bolt main caps with a girdle, or is it better to have it splayed to a 4 bolt? I've heard some people argue about which is really better with no real outcome... thanks guys
On The Tree
Joined: Nov 2003
Posts: 189
Likes: 1
From: South Jersey
You might want to read the topic "what block for XXX horsepower" right below this one. The block will take it. Everyone generally agrees that the splayed 4 bolts are better, when it comes to numbers most people including myself stop talking. I just have no experiance to quantify "how much" better.
Rich
Rich
Thats you going to be your limit. Theres a blown Firehawk down here, making 9 some at the wheels, its on a T-trim at 22lbs and a big ol wet shot. Has a LT1 block still in it. RickC5 has a 96 Formula on a 91.5mm, that car really should test the limits of what an Lt1 can take. Couse plenty of guys ave gone 15xmph in the 1/4 with LT1 blocks.
TECH Resident
Joined: Jun 2002
Posts: 943
Likes: 2
From: Houston
rick ran in the bottom nines on a wild LT1 with a big shot of gas for a while before deciding to swap to a wilder setup with turbo's. He should be running solid 8's with the LT1 block when he is finished. Shouldnt be too far from now.
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9 Second Club
Joined: Nov 2002
Posts: 1,295
Likes: 1
From: VA
what limits??? 
to my knowledge a 4 bolt straight or splayed lt1 block has yet to have a block failure..... only one even close was madmans lt1 and that block broke cause he hit the guardrail and impact hitting waterpump cracked it.... I been wrong before so who knows,but I think parts have failed before the block has ..exception being 2 bolt factory mains which I know have failed...
to my knowledge a 4 bolt straight or splayed lt1 block has yet to have a block failure..... only one even close was madmans lt1 and that block broke cause he hit the guardrail and impact hitting waterpump cracked it.... I been wrong before so who knows,but I think parts have failed before the block has ..exception being 2 bolt factory mains which I know have failed... 
Launching!
Joined: Jan 2004
Posts: 201
Likes: 0
From: Clearwater, FL
Originally Posted by dhdenney
I left the 2 bolt mains in mine. Some old timer once said to me, "Have you ever heard of someone breaking their mains?"
TECH Senior Member
Joined: Jun 2003
Posts: 9,339
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From: NYC metro area
Originally Posted by Joe Overton
what limits??? to my knowledge a 4 bolt straight or splayed lt1 block has yet to have a block failure..... only one even close was madmans lt1 and that block broke cause he hit the guardrail and impact hitting waterpump cracked it.... I been wrong before so who knows,but I think parts have failed before the block has ..exception being 2 bolt factory mains which I know have failed...
to my knowledge a 4 bolt straight or splayed lt1 block has yet to have a block failure..... only one even close was madmans lt1 and that block broke cause he hit the guardrail and impact hitting waterpump cracked it.... I been wrong before so who knows,but I think parts have failed before the block has ..exception being 2 bolt factory mains which I know have failed...
