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Post by metalbeast on Aug 26, 2005 18:20:21 GMT -5
I have heard of many LTX engines with displacements in excess of 398 CI. My buddy Jeff up the street owns a 99 S-10 with a 421 Stroker in it (that he never drives  )Anyone else know of any examples of larger displacement LTXs? |
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Post by 1bad2k2ta on Aug 26, 2005 18:58:59 GMT -5
I have heard of many LTX engines with displacements in excess of 398 CI. My buddy Jeff up the street owns a 99 S-10 with a 421 Stroker in it (that he never drives )Anyone else know of any examples of larger displacement LTXs? Biggest I have heard of is 434ci. Not sure what that specs out to bore and stroke-wise though. Anybody know? Thanks |
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Post by AAron on Aug 26, 2005 22:39:02 GMT -5
that is just too big to be a small block. i dont like having that long of a stroke.
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Post by metalbeast on Aug 27, 2005 18:46:50 GMT -5
that is just too big to be a small block. i dont like having that long of a stroke. Yeah, thats just too much stress to put on a block. I think a 396 puts out more than enough omph to take care of business ;D |
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Post by AAron on Aug 28, 2005 10:17:52 GMT -5
that and it is a bad ratio even on 396. Chevy has done studies that say destroking a 427 down to 396 produces more power than using a smaller bore with a long stroke. that is why a 302 is such a strong engine
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Post by metalbeast on Aug 29, 2005 21:47:17 GMT -5
that and it is a bad ratio even on 396. Chevy has done studies that say destroking a 427 down to 396 pwoduces more power than using a smaller bore with a long stroke. that is why a 302 is such a strong engine Sorry about modifing your post. Hit the wrong button. You know, I never understood why GM discontinued use of the 302 and went to the infamous 305 & 307 engines. My dad had one in a 67 Camaro he use to street race back in the early 70s. He swears up and down that it was more powerful than the 327 and 427 he also ran in the car. |
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Post by AAron on Aug 30, 2005 0:23:22 GMT -5
not a problem.
well the first problem is that in '69 they went to the big journal engines for the 350. so the 327/302 engines lost that advantage. but the big thing is that in 1970 the SCCA changed the rules and you could destroke an engine for Trans-am competition. so the Z28, the only chevy to ever have a 302, went to the 350.
so the best engines were the 1967-68 small journals they had a lighter rotating mass
oh and there has been talk about some one taking a L99 crank and put it in a LT1 to make a 302. i havent seen any yet.
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Post by metalbeast on Aug 30, 2005 6:33:47 GMT -5
not a problem. well the first problem is that in '69 they went to the big journal engines for the 350. so the 327/302 engines lost that advantage. but the big thing is that in 1970 the SCCA changed the rules and you could destroke an engine for Trans-am competition. so the Z28, the only chevy to ever have a 302, went to the 350. so the best engines were the 1967-68 small journals they had a lighter rotating mass oh and there has been talk about some one taking a L99 crank and put it in a LT1 to make a 302. i havent seen any yet. Its has been done a few times. There was a 1997 Camaro SS that someone destroked to a 302 back in 1997 for a magazine article. I tried to find it but was unsucessful. |
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Post by AAron on Aug 30, 2005 10:04:22 GMT -5
yeah i havent found anything, and have heard a good amount of talk but never seen one
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Post by 94m6hardtopz on Aug 30, 2005 11:47:38 GMT -5
problem is no one makes an aftermarket (big bore) gen 2 block.
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Post by AAron on Aug 30, 2005 13:32:53 GMT -5
yeah that would be nice. but they came out with Gen 3 and said hell with it.
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Post by 94m6hardtopz on Aug 30, 2005 14:20:59 GMT -5
Joe O is running 9.30s w/ a stock block LT1 on the motor, so i guess its not that big of a deal.
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Post by strokedlt1 on Sept 8, 2005 19:47:15 GMT -5
but look at joes combo only real thing left is a LT1 block and wp full custom 18* heads,intake,TB, computer system
ed wrights 383 LT4 intake and heads combo goes consistant 10:30's raw on a stock PCM and 4L60E
cubic inch also comes from bore not just the stroke
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Post by 94m6hardtopz on Sept 9, 2005 0:50:47 GMT -5
yeah, but even .060 over is still only 10ci. since the lt1s arent siamesed bore you cant go .100 over.
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Post by 95formula on Jun 7, 2006 15:45:04 GMT -5
that and it is a bad ratio even on 396. Chevy has done studies that say destroking a 427 down to 396 produces more power than using a smaller bore with a long stroke. that is why a 302 is such a strong engine Thats funny, because I was just thinking and I really want to do a 302 lt1. So if anyone could help me find a crank, or an aritcal if someone else has done it I would appreciate it. |
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)Anyone else know of any examples of larger displacement LTXs?
