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10-09-2019, 11:18 PM | #1 |
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95 lt1 block?
Is it legal to run a regular old style Chevy block rather than a LT1 block in a 98 Camaro in stock eliminator ?
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10-10-2019, 02:58 AM | #2 |
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Re: 95 lt1 block?
Yes, as long as the main bearing size is the same. In other words, you can't run the small main journal Chevy pre-1968 block.
The blocks are NOT a direct replacement. The LT block has a completely different cooling routing system, unique front drive distributor, different timing cover, etc. Others have converted an LT engine to a earlier generation block, but it's not that easy. |
10-10-2019, 09:39 AM | #3 |
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Re: 95 lt1 block?
Maybe in Superstock, but in stock you must use the Opti-spark, which requires the LT1 block.
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10-10-2019, 10:05 AM | #4 |
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Re: 95 lt1 block?
MSD and stock GM Opti-spark's will work the traditional style sbc blocks.
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Drew Whalen Stk 3186 |
10-10-2019, 11:09 AM | #5 |
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Re: 95 lt1 block?
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10-10-2019, 11:41 AM | #6 |
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Re: 95 lt1 block?
Standard sbc water pump with spacers to clear distributor. Water flow can be either direction, these motors don't see enough temperature to need the reverse cooling.
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Drew Whalen Stk 3186 Last edited by Whalen3186; 10-10-2019 at 11:44 AM. |
10-10-2019, 11:49 AM | #7 | |
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Re: 95 lt1 block?
Quote:
Seems to me the issue is how to adapt the front cover to the old style block . Isn't the shape and bolt pattern very different . Also wouldn't the water in the heads be deadheaded . |
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10-10-2019, 12:40 PM | #8 |
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Re: 95 lt1 block?
Rare they are but they did make Bowtie LT-1 blocks....
They were made in a std 4" bore size and a larger bore....4.125" I took delivery of 1 for someone who found 2 or 3 available somewhere. I was aware that Bowtie blocks could be adapted for use in SS with a belt drive distributer but never knew of or saw one in Stock adapted somehow to drive an Optispark distributer with the LT-1 timing cover....on a std type block.... An Interesting topic....
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Rich Biebel S/C 1479 |
10-10-2019, 12:57 PM | #9 | |
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Re: 95 lt1 block?
Quote:
There are two water passage plugs on the heads that you remove with an adapter that bolts on to adapt to an -AN fitting. A standard SBC water pump with enough spacers to make a good border wall will be necessary to clear the Optispark or MSD. I suggest that you use the largest water return lines and -AN Y fitting coming from the heads that will fit. Hope this helps. |
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10-10-2019, 01:02 PM | #10 |
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Re: 95 lt1 block?
I forgot to mention that the reverse cooling for these engines was a way to somewhat battle detonation on pump gas and utilizing higher compression for a street car. We can and do run much higher octane with our racing fuel so it is a moot point on how it cools from the top down or bottom up.
Just make sure it cools. |
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