LSX 454 and Boost
#21
11 Second Club
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Does NRE build boosted 454 LSX's?
NO!
If you had a tall deck then maybe so.
NO!
If you had a tall deck then maybe so.
#22
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How to build a FI 454.....it's done using a Tall Deck.
There's a young man who did this yrs before with his fire chicken ...
https://www.enginebuildermag.com/201...rbo-ls-engine/
Memory and Google search 😉
https://www.motortrend.com/features/...ntiac-formula/
There's a young man who did this yrs before with his fire chicken ...
https://www.enginebuildermag.com/201...rbo-ls-engine/
Memory and Google search 😉
https://www.motortrend.com/features/...ntiac-formula/
#23
11 Second Club
iTrader: (3)
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What he doesn't tell you is that it was with a tall deck block.
#24
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For ANY longevity 4.155" is the max recommended bore by many builders for FI.
This is largely for having enough gasket material between bores as well as
cylinder/block strength.
This is largely for having enough gasket material between bores as well as
cylinder/block strength.
#25
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MY BAD! I compiled images from a WhatsApp chat between me and the shop and failed to realize the dates as well as the differences in the pics! lol.
I guess the question still remain,
Would you boost a 4.200 LSX block? If so, by how much? Obviously will also be running Meth.
Thanks!
I guess the question still remain,
Would you boost a 4.200 LSX block? If so, by how much? Obviously will also be running Meth.
Thanks!
#26
ModSquad
iTrader: (6)
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But indeed, 4.155 is largest recommended bore sizing for safely boosting an LS/LT engine.
The following 3 users liked this post by Che70velle:
#28
9 Second Club
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I was running 300 shot on a LSX 445 almost 10 years in a sleeved LS7 block that finally gave up the ghost. The block was done so guess what i did? Reused everything internally in a new Dart block with some Mast heads. Only major replacement was the pistons. Now i'm a little smaller cubic inch at 440 with a little room to grow in the cylinders. If you know how to build these things and use the right parts i wouldn't be afraid of boost at all.
#29
TECH Addict
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I was running 300 shot on a LSX 445 almost 10 years in a sleeved LS7 block that finally gave up the ghost. The block was done so guess what i did? Reused everything internally in a new Dart block with some Mast heads. Only major replacement was the pistons. Now i'm a little smaller cubic inch at 440 with a little room to grow in the cylinders. If you know how to build these things and use the right parts i wouldn't be afraid of boost at all.
![EEK !!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_eek2.gif)
#32
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I wouldn't hesitate to run 10psi on E85 and with soft timing. I wouldn't run pump and meth. Maybe E85 and meth but not tuned to be meth dependent.