Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

LS1 valve springs on L98 alum. heads?

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Old 09-22-2010, 02:05 AM
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Default LS1 valve springs on L98 alum. heads?

will a stock LS1 valve springs fit perfectly on L98 aluminum heads? I want to put 1.6 rockers soon but cant find spring kit for the L98 that will fit the small pocket seat all I can find in my country are 1.510" and larger springs and I was thinking the other day about putting LS1 stock valve springs Im using LT4 hot cam so with 1.6 rockers the lift will be .525"/.525" so a stock LS1 springs will handle that low lift right?
Old 09-22-2010, 03:34 PM
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It would be to your advantage to use a set of Ls6(yellow) springs,you will need to get different retainers and locks since the Ls uses 8mm and the Lt1 uses 11/32....
Corvette LS1
97-98 12554710 199/207 .472/.479 117
98-99 12560964 199/207 .472/.479 117
2000 12560968 198/209 .500/.500 115.5
01-03 12561721 198/207 .467/.479 116

Corvette LS6
2001 12560950 204/211 .525/.525 116 385hp
02-04 12565308 204/218 .555/.551 117.5 405hp
Old 09-22-2010, 04:27 PM
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Originally Posted by F-Body Lover
will a stock LS1 valve springs fit perfectly on L98 aluminum heads? I want to put 1.6 rockers soon but cant find spring kit for the L98 that will fit the small pocket seat all I can find in my country are 1.510" and larger springs and I was thinking the other day about putting LS1 stock valve springs Im using LT4 hot cam so with 1.6 rockers the lift will be .525"/.525" so a stock LS1 springs will handle that low lift right?
Which L98 are you talking about, the old tuned-port L98 in 3rd gen camaros or the l76 variant that has no AFM on it (the same motor in the G8 GT's with no DOD).



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