LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Valve spring question.

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Old Mar 21, 2007 | 07:09 PM
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henryz28's Avatar
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Valve spring question.

I just sold the springs that came with my lt4 hotcam kit.And I want to buy better ones, what springs should I get?I do not want to do any mods to my heads I want springs that will work with no other mods.thanks
Old Mar 21, 2007 | 07:15 PM
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why didn't you use your lt4 springs? theye are more than enough for that cam...
Old Mar 21, 2007 | 07:29 PM
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I was told that they arn't that good; I was told that they are barly good enough for that cam and the 1.6 rrs.I want somthing that will be more than good enough.
Old Mar 21, 2007 | 08:19 PM
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I think the max lift on the lt4 springs is .525 and the hotcam lift is .525 without the 1.6rrs.
Old Mar 21, 2007 | 08:23 PM
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lt4 spring example: if your install hieght is 1.78" and coil bind is 1.085"... that leaves you with 0.695" of lift... then you have to deduct 0.060" of lift for your green zone(which is the recommended distance from coil bind) which leaves you with .635" of lift with 1.5 rocker arms... now if you have 1.6 rockers then you must subtract an additional 0.034" from your lift... which would then leave you with 0.601" of lift...

and your cam has 0.525" of lift which would give you 0.076" of safety...

more than enough...


check my work guys, i think i got everything...

Last edited by ZL1modified; Mar 21, 2007 at 08:24 PM. Reason: *
Old Mar 21, 2007 | 08:26 PM
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Originally Posted by henryz28
I think the max lift on the lt4 springs is .525 and the hotcam lift is .525 without the 1.6rrs.
a stock lt4 cam is 0.467" lift on the intake
and 0.480" lift on the exhaust...

depending on what kind of money you want to spend and if you are going to install a bigger cam in the future has alot to do with the decision you will make...

if its money then i would get the lt4 springs...

if you are going to go bigger some day i would go with those 26918 beehive springs from comp...

Last edited by ZL1modified; Mar 21, 2007 at 08:32 PM. Reason: !
Old Mar 21, 2007 | 10:31 PM
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I think I am going to go with the comp beehive springs;never know if I want to go with a bigger cam latter on and they are a lot stronger spring.
Old Mar 21, 2007 | 11:11 PM
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Other options to beehives

Although I have the 26918s installed, I did seriously consider the
Isky 235-D springs first. If you want to save $$ the Iskys will do
the job with all the stock hardware. You can do a search for more
info.
Old Mar 22, 2007 | 09:04 AM
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Originally Posted by henryz28
I just sold the springs that came with my lt4 hotcam kit.And I want to buy better ones, what springs should I get?I do not want to do any mods to my heads I want springs that will work with no other mods.thanks
Then get the beehives, more than enough spring. Plus you can use them down the road if you change cams. If they won't work with your next cam, then all I can say is, "damn that's a big cam".
Old Mar 22, 2007 | 05:30 PM
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Originally Posted by truedualws6
Although I have the 26918s installed, I did seriously consider the
Isky 235-D springs first. If you want to save $$ the Iskys will do
the job with all the stock hardware. You can do a search for more
info.
Are you saying that if I get the Iskys I will not need anything else but the springs.I can just reuse my stock hardware.
Old Mar 22, 2007 | 06:13 PM
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Originally Posted by henryz28
Are you saying that if I get the Iskys I will not need anything else but the springs.I can just reuse my stock hardware.
how high do you plan to rev?

i don't think the stock hardware is meant for a high rev definently not with springs with high seat pressure... i.e. 6000 and up
Old Mar 22, 2007 | 06:50 PM
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I really don't plan on reving it pass 6000.
Old Mar 22, 2007 | 07:19 PM
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You can get the 26918 springs as said before and I'd recommend those if you can afford them. Make sure they'll work with the self-aligning rockers that come with that kit and get the +.050" hardware for the LT1 heads.

There is a nice kit from Crane that should work with that cam and plenty of others as well and it's cheaper. The main benefit to the 918's are that they're a much lighter spring.
Old Mar 22, 2007 | 08:05 PM
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if you go big in the future you will almost have to rev high to get all the benifits of the cam... ditch the stock hardware...
Old Mar 23, 2007 | 12:31 AM
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Ya I am just going to cough up the extra cash for the beehives.Thanks
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