general opinion about engine, head, cam combo

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Jan 20, 2011 | 01:13 AM

prerun400hp

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general opinion about engine, head, cam combo

i would like peoples opinion about an engine, head, cam combo.
heres the rundown.
2004 lq9 26439 miles on the short block, arp connecting rod bolts.
cast# 853 ls1 heads ported w/ ls6 beehive valve springs, 7.450 push rods, stock lq9 rockers and valves, arp head bolts.
schneider racing cam .540 lift, 284/294 duration, 114 lobe separation
edelbrock pro-flow xt intake manifold , matched pro-flow fuel rails w/ 39lb injectors and a 85mm cable actuated throttle valve.

with this set up does anyone know a rough hp numbers?

could i go up to a .575 lift cam and achieve better hp numbers?

this is all being backed up by a 6l80e trans.

Last edited by prerun400hp; Jan 23, 2011 at 01:29 PM.

Jan 20, 2011 | 06:49 PM

PREDATOR-Z

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From: BFE

Just at a glance seems your pushrods are too long.

Jan 20, 2011 | 08:35 PM

prerun400hp

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its what i was told to buy by the guy putting the motor together. what would you suggest instead? how would i check to make sure i have the right pushrods?

Jan 20, 2011 | 08:54 PM

armyboyatc

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https://ls1tech.com/forums/generatio...od-length.html

Check this post out and it will tell you how to check. Its always a good idea to measure so you are 100% sure. You dont want your valvetrain clicking and clacking or worse... tearing something up.

Jan 20, 2011 | 09:45 PM

prerun400hp

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thank you for that i really appreciate all the help i'll try the 2nd method being that i have a factory set of pushrods handy and ill be able to do that alot cheaper for the time being.

Jan 20, 2011 | 09:50 PM

TARZAN

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If HP #'s are the main goal, the cam seems like an opportunity IMHO

-Will

Jan 20, 2011 | 10:19 PM

garygnu

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do you valve springs meet the spring pressured need for the cam you listed ?did you buy the cam yet?would you buy better springs to work with a different cam?what do your heads flow ,cfm.there are a couple people on this forum that with spec a cam if you give them enough information.

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Jan 23, 2011 | 12:06 AM

prerun400hp

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i actually have the cam already but its not installed yet. i decided to go to a larger cam and with that will have to get different springs along with pushrods.

as with the other setup i have. the pushrods are the exact correct length for this particular cam the measurement was done prior to me purchasing them for an identical build done a few months prior. With preparing for that cam i had the comp ls6 beehive springs installed in my heads.

i have no flow numbers as i have no access to a flowbench. so i just have to deal with that portion of the build having full trust in the guy doing the work on the heads.

i would like to find a strong combo with retaining the factory rocker arms.
im thinking somewhere between .570 but staying below the .610 lift mark.
by going to a different cam where would be an advisable setting for my rev limit?
would this cam work for me?
https://ls1tech.com/forums/parts-cla...230-238-a.html
any info would be greatly appreciated. thanks guys

Last edited by prerun400hp; Jan 23, 2011 at 05:00 PM.