Doing heads and cam on 100k+ motor?

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Dec 17, 2011 | 11:03 AM

senicalj4579

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Doing heads and cam on 100k+ motor?

Heads and cam are in my thoughts for the car. Motor has 105k. Whats your thoughts on doing heads and cam on a higher mileage motor?

Dec 17, 2011 | 11:06 AM

Ronny_02_WS6

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It will be fine as long as you upgrade the hole valvetrain: pushrods, valvesprings, lifters, timing chain etc.

Dec 17, 2011 | 05:50 PM

3rdCoastPowerSports

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105k no problem. I have done it before with no issues. need some new things though as stated in the post above. I would say if you are really paranoid about it you could run a leak down and compression test just to be sure you don' have any blown rings and such...

Dec 17, 2011 | 05:53 PM

1nasty86

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243's and a custom cam and rock out. i like the eps 226/234... but thats just me..

Dec 18, 2011 | 01:50 PM

senicalj4579

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Thanks guys. Is 450+rwh through a stalled auto out of the question?

Dec 18, 2011 | 04:18 PM

BirdsSince16

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With heads and cam it's very possible.

Dec 18, 2011 | 05:04 PM

peterlawl84

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I did my H&C at around 107k, ended up needing to rebuild the trans and getting a new rear within a couple months (blew both)...just something to think about in addition to the supporting mods already mentioned.

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Dec 19, 2011 | 08:50 AM

BRDMAN

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just do the supporting mods and you be good.

Dec 19, 2011 | 09:03 AM

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Rare96LT1Formula

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Quote:

Originally Posted by Ronny_02_WS6

It will be fine as long as you upgrade the hole valvetrain: pushrods, valvesprings, lifters, timing chain etc.

+1

Also grab a ported/high volume oil pump and some new lifters imo.

Dec 19, 2011 | 11:27 AM

#11

IRONFIST

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From: Calgary Alberta

Quote:

Originally Posted by senicalj4579

Thanks guys. Is 450+rwh through a stalled auto out of the question?

Should be very possible, but keep in mind that even though your engine will make that kind of power, your tranny and rear end ( which have a lot of miles on them ) are likely going to wear out and go a lot faster then if the car was stock.
Also, I noticed that with my build, ( I have about 97000 miles ) my car made about ten less hp then I expected... might be due to the mileage.

Dec 19, 2011 | 02:05 PM

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AiDRocks

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How much HP are you making if you don't mind me asking? I want to do H/C with my 99 as well.

Quote:

Originally Posted by IRONFIST

Dec 19, 2011 | 05:25 PM

#13

senicalj4579

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Thanks for the help guys. Iv been looking at options and looks like the 243s are a good option. Im also interested in having a set CNC'd by Advanced Induction. Says on their website "Typical gains are 40-50rwhp over the as cast 243, with most LS1 & LS2's producing 450-500rwhp SAE with daily drivable cams". Sounds great to me.

I noticed 243s are very common in the for sale section. Would you guys recommend buying them used? And if so, seeing how its recommended I upgrade the whole valvetrain I should buy them totally bare if possible?