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Internal mods on high mileage motors????

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Old 04-26-2008, 12:23 AM
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Default Internal mods on high mileage motors????

Hey guys,

I have a 2000 ws6 m6 and it has 121,000 miles on it. the miles are mosty express way miles... I am looking at putting a decent size cam in it. I would also like to put headers and an ls6 intake on it. After these mods car would be dyno tuned. My question is has anyone started these kinda of mods at this high of mileage before??? If so how did the stock bottom end hold up? i would be looking at 370-390 rwhp... Just a little worried about how the stock bottom end would hold up? any info would be great thanks.

jimmy
Old 04-26-2008, 01:43 AM
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My advice is:
1- do a leakdown and compession test first,
Based on those results then make a decition.

But, on high miles motors it is not only a matter of good ring seals, what goes south are usualy the bearings.

For the amount of power you want, a mild cam is all you need.
Old 04-26-2008, 06:31 PM
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thank you predator-z...

what size cam do you consider mild?
Old 04-26-2008, 10:04 PM
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Like TR224 or TSP 228R
Old 04-27-2008, 12:30 AM
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I done my H/C at around 125,000 and the stock bottom is holding up fine so far.
Old 04-27-2008, 12:43 AM
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thank you both... mchdg86 i noticed that you have pacesetters how did those fit up? i had someone tell me that those headers dont mount up well so i didnt buy them but i still want a good header for a decent cost. kooks and slp lt are way to much money..
Old 04-27-2008, 07:01 AM
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Originally Posted by LYNEMUP2KWS6
thank you both... mchdg86 i noticed that you have pacesetters how did those fit up? i had someone tell me that those headers dont mount up well so i didnt buy them but i still want a good header for a decent cost. kooks and slp lt are way to much money..
Who ever told you that does not know what they are talking about . Pacesetter headers are one of the easiest header to install and the fittment is top notch !
Old 04-27-2008, 07:45 AM
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Originally Posted by LYNEMUP2KWS6
Hey guys,

I have a 2000 ws6 m6 and it has 121,000 miles on it. the miles are mosty express way miles... I am looking at putting a decent size cam in it. I would also like to put headers and an ls6 intake on it. After these mods car would be dyno tuned. My question is has anyone started these kinda of mods at this high of mileage before??? If so how did the stock bottom end hold up? i would be looking at 370-390 rwhp... Just a little worried about how the stock bottom end would hold up? any info would be great thanks.

jimmy
Predator-Z is correct follow his advice.
My friend has a 98 formula with 110XXX on it.
Was running great with a small 221/221 cam for many years.
He just installed a 238/242 cam with some ET 5.3's.
In about 2 weeks it started making a whinning sound like a belt slipping NOT.
Cut open the oil filter and said it looked like he had struck gold.
Rod bearings
New motor time.

Last edited by 00T\A; 04-27-2008 at 08:45 AM.
Old 04-27-2008, 12:19 PM
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Originally Posted by LYNEMUP2KWS6
thank you both... mchdg86 i noticed that you have pacesetters how did those fit up? i had someone tell me that those headers dont mount up well so i didnt buy them but i still want a good header for a decent cost. kooks and slp lt are way to much money..
Yeah they were lieing to you, pacesetters fit up great.
Old 04-27-2008, 04:34 PM
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116K miles on my stock shortblock, with heads and cam. No degradation in power at all. As long as the motor is in sound condition, no reason not to cam it.



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