R-1303

planning to get my motor built in the future, goal is 300-350 whp. I was wondering how much can a stock type R valve train handle?...will my goals for horse power be too much stress on the components?, just needed some info on how i can maybe use the stock valvetrain or maybe change out things like retainers and valve springs.

Thanks.

FlamingEJ20

depends on how high u wanna rev.

R-1303

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FlamingEJ20 &raquo;</TD></TR><TR><TD CLASS="quote">depends on how high u wanna rev.</TD></TR></TABLE>

Full Redline 8600-8800 rpm..don't planning on raising redline too much.

PM-Performance

you will be more than fine . im still on the stock head 100%. and mine has been taking the beating for a while now.

metal-x

you'll be fine with the stock ITR head, just watch your revs

PM-Performance

even with the revs. i have went out 9k many of times.

metal-x

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">even with the revs. i have went out 9k many of times. </TD></TR></TABLE>

do you have ARP head studs?

PM-Performance

I do now , but i didnt before when i was doing those revs.

R-1303

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">you will be more than fine . im still on the stock head 100%. and mine has been taking the beating for a while now. </TD></TR></TABLE>

I know to get head studs..so its pretty safe to take it up to 8600-8800 rpms and with 300-350 whp? i was afraid the stock ITR heads couldn't handle such a beating?

R-1303

anybody else what to chime in?

turbotypeR@SPEC

i have been pounding on mine for about three years now.it has taken 9000rpm banging off of the rev limiter with 534whp and no problems yet.i have seen as high as 9300rpm on the recall.on a side note,my last setup had the wastegate lock up and went to 60+psi.cracked all four sleeves,burnt all four pistons,and the valvetrain,head, and head gasket were fine,all with stock head bolts that had been re-used three times.i think the stock head bolts are better than the arp

R-1303

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbotypeR &raquo;</TD></TR><TR><TD CLASS="quote">i have been pounding on mine for about three years now.it has taken 9000rpm banging off of the rev limiter with 534whp and no problems yet.i have seen as high as 9300rpm on the recall.on a side note,my last setup had the wastegate lock up and went to 60+psi.cracked all four sleeves,burnt all four pistons,and the valvetrain,head, and head gasket were fine,all with stock head bolts that had been re-used three times.i think the stock head bolts are better than the arp </TD></TR></TABLE>

Thanks!..with this said, and your amount horsepower, i will be confident now in keeping the stock head "stock" valves, porting, etc....and daaam! sorry about your mishap, and congrats on your amount of hp!..i only plan to hit 350 max.

turbo_ef9

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbotypeR &raquo;</TD></TR><TR><TD CLASS="quote">i have been pounding on mine for about three years now.it has taken 9000rpm banging off of the rev limiter with 534whp and no problems yet.i have seen as high as 9300rpm on the recall.on a side note,my last setup had the wastegate lock up and went to 60+psi.cracked all four sleeves,burnt all four pistons,and the valvetrain,head, and head gasket were fine,all with stock head bolts that had been re-used three times.i think the stock head bolts are better than the arp </TD></TR></TABLE>

woah..