I'm wondering what the stock block can handle as far as rpms, Do you guys think it'd be safe to rev up to 8,500-9,000 on a stock gsr block?

 

if you make power to 9,000 rpm then it would be in your best interest to replace the valve train. 8500rpm should be ok not all day though.

 

yeah i'm gonna replace me valvetrain and cams so i'm just wondering if the crank can be revved higher also

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowsleeper &raquo;</TD></TR><TR><TD CLASS="quote">yeah i'm gonna replace me valvetrain and cams so i'm just wondering if the crank can be revved higher also</TD></TR></TABLE>

Yes, it can....

 

It can take 8500 all day, my friend's took it for a couple weeks before we put the new valvetrain in. Ran like crazy.

 

how about to 9,000 rpms ??

 

Why take chances?? Would you rather put in springs and retainers or ruin a good motor.

 

he said he iss doing springs

all you need are springs. trust me

i think that it can do 10k for short time

9500 shift point all day is what i would do

my semi built is gonna see 9500

 

so, let me re-write what i think everyone is saying.

stock gsr bottom end can hold up to 9500rpm? (yes, we are considering that the springs, retainers are upgraded)

 

A gsr bottem end should be able to stay together a 9,000 rpms no problems.

It maybe be able to handle a rev limit of 9,500 for short periods but I personally wouldnt do it alot w/o forged internals, and upgraded rod bolts, etc.

How many people are making power to 9,500 and still running a stock block? There isnt much compression on a stock block and your gonna have a hard time finding power past 8,500 w/o some more compression. (to compensate for the big cams its gonna take to make power beyond 8,500 and also your going to need some head work if u wanna make power above 9,000.

I wouldn't worry about going to 9,500 rpms unless your setup makes power there. 9,500 is hard on a motor, and will lead to premature wear, and if u dont need to be there then why spin it that high?

 

so a jdm gsr motor with just basic bolt ons can be shifted at 8500? i usually shif right at 8k and it kind of feels like i still have a little more power to go, but i still shift at 8k.

 

most likely I'll just be running up to 8,500 rpm, my rev limit is at 9,000 but i doubt i'm gonna be revving it up that high. I'm gonna be running those buddy club 3+ cams so around 8,500 might be the max..

 

8500rpm np...on gsr block