Strengthen the Stock SB to handle 500whp?

KBCobra95 · Mar 17, 2006

I'm pushing 465 rwhp right now and was wondering what I could do to give my stock shortblock some strength. Are swapping to ARP Rod bolts a good idea? How about a main girdle. Valley girdle? How hard would it be to swap out the rod bolts? I hardly ever drive the car, but even when I drive it I hardly ever take it past 5500 rpms. The only time it goes higher is when it is on the dyno (6200).Thanks!

69clark · Mar 17, 2006

Well I am using all ARP fastners throughout the engine and I bought a DSS main girdle. I am not using a valley girdle but I don't think it will hurt, just not sure if the cost offsets its purpose. I haven't really looked in to them. Not to sure of anything else you could do, but I think what you mentioned should help.

95cobraguy · Mar 18, 2006

if u really wanted to change the rod bolts u could if u dropped the oil pan. u could change them one at a time.

Killercanary · Mar 18, 2006

General concensus is that valley girdles are a complete waste of money. Your lower intake serves a very similar role.

Honestly, there is very little that can be done to the stock roller block to strengthen it. Power and RPM are what kill them, but its more RPM than actualy power that does them in. Keep the revs where you are and if the tune it right it should last a long time based on how you said you drive it. I've seen nothing concrete that main girdles help a whole lot. Having said that, I would still run one if I was using a stock block in a high HP and/or high rpm application. I do think they help with crank walk to a point.

4Jenna · Mar 18, 2006

The block is a lost cause (u are at the "safe" limit)..its your stock internals that could be upgraded..I'd worry about your rods more at this point than your block and yes the arp hardware will help. Some say the girdle helps..some say it doesnt I run one.
Killer hit it on the nose...keep the rpms down and enjoy it.

KBCobra95 · Mar 18, 2006

Thanks guys!. Eades, you relived a great deal of worry from me. Thanks again!

4Jenna · Mar 18, 2006

Dont feel bad I'm over 600rw on a stocker (block)...GULP!

Yobi1Kanobi · Mar 18, 2006

your nuts

Moderate boost on a t-trim huh eades.

4Jenna · Mar 18, 2006

haha yeah...sucks I have to leave hp on the table

95cobraguy · Mar 18, 2006

eades5.0 said:
Dont feel bad I'm over 600rw on a stocker (block)...GULP!

how longs that been goin on? and more importantly, how long do u expect that to last?

4Jenna · Mar 18, 2006

I made 457 for 2.5 years, then 544 for 2 or so years, 580 for 6-7mo and latest dyno was 643rw all the same block just progressing with my hp hunger...I did wuss out and detune quite abit outta the car last week though.
It will last as long as it wants I suppose...thats way it goes once u get 450 and up..anything can break.

KBCobra95 · Mar 18, 2006

eades5.0 said:
Dont feel bad I'm over 600rw on a stocker (block)...GULP!

What is your combo!! I feel the same way you do about leaving HP on the table...I'm only at 7lbs boost

4Jenna · Mar 18, 2006

331 (8.5 cr)
TFS Heads worked
Holley Int worked
Cam Motion Cam
1 3/4 LTs
TKO600
60lb injs (full fuel sys)
T-trim

Strengthen the Stock SB to handle 500whp?

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