**600hp sbm block limit? Or is it bs!!**

YoungBlood said
I would like to hear more "Main Cap Walk" horror stories with these 4 inch Stroker SB's. There's some pretty fuckin tall tales out there, with little realistic (or convincing) proof, that these Stroker's aren't reliable enough to drive daily.

Mad Dart said
Exactly, alot of "talk" even from the "Heavy Hitters" on this site claiming that a Small Block Mopar is Done at 600HP, has cylinder wall movement and cap walk when using a stroker like it should be used which is "driven".

Oh wait.....

Having 600hp and DRIVING it.

That's different than having 600hp and USING it at 600hp. . .

pink340swinger said
I had a 1970 340 block that I raced and it eventually made 602 HP on the dyno. I ran it for several years until the main webbing literally split the block in half! It had 4 bolt mains installed and all the other tricks done to it but it just could not handle that power run after run. It did run 9.50s @ 138 MPH shifting at 7900 rpm. 3.58 stroke crank in it. Naturally aspirated. I had a lot of passes on it over the years and refreshed it every year at the end of the season. It started out with W-2 heads and then W-5 heads which made way more power and it only lasted for 40 runs when I went that route making 602 HP. I have since went to an R3 block W-9 heads and have never looked back.

Never had a lower end issue, however using mounts did show a issue..

More issues with keeping the heads on, using studs tq'in them higher, that was also the reason to move to the r block.

However on your 4 bolt did you use a splayed 4 blt with the center studs or did you use the 4 studs.