how fast can i spin my balanced shortblock??

[Mean88]

I have a fully balanced motor consisting of stock crank turned(.10), rods, and new forged pistons. the rods have arp hardware, and I am going to add a girdle this winter. I have roller rockers, aftermarket cam, ported p heads, ported intake etc. The car pulls hard past 6k, and I have the tweecer hardware so I can disable my rev limit. also, I am running nitrous on it. I have been hitting it with a 100shot, but I am going to step it up to 200. Right now my window switch is putting it on for 3000 to 6000 rpm. Can I shoot higher??
I have a buddy that spun his completely stock 5.0 to 7000rpm, but the stock rockers flew apart. What am i capable of with my combo???
Thanks.
Ted

 

[jaidedeye]

i have ecu mods to remove my rev limiter. i have gone as far as 7k rpm on my motor with no problems. my car pulls to roughly 6700 rpm

 

[mackey]

A dyno will really tell you how high you can spin your short block. Without knowing the details on everything from the block type to cam and specifics on rods, I cannot really help you.

 

[Mean88]

Stock block, magnafluxed, bored .030, honed, painted. aluminum girdle, stock crank,stock rods(with arps) speed pro forged pistons, everything balanced. 10:1 comp with ported gt40 p heads, crower #15511, .468/.486 218/224 dur @.050 114 lsa, Cam has 6*advance ground in, 1.7 Roller Rockers, 70 mm tb, 30 #inj, welded and ported Explorer intake, longtubes, off road h, ultra flows, dumps

 

[dirtracer]

I wouldn't be afraid to go to 7000rpm with that short block, but with the small cam, I don't think you'll need much more than 6000rpm.

 

[mackey]

I would seriously talk to the person who built the engine. Not folks online. But yes with a small cam like stated you don't need to go that high. I wouldn't go over 6k with the stock block anyway if you want it to last long, but that is just me. The main girdle isn't going to strengthen the block. All they do is keep it together if the block cracks down the middle so you can reuse some of your internals.