experimental vh45de super short block

[FandGMotorsports]

i did some readin in this forum a few weeks and was inspired to find an affordable solution to the vh internals. the crankshft is alreay top-notch and the block has all the nessarcy reenforcement i found that people wanted to use a 400 small block rod with a 305 piston the rods are roughly $619 bucks from summit for an eagle h-beam, the pistons are super common but afforable forged 305 pistons only come as a flat-top 4 valve releif, this is going to give a high compression ratio due to the extra bore and having similar valve releif sizes, also i had a block sonic checked and found that a .075 overbore isn't going to work (safley) (by the way the .075 would put the block in the realm of a stock 305 piston) also the rod discussed in the previous vh forum is too short and the piston won't clear the counter weight, at least without some extra machining, plus the 5.565 rod length would decrease the rod ratio. i was inspired by the information found in this forum to start in with more research. i found a good custom piston supplier through my speed shop i run but wants 80 pieces (10 sets) to make the order. i already bought one set but they cost a fortune. i know this motor has huge potential but need to lose to the cast pistons to get the extra power. the only obstical that ive found is grinding the rod journal down .060 to fit the chevy rod and having the rods slightly narrowed. the pitons have the light .043 ring pack and use the easily obtainable chevy pin, you could even use the H-series bearing for extra abuse. what does everone think?ent...this is what i found..

[Mettler]

Sounds good man. I'd just like you to elaborate a little on your comment regarding losing the cast hypereutectic pistons to get the extra power.

Is the piston you've found lighter, or heavier? Because if it's heavier, then the only added benefit is strength with the tradeoff of increased rotating mass, really only necessary in a boosting application.

Please clear this up for me, cheers

[FandGMotorsports]

the forged piston i'm using is a lightweight forging, they use the 2618 aluminum that is super strong and super light, also using a common chevy rod you would have the advantage of using a lightweight I-beam with small 3/8 cap screws that would be stronger and lighter than stock.

[FandGMotorsports]

also someone may want to have a BME aluminum rod made that could really lighten the reciprocating mass up even more. combine that with the longer rod and my light weight forged piston and 10,000 could be a possibiltiy. i'm studing to be an engineer im school and my real passion is for cars

[Mettler]

Aluminium rods are not suitable for long term use, they have a relatively short lifespan in comparison to a nice forged steel rod.... and to make 10,000rpm a viable goal, you'd need to cam the heads so hard that there would be literally no bottom end or idle.

Though there are definitely benefits to be had from lightened internals, 10,000rpm is probably not necessary :p