turbodriz said:
Guys.... who nitrides cranks? When tony runs 10.2 he is at 1,000hp? Is 11mm lift interference if the timing belt breaks? I thought that one of the problems with our motor was the space between cylinders. I thought it was hard to get a good seal from the headgasket at the boost levels required to make this type of power? Our is there a cure?
Most any metal treatment facility does nitriding, or you can send the crank to me. I think Tony is on a gm auto now. An 11 mm cam "can" be interference depending on the dome of the piston or if the seats where raised or not during the head work. Each application of a large cam is different.
A seasoned block that has had no prior work and is still straight is getting hard to find. A new block will be a late model block and come with a new late model crank. Two birds with one stone. IJ can tell you why it is a good idea to start with a new head. Straight, true, and has had no prior work done to it.
Gary, in Malta, is currenty running over 1300 hp on a 7m with less work into the block than I had written.
With proper prep work and a good tune, there is no reason that 45 -50 psi will not seal on a 7m.
For intermitent use 1000 hp, any aluminum radiator and electric fan set up will be enough.
I don't think that anyone has tested the r154 to this level. How long it would last would depend on how hard you abused it, what kind of condition it was in before hand, and what style of driving you plan on using your 1000hp.
Ask Duane how much it will cost to do a reliable r154 and clutch set up. You may have less money in a GM th350/400 swap.
