1507 numbers

[R/T]

Jonny Hotnuts, you have pm and email

[Competition CNC]

Let’s say the bore offset is 1/2" when measured from the top of the block (this seems like a lot but just using it as a # and the offset is not done more than what the head could handle or what is common for offset blocks).

I am only curious to know if the offset that a block offset measured .5 at the top of the block and have the bores drilled at an angle so there would be zero offset at the base of the block. This would mean the cylinders were at a slight V (maybe only a few degrees) as apposed to parallel to each other. It is true that the cylinder walls would be thin at the base of the block but for some reason I thought it was the offset and parallel relationship to the crank that made it really hard on bearings. For some reason I got in my head that if they were a few degrees V’ed then it would be easier on the bearings.

If I'm following you correctly I dont see how that would work.....   ????

[Jonny Hotnuts]

It looks like to me that the offset bores would change timing a few degrees due to a change in TDC in relation to the bore to crank.

If the motors TDC was at "0" and the bore offset moved two pistons cylinder bores 2 degrees (guess) forward and 2 cylinder 2 degrees back from center the motor would be firing the back cylinders early and the forward cylinders late.

I would think that there would need to be a timing compensation if the bores were moved....or if the cylinders were in a V, TDC would stay the same.

Again I am just thinking this and dont really know if this is valid.

[gazza414]

JHN's...you mean one of these offset blocks??

[ACE23]

nice lookin motor you got there I'm in the home stretch of a turbo project but I've always thought built up N/A motors were really cool...just never got a chance to ride one

[Competition CNC]

OK, Now I see what your getting at.  Like the VW  VR6 engine but not that much ov a V?   The head would be a problem.  It would need a new head and block.