swift700

iTrader: (3)

The piston spec sheet said the pistons are 3.9015 but they miked a little bigger than that. Sorry about the confusion, I was trying to describe the piston as advertised.

All the machine work was around $1100 and that included sizing the rods. Everything costs a little more in Canada, we have to pay for all that healthcare and unnecessary government, you know.

I'm not going to drill the lifter trays. I figured if it was that important then GM would have modded the Gen IV trays with holes in them. Although the trays are new, the plastic seems a little thin. I'd hate to weaken them any further, especially up here in such a cold climate. They serve a pretty important role and I don't want to compromise them.

Keith

I'd hope for a little tighter quench than that .051 you've got.

Other than that, It looks like a lot of fun!

Wilde Racing

iTrader: (26)

Yea I seen that too.....

swift700

iTrader: (3)

I expected the deck height to be a little less. I think quench kinda goes out the window with dished pistons anyhow.

Wilde Racing

iTrader: (26)

The quench pad is still there just smaller. Who knows if there is any benefit with that big of a dish and that small of a pad.....

swift700

iTrader: (3)

Boy, you guys miss nothing around here! Who knows if it'll matter? By the way, what is a good quench height for an engine like this and how would it affect things? That's one thing I'm not too up on.

Wilde Racing

iTrader: (26)

.035-.045 piston to wall will affect how much, I've hear of tighter, .030 and under but I think I set mine at .04

swift700

iTrader: (3)

What are everyone's thoughts on using a .040 head gasket to increase quench while bumping the compression to 9.8:1 or so? This has crossed my mind many times. Am I asking for trouble?

Keith

Very good point.

I got introduced to this subject on Yamaha RD engines and the squish band is small on them, but it does make a difference.

I guess I'm just thinking out loud here.

I think I'd talk to a professional engine builder about that, but I'd go for it.

swift700

iTrader: (3)

I did a recalculation. With a .040 head gasket I'd be looking at 9.92:1 CR with this engine. This seems like it's getting a little high for FI. Of course, the power out of boost would be better along with better squish. Can these engines run that CR with boost on pump gas?