Guy, I'm milling 0.050" from the head and I'm going with no shims. I will drill the cam and use the SBC offset bushings to set timing and I'll adjust the guides to get the tension right. I am told this procedure works fine. I hope so...

http://www.summitracing.com/parts/cca-4760

That's right, you told me that before.......you'll love that set up Jeff....lots of low end torque! Good luck.....post pics of the mods.

I'll be looking forward to a thread about the new engine. My mechanic has F1 experience and likes fast-reving engines, he suggested something like this. Of course it will have to wait til I have a big project to work on, no money now. It's a little over my head but I won't be doing any real work - no place to do it.

Also I'm running a Y70 on my 240 - so Oz's build thread was also a big help. I'll start a thread asking about cams etc (got stock C211 cam, nice flat torque line but quits about 5000 rpm, dunno what others are using) for the Y70 after I think about it some more.

I was playing with the engine calculator and it looked like the chamber size had to be pretty small to get the CR up. What size chambers are you running.

I looked at 40cc chambers and it put me over 10CR. Now a lightened flywheel, triples and a large cam might really make a rev machine.

Congrats on making this work. There's a lot of emphasis on bigger is better, but sometimes it's not about that at all.

I just re read the thread -9.2 to 1

Personally I would have done 10.2 to 1 with that cam, but again thanks for sharing. I just received a L28 bare block and it makes me think about it!

I just received my new .040 over ITM pistons......they're beautiful.....look like factory Nissan. If you need replacement pistons for your Z's or 510's, use these pistons. Let's keep a good supplier of pistons for our cars.

If I went this route I would step up to forged -rev rev

Guy,

Where did you buy your ITM pistons?

The Nissan dealership in Roanoke. You can usually find the ITM ad on eBay though.

Guy,

Where did you buy your ITM pistons?

I put flat top ITM pistons in my street L28 and I got them from Black Dragon. I think they were $240 for the set with rings. They carried std and oversize at the time. I assume they still do.

Spruell Racing in Atlanta can probably get 'em also Jonathan.....they're in Atlanta......great folks to work with ......I buy my Panasports there....$150.00 cheaper than anywhere else. The ITM's are nice....aren't they Jeff?

My ITM pistons were great, but I should have thrown the rings away. I'm guessing it was a Black Dragon cheapness rather than an ITM problem, but the rings weren't individually packaged by piston like every other ring set I have ever bought. They were literally all together in one bag with no instructions as to groove positions or top/bottom orientation. They also didn't match any bevel/notch design I have ever seen, so it was anything but obvious. I took my best guess at it and threw them in. I'm convinced better rings would have increased my performance. At the time, I was in a hurry and I didn't have time to order a new ring set. That was about 10 years ago.

I have not heard of any such problems lately with the Black Dragon piston/ring sets, so I think they got their act together.