Bradan 365 BB service

Good stuff there Bradan. 8 and 12 grams in the valves difference should not change things a ton for stock cams but anything more radical than stock cams I would install springs with a bit more seat pressure. Stock seat pressure is something like 65lbs and I think 90lbs would be adequate to control the valve with any other cams. I noticed in a motor I ran P6 cams with that the valves bounced anywhere north of 6500-7k range with stock springs. The spring locators were beat to heck when I took the things apart.

 

Nice work

 

Thanks alot for the valve weight info!

I would have thought 4/10 of an ounce (12 g) additional weigth for the exhaust valves would have be significant,,, but perhaps not.

I'm glad I asked.

John

 

This is a funny comment considering some of the best engine builders in North America are GM engine re-builders/builders who happen to also do machine work and engine building with Ferrari.

Anyhow....very neat threads from the guys at Bradan. I have been following quite a few. Being in CT, I'd love to visit the facility at some point!

 

Fantastic thread indeed. Bu regarding the earlier comment about lowly GM builders knowing to check runout on even new valves I have to disagree. Time and time again I hear machinist tell me that because the valve is brand new they just install it and call it good. The horror.

 

What steps are you going to follow to refinish the wheels? They're magnesium, right?

 

I am also curious regarding this. I have never trusted myself to refinish Mags as I believe by definition magnesium is a very porous metal meaning it has all kinds of gaps to fill or air might even leak through. I believe this is the same reason the inside of the Boxer engine case requires the special coating of 'stuff'.

 

Question's about the shocks.

Are they factory adjustable? Cant see from the pic.

If not, when you have them re-built, will you make them adjustable?

If adjustable, can you raise and lower vehicle height at each corner to level everything out to some degree?

 

Yes, when they rebuild, you can ask for them to be made into adjustable. I have heard that from other forum members.

 

Fantastic to see you're respecting the DOW-17 on the Mag wheels !!!

 

Note the green-ish coating on the Mag wheels. That's DOW-17. This coating has made possible the practical use of magnesium for aerospace and commercial applications. The challenge is to fix this coating if removed - and to fix it right! Got to follow the Mil spec 45202 for proper treatment baths chemical composition and temperature for best results.

 

For those on the U.S. East Coast needing Dow 7 work on mag wheels, I used this firm to recoat some original mag wheels off a 427 SC Cobra. They do a lot of work on aircraft parts too.

Jessica Cartelli
Business Development Manager
PTI Industries, Inc.
2 Peerless Way
Enfield, CT 06082
tel: 860-698-9266
fax: 860-698-6762
[email protected]
www.ptiindustries.com

 

You can adjust the damping rate by how many turns the shock head is out for softer or firm thats it, you can also add or delete shims in the shock where it attaches to the eye bolts for some raising or lowering but not much

 

You got it to bare metal by chemical stripping only? No media blasting?