701 head fit on 760?

[Brooksinct]

I have a stock 701 and a 760 with a factory pipe. I want to be able to put my stock 701 exhaust on the 760 and put the factory pipe on my 701. My question is can I do this if I take my stock head off of my 701 and put it on the 760 will the stock 701 exhaust work on the 760? I will then buy a aftermarket head for my 701. Or if someone has a stock 701 head they want to sell that would be great. Thanks for any help.

 

[OCD Solutions]

The 701 and 760 heads are different, 81mm versus 85mm dome width. I have a stock head for both, 701 and 760, $65 shipped for either if you are interested.

You may need to install timecert or helicoils into the 760 cylinder to accept the smaller manifold bolts. The 61X cylinder will have 8mm bolts and the 62t will have 10mm.

 

[Brooksinct]

So I had heard that if you put a 701 head on a 760 it increases compression but is the bolt pattern the same? Has anyone ever put a 701 head on a 760 and used the stock exhaust off of the 701?

 

[WaveDemon]

the bolt pattern is the same.

 

[Brooksinct]

So no one has done this?

 

[OCD Solutions]

So no one has done this?

Done what? Bolt the wrong head on the wrong engine? I'm sure it's been done before but the dome shape is matched for the diameter of the piston to give ideal squish and volume. There was talk about different year 701 heads having different cc's and netting more/less compression than others so that might be worth investigating.

The best example I can give is the sizing chart for cc's corresponding to replaceable domes in the billet heads. There are multiple cc's available in each size but there are specific domes for each of the 701 and 760 engines, if they were interchangeable I'm sure they would offer a one size fits both lineup and they don't so draw your own conclusion.


http://www.blowsion.com/detail.asp?PRODUCT_ID=UYACH1925
NOTE: STOCK 701 Cylinder is 81mm)
Compression chart:
82mm chamber 701 (61X) no porting @ sea level
29cc=230psi*
31cc=210psi*
33cc=195psi*
35cc=185psi*
37cc=170psi
39cc=160psi
* = must use 100+ octane fuel (NOTE: STOCK 760 Cylinder is 84 mm)
Compression chart:
85mm chamber 760 no porting @ sea level
32cc=225psi*
34cc=215psi*
36cc=195psi*
38cc=185psi*
40cc=170psi
*= must use 100+ octane fuel

As for the exhaust, I think you are good to go on that one with no real issues other than the manifold bolt sizing. B-pipes are run on many different displacement engines well up over 800cc's so i don't see why the stock exhaust would be much different, on stock setups anyways. Results may vary from setup to setup but it will still work.

 

[Brooksinct]

Thank you