V-8 Int. man. design

Evert Rosseel Evert.Rosseel at rug.ac.be
Wed May 28 07:50:52 GMT 1997


> > If you have a LOT of money, you can also :
> > 4 - install a different crankshaft, so that it fires like two 4 in
> > lines connected in V Although this seems strange, it is done on some engines (Ferrari does for example) because the same effects of (unevenly) 
> timed flow also come into play in the exhaust. An equal firing interval 
> for each banks gives best performance because it allows the use of tuned 
> exhausts. The disadvantage is that the engine balance is badly influenced 
> (4 cylinder like instead of V8).
> > 
> 	 No I don't have a lot of money but have been extremely 
> interested in using a single plane (180 degree) crankshaft. As you have 
> mentioned exhaust tuning is the benefit and four cylinder buzziness is 
> the down fall, also the car wouldn't sound as if it had an American V-8 
> in it,(SLEEPER), but I haven't seen any commercially available with cam 
> shafts to match. 
> 	Have you or anyelse seen these cranks for the Chev little block?

No. I will check again as I don't have the information with me. 
I have seen some inlet manifolds with seperate inlets for all 
cylinders for the little block. I think it was made by Edelbrock, 
they can be found on the web at 
http://www.edelbrock.com/edelbrock.html :
I will check my documentation and mail you if I find anything more 
specific.
(We have been looking for inlet manifolds of this kind for our big 
block engine, but have been unsuccesfull, as we have oval inlet 
ports instead of square ones required by the manifolds we found.)

BTW, if you use a single plane crankshaft, you also have to change 
the exhaust manifolds, as they should be optimised for the uneven firing interval.


Evert
****************************************************************
*    Dr. ir. Evert Rosseel                                             *
*    Laboratory for Machines                                   *
*    Department of Mechanical and Thermal Engineering          *
*    University Gent                                           *
*    Sint-Pietersnieuwstraat 41, 9000 Gent, Belgium            *
*    Tel : ++32 9 264.33.06                                    *
*    Fax : ++32 9 264.35.86                                    *
*    Email : Evert.Rosseel at rug.ac.be                           *
*    WWW : http://allserv.rug.ac.be/~erosseel/motoren.htm      *
****************************************************************



More information about the Diy_efi mailing list