RS Motorsport :: Classic Speed Restored

Roger,

this has been discussed here in lots (and lots) of detail...

http://speedtalk.com/forum/viewtopic.ph ... ght=groove
http://speedtalk.com/forum/viewtopic.ph ... ght=groove
http://speedtalk.com/forum/viewtopic.ph ... ght=groove

http://speedtalk.com/forum/viewtopic.ph ... highlight=
http://speedtalk.com/forum/viewtopic.ph ... ght=groove

The last 2 have quite a few pages....

Not sure if you know of this forum, but it has a wealth of knowledge, mostly related to V8 gear, but the cylinder head porting guys are class leaders..

I have been readin the topics/disccusion for over a year now, although to be honest, a lot of the theory goes over my head.

Just do a search for Singh or groove and you will get your results.

I have often too wondered if any of you guys were using this as I have played with it on one of my heads...

Shaun.

Well...........

In a crossflow I recon u pretty much wasting your time.

In a 15 to 1 ..........say........ pinto with super raised pistons, there could be some merit.

I feel at this point, the pistons would be better grooved to accomodate combustion.



http://www.popularhotrodding.com/tech/0 ... index.html

I haven't got time at the moment to go through all the text as I'm assembling my engine again but the idea of grinding flame slots is an extremely old one which came out of aircraft in the 2nd world war to promote flame propogation and stop detonation when you increase the compression as all the gain you will see in drivability and power is coming from the compression increase and not the slot as the slot is promoting an even fire
The best example would be the use of lumpy top pistons in a pinto when you have to fire the spark around the corner of a lump if you were to mill a slot through the middle you are accomplishing the same thing but you still can't beat using a smaller chamber and a flat or dished piston

Danny