3 replies to this topic

[micrawavewindow]

hi i am gonna have some money coming soon and i have just bought a full stage one kit and now i am thinking of putting a stage 2 3 or 4 head from mini sport on my 1275 but its does not say anywhere how much performance i am likely to get so i dont know which one to get because if i get the stage 2 i might be wastin my money. just wondered what people had experienced from there car

[Bungle]

depends where you buy it from

everyone that sells moded heads has a different idea what the states of tune are

the likes of minispares list what you get for you money in each state of tune

[Ouster]

If you read the article on the front page, you'll find this:

Stage 1 - Simple gas flowing, ports, skimmed
Stage 2 - Chamber modifications, serious porting
Stage 3 - Big inlet OR big exhuast valves
Stage 4 - Big inlet AND big exhaust valves
Stage 5 - All the above plus special things like angled guides, etc


Is there a disadvantage to running incredibly large valves (e.g. 31/37) in a head?

[01smartc]

Our System is similar to that.. the basic specs are below, all come with 3-angle seats and skimmed to desired CC

Stage 2 - Ported and polished, std size Valves
Stage 3 - Ported and polished, 29.4mm x 36mm Valves
Stage 4 - Ported and polished, 31mm x 36mm Valves, bronze guides and slightly stronger springs.

Power differences between them, all running the same cam/spec is around 4-6bhp

Chris @ Smart Performance

Edited by 01smartc, 08 February 2010 - 09:36 PM.