27 replies to this topic

[1977 Loud_Mini]

When i had my 1380 engine with a 296SP camshaft i was running the standard 1275 head and it was easy to drive. Now put that 296SP into a 998cc and thats when it became a little hard to drive, for me that is :)

Evan.

[86mayfair]

Beej, was that 74 at the fly?

I'd like to build a 1293 with
36 and 30mm valves and well ported,
1.5 rockers
Balanced bottom end
Twin hs2s (or maybe hs4s?)
An sw5 cam or maybe 266
Maybe a slightly lightened flywheel

Any rough ideas on what that will give?

[Beej123]

Beej, was that 74 at the fly?

I'd like to build a 1293 with
36 and 30mm valves and well ported,
1.5 rockers
Balanced bottom end
Twin hs2s (or maybe hs4s?)
An sw5 cam or maybe 266
Maybe a slightly lightened flywheel

Any rough ideas on what that will give?

Yes, that was at the fly.

[Joseph-C]

Beej, was that 74 at the fly?

I'd like to build a 1293 with
36 and 30mm valves and well ported,
1.5 rockers
Balanced bottom end
Twin hs2s (or maybe hs4s?)
An sw5 cam or maybe 266
Maybe a slightly lightened flywheel

Any rough ideas on what that will give?

from what I've read on here I'd say atleast 80; compared with the engine beej123 RR'd which got 74 having a better head would probably get you to 80

[Spud_133]

My specs are
1293
Block decked to the top of the pistons, head matched
Stage 3 head
Twin hs2s
Rc40 & lcb
Megajolt
266md
Balenced

What's power does a standard 998 have?

[86mayfair]

Sweet I thought it would be about that. I want a nice, useable, quick car.

*I forgot to say about 10:1 comp ratio and I'll be using a maniflow system or an rc40 with a maniflow manifold

Edited by 86mayfair, 11 May 2012 - 10:14 PM.

[jamiestevenbell]

about 47bhp and i have a 286 cam in my engine i use one the road and i love it, the hardest thing i find is the heavy clutch lol but im running 94bhp atf 81 at the wheels

[86mayfair]

47 for a standard 998? I wish! It's more like 35 - 40

[Joseph-C]

Sweet I thought it would be about that. I want a nice, useable, quick car.

*I forgot to say about 10:1 comp ratio and I'll be using a maniflow system or an rc40 with a maniflow manifold

If your looking to save money you'd be fine to use a HIF44 they're supposed to be good to about 95bhp.

about 47bhp and i have a 286 cam in my engine i use one the road and i love it, the hardest thing i find is the heavy clutch lol but im running 94bhp atf 81 at the wheels

what are your engine specs?

EDIT: wikipedia says 38 bhp for a 998

Edited by Joseph-C, 11 May 2012 - 10:32 PM.

[1275john]

So basically I need a 276 max (any one got one they want to swap lol ) as for the head will a well ported mg unit do the job

[oltonlad]

kent 266 and 276 cams are getting difficult to find secondhand as they are the preferred choice of cam for road use, i was lucky with my 266 as it was a chance find, they do crop up from time to time....i know someone who has a complete brand new 276 cam kit but that will be mine when he comes to sell it as his project isn't happening anymore.

[1275john]

ok i found the markings sp on the cam does this meane scatter pattern ,if so what is a scatterpattern?

[racingbob]

read my thread i just put up

(mg metro cam) yes mg metro head will be good and some porting