11 replies to this topic

[malcs_miniturbo]

hi ive just got a complete genuine metro turbo engine and i want to refresh it with new gaskets clutch ect.im also want to change the cam but dont no which one to go for .i will be tuning the engine but keeping the 1275 bore as its done 40k.help with what cam be greatful so i can order one.

[mini13]

you dont really need/want anything special in a turbo lump,

good upgrades would be.

MG metro cam,
Kent 266
Avonbar Phase 2

keep the duration below 270deg

[miniadventure]

The avonbar Phase 2 is a very good cam

[malcs_miniturbo]

The avonbar Phase 2 is a very good cam

ok how much is the avon bar cam .i want a kent cam vernier setup as well would this be ok?also on the avon bar cam what increase do i get sorry for the questions

[cherryblossom]

avonbar are the best place to ask for a price

gains wise i'm not sure how much just a cam will give you, i've always fitted one at the same time as doing lots of other mods but i can say they're definately the one to go for. Kent vernier will be fine too, will mean you can time it in exactly and get the most from it.



*edit bud666 not cherry*

Edited by cherryblossom, 18 December 2010 - 04:39 PM.

[1380sprint]

i heard an Sw5 produced good power on a guy from my old club,
seemed to drive well too.

[malcs_miniturbo]

i heard an Sw5 produced good power on a guy from my old club,
seemed to drive well too.

cheers il give them a call tomz see how much

[Sam Walters]

i heard an Sw5 produced good power on a guy from my old club,
seemed to drive well too.

cheers il give them a call tomz see how much

The mg metro cam is a better camshaft for your uses.

[Ethel]

We don't know what his uses are. If it's for the road I'd go for torque, Metty turbo engines are over equipped for making power, getting them going is the issue.

[malcs_miniturbo]

We don't know what his uses are. If it's for the road I'd go for torque, Metty turbo engines are over equipped for making power, getting them going is the issue.

im keeping the standard bore 1275 il get the head ported and polished ,roller tip rockers ,double valve springs,kent cam vernier, ported exhaust man uprated actuator and alloy intercooler avon bar cam sounds a good popular choice which im going to go for.to be honest i havent started the strip down of the engine yet but if funds be and the bores are no good i might over bore to 1293 but il see cheers guys il post my build pics soon

[Sam Walters]

Good stuff.

The SW5 is a good cam in N/A applications that are built for "comfort" Yes it has a low duration but its a relatively high lift camshaft so presents good valve curtain area at low valve lift.

However in turbocharged and indeed your application were blowing the charge into the cylinder. A little more time to open the valves per engine cycle would be beneficial. So a little more duration.

However normally with duration comes overlap, where both the inlet and exhaust are open at the same time. You don`t want to be blowing your charge out through the exhaust valve now do ya?

The normal metro cam or turbo camshaft has more duration on both the inlet and exaust then the SW5 with less overlap. A little less lift admittedly but this is more then compensated with the boost pressure.

It is a good camshaft for perhaps 120bhp, I must admit though, this is not out of my own experience. This is from what others have said about thier builds.

An mg metro camshaft has proven well to 150bhp with the odd case of more being attained. Of boost it should drive like a production car providing you keep your compression ratio sensible.

The phase two has a little more bit would seem them both of those, quite a lot more in fact. I`m sure the guy with a red club man on here. Im sure he runs one with a gt20 turbo and has near on 200bhp.

Edited by Sam Walters, 19 December 2010 - 03:21 PM.

[mini13]

However normally with duration comes overlap, where both the inlet and exhaust are open at the same time. You don`t want to be blowing your charge out through the exhaust valve now do ya?

With a turbo you are likely to be seeing around double the boost pressure in the exhaust manifold, so what happens is reversion, the exhaust gases going back into the cylinder and working against boost.