COLEYST200

iTrader: (3)

Im looking at a set of cosworrth mahle pistons that are running about 10:1 compression with big valve cut outs . but wot i need to no is 10:1 compression ok for about 380 BHP on a T34 the cut outs are a must as i will be running a BD14 inlet cam

Rsmat

iTrader: (2)

mahle are you on about mate ?

COLEYST200

iTrader: (3)

sorry mate yes mahle im not very good on the spelling

PAUL S

iTrader: (8)

10.1 is normally aspirated comp ratio, I doubt you could run a turbo at that level or those cams. 8.1 is the standard level, the rally cars ran higher but had top spec management controlling it all

Martin-Hadland

iTrader: (2)

Are you sure they're 10:1 Ian??

gjh

10:1 does seem pretty high, what ecu you using?

COLEYST200

iTrader: (3)

here is the link to were they are i did not wont to put it up but i need to no

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=p5197.c0.m619

Martin-Hadland

iTrader: (2)

I'd be asking what fuel

COLEYST200

iTrader: (3)

L8 all being well

gjh

Thats why your a respected tuner and I'm not =(

Martin-Hadland

iTrader: (2)

Wasn't mean't as a dig

COLEYST200

iTrader: (3)

I was thinking about these as the block im going to use in my FOCOS needs a rebore so i will need new pistons which cost about £450 then i will need cut out putting in as i will be running a BD14 inlet cam which cost about £100 so all in £550 as to £350

gjh

I know that. How are the cars running? (how many do you have now?)

mk2rstaff

Good luck mate, i am just going standard rebuild with mine, new rings and bearings all round, which ones are you using????

COCHYN

On a T34 you're best off using 7:8:1 with valve cut outs, you can drive mine to see the difference

COLEYST200

iTrader: (3)

Thanks for the offer of the drive of yours mate but i only need to no if they would be any good so i could save my self some £££

COCHYN

I was like that too, but ended up buying new Mahle's around the corner from Harvey's place and had him do the necessary machining. Its piece of mind also ain't it, that the rights bits are in the heart of your engine

Not that far from Birmigham, so will take a drive down when yours is near completion

andy escos

iTrader: (1)

why would you want to go lower than standard compression when Ian only wants 350 hp.
i would gve martoon a bell Ian he would tell you all what you need to know .

COLEYST200

iTrader: (3)

Thanks andy as the motor gose togever i will be speaking to martin from time to time i was just trying to save some ££ but i dont think that will be happening

markk

iTrader: (2)

unless they are a higher compression height than std then there is no way they are in the 10s

Paul_RS

iTrader: (4)

I'm no expert, but they look standard with cut outs??

For that price i'd suggest getting brand new ones any way as they are arond £50-£60 more?

markk

iTrader: (2)

I would too, but you just never know. they have been re-listed too.

COCHYN

Well in that case why bother with valve cut outs as well? Stick to standard 8:1 then.

A Focus Cossie is o.k. at 350bhp, but more usable at 380bhp onwards, especially if its going to be 4x4 that's not as lively as a RWD.