Hi All,
Wheres the best / cheapest place to get low comp or pocketed pistons?

Thanks

 

Cheapest doesnt = best IMO

Buy the most expensive you can afford.

 

Most expensive doesnt always mean best either

What makes are people running and what style piston for around 400BHP


Just after a good deal and what people recommend

 

america

 

Cossie racing ones will be cool for 400 bhp and they come next day.

 

Any links?

 

Sure they have a web shop mate.

Alot of the big traders might hold them in stock too?

 

Std piston material is fine for 400bhp, dont piss about changing them.

 

Wiseco are good value for money.

 

they`ll take a good bit more than that euan

 

Should take as much as you can throw at them

 

Now THAT'S my kind of talking!

Is low comp needed for 400bhp Stu?

 

Cant you just machine your standard pistons??

 

No Dan

 

Depends quite a lot on the turbo you plan to use to achieve the power as the turbo will largely dictate the powerband that the power will be achieved at, and thus it makes a massive difference to the cylinder pressures created.

 

Yes. Thats what at least 90% of the classic 500+ spec engines contain.
Standard Mahle pistons with pockets for cams.

 

What turbo would you recommend for 400bhp on a standard engine with uprated headgasket?

Slap me when we meet if thats a stupid question!

 

I have a RR grauph here from PJ Motorsport (dont know what the rolllers were like for accuracy) but

Standard Compression and Head fully rebuilt with Cometic Gaskets ruuning
T34.63
Greys
Live mapped at NMS
Grp A Coil
Rad Tec Cooler and all the other stuff

402 bhp

 

What internals? Standard?

How wide is the power though? Is it laggy on a .63 housing?

 

Im not going mega, will be something like

Lightened and balanced bottom end, new shells etc
Uprated oil pump
( Poss pistons, if i decide what ??? )
fully overhauled std head possibly with the new Kent cams to Ahmed Spec
T34 / .63 ( cut back blades etc )
500 cooler
breather system
currently on Greens, but may run Black or greys to achieve a 370 - 400?

Any advice greatly welcome

 

Standard internals, bit laggy with the .63, 4.3K-7K is the good power

 

Shite for road then?

Nice spec Karl!

 

What makes you think a t34/63 will be laggy?

laggy compared to what? a T3?

I think it would be good turbo for a road car, full boost by 3500 or earlier?

 

not mega bad, not as bad as a 420 i went in with a 7.2:1 ratio, it was flat, flat, falt then went mental but that spec that he had wasnt bad

 

.63 is laggy compared to a T34.48 and compared to the gunship of Steves very laggy

 

Cheers mate, the engine is all stripped and i want to get everything sorted before the build back up Dont plan to be re doing it anytime soon! LOL

Hopefully going to aim for national day to be my maiden voyage

 

Mine was looking to be Combe for a properly sorted run, think i'll now join you at ND!

Euan, anything is laggy compared to a T3!

 

Go Blacks and while your getting the chip written go for closed loop and coilpack on a L8,

Thats my only advise

 

Does it matter if you use 2 or 4wd pistons(mahle) to machine down?

What sort of ring gaps and piston to bore clearance on em?

I heard cosworth pistons needed lots of piston to bore clearance,high

expansion material used?

puddy

 

DO i need any uprated low comp pistons??, as today ive had people saying they wouldnt change from std unless i plan 405 - 500 BHP??

God know, each tuner says different

 

ask who ever is going to set the car ups opinion as they will know what works best for the system they use

 

Speak to Stu mate, I can't recommend him enough, has been wicked with me and my car over the phone!

Will get up and see him soon for a proper set up! Can't wait!

 

i have a set for sale