Forged Pistons

[Gadgeroonie]

James and I are after some forged pistons to fit the stock rods

what options are there ?

what price and compression ratio ?

[andygtt]

Im planning the same for my spare engine build... so group buy?

I already have some potential options with pistons and rings for around 1k

[TuxMan]

Hi Gadge Dave At Jetstream does a set of forge pistons to fit STD rods about £900 ish + vat . Tux

[Gadgeroonie]

thanks tux

£900 is a bit steep for something you can have custom made for a lot less than 100 per piston

do you know the compression ratio ?

a group but might be a good idea !

[Hollowpockets]

How much power have the M400 forged pistons been known to take or should take?

Cheers

[Gadgeroonie]

they should take as much power as any other forged piston IMHO

however i do not know how tight the tolerances are (i hear that the engine slaps when cold)
does it have a central gudgeon pin or is there an offset ?

a piston expands when hot so the dimensions and ring gaps need to be set for the target hp / temperature

[Hollowpockets]

I was asking as I'm doing the gt28rs route and wanted to make sure I'm safe piston wise for the 600 club, my pistons were re-dressed and rings fitted by mountune when the 550 was the target. I will contact them and check if it's going to be a problem.

[Gadgeroonie]

was it an m400 to start with ?

[Hollowpockets]

Gadgeroonie said:

was it an m400 to start with ?

Yeah, main bearings and big ends have been replaced/upgraded the crank, rods and pistons remain M400 parts though.

[chuntington101]

I cant offer any help, but the below information may be usefull if you are having custome pistons made.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Thanks,

Chris.

[Gadgeroonie]

Hollowpockets said:

Gadgeroonie said:

was it an m400 to start with ?

Yeah, main bearings and big ends have been replaced/upgraded the crank, rods and pistons remain M400 parts though.

the crank mains and big ends run in oil - was there oil starvation that caused you to replace them ?

[andygtt]

Gadgeroonie said:

Hollowpockets said:

Gadgeroonie said:

was it an m400 to start with ?

Yeah, main bearings and big ends have been replaced/upgraded the crank, rods and pistons remain M400 parts though.

the crank mains and big ends run in oil - was there oil starvation that caused you to replace them ?

because the standard ones fail... which is what happened on my original engine lol

[Hollowpockets]

Gadgeroonie said:

the crank mains and big ends run in oil - was there oil starvation that caused you to replace them ?

Love how people assume the worst all the time... But nope there was no problems with them, the engine had done 18k. I only replaced/upgraded as recommended by Trevor before going for the 550 set up.

[mgbond]

Gadgeroonie said:

thanks tux

£900 is a bit steep for something you can have custom made for a lot less than 100 per piston

do you know the compression ratio ?

a group but might be a good idea !

My only option for the 2.5 was buy 4 sets for around the £900 a set. So had them custom made by arias at £1200 with a few extra's like ceramic coating.

Don't think you will find anything much cheaper than £900.

Other option is cossie Pistons as Steve has in his 2.5. Must be able to get some for a 3.0. Bore might need to be re sized a bit, however this route requires different rods also so end up paying more than the £900.


Bondy

[anotherdom]

Apologies for going OT, but I can't help on the forged pistons front!

Hollowpockets said:

I was asking as I'm doing the gt28rs route and wanted to make sure I'm safe piston wise for the 600 club, my pistons were re-dressed and rings fitted by mountune when the 550 was the target. I will contact them and check if it's going to be a problem.

If you're now confirmed as going with GT28RS turbos, could I ask what you'll be wanting for your modded T28s? I may well be interested. Email through my profile if you'd prefer.

Thanks,

Dom.

[Hollowpockets]

Hey Dom, I'm not sure what they are worth so ill have a think and let you know. Cheers

[anotherdom]

Great, thank you.

[Gadgeroonie]

andygtt said:

Gadgeroonie said:

Hollowpockets said:

Gadgeroonie said:

was it an m400 to start with ?

Yeah, main bearings and big ends have been replaced/upgraded the crank, rods and pistons remain M400 parts though.

the crank mains and big ends run in oil - was there oil starvation that caused you to replace them ?

because the standard ones fail... which is what happened on my original engine lol

did they fail after a track day / lots of cornering ?

[andygtt]

no it had never been on track at that point... I upped the power and they failed almost imediatelly.

[Gadgeroonie]

where is a good place to get mains and big ends from ?

any one got any idea's of the compression ratio