forgies

[Guest]

Hey guys,question...best brand forged pistons and has anyone heard of or know anything about Cosworth forged pistons?? And yes,I know Cosweorth did engines for Ford in the WRC,they also make EJ20 and 25 forgies. Cheers y'all

[Koom]

What are you wanting to know about them?

And what really constitutes the "best"?? Big question that one.......

[Guest]

Lol.fair enough Koom Ok,rephrased, what is going to allow me to run upto 18pounds,and a target goal of 400-500hp??

[Koom]

Ok now you have to choose between just 18psi and 400-500hp, cause you ain't gonna get that much power without running more boost than that. Most decent forged pistons/rods will handle 18psi without flinching i.e. Wiseco's, JE's, CP's, Arias, Cosworth etc etc etc.

If you want to know if the Cosworth ones are good, then look around on Nasioc at the results there. Haven't heard anything bad about them and I'd expect them to be pretty good based on name alone. Its not like a company like Cosworth would release a less than decent product as it would harm their name more than it would increase their profits.

Once you've chosen pistons, you've got rods to choose, then bearings, then who's going to put it all together, then everything else

[BC5RA]

Its not pistons alone that will allow 500 crank horsepower.

You could in fact have the strongest engine in the world and all it would take is a crap tuner or a bit of unnoticed detonation to lunch it.

[funkytown]

or a turbo not up to the job, running to much boost.

totally agree with BC, ensuring your shortblock is bullet proof will only shift the weak point to somewhere else which there are many..

500hp either atw or crank puts a large strain on everything

[Guest]

awesome guys,thanks!!! 500 is the magic number. Cosworth do most everything for the '25 but like I say this is new to me...I know the components I need but don't know the brands reputation...wouldn't mind ARP head bolts but don't know how piston companies stack up against each other,good head gasket company,rods etc. Who would you guys recommend?? Cheers all

[Guest]

will settle happily for 400 atw while I think about it lol

[Swindog]

Any of the big names are as good as each other in the tuning world mate.

You could ask 100 people and get 100 different answers. You just have to weight it up and go with what you think is the best combination.

I currently have wiseco forged pistons with eagle h rods. unsure of the bearings though.

I know it was built by a good builder and have confidence in the build and strength of the motor.

I would look on 41.co.nz and see what they can supply for engine parts too. Mac stocks all the good bits.

[Guest]

Sweet,thanks man

[Koom]

What ECU, Turbo and who's going to tune it?

For a shortblock, you've gotta look at the ones that Possum Bourne Motorsport sell on Trademe. That price is hard to beat.

[Swindog]

Yeah thats true. Possum Bourne do some awesome shorties.

[Guest]

Lol,this means I'll have to save...I was going to buy one thing at a time lol

[log1call]

You really want to consult with the manfacturers or get their data sheet for the pistons.

There are a lot of parameters involved in choosing pistons. How much they weigh, what pressure they can stand, what revs they can stand, what revs, temp and pressure the rings can stand... the list goes on.

[Swindog]

 250T said:

Lol,this means I'll have to save...I was going to buy one thing at a time lol

Least if you buy one of their motors you knows it quality parts and built by the pros. And you dont have to worry that all your parts youve saved for are going into it, cos its already together

[4ORGD]

iv seen cosworth pistons in a closed deck block make 800hp.search dynoflash on you tube and then click the dynoflash username from one of the videos.he uses alot of cosworth and perrin stuff on his subis and he explains why he uses those brands.this dude is the ultimate subaru and evo tuner.he has a 9sec street legal version 8.he has alot of cool videos of him tuning subis in his workshop and then taking them out for a spin.

[Guest]

saweet!!! that's awesome!! thanks man