Cosworth Supercharger Owners Thread

[weederr33]

Originally Posted by Matt@Cosworth

Ok just trying the shorter belt may well be enough on its own as the increased tension will pull the idler pulley away from the crank pulley

As soon as I get a chance to put the other belt on, I'll let you know how it goes!

Also... about building the engine. So if I were to keep the stock compression, and stock pistons, would it be wise to buy new pistons and piston rings? Or keep the ones I already have?

[ajc209]

Originally Posted by weederr33

As soon as I get a chance to put the other belt on, I'll let you know how it goes!

Also... about building the engine. So if I were to keep the stock compression, and stock pistons, would it be wise to buy new pistons and piston rings? Or keep the ones I already have?

If you are building the engine, why not put in new pistons and lower the comp a tad so you can run beast mode 380hp?

I have a feeling stage 3 might be release at SEMA if we are lucky.

[weederr33]

Originally Posted by ajc209

If you are building the engine, why not put in new pistons and lower the comp a tad so you can run beast mode 380hp?

I have a feeling stage 3 might be release at SEMA if we are lucky.

I only really want to sit around a reliable 300-340 hp at the crank. haha

[Matt@Cosworth]

our stress analysis showed that the stock piston starts to suffer at cylinder pressures over 120Bar and this will very roughly equate to 340Bhp

if you want to rebuild it, then it'll depend on how many miles you have your current setup and as a stock piston is only about $60 each including rings and pin then it may just be best to bung a new set in there

[Icecreamtruk]

Originally Posted by Matt@Cosworth

our stress analysis showed that the stock piston starts to suffer at cylinder pressures over 120Bar and this will very roughly equate to 340Bhp

if you want to rebuild it, then it'll depend on how many miles you have your current setup and as a stock piston is only about $60 each including rings and pin then it may just be best to bung a new set in there

Quick question, is this analysis proper to the Cosworth SC or would you say the pistons would suffer at that pressure regardless of chosen setup (of course, the bhp number would vary depending on turbo vs SC and even among types of SC).

[weederr33]

Originally Posted by Matt@Cosworth

our stress analysis showed that the stock piston starts to suffer at cylinder pressures over 120Bar and this will very roughly equate to 340Bhp

if you want to rebuild it, then it'll depend on how many miles you have your current setup and as a stock piston is only about $60 each including rings and pin then it may just be best to bung a new set in there

My car has about 53k miles, so if I were to still want to build it near the end of next year, I'd say about 65k miles. However, for 340 bhp would it be ideal to look for a forged piston at the 12.5:1 ratio or lower it?

[weederr33]

I just read on the UK forum something about an 11:1 ratio piston. Does anyone even make that? Or does it have to be custom made?

[Matt@Cosworth]

Originally Posted by Icecreamtruk

Quick question, is this analysis proper to the Cosworth SC or would you say the pistons would suffer at that pressure regardless of chosen setup (of course, the bhp number would vary depending on turbo vs SC and even among types of SC).

the analysis was just based on cylinder pressure which is directly related to power but there's a number of ways to achieve that power
so yes turbo or SC 330-340bhp is the absolute limit of the stock piston

[GsxrMe]

More like stock rods, they love to bend and snap. If not for the rods we could run e85 on stock comp and still hit the limits of our transmissions. 450bhp is not a problem with e85, 12.5:1 pistons and a big enough turbo.

[ajc209]

Originally Posted by GsxrMe

More like stock rods, they love to bend and snap. If not for the rods we could run e85 on stock comp and still hit the limits of our transmissions. 450bhp is not a problem with e85, 12.5:1 pistons and a big enough turbo.

Matt has already discussed their findings that much more the 250whp and you are on borrowed time with the stock rods.

[pjp]

I have been trying to buy the 1.0 - 1.3 kit
All have been put on hold from Cosworth is the story I am getting.
Does any body know the story?
Nameless said they nolonger make parts for cosworth?
Thanks

[weederr33]

Originally Posted by pjp

I have been trying to buy the 1.0 - 1.3 kit
All have been put on hold from Cosworth is the story I am getting.
Does any body know the story?
Nameless said they nolonger make parts for cosworth?
Thanks

So you're saying Nameless has admitted to no longer making parts for Cosworth? The exhaust pieces are still on their site. As are the headers on the SpeedFactory site. Although, unless there is something different about the headers or downpipe, I don't see why they would be any different than the normal Nameless parts. So long as they are 2.5" ID it should work.

Also you an find the Stage 1.0 on the Fensport and Vivid Racing sites

[pjp]

I have tryed all co. Listed in USA for cosworth parts
With no luck!
Have not tryed yet out of country yet !

[pjp]

Yes rep for nameless said they are done with
Cosworth but are selling there own pipes
But not as cool
Or is Cosworth done with nameless because of
Cracking pipes??