CP Forged Pistons

Post Tue Nov 19, 2013 7:54 pm

Hi there,

I am in the process (slowly) of getting my M62B44 rebuilt after piston failure. The block is getting sleeved and I will be using CP forged pistons as used by VAC Motorsports in the US. It seems that only VAC can supply them - does anyone know if this is true, or is there a UK company who can supply them to me?

I'm keeping the same 92mm bore and am going for the 9.8:1 pistons to slightly reduce my cr as it will be supercharged.

This is the site link;

http://store.vacmotorsports.com/cp-forg ... p1100.aspx

Cheers!

Post Wed Nov 20, 2013 9:05 am

I dont know anyone in the Uk unfortunately

How much is that build costing?

Post Wed Nov 20, 2013 9:05 pm

Hi Phil,

Thanks for your reply - I think I'll have to get them from VAC and hope that they can send it to me as a gift to avoid the potential import duties....

The set of CP pistons is about a grand plus shipping. To have the cylinders bored and honed and spun cast liners fitted is about £1300.

All I want is a reliable strong engine! Don't we all?!

Cheers

Post Wed Nov 20, 2013 9:16 pm

CP is standard on KTM bikes so you might find a dirt bike engine builder with the right contacts.
But CP are made in the US have you thought about Woosner piston'?

Post Wed Nov 20, 2013 9:23 pm

I hadn't considered Wossner pistons, mainly due to not knowing about them (!). I had thought about using Mahle, as they are the OE, but when I did my research into rebuilding the engine it always led me to VAC's website. They have done a lot with the M62 engines, so I figured it would be best to use CP, seeing as they do.

I might contact Wossner and see what they say. Cheers for the info.

Post Thu Nov 21, 2013 1:00 pm

SuperchargedV8Touring wrote:Hi Phil,

Thanks for your reply - I think I'll have to get them from VAC and hope that they can send it to me as a gift to avoid the potential import duties....

The set of CP pistons is about a grand plus shipping. To have the cylinders bored and honed and spun cast liners fitted is about £1300.

All I want is a reliable strong engine! Don't we all?!

Cheers

Not far of ls** money then!

Be interesting to see it when its finished

Post Thu Nov 21, 2013 10:43 pm

Indeed Phil! I want to drive it, never mind seeing it!

Post Wed Dec 11, 2013 6:27 pm

SuperchargedV8Touring wrote:Hi there,

I am in the process (slowly) of getting my M62B44 rebuilt after piston failure. The block is getting sleeved and I will be using CP forged pistons as used by VAC Motorsports in the US. It seems that only VAC can supply them - does anyone know if this is true, or is there a UK company who can supply them to me?

I'm keeping the same 92mm bore and am going for the 9.8:1 pistons to slightly reduce my cr as it will be supercharged.

This is the site link;

http://store.vacmotorsports.com/cp-forg ... p1100.aspx

Cheers!

We get ours from http://www.performanceunlimited.co.uk/

Post Wed Dec 11, 2013 10:14 pm

Cheers Yamoda, as it stands I'll be getting them direct from VAC.

What pistons have you used in your motor then? Is yours supercharged?

Post Thu Dec 12, 2013 8:25 am

We did a couple of chevy motors and got the pistons from them, not used them in a BMW engine yet. I'd get a quote from over here first as VAC's prices seem a bit high.

Post Thu Dec 12, 2013 10:12 am

They wont send anything as a gift either, and their international courier charge is a rip off too

Post Thu Dec 12, 2013 8:44 pm

Thanks very much Yamoda and DanThe - great advice!

Post Sun Dec 29, 2013 1:16 pm

DanThe wrote:They wont send anything as a gift either, and their international courier charge is a rip off too

Yep
I second that, I brought a ton of bits from them when I built my m30 engine.

On a side note Michael, do you know what head gasket your going to use?
I'm still struggling to find one for my twin turbo setup?

Post Sun Dec 29, 2013 5:06 pm

Hi Ben, I haven't chosen a head gasket set yet. I might get one made up by Mike Tanski (http://www.ferriday.co.uk/), because apart from being a really nice guy he knows his stuff....

How is the twin turbo project going anyway?

Post Mon Dec 30, 2013 1:10 am

Ohh right well if he makes a set could you put my name down for a set too? Well as long as they aren't ££££ ;)
The twin turbo conversion is going super bloody slow at the minute. I'm currently moving and saving for a house so it's been put on the back burner for abit but I'll be still spending time on there.
How's the rebuild going?

Post Mon Dec 30, 2013 10:44 pm

Mike has advised me to stick with the OE gaskets for my application, but perhaps your beefier engine will make use of them? Send him an email and see what he says - he's totally straight down the line, so you can't go wrong.

Sounds like your life is pretty busy at the minute, much like me - busy at work and a new arrival due at home in March....... The rebuild will be done pretty quickly once I've got the pistons sorted. Everything else is ready and waiting and I know the ecu map will work on the rebuilt engine, so there's little to worry about there.

I bet yours will be ready before mine though!

Post Wed Jan 01, 2014 2:15 pm

Well I wonder if I could use the OE gaskets as well then because I don't want to run a lot of boost between both the turbos, plus I'll be using M52 ARP head bolts to keep the bugger in place.

I'm hoping to use the E30 as a wedding car for my wedding as well next year so need to get my arse moving haha.
Congrats on the soon to be new arrival as well matey

Post Wed Jan 01, 2014 3:36 pm

Cheers Ben!

Mike Tanski says unless we're using uprated internals we would be better off using std gaskets. He sells a lot of his bi-metal ones to highly tuned Cosworth lumps etc, so my .5bar 'charger is well under that level!

Congrats on your engagement and yes, you've got your work cut out! May the force be with you!

Post Wed Jan 01, 2014 3:50 pm

haha thank you very much matey ill defiantly need the force too
have you got the dudes email add or web add? ill drop him a mail. it would be great if i don't need a aftermarket gasket set.
what head bolts are you going for?

Post Thu Jan 02, 2014 9:26 pm

Mike's web address is: http://www.ferriday.co.uk

I'm using standard head bolts afik, my engine builder hasn't said otherwise.....

Basically, as soon as he gets the pistons the engine can be rebuilt and I can get it fitted in the bay and running on the Emerald. It's easy if you say it quickly.

Post Thu Jan 02, 2014 9:27 pm

afik! AFAIK more like!