*ALL LOOK* Who would be interested in 20cc dish forged pistons - convince us there is a sizable demand!
Turbo Mini Forums

I had a chat to a representative from a reputable company who specialise in race pistons - the name is not important just yet - but they are highly regarded in the race industry...

I approached them as i believe there is a large demand for 20cc dish pistons for the A-series, that are designed from the outset to be for a 'forced induction' application, rather than the only other alternative piston currently available in a deep (15cc) dish.

So, please post below, if you would be interested.
Remember, the larger the piston dish (whilst retaining a high squish band), the better combustion chamber shape can be, and (probably) cheaper heads will be to purchase (28cc+ heads are ?450 upwards i recall) so the cost will be offset anyway...

I have no idea on pricing, but i guess to remain competitive, we should be looking at around the same price as the forged Omegas from MED (?380?) maybe cheaper, maybe a little more - we really don't know.

So - answers below please.

ps - keep the language clean - i want to be able to simply email this link to the people who make the descisions at the company.

Edited by iain on 4th Jan, 2005.

Sounds like a good product, the 20cc dish is a great idea and like you said less head work to be done. Maybe just the ports would have to be flowed leaving the well designed "beak intact.

Plenty of other a series turbo users employ a 15cc dish.

any low comp engine will feel flat off boost... thats how it is I'm afraid!

alex

AlexF

Edited by minimark on 14th May, 2004.

Everyone knows that instructions only have to be read if the thing doesn't work....

I assume they will help if you have an alloy head with small cc's and not many options for machining :)

Put me down as interested.

By the way Dave, hopefully the books you recommended should be turning up soon, but just to put a spanner in the works I've acquired a 1.4 16v k-series engine. Not giving up on the turbo but I've a definte conflict of interests

neil8p, no conflict of interests as i see it...... just turbo the k-series!

sorry for the o-t

And on the 7th day........... God created turbochargers!

im in dave

Sounds good, i might need some

Chris

Edited by 8PortChris on 13th May, 2004.

lol at mark

who said my engine is still std? hmmm?


I got a nice 7:1 CR thanks!


Alex

AlexF

Edited by minimark on 14th May, 2004.

Everyone knows that instructions only have to be read if the thing doesn't work....

seeing as i was looking at getting some of the 15cc omega's, you can definately count me in on the 20cc's

7.10:1 according to a few calculations :p

alex

AlexF

get a room you two...

Keep the post topic as is.

GTM - People go for 10cc, because that's all omega offer in the cast piston. Other makes are larger dish, but usually poor piston design - eg oil control ring slot rather than drillings.

The omega is no larger in cast, or forged form, because both are based on nat asp pistons...

Edited by turbodave16v on 13th May, 2004.

Edited by minimark on 14th May, 2004.

Everyone knows that instructions only have to be read if the thing doesn't work....

if i`m allowed some i`ll have aset or two

Edited by minimark on 14th May, 2004.

Everyone knows that instructions only have to be read if the thing doesn't work....

The 20cc dish will save having a big chamber in the head, with the bigger piston dish the engine is more efficient as the burn is better as the combustion takes place more in the piston and not the head chamber. Using a high CC dish could mean flush piston to deck heights and smaller Head chambers, you will still have to work out your required CR depending on the state of tune of your engine.

For example, if you have 27cc in the head and 15 in the piston dish, a total of 42cc combined. If i had 20cc in the piston you would only have to find 22 in the head for the same Compression Ratio...NB..before someone adds you forgot the Head gasket volume,ringland etc etc i have'nt as those factor can be different fron engine to engine depending on build and parts used.

They are a good idea.

I'll have a set for Next years 250BHP 8 port.

im defo interested, price dependent of course but if they're sensible money and it comes at the right time then yes. Less head work the better!

I am interested.

Jukka

I'll take two sets dave!

Team Racing

I'm with Iain, they certainly seem the optimal choice. I'm sure you'll let us know when you have some more info dave

Appreciate the explanations given.
Thank you all.
Arguement sounds convincing so I would be in for a set of these pistons.

My head has 30.5 cc chambers, with the 20 cc dished pistons what will my comp ratio be like?

around 7 to 1, too low unless you are going to run 25 psi!

Edited by newmember on 8th Apr, 2006.

"I'll have a set for Next years 250BHP 8 port. "

Is that all mate, i on a good day am only about 25 bhp away with out an 8 port

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Most if not all know i am only jesting, however if someone was to build one the power would be totally drivable unlike your 4000 rpm then off like f*ck till 6000ish/// set up.

As i said last year just get to Avonpark and show us all what the animal will do. Before you make excuses about LSD's, final drives ratios and heavy cars remember turbodaves car is well heavy like your,Cantello has never ran an LSD and i have Been in the top 3 before on a 2.9 with no LSD before the all out lightweight era.

MW, i am not trying to get on your goat just being straight with what i think. Your Motor is sorted but all out bhp is not everything. It is only a figure albiet a big one for a shitty A series(they are shit and i sometimes wonder why we all bother!)

Edited by giallofly on 16th May, 2004.