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stevieturbo

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Northern Ireland

5th Jan, 2007 at 05:06:46pm

Im going to get a price for some custom Ross pistons soon. It is maybe a little premature for me, but anyway...

I'll be asking a price for standard 1275 bore +0.040" ( my block is currently +0.020" ) 17cc dish ( shape unspecified ) standard pin at circa 0.810", and with a pin height 0.250" higher, to accomodate a longer 6.0" rod
I had hoped Ross might be able to do rods too, but they dont. A UK source may be able to sort some nice forged rods though, at some keener prices than the totally ridiculous £1k Ive seen some traders advertise for Mini rods.

Most pistons have a simple dish shape......My last LS1 pistons were like this. My current ones have a heart shaped dish, much like the combustion chamber.

Would there be any merit in seeing if an A-series piston could be made in a similar way ?
Or is there a technical reason why it couldnt happen ( perhaps dish Im asking for is too large in a small piston ??

Im opting for a 17cc dish request, as this would place my own setup, around very low 8.x:1 CR, as I am using a std size chamber in the head.

Are there any features anyone would want on such a piston ? Anyone any interest in a simlar set ??

These would end up a floating pin setup, with spiralocks in the piston. Ross would be supplying rings and pins.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


turbodave16v
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SouthPark, Colorado

5th Jan, 2007 at 05:24:43pm

If you want a taller pin - ie shorter crown-to-pin height(?) then shouldn't you be looking at the JE pistons?

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joeybaby83

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Isle of Man

5th Jan, 2007 at 06:40:28pm

not meaning to sound negative, but why bother with all that when you can just grind the head out?

"Turbo's make torque, and torque makes fun"

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stevieturbo

3594 Posts
Member #: 655
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Northern Ireland

5th Jan, 2007 at 08:03:00pm




On 5th of Jan, 2007 at 06:40pm joeybaby83 said:
not meaning to sound negative, but why bother with all that when you can just grind the head out?


As I mentioned in another thread..

I once had a head, where the combustion chamber had been modified, from the normal shape.
For months I couldnt get the car to rev above 5500/6000rpm in 4th gear. And sometimes in 3rd gear.

I tried replacing everything, changing timing, fuelling, carbs, pumps, dizzy's, coils, you name it.

There were actually 2 heads, from the same supplier, first replaced for other matters. Both had identical traits at higher rpms.

Eventually, I re-fitted the old cracked cylinder head, in a desperate attempt to rule out the cylinder head as a problem. The car ran perfect again after that. It was then I replaced that head, with a Swiftune item around 96/97 I think, with a cleaned up, but basically un-modified chamber.
My original head, albeit cracked was similar, done by Avonbar way back in early 1994.

After that, I swore I would never buy a head were the shape of the chamber has been altered. And I never will, regardless if it seems to be working for others.

Are the JE offerings off the shelf ?? Any weblinks ?
I want the longer rod.

And besides joey...its no hassle. I just give someone dimensions, and they give me pistons ( after exchange of some money, which is the hard part lol )
I get exaclty what I want, so Im happy.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

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