W O T

I bought these pistons from a member off of HT for basically for basically dirt cheap in a package deal, there used SRP's. They originally came form the member Spun Vtec but he doesnt seem to remember the compression of them

They are for a D16
They are SPR forged based on the thick ringlands
They have a #10 and SRP logo stamped inside of them

Heres the measurements I took with a digital vernier



Pics a little blurry but the 4 measurements are all there

Heres an overhead pic if it helps



Now any other measurements you guys need I will gladly take as Im doing absolutely nothing this weekend, girlfriend is sick and Im just keeping company while she sleeps I guess. Ive got the used rings they were used with

Im hoping someone can help me identify what pistons they are exactly from SRP's lineup and what compression they will yield in what motors. Im going to be using them in a D16A6 with a .040 milled head, just need a compression number to see if I should sell them or not.

Thanks

Spenser

whats the deck height and CC of the piston

W O T

Am I able to figure those out?

Is deck height the 2" measurement Ive got on the right?

Spenser

is the piston dished or domed? if its dished or flat top, use it.

W O T

well there basically flat, if you look at the overhead pic you can see a ring going the circumference of the piston about 1cm inwards, well the height of the piston drops about 1mm on the inside of that ring

At first Spun said they were 9.5:1

Now I emailed him under another name and he says 10.5:1....

Which with my .040 milled head just isnt going to work

I need to get an accurate compression ratio

I was hoping the ringland hieghts and #10 stamping would be able to determine the exact piston from SRP's site

StanB

I have a set of SRP pistons with the number 10 stamped on the inside between the holes for the wrist pins. The top is flat like your pictures above. The serial number for the ones I have is SRP-149199. They are 75.00mm and the dish is 11cc. I was told the compression ratio is 9.00:1. These are for a stock bore D16Z6. I hope this helps.

W O T

ya man any info at all helps

Is your serial number on your pistons somewhere, maybe its hidden somewhere I cant see it...? or on a spec sheet, something I wish I had so I can either assemble these to my eagles or buy another set and not get an LSD

Thanks, gonna go enjoy some canadian parking lots sideways

Hopefully SRP will throw me an email

StanB

I checked one of the piston, and there is no serial number on it.

W O T

ya none on mine either, I dont want to use them if my compression is gonna be like 11:1 and I try and run 18psi on 93 octane

KABOOM!