Flat Tops Or Dished Pistons In A Rb26/30

[R.I.P.S NZ]

I'd like to hear from people with experience in using flat tops or even dished pistons in a RB30 with a 26 head.

Flat tops usually give a C/R of 8.2-8.3, dished can get you down to the low 7's

I want to hear from guys who have made big power (as in 600,800, 1000hp+) when using flat tops or dished pistons, only in a RB30 and only when using a 26 head.

If you can answer the following:

1) what shape did you use, flat tops(8.2-8.3:1), very slight dish(high 7's to 8.2:1) or larger dish (lower than high 7's:1)

2) what fuel did you use

3) what cams (if you want to say) and head work, none, mild, extensive.

4) what turbo

5) how much power did you make, at what boost, with what torque, rpm etc

6) without NOS, hp?

6) with NOS hp?

This may seem a strange request from me but I have a situation that needs independent outside input.

PLEASE, only post if you can back it up with dyno printouts, video proof etc, not my mate said this and that please.

Feel free to add dyno printouts here, e-mail me dyno printouts or PM me if you'd rather others didn't see your data.

Thanks Rob

Edited August 11, 2007 by R.I.P.S NZ

[exXU1]

I'd like to hear from people with experience in using flat tops or even dished pistons in a RB30 with a 26 head.

Flat tops usually give a C/R of 8.2-8.3, dished can get you down to the low 7's

I want to hear from guys who have made big power (as in 600,800, 1000hp+) when using flat tops or dished pistons, only in a RB30 and only when using a 26 head.

If you can answer the following:

1) what shape did you use, flat tops(8.2-8.3:1), very slight dish(high 7's to 8.2:1) or larger dish (lower than high 7's:1)

2) what fuel did you use

3) what cams (if you want to say) and head work, none, mild, extensive.

4) what turbo

5) how much power did you make, at what boost, with what torque, rpm etc

6) without NOS, hp?

6) with NOS hp?

This may seem a strange request from me but I have a situation that needs independent outside input.

PLEASE, only post if you can back it up with dyno printouts, video proof etc, not my mate said this and that please.

Feel free to add dyno printouts here, e-mail me dyno printouts or PM me if you'd rather others didn't see your data.

Thanks Rob

Why do you ask this Rob , as i have made 580 atw 0n 19lb with 98 Ultimate, Ross flat tops- i have dyno sheets. I am interested why you ask this as?

[R.I.P.S NZ]

Why do you ask this Rob , as i have made 580 atw 0n 19lb with 98 Ultimate, Ross flat tops- i have dyno sheets. I am interested why you ask this as?

Thanks for your reply, its a long story but I need input from as many people as possible who have made good power with flat tops or even dished pistons in a 26/30, PLEASE put up your dyno printout and I'll explain everything once I have a few more replies on here.

Nothing shady going on I assure you

Thanks Rob