jrponline

Hey guys,

I'm wondering, in your experience, how far have you pushed the factory cast pistons without failure in terms of HP on the B16A? Lots of people talk about max boost on the stock block, but thats somewhat irrelevant.

Here's my current setup, producing 236whp, 187tq @ 9psi:

B16A, stock block, pistons, rods, crank, ignition.
Intake Cam -2, Exhaust Cam +2 (to reduce overlap)
Precision SC44 Turbo, .48 A/R
Turbosmart 45mm Ultragate
Precision 440cc injectors @ 44psi
Walbro 255lph in-tank fuel pump
2.75" downpipe, hollow cat, greddy exhaust
P30 ecu, professional techtom programming, conservative timing, 11.5:1 a/f
Turbosmart e-boost controller

From what I've heard so far, reliable sources claim I'm already pushing the factory cast pistons too far at 9psi. I'd like to hear experienced tuners thoughts on this please, not posts saying I should be making more power as is. There are many others out there with a similar setup making outrageous claims of 300+ whp. I would like to skip those replies please. THANKS!

TurboJesse

I made 310whp with my injectors about maxed out...shooting for 375ish this time around

m R g S r

You using stock pistons?

jrponline

I'd like to know that too, as I am really only looking for replies from people with the cast B16A pistons please.

Thanks.

m R g S r

Well they can take a lot of power, it's just a matter of time before the ringlands go...

TurboJesse

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jrponline &raquo;</TD></TR><TR><TD CLASS="quote">I'd like to know that too, as I am really only looking for replies from people with the cast B16A pistons please.

Thanks.</TD></TR></TABLE>

i know how to read, i answered your question

thanks

jrponline

Thanks. Thats pretty amazing output btw, congrats.

Any others with input?

TurboJesse

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">Well they can take a lot of power, it's just a matter of time before the ringlands go...</TD></TR></TABLE>]

conservative timing is key. it will hold longer than most think....300 really isn't pushing it. Plenty have made 400+

jrponline

Any others out there on the cast B16A pistons that can give me some input?

MachAF

the 'psi' number doesn't really mean much to the motor.

the amount of power the motor is making is what determines the motor life. more power = more heat.

230whp is fine.

forged piston just give you more room for error in tuning and will handle detonation better than cast. But detontion can still kill forged material.

Above 275whp in a b16, then I'd look into forged materials.