Forgot about the pistons!!! but if any consolation the Honda d16
guys are pushing 75mm and 76mm stock cast suzuki vitara pistons
in 400+hp and 20+ lbs setups for over 5 years without failure.
Try and get the most you can with 14psi ur getting power hungry :)))

Yeah, Its getting cracking now! Im not too worried about the head gasket or rod bolts. I am however VERY worried about the pistons. Its making 3.5 times stock power, the heat loads on the pistons would be horid!

I might back off the boost before i turn it any harder, I still want it to be reliable.

Stock h89 ports what a trip!!
Off the scales A series Simon congrats!!!
Hope the headgasket holds and the conrod bolts.
At least if you blow her up shes been a cheap experiment
and with that cam its compared to a seriously worked NA L28.
Id seriously invest in a cometic headgasket, arp rod bolts
and head bolts now!!! at 7000rpm will be close to the twin cam
hybrid A series you where planning to use.

233HP atw at 5500, will finish tuning the top end tonight.

Same engine but with a new cam.

The wastegate was set at 14psi and was making about 150FtLb of torque at 5500.

The new cam should shift the same torque up to 7250rpm

Was: 150ftlb at 5500

So.. (150x5500)/5252 = 157hp

New: 150ftLb at 7250

(150x7250)/5252 = 207hp

I`ll be adding about 2psi aswell taking it to 16psi

Should be about 165ftlb

(165x7250)/5252 = 227hp

Thats probably close.

Simon,
what do you think the figure will be with the new cam?

I have to make a decision.... What has happened is, i didnt finish tuning this engine. I have had the car out a couple of times (Winton and Mallala) and the boost doesnt really come on until 4800rpm but the power starts to fall at 6000rpm because of the standard cam.

Yesterday i pulled the cam out to change it for a 300deg cam.

Im going to have to give the money out based on the only dyno figure i have with the standard cam cos thats what i said the engine would have in it.

The figure was 152HP atw.

So the equal winners are......




























































PIGDOG and DatGX

CONGRATS!

I`ll send PM`s

its my money- 145 ftw and then bang

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i said 150, not 105...which means that i win the first round along with Datgx

I still havnt had it back to the dyno. Im under a lot of pressure here at the mo.

Soon guys, sorry.