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No they are bigger.

Probably similar, the reason they used these is because ARP's were custom order for that size

They are 12.9 personally I think it needs a girdle too but they seem to think it will be fine.

Suck it and see! I think we'll be ok but who knows!

Dry sump mock up build

we tried the bigger throttle body and saw pretty much ZERO difference!

Josh Cook bought them so he might have some pics.

Yes we did the build on the white 250, what i mean is we don't know how strong the internals are, they physically look better but not sure what the power limit will be. The graph above was a totally standard car yesterday morning, all we did is bolt a turbo, down pipe, exhaust and injectors on...

The pistons and rods are stronger but how strong is unknown really. You see some big claims on the stock injectors saying they are 360hp but they max out on my dyno at about 325-330hp!

Getting there Gray yes. It's just on 83mm pistons, need the wall thickness to try stop the block cracking! Fuel wise I have a set of 2400cc Siemens but might need to add some other injectors too if I go down the e85 route

The valves are 2.7mm bigger than the stock 250 on the intake and 1.5mm on the exhaust :)

It's supposed to be 9.5 taking into account the head etc. They are 295 degree and 13mm lift IIRC

"Improve throttle response & Housepower by 7-15 BHP" LOL

Yeah that's it. It might have evened it up with the third gear pull but anything over 10 degree difference makes the figures high

I'm afraid the 22 degree difference in AT and IT will inflate the figure, should be run in 4th too, torque curve would look better with a longer pull

Waiting for the block to come back and need to go collect the diff so I can have a sleeve made.

Crank is here at last!

There's no pre-set map for them. I would have to send you a base map for you to log and we would revise the cal to suit. Will take several versions to get perfect.

I can but it works out fairly expensive for a map this way: http://www.rstuning.co.uk/remote-ecu-remapping-c-131/fastchip-rs-tuner-rs-tuning-slave-p-196.html

As i said above, its nothing to do with fuel or accel fuel. I can leave all the fuel related tables stock and still get rid of the flat spot

I have a good used one i think

There's more than one issue on them i think, the other could indeed be related to the map sensor but one is 100% caused by changing the exhaust, it looks like they are going very lean on a wideband but it's not a fuelling issue!

It can be completely mapped out, took a long time to find and fix but it is possible

200hp per cylinder won't be an issue, maybe more.

Not sure how far to go but 4 figures would be nice! Which rods? The stock ones or the Carillo?

Looks to be the case so I want to build this with different bits, I like been different :)

Ordered some CP Pistons and Carillo rods, time to pick some turbos to match!