ok people over the winter months I have rebuild my motor as the compression was down the build now consists of.

ej257 2.5 cdb done by alyn
bored honed and block faces skimmed to 99.75mm bore
14mm headstud conversion (rcm)
mahle 2618 forged pistons
rcm arrow rods
acl race series main and big end bearings
rcm oil pump
rcm mls 1.1mm headgaskets
all new seal ect

the heads are the 2.0 avcs heads reworked for the 2.5 block
heads skimmed
valves cleaned and lapped in
new stem seals
new cam seals
valve clearance adjusted
new cambelt
the engine was build by Williams competition engine

rcm headers
rcm uppipe
kakimoto straight thought exhaust
6 speed box
twin plate exedy clutch
fmic
walbro intank pump
swirl pot setup with bosch 044 external pump and fuel lab fpr, with braided lines.
850cc injectors
rcm cone filter
forced performance red turbo with perrin intake pipe
simtek ecu
defi gauges oil pressure, fuel pressure,boost. oil temp.
ks2 knock sensor

running in miles done so now change of oil and get mapping done.

sure there is loads I have missed but im looking at getting close to 500 as possible. will I need a 4 bar map sensor to achive this.the car before the build was running 430bhp but what im asking is there anything missing that I should be adding so I can get close to these figure any help would be much appreciated

brakes also on the list

thanks in advance

 

Similarish build to mine. I'm running a similar spec engine, slightly larger injectors etc and a stock location GTX3076R turbo. Made 471.8 on v power. I'm running a 4 bar perrin map sensor.

 

I will be running it on vpower aswell ill invest in a 4 bar map sensor. whats that power like on you 2.5 on the road

 

also fitted a spec c manifold and parrarel fuel rails

 

I think you be better off with lateral performance mdx321v to get close to 500 BHP I seen it worked very well with 2.5

 

You never feel like you're lacking urge