If your thinking of keeping the RB320, and buying another fun car, then I would not buy one to do the project yourself as it will cost dearly to do it from scratch. There is plenty good cars out there that will make you smile from ear to ear at £10k all in.

Yeah thanks for that , seen a couple now up for 8/9k and had 5/6 spent on them 😮 and running 350/400bhp 'safely'

Hi friends, i have a 2.5 p1 with gt3076 turbo and link g4+ ecu for fast road car and i love the ej257. Maybe in 450hp the car drive very well and its very fun with dccd and jdm 6 speed gearbox.
Time ago i was running in a forged 2.0 and i prefer 2.5
Please sorry for my bad english

Hi there newbie to this site. Owning a p1 myself for over 4 yrs now had 3 engine rebuilds over the years (apparent subaru specialist) and now waiting on my 4th 🙈 spent around £10000/£12000 with a previous company well it's actually only 1 bloke by himself but anyway I'm back to square 1 now so not a good way to spend that type of money and basically start again.
I have now taken her to Api for a 2.5 build around 460/480bhp with more torque previous had 2.0 around 350bhp which will be your limit with a 5speed gearbox and clearly over the limit my supposed forged engine could handle.
Are you going 6speed setup too?

Had a standard 5 speed running 420 for 3 years no problems yet,but a 6 speed is on my very long list

To be honest there's people selling forged 2.5's in saloons for 2/3k , got offered a full car the last week for 3k, the price of the engine alone comes to 3,000 with all the upgrades, obviously with provided reciepts, then I'd have the shell , 5spd box, standard p1 engine to strip n scrape money back , but yeah I would go 6 speed just because I'm driving the rb now and couldn't imagine driving this engine with 5spd, the ratios must be shorter or something

A lot of my friends have had p1's done upto 330:350 bhp and they've all gone bang, are all 6spds DCCD

no there not all dccd