Hi

i was just wondering who is running around 450BHP on a EJ257 engine and for how long lol. Without having the blocked pinned, runing forged internals.

I was weighing up my options and just wondered if spending another £1500ish to have the blocked pinned is worthwhile.

 

Running 477 BHP & 475 ft/lbs for the last month (1000 miles). Block isn't pinned, but engine fully forged - 11mm ARP head studs, Carrillo rods, Wossner pistons, ACL race Bearings, etc. Runs awesome - dual maps high boost 1.6 bar. If you plan taking it over 500 it's worth getting the block pinned.

 

I know someone who is running just under 500 on an unpinned ej257. Forged pistons and 11mm studs are a minimum requirement if you're planning to run 360 + imo. I had 2 std pistons crack at 359 bhp but others have run 400 with no issue.

 

I think 450 is about my limit then, is 500 BHP on the road much different to 450.Guess you wont use 450 never mind 500.

 

i prob wouldnt take an unpinned engine much above 450, i have heard of them doing 500 fine, ive pinned mine for safety when i eventualy get around to it

 

I had mine pinned as part of the Finch rebuild. Just wanted to build some more strength into the block and give more hg sealing area. I'm only running at a guess 360 to 380 and thats fine for a road car for me.

 

mine was 370 prior to rebuild, but as said 2.5 have a few issues, solved once fully done, even then i wouldnt go above 550, but if built right its possible

 

You thinking of more power already jim? 450 on the 2.5 would make an awesome road car. Shouldn't worry about the block, should be ok at that but wouldn't recommend going any more than that. What gearbox you going to be running?

 

More power was always on the cards, first map was just to get a bit more mileage on the engine. Ive already had the UK 6 speed fitted, my logic being 1-4 are the same as the JDM and 5 & 6 are great for m`ways and blowing evo`s off the road. My old 5 speed with my set up made it a quick car upto 120-130 ish but it ran out of steam at 145 ish so the evo`s ect blew me.

At the moment ive got it all in bits, ive got a GT35 turbo and RCM headers with a Harvey trick pipe to fit this weekend. Then im going to try and make room for the 100mm K&N traffic cone ive got, thats going to be a mission. I`m aiming to get it done for the end of this month and get simon to come fit a Simtek and remap it.

The only thing is i bought the GT35 on impluse and it is a 500-600bhp turbo, i dont know if its going to be happy around the 450ish mark. Might try it see what happens and if its no good sell it and buy a MD321T.

 

is it a standard fit gt35? and if so would it fit my motor? im just pricing up the 2.1 which would be good for 600bhp, then i'll be looking for a new turbo. Mines currently running the md321t

 

Im running 440/440 on a 257. Standard crank and rods, but CP forged pistons. Cosworth UHT studs and HG's.

I wouldnt even bother sticking the gt35 on if i were you! Firstly, if your asking the mapper to limit it to 450, you'll be limiting boost just as its starting to spool .... and as a result, you'll have ALOT more lag than you should expect with a properly suited turbo for cc and power.... Take all the costs envolved in fitting, setting up, and mapping the 35, and offset that against the more suitable turbo.

I chose the SC46 over the MD321, and am massively impressed with it .... on the road it feels like it spools from idle.