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Suitable Engine Build?


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hi there,im going to build a decent engine for my 95 wrx,my current engine is 311bhp/276 torque,running fmic,walbro pump,ajustble fpr,full 2 1/2" straight through exhaust(3"turbo down pipe)with stainless steel headers.its going to be mainly for trackdays and not high power,just reliable 350/350.my question is do i really need uprated pistons/rods for this modest power output? or could i get away with a standard rebuilt motor with uprated head gaskets and arp bolts? obviously i would be going down the apexi route with a more suitable turbo.other things i have no idea about are the standard wrx heads,are they ok? or would v2 sti be any better? my budget wont(cant haha) go beyond the £1.5-2k i will be doing the work as much as possible myself too,i know this opens a can of worms in regards to gearboxes ect but i want to focus on a reliable engine first,thanks bryan

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Hi mate, not sure of a proper answer to your problem.. but if I was you I would phone around a few of the engine builders etc. and ask them what they think. Aside from that there will be plenty on here that can also tell you what you need to know, so be patient and I'm sure they'll be along soon!

Cheers,

Mark :driving:

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I would think you could get 350bhp reliably with what you have plus an apexi with a good map!!! Wouldnt think there would be any need in going for V2 heads...yours should be ok!! you don't really need to go uprated head bolts etc as you only need to go for that when your going down the big boost route......the uprated head bolts then help stop head lift!! If i were you i would also get it mapped for a 10% methanol mix as that will keep the det right down low and methanol is cheap as chips!!!

Thats my opinion

Jase

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buy an sti or ra why?? if i build a decent motor,why would an sti or ra be so much more suitable(i have an ra box and diff already ,non dccd,if that's the main difference) this is a question also by the way, not an attack on you scoobzie haha.i am 100% going for apexi or similar with bigger turbo and remap,but want to make sure the engine doesn't just last 5 minutes as its had a sore life by the previous owner,so a rebuilt engine in my opinion is a good idea,its just the best way to go about this,whats the best head gaskets,bearings etc to use?.that's good news that the standard wrx heads are up to the job,i also hear that rebuilding with a reground or used crank is bad news on a subaru? thanks for input bryan

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ok if your only looking for 350/350 a normal STi would be perfectly suited, however your looking to do trackdays as well so i would recommend you go with the forged pistons etc as for head gaskets i went for the cometic steel triple layered jobby last time round and will use them again this time round they seem more than up too the job, ARP head studs the 11 ml ones are good for the power your after the 14 ml ones (i think) are mostly for higher power builds and people who have a fetish for large ammounts of boost, the WRX heads should be ok for 350 as well

If your looking for a fully forged build try enginetuner i just picked up a 2.1 stroker in a Closed Deck Block with rear thrust conversion and 14ml headstuds for a pretty good price, you could go for the same 2.1 stroker in a open deck block or semi open deck (no need for the rear thrust conversion with these) and 11 ml head studs for just a little bit more than you mentioned in your first post

hope this helps

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ok if your only looking for 350/350 a normal STi would be perfectly suited, however your looking to do trackdays as well so i would recommend you go with the forged pistons etc as for head gaskets i went for the cometic steel triple layered jobby last time round and will use them again this time round they seem more than up too the job, ARP head studs the 11 ml ones are good for the power your after the 14 ml ones (i think) are mostly for higher power builds and people who have a fetish for large ammounts of boost, the WRX heads should be ok for 350 as well

If your looking for a fully forged build try enginetuner i just picked up a 2.1 stroker in a Closed Deck Block with rear thrust conversion and 14ml headstuds for a pretty good price, you could go for the same 2.1 stroker in a open deck block or semi open deck (no need for the rear thrust conversion with these) and 11 ml head studs for just a little bit more than you mentioned in your first post

hope this helps

What turbo will you be using with your new build Dunk and what power do you expect.

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Should still make a capable tool for the hills and sprints.

yea should be ok for a little bit of fun with some decent boost, even when i do get back into a steady job and have a few quid to burn i wont be chasing silly figures either a MD321H or the T would suit me, the downside to the 2.1 is lag compared to the 2.5s etc so would rather have something that spools relatively quick and is still fun to drive than a mega horsepower lag monster lol

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If your looking for a fully forged build try enginetuner i just picked up a 2.1 stroker in a Closed Deck Block with rear thrust conversion and 14ml headstuds for a pretty good price, you could go for the same 2.1 stroker in a open deck block or semi open deck (no need for the rear thrust conversion with these) and 11 ml head studs for just a little bit more than you mentioned in your first post

hope this helps

Didn't know you where getting 14mm headstuds....why did you go for them when you don't really need it unless you where wanting to run a bigger turbo?

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I know what you mean....i have also gone the same way as you and Dunk and i have ended up spending loads on extras!!! but hey.....its all good fun!!! :thumbup:

its all good fun, but going to send me bankrupt, ive still not stopped with the extras even since my car went down to plymouth for its hols :)

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its all good fun, but going to send me bankrupt, ive still not stopped with the extras even since my car went down to plymouth for its hols :)

Alan installing your engine Scot?

I thought hypertec was doing that.But hey when are you getting your car back?

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