Piggysniffer Posted November 24, 2016 Share Posted November 24, 2016 Ok lads n lasses, can you tell me what I would need to do to a 2.5 wrx lump to make a good strong and safe 350bhp, what turbo, piston and/or rods, bearings injectors ? etc etc, am looking at building one hopefully next year to chuck in my hawkeye Quote Link to comment Share on other sites More sharing options...
Seminole81 Posted November 25, 2016 Share Posted November 25, 2016 10 hours ago, Piggysniffer said: Ok lads n lasses, can you tell me what I would need to do to a 2.5 wrx lump to make a good strong and safe 350bhp, what turbo, piston and/or rods, bearings injectors ? etc etc, am looking at building one hopefully next year to chuck in my hawkeye Hmm, are you ever going to want more than 350? Because you need to build around the turbo sizing. FP Green could get you to 400 pretty easily. But there's loads of turbo choices. Think someone did a thread in the general Subaru area with a list? pistons & rods, Weisco pistons, Carrillo Pistons and rods or Eagle rods? ARP if they make them? Maybe check into head studs etc as well. Injectors at least 800cc probably 1000 I'd say, RC Engineering does good ones. Bearings, Clevite (spelling?) do the ones for NASCAR so they're good. Or there's good ol' ACL as well. Quote Link to comment Share on other sites More sharing options...
stants Posted November 25, 2016 Share Posted November 25, 2016 1st off Convert the block to closed deck Sent from my SM-G930F using Tapatalk Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted November 25, 2016 Share Posted November 25, 2016 440's will run 340hp on a classic so 555cc sti injectors will reach the 350hp target easily but you get bigger injectors you'd always have headroom for a power increase when "project creep" sneaks up on you [emoji23] I'm not sure what the limit is for a standard 2.5 ltr block tbh . Afaik you'd be fine @ 350hp with standard rods with just uprated pistons to rid the Ringland curse . But yet again if your gonna spend the time building it and the money on gaskets for the rebuild you might as well go for a bit more headroom .... Cossie/rcm headgaskets. Uprated headstuds and pistons. H or I beam rods . Most use rcm or g goode oil pumps and acl race shells. I think "pinning " might be a bit cheaper than cdb inserts but I'd go the whole hog and get it cdb converted if I was gonna build a 2.5 . Quote Link to comment Share on other sites More sharing options...
aucky Posted November 25, 2016 Share Posted November 25, 2016 my wrx hatch is 320bhp, for the roads i think it has enough 3" decat VF52turbo,from what i have read its off a new shape forester so intercooler can bolt straight on to it instead of a hose like sti,also read late wrx's had same turbo?its the same as a VF39 but the 39 uses a hose for intercooler and suffered boost creep. front mount intercooler RCM 340 fuel pump Quote Link to comment Share on other sites More sharing options...
Seminole81 Posted November 25, 2016 Share Posted November 25, 2016 my mate in the States ran a FP Green, and a full turbo back exhaust and had t mapped on a hawkeye STI for years with no problems mind and I'm pretty sure he was pushing 400 horsies. They don't need too much to make decent numbers from what I've read. 3 hours ago, savage bulldogs said: 440's will run 340hp on a classic so 555cc sti injectors will reach the 350hp target easily but you get bigger injectors you'd always have headroom for a power increase when "project creep" sneaks up on you Why I was thinking bigger injectors 😂 If you're going to spend the dough, get the bigger ones like you say haha Quote Link to comment Share on other sites More sharing options...
Tidgy Posted November 25, 2016 Share Posted November 25, 2016 Standard 2.5 block will run 450 reliably so closed decking is a tad ott. Rebuilt with decent pistons, rods headstuds, gaskets and rebuild. Plenty of turbos in that range. So depends how much you wanna spend. Personal choice would be sc36. Will run 360 and spool like a rocket. Need fuel pump and injectors plus inlet pipe. Be cracking on the road with that spec Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 25, 2016 Author Share Posted November 25, 2016 I would like to go 1000bhp but I have to be realistic 🙄 I'm not made of money so I have to set myself a target/limit, but in saying that not worth building something that'll just handle 350bhp, I want a car that has a good bit of power for not an extreme amount of money as the credit cards gonna take a broadside to do it lol and I want it to be reliable, would be nice to factor in a bit of leeway for reliability or for a bit of extra power one day if funds allowed, but tbh I can get myself in the mire with 277bhp so 350/60 as tidge says would surely be enough, I don't really have funds for stronger gearboxes so I was thinkin around the 350 mark would be OK, and doable mo ey wise, would have to do clutch for sure, the wife is cool with it, soon as I've paid the card up I can abuse it for the engine 😜 Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 25, 2016 Author Share Posted November 25, 2016 1 hour ago, Tidgy said: Standard 2.5 block will run 450 reliably so closed decking is a tad ott. Rebuilt with decent pistons, rods headstuds, gaskets and rebuild. Plenty of turbos in that range. So depends how much you wanna spend. Personal choice would be sc36. Will run 360 and spool like a rocket. Need fuel pump and injectors plus inlet pipe. Be cracking on the road with that spec Liking that mr tidgy Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 25, 2016 Author Share Posted November 25, 2016 Ooh them sc36 ain't cheap lol Quote Link to comment Share on other sites More sharing options...
Tidgy Posted November 25, 2016 Share Posted November 25, 2016 Haha no mate. Rare as rocking horse poo second hand as well :( Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 25, 2016 Author Share Posted November 25, 2016 Ok, well now I know lol anything else cheaper nearly as good ?? Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted November 25, 2016 Share Posted November 25, 2016 Could always wait until we've got a better trade deal with America and buy a blouch (re branded sc ) or fp turbo from the states [emoji6] . Second hand md based or genuine tdo5 18g would hit the target power for about half the price of a new sc36 . Or get someone like Owen developments or turbo dynamics to refurb a fubar'd turbo to your needs . Which is the route I thought I'd take with my £200 aps sr40 (gt28 based stock location turbo ) well when I eventually blow it up [emoji23] Quote Link to comment Share on other sites More sharing options...
aucky Posted November 25, 2016 Share Posted November 25, 2016 3 hours ago, Piggysniffer said: I would like to go 1000bhp but I have to be realistic 🙄 I'm not made of money so I have to set myself a target/limit, but in saying that not worth building something that'll just handle 350bhp, I want a car that has a good bit of power for not an extreme amount of money as the credit cards gonna take a broadside to do it lol and I want it to be reliable, would be nice to factor in a bit of leeway for reliability or for a bit of extra power one day if funds allowed, but tbh I can get myself in the mire with 277bhp so 350/60 as tidge says would surely be enough, I don't really have funds for stronger gearboxes so I was thinkin around the 350 mark would be OK, and doable mo ey wise, would have to do clutch for sure, the wife is cool with it, soon as I've paid the card up I can abuse it for the engine 😜 you could sell a kidney to get the money 1 Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 25, 2016 Author Share Posted November 25, 2016 I don't think they work that well mate 😳 Quote Link to comment Share on other sites More sharing options...
Seminole81 Posted November 26, 2016 Share Posted November 26, 2016 Start with the little things first, injectors etc. You should be able to push a decent amount out of the stock turbo? And if you're planning on rebuilding, then I'd just run it on the stock internals until it blows personally 😉😂 Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 26, 2016 Author Share Posted November 26, 2016 Gonna get another engine/long block and build that mate, otherwise too much down time :) 1 Quote Link to comment Share on other sites More sharing options...
Seminole81 Posted November 26, 2016 Share Posted November 26, 2016 15 minutes ago, Piggysniffer said: Gonna get another engine/long block and build that mate, otherwise too much down time :) Good idea Quote Link to comment Share on other sites More sharing options...
Tidgy Posted November 26, 2016 Share Posted November 26, 2016 23 hours ago, savage bulldogs said: Could always wait until we've got a better trade deal with America and buy a blouch (re branded sc ) or fp turbo from the states . Second hand md based or genuine tdo5 18g would hit the target power for about half the price of a new sc36 . Or get someone like Owen developments or turbo dynamics to refurb a fubar'd turbo to your needs . Which is the route I thought I'd take with my £200 aps sr40 (gt28 based stock location turbo ) well when I eventually blow it up Not the same turbo. Sc are clinic specific. Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted November 26, 2016 Share Posted November 26, 2016 I dare say they're not 100% the same but I'm sure s.c turbos are made by blouch ? If so I'd imagine you can probably buy 1 close to the spec they provide for s.c . I just hope we can get better import deals with the U.S , as they seem to have more budget friendly priced aftermarket scooby stuff. Well Compared to the expensive European alternatives that we find over here . Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 26, 2016 Author Share Posted November 26, 2016 I am itching to get this build started tbh Quote Link to comment Share on other sites More sharing options...
Tidgy Posted November 26, 2016 Share Posted November 26, 2016 1 hour ago, savage bulldogs said: I dare say they're not 100% the same but I'm sure s.c turbos are made by blouch ? If so I'd imagine you can probably buy 1 close to the spec they provide for s.c . I just hope we can get better import deals with the U.S , as they seem to have more budget friendly priced aftermarket scooby stuff. Well Compared to the expensive European alternatives that we find over here . Blouch made, custom billet design core Slight differences can make a massive difference to performance. Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted November 27, 2016 Share Posted November 27, 2016 Yeah I know hybrids make more power than oe spec and I'm not jumping on the "slagging off s.c bandwagon " buddy . Just the likes of a s.c 42 is a cracking turbo but at nearly £1.8 k delivered I'd never be buying one . If I did I'd have to sell my sti saloon and buy a leggy estate ,so I could fit a bed in the back [emoji23] . So I'm always on the lookout for something cheaper too sneak past her radar [emoji6] 1 Quote Link to comment Share on other sites More sharing options...
Piggysniffer Posted November 27, 2016 Author Share Posted November 27, 2016 C'mon now you two ! C'mon ! Quote Link to comment Share on other sites More sharing options...
Tidgy Posted November 27, 2016 Share Posted November 27, 2016 1 hour ago, savage bulldogs said: Yeah I know hybrids make more power than oe spec and I'm not jumping on the "slagging off s.c bandwagon " buddy . Just the likes of a s.c 42 is a cracking turbo but at nearly £1.8 k delivered I'd never be buying one . If I didn't I'd have to sell my sti saloon and buy a leggy estate ,so I could fit a bed in the back . So I'm always on the lookout for something cheaper too sneak past her radar Didn't take it that way so no worries, was more a comment as to the difference :) How much you want to spend very much depends on budget and what you want from it. 1 Quote Link to comment Share on other sites More sharing options...
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