diggingcontractor

put fuel pump 850cc injectors new md194 turbo new 3" straight through exhaust front mount intercooler on got it remapped this aft and when i got to 420bhp gearbox went lost 4th gear im running a 06 2.5 wrx on 5 speed box is there any way of making the box stronger without forking out for a 6 speed ? ive got another hawkeye 5 speed box here in shed but im thinking it will just do the same anyone know what they should withstand

garymate

your running way to much bhp for wrx who mapped it? surprised they even pushed it that far.

jayallen

iTrader: (31)

.........and chances are it will keep going at that kind of power fella, 6 speed, ppg or the scoobyclinic gearset is your only option..

Actually there is another option, drive it like Miss Daisy...

diggingcontractor

lol didnt even get to drive it never got off the dyno lol

diggingcontractor

was told there good for 400 take it that was bad advice

carl heath

Why not start with sti if its more power youre after,then box and diffs should be ok.

diggingcontractor

how much for scooby clinic gear set

kevvy72

that box wont tak that bhp.thats 65 bhp more then what i got on my wrx 2.5

wave bye bye cus yr box will go.deffo hav 2 get a 6speed now.

ps keep a tow rope in the boot lol who mapped it.they should have known better tbh

diggingcontractor

sold my r34 gtr got it as a px only give 4200 for it so figured if it blows up lol when it blows up ill build up an engine for it been thinking of gettin a 2001 sti nick the box and diffs etc and swap for mine then sell it again

diggingcontractor

what does yours run like at 355 i just told him to go to 400 ish

Aamar786

iTrader: (1)

say bye bye to ur engine aswell if ur gona run that power, id get it mapped back down to around 380 and even then ur puchin ur luck, should have got an sti mate. even now ur better off sellin and getin an sti and keep ur good stuuf and put it on that. tryst me mate been there done that mistake. the money ull spend on a gearbox will get u an sti and much much more

Jolly Green Monster

iTrader: (4)

thats a lot of power for the standard 2.5 engine...

sti would have had the 6speed but engine is still similar 2.5.... might be worth going for a smaller turbo and a replacement oe box and mapping it to sensible power level.

Its easy to get big power but for short time.

Simon

diggingcontractor

so map it to say 375 put my spare 5 speed box in and ebay it and buy an sti or is it just the box im short of ? what other benfits are there to the sti i havent already got

Jolly Green Monster

iTrader: (4)

fit you spare box and map to 375 sensibly (would suggest anyone mapping it to 420bhp on standard engine might need their head read) and safely and enjoy.

sti has 6speed and styling extras but nothing else..

the 2litre sti are stronger engines for turning...

Ginola

iTrader: (25)

STI also has a set of brembo stoppers up front (nice if your running more power) the standard subaru 4 pots on the wrx arnt much cop at those power levels.

Jolly Green Monster

iTrader: (4)

yes good call

RICHARD J

iTrader: (4)

Scooby Clinic gear kit is 3k fitted. A six speed can be bought & fitted for less depends what you want. I got my six speed for £1450 but found it needed synchros which cost another £500, but I fitted it myself so still much less than the gear kit. Iv seen Early STIs with 6 speed & brembos for 5k but youd still need to go forged for big power.

Jolly Green Monster

iTrader: (4)

2litre sti engine is fine at 450+. Ran my own at 500 for 20k miles without issue

diggingcontractor

all ready got the brembos bought full set some 18" avanti wheels with yokohama prada tyres on of ebay for 850 so im going to get some cash together and try px my box for a 6 speed

kevvy72

i had mine maped by bob rawle.told im i want the reliability.an thats what i ended up with.355bhp an 408 torque i got b honest without doin the pistons an that,its more then enough for a postie like me.fastest postie in cardiff haha but it is nice 2 drive now.

diggingcontractor

just paid 2k for 6 speed box plus drive shafts prop rear diff half shafts and hubs hopefully they will take the strain