wrxsti280

iTrader: (6)

right long story short, my94 sti, front mount intercooler, full decat, roger clark k+n induction kit and alloy trumpet, forge chump valve, simtec ecu, what sort of power should that be running on a standard td05 16g and 380 injectors.

cheers in advance

Glowplug

iTrader: (8)

I would think around 330(ish). Depends on what the mapper considered 'safe', taking into account age,internals and gearbox...

Who mapped it, do you know??

wrxsti280

iTrader: (6)

cheers fella, so 380's will run to that sort of level then?? i was starting to worry that 440'ss would struggle, but i may not be understanding things correctly

Glowplug

iTrader: (8)

I'm no expert, and there are people better placed to give you better advise. But imho, you are pushing the limits at 330.

wrxsti280

iTrader: (6)

Any other peope with input?

wimpy

iTrader: (2)

I would defo change to the 440's as you are probably at the max of the ones you have now. I have the 440s on my94 wrx wagon and after having them flow tested to make sure thay are ok we are well withing the limits and i am running 315bhp. Your mapper should be able to tell you what your current injectors are pushing out. Also fitting the 440's is an easy job and well worth the safty.

wrxsti280

iTrader: (6)

yeh, injectors at the moment are around 97% maxed, wouldnt want to push them any harder than that, my question really is that i am aware of the state they are at at the moment, but im told 440's would struggle to cope with 340 let alone 380's, so wanted some clarification before i go spending on new ones, should i really be going to 550's??? and have plenty of room for improvement.

wimpy

iTrader: (2)

If you are looking to goto that sort of BHP then i would go for the 550's as you can have them mapped to deal with what you are looking for.

bigsinky

if your IDC is at 97% in 380, then 440s or even 550pink would be a better option. you want to be running about 80-85% IDC while on full boost to make things nice and safe. if i was you and could afford the 550s i would be future proofing myself in case i wanted a bit more power in the future. why change the injectors twice when you can do it once (albeit with a bit more expense)

any mapper worth his salt will be able to map the 550s just as well as 440s.

Jolly Green Monster

iTrader: (4)

standard injectors will do 300bhp on a good day

really who ever mapped it should advise with regards to mods, you appear to have everything in place and are held back from good power just by the injectors.

440cc should do 340bhp.. 550cc injectors would allow some head room if you have the budget for them.

Forge dumpvalves unfortunatly I see many failed.. worth checking it, remove is and push the piston in and then put your finger over the vac pipe connection on the valve and the piston should stay push in.. if it doesn't then it is leaking and should be binned imho.

Simon

Jolly Green Monster

iTrader: (4)

the 80-85% rule is a myth and as long as the injectors are still continunig to increase there flow which can be checked during mapping then no need to stick that low.
iirc the ppp map on the newage sti goes beyond 85%, just to demonstrate someone else also ignoring this myth.

550pink injectors are top feed injectors and will not fit on a classic fuel rail.

Agree, there will be no running issues with any of the decent injectors (avoid venom as they are are not well balanaced and will be a pig) once setup correctly.

Simon

wrxsti280

iTrader: (6)

this is where im struggling, mapper states that 380's will do 330-340bhp, but others say that they wont go near that, so looking at options and want to make sure i dont get the wrong thing, no point in going 440's and maxing them if 550's would be better suited and leave some space for improvement later on. my intention all along was to swap the injectors and turbo in the new year funds permitting, but dont want to get the wrong things.

the forge dumpvalve was brand new from roger clarks along with the induction kit, so would be hopeful that it hasnt given up the ghost this early on, but i will check what you have mentioned above, but duncan did say that the car has good vacuum when i suggested the idle problem perhaps being due to dump valve so assume that this is not a problem.

just out of interest, could i blank the dumpvalve take off altogether and run without one??? or does this cause further issues.

Glowplug

iTrader: (8)

There you go. I said there where people better placed, and they don't come much better placed than JGM. Heed the advise offered.

As for your Forge DV. Forge do a service kit for it, piston, seals, spring and grease. I sent them a very nice email and they sent the kit FOC.

Jolly Green Monster

iTrader: (4)

If definitely the grey 380cc originals then no 300 with sensible fuelling

Yes you can blank the dumpvalve off, td05 is strong enough to take it

It was just a precautionary mention on forge dv, not necessarily your issue, dv effectd maf bases much more

dbay

iTrader: (21)

get your money out steve and buy some 550's, no use buying small then having to buy again to meet the requirments



ive got some pink 550's for a classic if you want to borrow them

f4la k

iTrader: (1)

Pink 550's are top feed for the newage.

dbay

iTrader: (21)

ive got some phase 1 side feeds, not newage

wrxsti280

iTrader: (6)

i fully intend getting me money out dave, just got a clutch to sort first, and then finish the mapping off to my satisfaction.

mit

iTrader: (10)

Fitting 550's is something i wish i'd done, instead of the 440's, which are now maxed. 550's are more expensive, but worth it.