with a stage 3 yb with a t34 .55

at present its running dark greens (brand new 2years ago but have done 1000miles at most),was gonna fit replace with greys that are brand fire new when engine is finished as am worried these may not be able to supply enuf fuel

am i wasting my time thinking about the seimens and just stick with the bosch or as they are a more modern injector go with them as i`m sure i could sell both sets of bosch and be able to pay for the seimens


can anyone advise

Ta

 

I say use 55s

 

Hard to say whether they will fuel to the bhp you want, as we don't know what that amount is.
There is nothing wrong with greys, despite what some tuners have you beleive they don't overnight become scrap because they have found something else they can make more profit on of a different make, they are a perfectly good injector.
I know there is a load of crap going around that greys can't give a good idle good emissions, this is pure bollocks of the highest order stated by people who can't map correctly.
Mine run 0.97% CO 137ppm, with 180,000+ miles on the bottom end, and is 100% rock steady, more than happy to show you the mot printout that shows this.
In short I would use them, but if I were in a position of buying injectors from the start would go siemens purely because unlike greys they are still made.
tabetha

 

I have heard that too that some tuners aren't able to set greys up right so was another reason
Main one apart from fuel supply was the fact they are a more modern unit and I presume will give a better spray and ergo less chance of cocking up and buggering my engine

Power wise was thinking around the 340bhp mark don't want to go chasing numbers just want a tracktable road car that's fun when I want it
Sure 450bhp would be nice to quote in the pub but I wanna drive the thing..!!

Just out of interest what are the power ranges that are reccomended for the seimens

 

No idea on the siemens, but I have not seen any better spray pattern either, or been told of any gains by people who have used both bosch and siemens.
I'd run a mile if they said you can't map greys correctly, my injectors I'm sure were at 56% at 300bhp, once rebuilt will be going 400 though.
tabetha

 

im soon to put my greys in mine and will be getting it mapped up running a t34/48 and im pretty sure that it will be around 340 -350 bhp

 

mine runs 380bhp with 55llb,s siemens


cheers james

 

bloody hell just re-read my post its a t43.48 not .55

sorry chaps

as i have gatthered from all tabethas previous posts its down to good mapping and not the goods probly stick with the greys and flog the 803`s saving selling fees and postage

now who wants some low mileage greens





ps i`ve just got back from the pub

 

what spec you got bud

 

its running ggr t34.63 ,500 cooler ,l8 msd mapped,peaking at 32 holding 28 psi standard head and 500 block,nothing special but totally reliable for two years now


cheers james

 

James, what type of fuel rail are you using ????

 

i think that is the key to what everyone wants reliability without a doubt nice spec there mate

 

One of the guys from CR Turbos(think) had a really nice 2wd with 380 on a T34.48, that is my target, once bottom end rebuilt.
tabetha