What's the max bhp you can safely see on 55lb siemens injectors? If I'm pushing 380-400 bhp with a T34 and live map will the 55lbs suffice?

 

Piss that power mate,420-450 they'll do.... maybe more..

 

i had theses on my 420bhp engine as said above mate 420bhp- 450bhp

 

+1 i have 420bhp with Siemens 55lb

 

you can run any t34 flat out on these injectors

 

Your Escort looks sweet! Very good.

That's all the injector I need then thankyou all. What do the bigger 63lb siemens do upto then just out of interest?

 

Sorry for the delay...many thanks!!

 

It's only been 5 months

 

whats the limit for 83lb's then?

 

They'll do over 500 Ran easily...

Then i guess it's 1000cc..

 

Had a 4x4 cossie on a t34 live mapped at Msd and stu told me that my 55ilb siemans were on there limit

 

nice - im happy with that

just noticed our sigs...3dr's smoking the rear tyres out

 

ahahah...yes, but better late than never..

 

A T34 is NOT a 400bhp turbo - it will do 400 but will on its knees and not last as long. This is a 370-380bhp turbo if you want it to last

A T38 is the next logical step upto around 440ish and after that its GT30 or T4 territory imo

 

so theres plenty power left in mine then?

 

what you got, T38?

defo more in it

 

Wennys old engine we mapped was running 83s pretty hard, they do good power. i think he had a 44psi spkie on the roller T4

we were having problems keeping the laptop open, it kept slamming shut as it came on boost

Its a shame they are running out, i think we have the last of them here in stock, i dont think anyone can get hold of them anymore.

 

44psi what map sensor - 5 bar?

bet that was lively and how the fook do you map it when its like that? big balls imho lol.

Im hoping to run mine fairly hard but want it to be reliable, i hoping to hold 2 bar to the limiter and nice spike in the mid range

 

done on a 3bar, just plenty of fuel in the map.

5bar sensors are a bit grim on weber imo

 

i didnt think the 3bar map sensor could see that much pressure - you learn something new everyday

 

well, it cant see past its maximum pressure, but you can fuel the top lines for what ever you want, the map sensor just says maximum,

you can get issues, as an example, where you fuel the top lines for 40psi, but obviously it will then be rich at 30psi, because there is fuel there for 40psi and from 30 to 40 the map sensor is still only saying maximum,
But, generally they dont stay at 30psi for long as revs are climbing very fast in those circumstances.

I think its a much better comprimise, than re scaling the whole map to work with a 5bar and the limited break points within, You would be comprimisng the drivability doing it that way, and thats what most cars need to be best at. They spend most of the time in cruise and idle, so the more control you have down there the better really.

 

It can't

Read what James wrote

Steve

 

nice - good job then as the parts i have gathered will work then

cant bloody wait for anti social behaviour

 

it'll work - as long as i have more than 450 bhp i will be happy - close to 500bhp and i will be doing the bhangra light bulb dance all around my mates workshop

 

You mean as long as its more powerful than mine

Steve

 

t34 mate...

wantin more power but dunno what route to go down with the current spec.

 

Are the the Siemens 55lb injectors a direct fit to Cossie, how about Bosch grey injectors? There's been talk that they no more make the 55's so the grey injectors are probably the choice for Stage 3... If anyone have the correct part number for Siemens 55's I'd like to know it, in case I find a set of those.

 

I'd wait a little as i'd imagine the tuners will be looking for an alternative injector than going back to 803's or 403's. Speak to Stu at motorsport-developments he'll be able to advise you on your needs

 

Okay, thanks for the advice. But the seems like the 55's would still be a good option in case one just happens to find a set second hand or something. I've seen some tuners (not Cossie though) using Siemens DEKA injectors (600cc) but these seem to be high-impedance ones as Cossie requires low-impedance I guess. But yes, MSD and other tuners probably look for other choices too.

 

different in what way?

 

Maram shafted for a start...

The turbo brand new cost me less than £500 it is on trial .. It's done 1400 hard miles upto now with no issues and god knows what punishment while mapping where it was running 38psi ...but the engine could not consume 38 in the end. .. It will this year tho as the engine is going to run more boost.

 

the siemens are no longer made, but yes they are a direct fitment. You may be able to get a set from USA 2nd hand. you are looking for siemens deka 55lbs (3102) low impedance (2.8ohms) injectors

IIRC you need a fitting kit for bosch injectors

 

Ty for the info. BTW, I found this link:

http://www.fiveomotorsport.com/10399us580-570/580cc

The site claims that they have direct replacement injector for the Siemens 55's.

 

i ordered my siemens from this company, but i cannot answer if the replacement injectors are of good quality or not