friend wants 400 bhp but he was gonna run greys i told him not to so how much will 86lb siemens run ,hes on a t34.will it just be a simple chip/injector change? and at what boost pressure will he be able to run

 

the big siemens injectors will flow enough fuel for over 500 hp and 40+psi of boost

edit, if he only wants around 400hp id go for 55lb ones

 

wont the 56lb be at there limit ? sorry for got to add car 4x4 saff

 

As the miller man said.

I would go for 55s @ 400 hp

 

at wot boost would be safe?

 

Easy to work out, look up the formula I posted on here a while ago, with the website addy where you just input the cc/lbs and details and hit enter does it for you.
What's wrong with greys ?, perfectly good and able IF mapped correctly, as my engine proves 0.97% CO, 137PPM GREYS T3/34 ported head and 200,000 miles on the engine, or is that bad ?
tabetha

 

the problem is tab is that were here in spain and there nobody to do a live map on greys so an off the shelf chip it is

 

Id say on the 55lb's you could still run 32psi

 

I wouldn't bother with 55Ib - go straight for 72 or 83Ib as mine were near maxed at 441bhp

 

I have 72lbs and they'll piss 500bhp.....

 

Realy ? what Turbo ?

I thought 55s were bigger than greys and grey could do 450

 

4 * 86lb are good for about 600bhp depending on your BSFC

 

dont think he wants much more than 400 as 4x4 box will shit itself

 

It'll shit itself with less than that..

 

The 55 lbers will be good for 400 hp no probs and will do 450 hp with the right pump and pressure..
If you need a greys chip for your t34 engine give us a shout we can sort that for you..


cheers danny

 

300 and use it hard and they die fairly often, at 400 3rd gear is properly on borrowed time!

 

I rum Siemens 83lb or whatever and they are way to much for my 400bhp engine. I am running F88 management and the duty cycle is backed right off. I would go back to greys but the spray pattern is better on Siemens, I would have gone to 55lb but we mapped the engine on the 83lb and I have run out of time for an event im on this weekend. To get the AFR to anything nice on tickover they are just about injecting!!

James

 

i did tell him that but hes wants more power had greens for a while now so if it blows which it proberly will he will find out sooner or later