Injectors?

[rickf_uk]

Hi guys. Last time my car was in for tuning I was told that my stock injectors were running at their max and before I do anything else I should look at up rating them. Question is to what?

At the moment I'm running a maffless LS1 with LS6 ported heads and cam. I'm running about 450 at the rear wheels. The digging around on the net I've done suggests that I should be looking at hi impedance 42lb injectors. I'm hoping later in the year to fit a FAST92mm and TB so that needs to be taken into account.

Any advice welcome. Also do I need to upgrade rails and lines?

[stevieturbo]

Im amazed the standard injectors are making that much power in the first place !


Just fire a set of Siemens 60lb into it. They work very well and are relatively cheap, and would be safe for around a genuine 800bhp or so with the correct fuel system behind it.

You could buy the 42lbs...but whats the point. The Siemens work better, and leave plenty of headroom.

[anonymous-user]

Whs^ 60s will do it but you will need an upgraded fuel system. Speak to Mark at Rapid, he fabricates his own which consists of swirl pot and dual pumps which fit in the existing fuel tank. He can also remap the car to suit on his dyno. My guess is this is the most cost efficient way to get what you need.

Also speak to Roger at Monkfish.

[rickf_uk]

wormus said:

Whs^ 60s will do it but you will need an upgraded fuel system. Speak to Mark at Rapid, he fabricates his own which consists of swirl pot and dual pumps which fit in the existing fuel tank. He can also remap the car to suit on his dyno. My guess is this is the most cost efficient way to get what you need.

Also speak to Roger at Monkfish.

Actually it was Marks suggestion that I up-rate the injectors so you're probably right. Was just a bit worried about it being overkill with 60s' but sounds like thats the plan then.

Thanks guys.

[Moanro5.7]

stevieturbo said:

Im amazed the standard injectors are making that much power in the first place !


Just fire a set of Siemens 60lb into it. They work very well and are relatively cheap, and would be safe for around a genuine 800bhp or so with the correct fuel system behind it.

You could buy the 42lbs...but whats the point. The Siemens work better, and leave plenty of headroom.

If u was interested in these injectors i could help as i work for Britians Second biggest motor factors and i deal with Siemens. So if u get me a part number for them i could phone and price them up and have them sent to u as i have done this for a few guys on here for various bits.

I also deal with Bosch if there is an alternatrive from them. Just need part numbers.

Edited by Moanro5.7 on Wednesday 30th December 17:35

[eliot]

Also branded as Mototrons - "Siemens" is molded into the plastic. I run them in the Dakar, Part number is INJ-GAS-006
http://www.mez.co.uk/dcam/DSCF0617.JPG

I've got a pdf spec sheet somewhere for them also.

From the spec sheet:
CALIBRATION INFORMATION:
Turn Off Time=.85ms @ 600KPa
Turn On Time=1.14ms @ 14VDc
Offset=.055ms
Gain=.110ms/mg
Impedance 12 Ohms (High)
Static Flow 10.8g/s @ 600KPa

Here's where I bought them from a few years ago, they are selling them for $375 a set - which is probably around £300 shipped and dutied in the UK.
http://www.neweraperformanceparts.com/ (right at the very bottom)

Edited by eliot on Thursday 31st December 09:01

[Moanro5.7]

eliot said:

Also branded as Mototrons - "Siemens" is molded into the plastic. I run them in the Dakar, Part number is INJ-GAS-006
www.mez.co.uk/dcam/DSCF0617.JPG

I've got a pdf spec sheet somewhere for them also.

Well all i can do is phone them with the part number and see what they say. Back to work next week and ill let u know what i find out.

[Moanro5.7]

These injector are only avalible from the states

[stevieturbo]

There are plenty of UK sources for Siemens injectors.

[Moanro5.7]

stevieturbo said:

There are plenty of UK sources for Siemens injectors.

Strange i phoned siemens today and when i told them what they were for and gave them the part number the first thing they said was "there only sold in the states" Unless they are imported from the states to this country or they are not bothered to help me

[stevieturbo]

Why not contact any tuning company here ? I'd imagine nearly all carry them in stock.

Although it will likely be cheaper to buy from the US.

[monkfish1]

rickf_uk said:

wormus said:

Whs^ 60s will do it but you will need an upgraded fuel system. Speak to Mark at Rapid, he fabricates his own which consists of swirl pot and dual pumps which fit in the existing fuel tank. He can also remap the car to suit on his dyno. My guess is this is the most cost efficient way to get what you need.

Also speak to Roger at Monkfish.

Actually it was Marks suggestion that I up-rate the injectors so you're probably right. Was just a bit worried about it being overkill with 60s' but sounds like thats the plan then.

Thanks guys.

It is overkill for where you are now. But it gives you expansion room in future. And they are the same sort of money whatever size you buy.

[eliot]

monkfish1 said:

It is overkill for where you are now. But it gives you expansion room in future. And they are the same sort of money whatever size you buy.

Indeed. I was going to run 48's in the dakar - but 60's were actually cheaper and the idle pulsewidth were OK - So I went for it.