Magown

Blitz951, are you using any kind of ballast resistors? If so where did you get them and how much were they?

fast951

Ballast resistors are about $5 or less each. You need 2 of them. With the Siemens (2.35ohm) you can use 1.35-1.5 ohm (10W) resistors. It's a good idea to mount the resistors on a piece of aluminum to act as a heat sink. Get the Aluminum housed wirewound resistors. I personally never used the resistors and never had a problem. But you decide if you need them on your own.

blitz951

Stephan,
I am still waiting for my GURU chips so have not run the car and have not considered using the ballast resistors at this point. I am not sure if they are necessary.

I noticed you have a 940 turbo, can you recommend any one for parts on that car?

lart951

I ordered 55 lbs injectors from Lindsey on Tuesday, and I was told by Dave Lindsey that there is no need for any ballast.

Magown

Blitz, I can hook you up with just about everything you need on the Volvo. Send me a list of parts and I'll supply you with some prices. I ran the Gtech on my Volvo last night best run was 15.91 @ 87.8 mph.

blitz951

Stephan,
sounds like a good run for the swedish tank <img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" /> I dont need any parts as of yet but when I do I will talk to you, thanks.

ringo951

Danno, How do your injectors compare to the ones blitz951 is using.

Danno

ringo951, I've used those exact same Siemens injectors on my car when I had my MAF-4 kit a couple years ago. Aside from my DME getting quite hot at the track, they worked just fine (didn't know about V=IR back then).

When I started programming chips later, I realized from the mappings I had to do that injectors are not linear devices. Their flow-ratings are tested at a static-flow setting of 100% duty-cycle @ 3-bar pressure. However, when you're using 3% at idle, 10-50% driving around and 60-90% under WOT, the actual flow doesn't scale linearly with duty-cycle.

The Siemens with the ball-end function similarly to the Bosch injectors at idle. But they had a little less fuel than the Bosch at higher duty-cycles (both inject less than computed theoretical amount at higher duty-cycles). Our Dephi units with 6 holes tended to be a little richer than the computed amount compared to both Siemens or Bosch at idle. But they scaled up more linearly which made the chip-mapping easier. As an end-user, I doubt you'd notice any differences (just remember V=IR).

B951S

Recetraonix website lists their low impedance delphi injectors as MSD/Holley????? Is there something I should know about these before I order?? I an ordering 65# but after reading Dannos comments and then seeing the reference to MSD/Holley on Racetronix website I am unsure.

NZ951

I am going to go for the Racetronix Simens injectors. Though I am not sure about running ballasts or not! Some so yes some say no... While running a Link2, whats the go?

cpt_koolbeenz

Will these injectors work with our cars. With 3 bar FPR will that be about 55LB?

http://cgi.ebay.com/ebaymotors/ws/eB...category=33554

B951S

You definately need them with the link. 4 ohms ballasts with 2 ohm injectors is what you will need

Rob

I'm running the low impedence 55# Siemens in mine along with (2) one ohm resistors. I would imagine those are the same.

cpt_koolbeenz

Thanks Rob-
I'd better ****** them up then!

toddk911

Are bigger injectors needed at 300 hp or 300RWhp ???