Haltech mixing high and low impedances with haltech
12-01-05, 12:52 PM
#1
I have injector envy!
Thread Starter
mixing high and low impedances with haltech
I have a chance to get some low imped bosch 1600cc top feed brown top injectors for my 88 rx7. I believe the 550cc primaries are high impedance.
First of all what do I need to do (smaller orings)? to make these fit in my fuel rail.
and what do I have to do in haltech to account for the high.low imped mix of injectors, and does this cause any problems?
First of all what do I need to do (smaller orings)? to make these fit in my fuel rail.
and what do I have to do in haltech to account for the high.low imped mix of injectors, and does this cause any problems?
12-01-05, 06:48 PM
#2
EFI Tech Wannabe
iTrader: (1)
Join Date: Sep 2003
Location: D.R., USA, the world...
Posts: 2,405
Likes: 0
Received 4 Likes
on
4 Posts
Only pre-88 Turbo injectors are 550cc and low impedance. I would suggest you use all injectors of the same impedance.
After the first half of 88, till the S5 model year, the injectors where high impedance.
Make sure you messure them with a multimeter.
After the first half of 88, till the S5 model year, the injectors where high impedance.
Make sure you messure them with a multimeter.
12-01-05, 10:05 PM
#5
Lives on the Forum
Originally Posted by yusoslo
and what do I have to do in haltech to account for the high.low imped mix of injectors, and does this cause any problems?
-Ted
12-17-05, 10:50 PM
#6
Driveline Killer
Join Date: Jul 2004
Location: OC the wicked 714
Posts: 1,463
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Turbo23
i thought for a haltech, it doesnt matter what they are
It is always better to use the same impedance on a haltech so you don't stress out the injectors.
Use a drill press to enlarge the holes on the rail to make the fuel injectors fit, the 1600's that is.
If your main setup is for high impedance injectors and you want to add some low impedance injectors just use resistors to make them all match up
12-17-05, 11:52 PM
#7
Lives on the Forum
Originally Posted by TurboIIGuy
It is always better to use the same impedance on a haltech so you don't stress out the injectors.
Use a drill press to enlarge the holes on the rail to make the fuel injectors fit, the 1600's that is.
If your main setup is for high impedance injectors and you want to add some low impedance injectors just use resistors to make them all match up
-Ted
Trending Topics
12-18-05, 12:16 AM
#8
Driveline Killer
Join Date: Jul 2004
Location: OC the wicked 714
Posts: 1,463
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by RETed
Bullshit.
Bullshit.
Bullshit.
-Ted
Bullshit.
Bullshit.
-Ted
Please explain your reasoning for discrediting me for I am on a quest of knowledge here.
I have seen alot of guys at the shop hone out the stock rails for the larger 1600 injectors.
It makes sense to have matching impedance injectors on a single driver doesn't it?? I mean after all they have different characteristics given the ifferent resistence and power needed for them.
And for the resistor thing, thats exactly what you do to add GSL-se injectors on to a S5 TurboII so why not somewhere else??
???????
12-18-05, 01:48 AM
#9
Lives on the Forum
Originally Posted by TurboIIGuy
Please explain your reasoning for discrediting me for I am on a quest of knowledge here.
I have seen alot of guys at the shop hone out the stock rails for the larger 1600 injectors.
You gotta be kidding me.
You just insulted all the serious machinist out there...
It makes sense to have matching impedance injectors on a single driver doesn't it?? I mean after all they have different characteristics given the ifferent resistence and power needed for them.
Now you understand why it's not necessary?
And for the resistor thing, thats exactly what you do to add GSL-se injectors on to a S5 TurboII so why not somewhere else??
???????
???????
I HIGHLY recommend you go read the Haltech manual.
It's even DL-able from their website - http://www.haltech.com/
-Ted
12-18-05, 04:28 AM
#10
Driveline Killer
Join Date: Jul 2004
Location: OC the wicked 714
Posts: 1,463
Likes: 0
Received 0 Likes
on
0 Posts
You're right. I didn't litereally mean a rugged old drill press. I did mean for it to be machined. As for the haltech using one driver per injector I was under the impression that the injectors shared drivers from thje way it was explained to me or the way I understood it.
As for the injectors and using a resistor I still don't understand why you can't do that. It's an electrical circuit and all it sees is a resistance through it. So why can't it be tricked??
Anyhow I am actually printing out the haltech manual right now since I already have one awaiting installation.
Thanx for the info Ted.......
As for the injectors and using a resistor I still don't understand why you can't do that. It's an electrical circuit and all it sees is a resistance through it. So why can't it be tricked??
Anyhow I am actually printing out the haltech manual right now since I already have one awaiting installation.
Thanx for the info Ted.......
12-19-05, 06:25 AM
#11
Lives on the Forum
Originally Posted by TurboIIGuy
As for the haltech using one driver per injector I was under the impression that the injectors shared drivers from thje way it was explained to me or the way I understood it.
Normally, each fuel injector (for a 13B) gets its own driver.
It's in the Haltech manual.
As for the injectors and using a resistor I still don't understand why you can't do that. It's an electrical circuit and all it sees is a resistance through it. So why can't it be tricked??
There is a slightly advantage to running low-impedence fuel injectors.
But installing resistors, you just negated that small advantage.
Low-impedence fuel injectors "react faster", so if the driver can handle the current loads, why not let it run unmolested?
I didn't say you was wrong, I meant to imply it's unnecessary to do so.
-Ted
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
