Bruce
01-27-2004, 09:41 PM
Yep, 60 PPH, Saturated Injectors.
Which means no internal ecms changes are needed to run them. The low resistance, AKA Peak+Hold, AKA low impedance ones all mean changing the injector drives.
Ken Mosher's admitted they exist now, so I guess I can mention them now. I don't know the pricing or who's going to be handling them but they seem to be really nice. Cold weather has prevented me from doing any serious WOT testing with them but so far so good, as far as having a *clean* idle. I've been running a set in batch fire mode with my syclone ecm project, and they've responded well.
The unique part is that they limit the flow at lower pulse widths, so you don't wind up with a poor idle due to the injector getting erratic with short Pulse Widths. I'm actually running a longer PW at idle with these then the 55s I had been using.
In a batch sampling it was found that they were within 1% of claimed rating, and the one flier in the group was 1.34%. Unlike Accel that claims +- 1.5%, and MSD that claims to maintain a 3% tolerance.
You can see in the attachment they are of the *pencil* type.
Just something to be on the watch for....
2/16/04
Updated
Just to let a little secret out of the bag.
Shhhh, just don't tell anyone, OK guys?.
The Accleration Enrichment is controlled thru pulse width.
The larger the injector the shorter the AE pulse width.
Why?.
Since it's a larger squirt, so it doesn't have to be as long.
*So what*, you say.
When you crack the gas, there is a delay between when the ecm sees the TPS and MAF/MAP changes, filters them, and calculates the new PW. While not very long, there is a delay. Having more fuel delivered quicker makes for better response, AND less chance for Tip-In Preignition. I have alot of time in working out the cal for the 55s I was running, and the 60s are noticebly better. I was at first kinda worried about the 60 not being peak and holds, but that's turned out to be a complete non issue.
Which means no internal ecms changes are needed to run them. The low resistance, AKA Peak+Hold, AKA low impedance ones all mean changing the injector drives.
Ken Mosher's admitted they exist now, so I guess I can mention them now. I don't know the pricing or who's going to be handling them but they seem to be really nice. Cold weather has prevented me from doing any serious WOT testing with them but so far so good, as far as having a *clean* idle. I've been running a set in batch fire mode with my syclone ecm project, and they've responded well.
The unique part is that they limit the flow at lower pulse widths, so you don't wind up with a poor idle due to the injector getting erratic with short Pulse Widths. I'm actually running a longer PW at idle with these then the 55s I had been using.
In a batch sampling it was found that they were within 1% of claimed rating, and the one flier in the group was 1.34%. Unlike Accel that claims +- 1.5%, and MSD that claims to maintain a 3% tolerance.
You can see in the attachment they are of the *pencil* type.
Just something to be on the watch for....
2/16/04
Updated
Just to let a little secret out of the bag.
Shhhh, just don't tell anyone, OK guys?.
The Accleration Enrichment is controlled thru pulse width.
The larger the injector the shorter the AE pulse width.
Why?.
Since it's a larger squirt, so it doesn't have to be as long.
*So what*, you say.
When you crack the gas, there is a delay between when the ecm sees the TPS and MAF/MAP changes, filters them, and calculates the new PW. While not very long, there is a delay. Having more fuel delivered quicker makes for better response, AND less chance for Tip-In Preignition. I have alot of time in working out the cal for the 55s I was running, and the 60s are noticebly better. I was at first kinda worried about the 60 not being peak and holds, but that's turned out to be a complete non issue.