KB Installation help please

[goshia]

Okay I'm at the point where I am installing the fuel injectors onto the KB, but what a B they are to install. I have torn 2 o-rings and then ran down to the local ford shop and purchased a package of o-rings Part number CM-4717 will these o-rings be okay to use? They do fit into the supercharger much better.

 

[Gearbanger 101]

Use a little vaseline on the O-rings and they'll slide right in, slick as snot. And yes....the Ford O-rings will work as long as they're for the same style injector.

 

[GitDat]

I see you have 3.73's. I'll be going from 3.55 to 3.73's this week. I wonder how much of a difference I'll notice

 

['03GTinFLA]

Yeah those injectors were tough to get in. I thought I had the wrong injectors for a while. I lubed them up and shoved them in there and it's all good.

 

[goshia]

I see you have 3.73's. I'll be going from 3.55 to 3.73's this week. I wonder how much of a difference I'll notice

I don't think you will see a noticeable change in performance going from 3.55 to 3.73

 

[goshia]

Yeah those injectors were tough to get in. I thought I had the wrong injectors for a while. I lubed them up and shoved them in there and it's all good.

Yeah I think I am going to have to order new o-rings from KB the Ford ones went in way to easy. I have the o-ring for a 03-04 cobra. Don't think there are going to work. I will call KB about 50 times tomorrow most likley before I get thru

 

[hotmustang331]

I see you have 3.73's. I'll be going from 3.55 to 3.73's this week. I wonder how much of a difference I'll notice

Your going to notice that your crossing the traps @ 6100RPMs lol. But that may not be THAT bad for you since you probably dont have valve float.
If I had 3.55s I wouldnt swap them in for 3.73s if I were you...thats coming from a 3.73 guy.

 

[GitDat]

Your going to notice that your crossing the traps @ 6100RPMs lol. But that may not be THAT bad for you since you probably dont have valve float.
If I had 3.55s I wouldnt swap them in for 3.73s if I were you...thats coming from a 3.73 guy.

http://www.corral.net/tech/gearcalc.html

According to this gear ratio calculator I should be good in 4th up to 126mph at 6000RPM That still gives me a little breathing room. That's down from 132MPH with the 3.55's so it shouldn't be too shabby.

 

[hotmustang331]

this is what I get with 315/35/17 rear tires like I have and the T-45 in 4th (99-00 trans...4th is 1.0-1 like the TR-3650)

Corral RPM / SPEED / GEAR Calculator
Engine RPM: 6000
Vehicle Speed: 122.897026299583
Read End Gear: 3.73

I was crossing @ 120-122 and showing 6000-6100RPMs. I have checked mine with the EEC digital read out to over 5000 and it stays within 100RPM of accurate.

I know one thing, on the dyno my car floats the valves past 5800...and my car was laying over badly about 150' from the end of the track .

EDIT: I even tried it with the stock 245/45/17 tires...same thing 122.8. Do you have 05+ stang size tires?

 

[GitDat]

this is what I get with 315/35/17 rear tires like I have and the T-45 in 4th (99-00 trans...4th is 1.0-1 like the TR-3650)

Corral RPM / SPEED / GEAR Calculator
Engine RPM: 6000
Vehicle Speed: 122.897026299583
Read End Gear: 3.73

I was crossing @ 120-122 and showing 6000-6100RPMs. I have checked mine with the EEC digital read out to over 5000 and it stays within 100RPM of accurate.

I know one thing, on the dyno my car floats the valves past 5800...and my car was laying over badly about 150' from the end of the track .

EDIT: I even tried it with the stock 245/45/17 tires...same thing 122.8. Do you have 05+ stang size tires?

Ah, that's the difference. I have 305/35/18 in the rear so that must be why the MPH is a little higher for me.

 

[hotmustang331]

^Yep there it is . Actually I really wish I had your wheel setup now LOL...I really hate running out of gear at the track . A. its hard on the engine. B. Its hard on my trap speed.