In no way am I knocking the kennebell, in fact I realize that it is the one mod that should add the most power in the never ending quest for lower ET's. After adding the KB and #50 injectors my MPH went from 109 with the stock eaton to 107 with the kennebell. I am running a 6lb lower and a 3.5 upper. I am seeing boost start off at 10 lbs then slowly rise to 14 lbs. In searching past posts I have found that some see fluctuating boost levels while others claim to have "rock solid boost" through out a run. My question is should the boost be solid or is it normal for the boost levels to slowly climb through the run? Is belt slippage the most likely problem? Just a little frustrating to spend the money for the new blower and loose 2 tenths instead of gaining 5. Thanks for you input.

 

Did you have your truck tuned for 50# injectors and a KB?

 

Injectors and maf have to be tuned together, dont they? I would talk to who ever is tuning that bad boy.....maybe you are starving for fuel? Have you checked your a/f? I would do that with a KB before putting it on the track!

 

I went from a 8# lower , 2.75 upper Eaton combo to the KB 8# lower , 3 inch upper combo with 55# injectors and gained substantial hp & torque. I was making 398hp with the Eaton setup and went to 628 with the KB. There have been problems along the way like a maxed out MAF and fuel delivery problems but once fixed I could not complain other than 3 sets of head gaskets lifting. Good Luck in finding the Demon Tweak that will unlock your motors true potential.

 

yes, the chip was re-burned for the new combo.

 

Welcome NJfastruk

Well you surly are in the right State to get help,
You got JDM + Outrageous Peformance in your backyard,
and Johnny Lightning and PSP a mere state away in two diff directions

Obviously SOMETHING is wrong
As you said a fliter chip n pulley L will run that MPH w/ a stock Eaton, you should see AN EASY 50 HP and 1/2 - 3/4 of a sec off your ET. (would think the MPH belongs @115)

How is it running ? What was your 60ft ?
What kind of tune do you have ?
Do you know your Timing and A/F ???

JLP + JDM have been tunning KB's for a long time,
both are prob within a hour or so ride of you,
PSP is Prob a couple of hours, I would schedule a Dyno Tuning Session and get that bad boy running like the Beast it is

 

Oh sorry, in case you happen to not know,
these people I talk about are Supporting Vendors Here.

Here's the links to all our Supporting Vendors:
In Numeric listing of course

What Chip are your running
JLP is Diablo
JDM is Super Chip
PSP is Autologic / EEC-V, New Style Diablo (Black Chips only),
and also Super Chip / SCT now too


http://www.chikenearsengineering.com/
http://f150online.motorhaven.com/customer/home.php
http://www.johnnylightningperf.com/home.asp
http://www.outrageousperformance.com
http://www.powersurgeperformance.net/
http://www.razorsedgemotorsports.com/
http://www.teamjdm.com/
http://www.trixtersracing.com/
http://www.troyerperformance.com/cgi-bin/ppistore.pl

 

Well, there is something wrong here. I picked up 8 MPH and dropped more than a half second on my ET after the KB install. Don't blame the KB, find the REAL problem before you BASH. As was already stated, there are several choices JLP, JDM, PSP to help you dial that puppy in, good luck.

 

I'm not sure where you got the impression that I am bashing KB. If you read the first sentance of my original post you would see that in no way am I bashing, just trying to diagnose the problem. One of our supporting vendors is doing the work on my truck but in no way do I want anyone here to get the wrong impression of their work. Back to one of my original questions, should my boost be fluctuating or is it normal to see the boost gradully climb throughout a run?

 

The boost will climb throughout the run. The faster you spin it the higher it climbs. I believe that at low boost levels the KB won't e.t. as well as the Eaton. At 14 psi for example, an Eaton will have the 14 psi almost immediately and hold it through every gear. The KB will start at 10-11 psi and climb to 14 psi at the shift. So you're giving up some torque and power down low and gaining some at top, but not sure it makes for a faster truck with low boost. Now at 18-20+ psi of boost it's another story because the Eaton is out of wind and way out of it's efficiency range, whereas the KB is just getting going.

I have one on my 03 and although I've gained up top it feels like it has less torque on initial throttle than the Eaton. I plan a built motor to eliminate that issue with a lot more boost. I am currently running 16 psi at the shift (13 or so initially) and it's as far as I dare go with the stock block. I do have alcohol injection which allows more timing which pretty much made up for the lack of low end.

Jody

 

Sorry, my bad. Anyway, I don't think your boost should fluctuate while being applied. It should gradually increase from past experience. I think a trip back to your vendor is in order to get this under control.

 

Did you use some kind of silicon or gasket maker between the top plate and the blower? I've seen some problems where there have been vacuum leaks there.

 

camcojb, your completely backwards. The twin screw (KB) will go to max boost almost immeditely at wot, and hold that boost. The roots (Eaton) will gradually build boost, until it produces too much heat then gradually drop. In neither case should boost fluctuate in a non linear maner.

 

Does that mean that the Eaton makes less boost after it starts "making too much heat " ?

Or does that mean that the Eaton runs out of boost at higher RPM's with huge pulleys ?

I find it hard to believe that there is a cause and effect relationship between the heat and the loss of boost.

 

That is the EXACT opposite of what I've seen, and I've seen many...