Engine/Transmission (1998.5 - 2002) Fueling Q:A on Performance

[ToolManTimTaylor]

O. k I am stumped If you check my sig you will see what I am running.



On the Dyno yesterday (60 - 65 degrees and DRY) I made a weird observation. I ran the truck with the blue chip FMS on various settings and found that "Minimum" (If you can call it that) Smoke settings netted power in itself as it ramps power in relation to boost.



THE LESS FUEL I gave it the more power I made. (47% out of 63 in street mode netted me 404. 2 H. P Best)



On drag mode I pulled 379 ... And on street mode 63% I made 385.





Is this a new meaning to OVERFUELED.

On Drag the Smoke was Thick JET BLACK and made a mess and diddn't clean up either! On Drag mode I pulled the fuel pressure down to 11 P. S. I (Love that P. E Pump!)



Just freshly cleaned the AFE filter that resides in the Volant , Fresh Fuel Filter , even used a +6 Cetane Booster upon fill up.



BTW I had 1410 max egt , 41. 5 max lbs of boost and an ungodly 3420 rpm at some point (OOps converter unlocked Gotta get a "Dyno Switch" one of theese days )

Hmmm any Ideas as to why this might be?

I blame the Volant but I diddn't verify it.



Could I have Slipped a bit on the dyno?

I overfilled the trans (19 quarts in with Mag Hyteck Double deep) by a quart or two and that puked out the tube *Note trans temp NEVER went above 150* And I got some feed back from someone that it may have foamed possibly allowing slippage . #ad

 

[ToolManTimTaylor]

Oh and I had to pull my Left OUTSIDE tire to fit on the dyno leaving the right side alone could it be that the extra nut coulda hazed the singe tire to fend for itself?

 

[KatDiesel]

Simple... ... ... you don't have enough air to handle your injectors & BlueBox on drag mode, hence you couldn't clean it up. Thats my take on what happened.

 

[Idaho CTD]

I agree with Kat. It's happening more and more even with people running 40's and B1's. As the hp increases the volume of air needs to as well and everyone's hp is creaping up. All I can say is TWINS

 

[KatDiesel]

I'm in the same boat... ... . I can't clear up Level 5 on the COMP anymore, but I do have a baby B1 (KwikSpool). I'm gonna wastegate it and see what that does. I am even gonna try a "Regular" B1 just to see the differences. After all that i will probably have to work on a twin system setup if I want to be releastic.



Your max temp is nice tho. Can you clear the smoke on the street? Don't always rely on the dyno.

 

[ToolManTimTaylor]

Geez Eric Just when I got used to the PDR 40 too. A 2500 with BD5's and a STOCK hx40 , and comp netted 460. Then 505 with Nitrus on a cold bottle. Thats why I am confuzzled.



Idaho you said the "T" Word I can see it now



Call up the 'ol lady #ad
Hey umm don't buy any food , drink , or clothing this month O. K? I get home to #ad
talk about it and get "What are you smokin?" #ad
cause I want some! I reply DONT BUY ANY WE HAVE TWINS ON THE WAY! Then the look #ad
Then #ad
.

 

[ToolManTimTaylor]

Yes I can clean up on the street. Darkish grey see thru haze.

 

[Idaho CTD]

Originally posted by ToolManTimTaylor

Yes I can clean up on the street. Darkish grey see thru haze.

Your not out of air then. I run BD3's in my 5spd and with my box on there isn't a chance in He!! that it will clean up. DD3's are cleaner then the BD3's but it seems odd that they are that much cleaner. Was it the same dyno that you ran on before? The BD5's are rated considerably higher than the 3's so with that and a difference in dyno's I can see easily see 60hp difference. The reason you dyno'ed lower with higher fueling is kind of a mystery to me if you can clean up the smoke though. The lack of air or fuel pressure is usually what causes that.

 

[KLockliear]

What kind of dyno? Any wheel slippage?

 

[rweis]

I don't know and is why I am asking the question.



Would a XX or XXX cam helped to provide more air and therefore a cleaner combustion?



Bob Weis

 

[KatDiesel]

Originally posted by rweis

I don't know and is why I am asking the question.



Would a XX or XXX cam helped to provide more air and therefore a cleaner combustion?



Bob Weis

Yes, thats the whole point of going to an aftermarket camshaft, allows more air in and more air out.

 

[rweis]

Is the real equation not bigger injectors and bigger turbo, but bigger injectors, bigger turbo, AND cams.



Can someone give a not real technical discussion of what the new cams do? and how they do it? different than the stock one. At what point is a new cam in the hp progression before a bigger injector or bigger turbo?



Looking back a year and a half or so there are few discussions about cams. Mainly bigger and bigger injectors and bigger and bigger turbos and tougher trannys and tougher clutches.



Have the cams come on the scene because the injectors and turbos have gone so far beyond the capabilities of the stock cam and the next way to gain hp is changing the cam? Searching over the last year there are a LOT of discussions of more power with "controlled" smoke. Working the injectors to give the hp but lower smoke, turbos that can run 50#.



Are cams are the next major BOMB?



Bob Weis

 

[BIGDIG]

Originally posted by ToolManTimTaylor

Geez Eric Just when I got used to the PDR 40 too. A 2500 with BD5's and a STOCK hx40 , and comp netted 460. Then 505 with Nitrus on a cold bottle. Thats why I am confuzzled.



Idaho you said the "T" Word I can see it now



Call up the 'ol lady #ad
Hey umm don't buy any food , drink , or clothing this month O. K? I get home to #ad
talk about it and get "What are you smokin?" #ad
cause I want some! I reply DONT BUY ANY WE HAVE TWINS ON THE WAY! Then the look #ad
Then #ad
.

TOOLMAN YOU KILL ME!!!!!!!!! :-laf

YOU SHOULD HAVE HAD SOME OF MY FRESH BREWED COFFEE

 

[ToolManTimTaylor]

Originally posted by rweis



Have the cams come on the scene because the injectors and turbos have gone so far beyond the capabilities of the stock cam

Are cams are the next major BOMB?



Bob Weis

Diesel Dynamics and Piers has 'em if I am not mistaken. Anyway they are going in trucks right and left as we speak!





To confirm clean up yes I made a run on 63% and sure while it was spooling it was thick and deathlike. However once 40 lbs or so came about @ 2000-2400 it cleaned up a bit to a thickish grey haze.

 

[KLockliear]

First, a camshaft by itself will not give a HP increase. Typically, a BOMB'd truck already has a decent amount of power by the time the owner is looking into the investment of buying a camshaft. The higher the HP of a truck, the more it can benefit from a camshaft upgrade.



By increasing the efficiency of the cylinder air charge fill, we can get more air into the cylinder to burn the diesel with. This tends to clean up smoke emissions, spool a turbo up faster, drop EGT's and improve mileage - all beneficial things in the HP world.



A truck without BOMB's or that has little smoke/EGT to deal with likely wouldn't benefit much from a cam. Sure, gains would be there, but not like they are with stepped on trucks.



Bang for the buck, a cam is cheaper than a twin turbo setup as well, and can give good increases in airflow, EGT control, smoke control and the ability to run more fuel. Also, since the cam will not increase boost pressures, o-ringing the head is not required just from a cam.

 

[ToolManTimTaylor]

Originally posted by rweis





Are cams are the next major BOMB?



Bob Weis

Yep and a Ring job too Gee after ringing why not start doing drugs? Hmmm I can see the truck now in rehab.

 

[Huff N Puff]

Dont base all your modification on dyno readings

Use the drag strip to test your mods and fueling desicions,its more accurate to actually see how the truck runs on the road. Cause the dyno cant load your truck like a 1\4mile run can. You will see higher boost pressures on the road full throttle than on a dyno, full trottle.

 

[MD500E]

Huff N Puff, what are you running for a fuel system. I am still running the stock system (shame on me!) and I think my performance has been suffering. You cleaned my clock at MIR. best I could do was a 13. 9 at 96mph. I believe you were running 13. 3-13. 4 (sorry if i got it wrong) and that is with smaller injectors than me. I looked at some digital pictures of my truck half way down the track, and there is no visible smoke out of my exhaust at all? . I plan to upgrade the whole fuel system soon! Do you guys think it will boost my hp any? am I starving my vp-44? PS My fuel pressure never drops below 5psi measured on top the fuel filter housing. thanks,

kevin

 

[Huff N Puff]

I think the difference,may be the fueling box,

I have the Edge Ultimate,drag. The pressures to the VP44 are about 8 to 10psi at WOT. Hope to see you at more events. Merv

 

[ToolManTimTaylor]

Originally posted by MD500E

am I starving my vp-44? PS My fuel pressure never drops below 5psi thanks,

kevin

Well as long as there is pressure you aren't starving the VP However you could allways be better.



I pull down to 11 with the box on kill and granted I do need to change my filter.