Engine/Transmission (1994 - 1998) Lotsa smoke = BIG POWER

[Swamp Donkey]

Does lots of smoke mean you are making big HP? Or just not burning and wasting fuel?



The reason I am asking this, is because I do have a smoke problem and egt problem. Now I have mentioned in a few threads that my egt's are quite out of control, and by looking at my signature I do not think I am overfueled for a HX 40. I guess I could be, which would suck because I just got it a month or 2 ago.



Would someone who knows a little about these engines be able to get more power out of my truck with the parts I have with less smoke???? What would they do?

 

[fest3er]

Swampy,

Where's your torque plate set? IIRC, if it is more than about halfway to the front stop, EGTs can climb quickly.

If you have too much smoke, make sure the AFC is adjusted correctly and is getting a good feed from the intake manifold.

How much boost do you get? If it's low, that should give you a good idea where to start looking. If you are getting expected boost, then you may well have too much fuel.

Of course, you could always regulate the smoke with your right foot.

Fest3er

 

[Rams-n-Hogs]

How much smoke is too much. Mine smokes like crazy for about the first 100 ft or so, (when I'm on it hard), then goes away, and I'm still on the stock turbo with a 16 cm housing. When I put my 370's in, I talked to Piers about 191 DV's, and he said all they would do is make it smoke more. No real power increase. My EGT's are controlled by my right foot and a valet switch. I don't know what DV's are stock in your pump, but if they're not 191's, I might consider putting the originals back in, at least to see if it helps. Just a thought. I'm still playing with different combo's on my truck to get what I want out of it. I haven't seen more than about 1300 on my EGT's, and that was really getting on it. Boost was probably about 36, and still climbing when I let up. Everything climbed so quick I didn't have time to watch the road and the gauges, and that was in 4th gear. (Wife thought I broke the tires loose). Waiting to get more money for a different turbo, and following threads to see what I want. For now I have enough power to break stuff, so I'm leaving it where it's at. Sliding the plate back, and adjusting the starwheel will help with smoke control, and EGT's. A valet switch will also make a BIG difference.



Jim

 

[vssman]

When exactly is the smoke heavy? If it's right off of the throttle (i. e. , wheels just started to turn), then you may be able to help reduce it by unscrewing the set screw a bit on the back of the AFC housing. It is located under a metal cap next to the boost line. If is smokes all the way up to boost, then you may need an AFC spring kit (properly adjusted). If it smokes at full boost, then bigger turbo(s). You can pick up the spring kit along with a lot of adjusting info from Kurt Yardley (I may have spelt his name wrong) at (505) 534-0434. He helped me. Just remember a lot of smoke for some is not bad for someone else.

 

[Deezul1]

I agree with the others, slide the plate back and tighten up the AFC adjusment to slow down the fueling at low boost . Mine started smoking a lot more than I like when just driving sorta normal and I found the AFC adjustment had backed off all the way so after tightening it back up some the smoke is a lot more managable

 

[DLysne]

Swamp Donkey, in your signature you show you are running a #10 plate, is that right? I was under the impression the #10 plate was better suited for the manual and not the auto. I recently installed a #4 plate in my auto and love it.



I'm not exactly sure on the fuel curve of the #10 plate, anybody else with some more knowledge care to chime in?

 

[JohnE]

Dan;

Glad to see you got the #4 plate. That will fit the GSK install and the governor lever postition in your pump very well. A little better than that #6 pig, uh plate?



A #10 and #4 plate have a very similar "K" shaped profile. The #10 defuels more in the upper rpm curve than a #4.

It is an excellant match with an auto and GSK to control EGT or for those with higher fueling.



Moose;

I have followed your posts for over a year and cannot figure out why your EGTs are such a problem

 

[98rammer]

my truck spools up a lot better with very little smoke on the bottom end than when i make a huge cloud. those that think that they need more and more fuel to get better spool up are wrong. the fuel burns faster when it's leaner (200rpms earlier for me up in this crappy air). smoke doesn't equal power... but it can be fun to play with



rpms have a lot to do with EGT's too. i can peg my pyro in 3 seconds with the #0 plate in, but that because i'm running 2900rpms or so WOT (stock converter)-that's beyond the effiecieny of the stock camshaft. *rarely* do i, but when i go into lockup at full throttle 4th gear, it goes down about 200*.



Tom

 

[Swamp Donkey]

So the 191's could be part of my problem. I will have to move my plate back a bit and play with the afc. The truck is almost useless the way it sits now so I hope a little fine tuning would get me where I want to be. Smoke is not much of a concern to me at all, but Mrs Swamp Donkey is not a huge fan of it and she drives my truck way more than I do. I do have a valet switch, just have to find time to install it. The egt's to get a little old when trying to tow and I am so light on the throttle and not even hitting 20 psi of boost and egts are around 1200 degrees not even going 50 mph up 6-7% grades. Losing speed with all this power and 7/8 of the throttle left is not cool. I don't want to lose the 191's unless they are my problem. Thanks guys.



DLysne,



Piers sold me the #10 over a year ago, said it went well with the Auto and GSK... ... .

 

[Rams-n-Hogs]

My bad. I didn't notice you had an auto until later. I would put in the valet switch first, as it will make a difference. When it's in valet mode, there is very little smoke at any time, and EGT's run cooler and slower, along with less boost. IMO it works excellent for towing. My truck is a manual and I already have the 215 pump, which is why Piers said I didn't really need to change my DV's. I'm not sure about the DV's in the auto pump.



Jim

 

[1dslram]

You need to advance your timing to 17* back off the star wheel and set the #10 plate in the stock position or to the rear of stock.

To take advantage of the #10 plate with an auto you need to add the center spring from the 4,000 rpm kit and change all 12 springs to the H. D. ones. If you do this you may still be overfuled but less so and the smoke will lessen. The 191 DV are notorious for smoke and usually only help those of us over 450 hp.



Another trick with the auto trucks is to raise your shift points for the 1-2 shift to between 1,700-2,000 and the 2-3 shift to 2,000 the set lock-up to about 2,200 and with the shift to 4th at 2,000 to 2,200 this will do wonders in helping the smoke problem. I have done all of the above and can still smoke a lot but it is gray now not black and the EGT's are much better. My pump can only be cut back so far, yours being a 180 pump won't be near the problem that I have. I can cure most of your problems but you are to far away for hands on help.



PM or E-mail me for more info.

Bruce

 

[Cooker]

FWIW - I think the D-Valves added a ton of EGT's. Maybe you can try pulling them out and adjusting the plate and AFC. Just a thought as that is what I am considering.