Engine/Transmission (1994 - 1998) Low Dyno #'s = something not right??

[Got Smoke?]

Low Dyno #'s = something not right?? *UPDATE*

Ok I dynoed at our annual KYDTR event this weekend on David Dunbar's mobile Dyno Jet. You can see my whole setup in my sig, but yet I only dynoed 263HP 636TQ?!?!? #@$%! :-{} :{



Ryan... tried to say something was wrong with the truck, or I didn't actual PDR 370's... . but I know the latter is true.



Just wondering what the hell is up with the low #'s? I was expecting much more closer to 300, but not much more than that.

 

[TrqMonster]

Low HP

Could be that even with your stock plate slid all the way you still are not getting enough fuel to feed your 370's?

 

[Got Smoke?]

Could be that even with your stock plate slid all the way you still are not getting enough fuel to feed your 370's?

Highly doubtful, I get a decent cloud of smoke from a dead stop.

 

[JAmos]

same problem here

I just installed 370's yesterday and am dissapointed in their performance. Almost no difference that I can tell. Is my poor little 160 hp pump in need of more modifying to turn loose some more fuel? I have heard that the 160 pumps sometimes need delivery valves to work right, is this the case here? Do I need more timing to make them work better? TIA Jordan

 

[vssman]

Jordan,



Bump the timing to 16. 5°. You'll get a better burn of the fuel charge, less smoke, lower egts, maybe a little better mileage (at $2. 00 +/gal who doesn't want that), and a quieter engine at idle.

 

[Jim Fulmer]

1. Here are some numbers to chew on, a properly setup 215 pump truck with 370's and a #10 plate, 3K's ect should be at 425-450HP and plasma torch EGT's.



2. A Little pump truck should be at 350 or so.



3. You guy are too from away from me.



I need a few more 12V's to learn from



Jim

 

[Got Smoke?]

1. Here are some numbers to chew on, a properly setup 215 pump truck with 370's and a #10 plate, 3K's ect should be at 425-450HP and plasma torch EGT's.

Yeah I know Jim, that's the EXACT setup I had in my previous 97... . YES I could bury the EGT gauge at will. :-laf



That's why I'm worried what's wrong with my truck



A buddy of mine recommended checking the timing, I know its been fooled with but do not know where its at. I was only *told* that it was done by Jeff Garmon before I bought the truck.



263HP on a 215HP pump with 370's and a slid plate it a embarassment!

 

[TrqMonster]

smoke

I could be wrong but just because you get lots of black smoke doesnt necesaaily mean you should be making tons of power. I am no expert but sounds like maybe you are dumping in lots of fuel (purpose of 370's as I understand) but not enough boost to do anything with it. I dont recall seeing anything about increasing your boost. I think that is why for example in the TST kit you get a new plate and a fitting that will increase boost. More fuel requires more air unless I am wrong.

 

[Got Smoke?]

I could be wrong but just because you get lots of black smoke doesnt necesaaily mean you should be making tons of power. I am no expert but sounds like maybe you are dumping in lots of fuel (purpose of 370's as I understand) but not enough boost to do anything with it. I dont recall seeing anything about increasing your boost. I think that is why for example in the TST kit you get a new plate and a fitting that will increase boost. More fuel requires more air unless I am wrong.

No TON'S of smoke does not mean HIGH HP... ... it just means your dumping much more fuel than you can completely burn.



*Notice* I said I get a decent cloud from a dead stop..... it clears up almost instantly! As soon as I build any kind of boost it clears the smoke up to almost nothing. I have a boost elbow installed in my AFC housing, even though I am only running the stock plate full forward. I think it might be my timing, or possibly my intercooler boots cause I've already had to replace one.



Just wish I had the $$ to drop for a new set of boots and be done with that mess.



Just trying to get some help in figuring out what it might be.



EDIT: Here is a pic of my truck on the dyno..... can you even see the VERY SLIGHT haze in front of the right rear wheel?

 

[TrqMonster]

Well I will leave it up to you experts then. I am just an idiot.

 

[JGK]

Mark,



Where's the governor lever contacting your plate now that it's been moved fully forward? That is, have you checked/adjusted it? Perhaps its not allowing all the fueling you should be getting because it's too low on the plate's profile.



Another suggestion: what about just pulling the plate out completely for a short test drive? Just to see if its the plate or something else. Easy on the throttle!



-Jay

 

[Got Smoke?]

Well I will leave it up to you experts then. I am just an idiot.

TrqMonster, I never said you were a idiot, and if I offended you I appologize.



I was merely pointing out something I said, but did not specify on in a previous post.

 

[TravisG]

Mark, pull that plate out and give her a quick test drive, or do the governor lever adjustment. What kind of boost #'s did you see on the dyno? Jim anytime you wanna tinker w/ my truck. I will be right down.

 

[Got Smoke?]

Mark, pull that plate out and give her a quick test drive, or do the governor lever adjustment. What kind of boost #'s did you see on the dyno? Jim anytime you wanna tinker w/ my truck. I will be right down.

Now see I never had a governor lever prob with my old truck and the plates that were in it were back and forth between centered and full fwd!



As for Boost #'s I couldn't tell ya, I let David drive it..... I have complete faith in him..... and he usually get's the best #'s! :-laf

 

[Turbo Thom]

You can bet one thing, David got out whatever the truck had in it. Just because you installed 370's , don't look for a ton of power out of them. Stock power from the 96 is around 185-190 HP. Other things are needed for power output. Rather than moving the plate, remove it. And as far as Jeff timing the engine, Jeff makes power, but each thing you do to your truck will need a little different timing. You don't have a one size fits all, here.



My truck with the 370's, 3K spring, set pump, and #10 plate made 405 HP on Davids dyno. I also have the AFE and 4" exhaust. The dyno is at the shop now. Take a break and come down. Let Jeff look at the truck and get the 450 HP out of it. I can tell you the first thing he'll do is take the plate out and work on it.



Take the plate out and try it.



. . Preston. .

 

[bubba_PA]

I had the same problem. Dynoed barely above stock when I had a #6 forward, 3K springs, and timing at 16. Should have been closer to 230's +, but was 190. Ended up it was the overflow valve. At least this is a cheap fix/check. Just a thought.



Paul

 

[MCummings]

Make sure your AFC is working.



I had a truck come in the other day that was a DOG! Popped a #10 in it,, and it was STILL a DOG. Loosened up the AFC,, Still a DOG. Pulled the AFC completely out of the pump, and was tearing the tires loose.



Try removing the AFC arm out of your pump, and see what's up.



Merrick

 

[Bloomy]

JAmos,



With the 175hp pump in 95's w/ manuals you have 131 DV's. They don't flow enough to addequately fuel 370's. I put the DV's in before I did the injectors and they work awesome. You can see my sig. I ran 382hp with completely stock air. When you add the appropriate air the 370's will be that much more impressive.



Thomas

 

[Got Smoke?]

Try removing the AFC arm out of your pump, and see what's up.



Merrick

You mean the rack-stop Merrick? Its been gone since day 2!

 

[DavidTD]

Mark,



Sorry we didn't get the number you were looking for. I don't remember the exact boost numbers but I don't recall anyones being really low.



The lean conditon out of the pipe is telling me boost is not the problem. As a matter of fact, it looked just like my 24v up there that puts out about the same power.



I'd check the overflow as mentioned and also the fuel filter if it has not been changed recently. I'd also check for full throttle.



I've been getting some request for another shop day, maybe some of you KYDTR folks would like to make a trip down?