Hey guys I work for a fire dept and we have a 88 pierce fire truck with a 6v92 detroit in it. I was wondering how to turn the fuel up on the truck or find info on how to do it. Thanks

Brain box? DDEC? If it is, it will have a box on the top of the engine. That, we will need to know before you can start playing. And whats going to happen when it gets taken in, and they find out. That "SOMEONE" has been doing non cert'd mods to the engine? I'd leave it. No fire is that important to get to...my .02

Brain box? DDEC?

6V92's are 2 strokes, and purely mechanical.

Don't turn the fuel up, makes no sense in that application. You need a stone reliable motor, even if it takes a minute or two longer. I'd rather have a fire truck arrive a couple minutes later, than a fire truck burn up the motor and never make it.

there's lots and lots of 2 stroke DDEC engines running around. the electronic unit injector was brought into the 2 strokes in the 80s - early 80s sometime. DDEC 1 I can find out the exact year tommorrow. too tired to look it up now.

I have to agree with kas83 on this one . .. A fire truck is not the place to be doing things that may possibly reduce reliability. If that engine goes BANG it could mean someone's life . . .not worth the chance. [nonono] [duhhh] [duhhh]

After hearing about the stress test they put on the engine/pumps before they are shipped, any performance increases may cause problems. They have to run at full pump load for hours, who's gonna watch the gauges?

yup about '85 DDEC 1 on 92s came out. '87 series 60 introduced with DDEC 1 quickly upgraded to DDEC 2 in '88 or '89 and the '92s went out of production for road use in the mid '90s. so theres plenty of electronic 2 strokes on the road.

agreed on the nono [nonono] of actually turning up a fire truck that's in service.

6V92's are 2 strokes, and purely mechanical.

Don't turn the fuel up, makes no sense in that application. You need a stone reliable motor, even if it takes a minute or two longer. I'd rather have a fire truck arrive a couple minutes later, than a fire truck burn up the motor and never make it.Yes they are 2 strokes. And yes there are DDEC 1 2and 3 ecm controled 2 strokes. Worked on them abit........:cool:

there's lots and lots of 2 stroke DDEC engines running around. the electronic unit injector was brought into the 2 strokes in the 80s - early 80s sometime. DDEC 1 I can find out the exact year tommorrow. too tired to look it up now.Thank You Sir......

6v92. DDEC. from this afternoon.

http://i144.photobucket.com/albums/r193/demon_044/IMG00365-20090813-1222.jpg

Oh you poor man.....Its a BUS!!!! I hate working on them with a fore and aft 8v that you have to take the rear seat out of, just to remove the air piping...Lotta fun to do an inframe with a Series 60.

..............tell me about it [laugh] no really work is work. I dont mind busses. we get tons of transit and MCI, prevost, greyhounds, setra............oh my. we got the contract to repower 50 transit with series 50s too. we usually pull the skid. if its in for major work anyways. as the allison usually gets a work over too.


funny though. I took this other transit on a road test 1/2 hour before I had to leave work today............yup dead in the water 3/4 way through. [yuk] good times.

Last one I did was a 60 EGR that needed a turbo changed out...NO!!! I'm 6foot and 240.. WE DON'T FIT!!!!!!!!!! Grab the lil guy and shove his edit in there!!! Just found a new use for shop dwarfs!! OH YEA!!!

The mechanicals had an orifice in the return line(not sure if the DDEC units do) dill it out a bit larger.

that was a trick up to DDEC III/IV S60. often doing that was a cause of other drivablity issues or injector problems though.

^^^^^x2

The ACERT Cat motors have an off-road/emergency vehicle setting that cranks the power to max and lifts the governors. The shop won't flip that switch for me though, they say it is illegal. I don't know the hours or miles on it, but the age is enough that I wouldn't bother with it.

The ACERT Cat motors have an off-road/emergency vehicle setting that cranks the power to max and lifts the governors. The shop won't flip that switch for me though, they say it is illegal. I don't know the hours or miles on it, but the age is enough that I wouldn't bother with it.?????No Sir. Its like all ECM controlled engines. It down grades the HP. Its called LIMP HOME mode.The only GOVERNORS on a C-15 are in the ECM. Nothing gets lifted.Your "SHOP" is not telling you the truth...To better explain. Even with cars. Something goes bad. The ECM goes into a LIMP HOME mode. That means it keep the most simple functions, so that you can get help with what is wrong with the vehicle. Its runs on the very basic functions...There is no "SWITCH".. Hope that helps....

The ACERT Cat motors have an off-road/emergency vehicle setting that cranks the power to max and lifts the governors. The shop won't flip that switch for me though, they say it is illegal. I don't know the hours or miles on it, but the age is enough that I wouldn't bother with it.


Actually it is an ecm running change. A complete rewrite of all the operational software. They won't ever consider doing it for an on road truck.

The C-12 cat in the ladder truck I am assigned to is 510hp at 2100 rpm. The engine is governed to 2300. My eyes almost popped out of my head when I first drove it.

OK, so they won't change that parameter when they have the computer hooked up. That better?

The mechanic that told me about it said that at the last company he was at they did it just to see what it would do. And turned it right back down. It was scary.

I don't know what the actual displacement is on a C-12, but I know Detroit would rate the 12.7 up to 500 HP before the 03 emissions hit. Yet this C-15 is only at 475. What a waste of displacement. I would like to know what the 14L Detroit was actually good for pre-emissions.

The setting is for off-road and emergency vehicles, not the limp-home mode.

Actually it is an ecm running change. A complete rewrite of all the operational software. They won't ever consider doing it for an on road truck.

The C-12 cat in the ladder truck I am assigned to is 510hp at 2100 rpm. The engine is governed to 2300. My eyes almost popped out of my head when I first drove it.510 on a C12..Wow. The offshore C12 was ALOT higher. But still. You and I both have changed more than our fair share of HG's on them as well as fubared cam/cam follower and chewed up blocks...

I don't know what the actual displacement is on a C-12, but I know Detroit would rate the 12.7 up to 500 HP before the 03 emissions hit. Yet this C-15 is only at 475. What a waste of displacement. I would like to know what the 14L Detroit was actually good for pre-emissions.


this pete is an 1100hp pre '04 emmissions Series 60. Now I know I said it was 800 the one time I put it up before. but I was mistaken on the 800 horse truck. thats an entirely different tractor. this Pete is 1100hp fuel only. the rig is licensed for 121,000 lbs. I didn't tune it, but one of our former shop foreman did.

http://i144.photobucket.com/albums/r193/demon_044/Jetboygraveltruck.jpg

might have alotta pony's but its the most Ugly truck Ive ever seen.

your kidding right? its a dump truck......... what do you expect.


besides the question was about power from a 60 not how pretty the package is.

um,, no not kidding, Just saying,,
I understand what the question was not arguing that it is impressive[duhhh]
and anyone that works in these engines or any others, for that matter Understand that In anything but a truck, Ie marine Industrial,etc knows that these engines in trucks are limited by the actual usable horspower they can make by the amount of actual cooling they have, you put that engine in a evironment that has endless optimum cooling and It can make even More horsepower like the c-16 625 horse cat, in say a marine app, nothing is actually done to the engine to make more power than simply the ecm software (and the obvious marine package ((manifolds turbo cooling etc))
and ther output is from 625 to 1400hp because there cooling is able to keep it at a constant temp wheras a truck cannot,

now if we could just figure out how to make trucks have better cooling like that and be Actually Functional.lol think of the power these things could have!!

at one time I had built a 6v92 that was rated stock at 350 hp, when we were done with it it was running over 630 hp it was in a truck at the time, but that was as much as we could get usable cause we just couldnt keep it cool at anything more than that, and even then it was a challenge man what a power house little buggar that was I loved that truck.

Many years ago I had seen a 1/2 ton step side Chevy truck that had a 6v Detroit in it. I am not sure what model engine it was. He was at Lebanon valley drag way in Lebanon N.Y. He was turning out 9.5 seconds in the 1/4. It blew everyone's mind how fast it was.

510 on a C12..Wow. The offshore C12 was ALOT higher. But still. You and I both have changed more than our fair share of HG's on them as well as fubared cam/cam follower and chewed up blocks...



LOL, they were hungry for cams that's for sure.

Thats no kidding.....

These C-15s we are running are hungry for VVA (variable valve-timing actuators). They eat them up about every year and a half.

yup your not alone there, these c15's we have are doing the same thing..

I'll third that comment..

The original question. If the 6v92 is manual fueled, bigger injectors, timing can be adjusted to some extent with the injector setting. Back them out it smokes more and so on. If it is a calif truck the cam timing can be advanced 5 deg to get it up with the fed specs. That gains 20 hp. To get serious it needs the intercooler if not equipped. The liners can be replaced with export liners that have .100 higher ports. This listed will make it tear up a 350 cummiins on a hill.

Don't open up the fuel returns as was suggested it will only lower the fuel pressure at the injectors, smaller would do more but for more steady fuel, use a 12v71 fuel pump and use a return jet from each head with two return lines back to the tanks, cooler in the summner and hotter in the winter.

Make sure the fuel lines before the pump are good, they can bleed air in the system dramatically losing power. In this condition they will not leak fuel, just air in and was a common plague with the detroits.