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The RVer's Open Forum / GENERAL RV DISCUSSIONS / Gasoline Engine Exhaust Brake Retarder

Winston Ruddick
User ID: 1028194
Jan 16th 9:23 AM
Does anyone in the United States or Canada make an Exhaust Brake Retarder for Gasoline Engines?
cad_man
User ID: 1014104
Jan 16th 9:44 AM
Decelomatic Corp. "Mountain Tamer" exhaust brake. I checked and what ever WEB sites they had do not work anymore, the company is out of Phoenix. From all the searching I did through Google, it would appear they may be out of business.

cad_man
Mike
Administrator
Jan 16th 12:01 PM
Decelomatic Corporation
Louis King, Owner
4837 E. Indian School Rd.
Phoenix, AZ 85018
(602) 956-8200

I just talked to Mr. King and, yes, he's still in business. He just doesn't have a website anymore.


Mike

cad_man
User ID: 9572103
Jan 17th 8:59 PM
Mike, thanks for clearing up the information I gave.

cad_man
Speedy
User ID: 0415304
Jan 19th 10:14 PM
Is there any information on how well the exhaust brake retarder for gas engines work and how durable they are?
Robert and Linette
User ID: 9056633
Jan 26th 12:04 AM
Hi All,
I researched this quite thoroughly a couple of years ago. To my knowledge, Decelomatic is the only commercial exhaust brake available for gasoline engines. The advertising literature from Decelomatic is full of glowing testamonials, which I have no reason to believe aren't factual, but independantly, I wasn't able to find anyone who actually had one installed. It's fairly pricey, but the design looks good. I decided against it, mainly because I had just installed a Banks 3" exhaust system on my '92 Ford 460. Decelomatic only makes a 2 1/2" model, so I would have had to reduce my pipe size down to that, or install 2 units, adding to the cost. I also had some concerns about using it with fuel injection, but Mr. King says his system works well with carburated or FI systems.
To make a long story short, I've done a lot of modifications to my rig. I'm running aftermarket programmable fuel injection, a custom transmission controller of my own design, and a US Gear overdrive unit. I built my own exhaust brake system. I use the air operated valve from BD Engine brake and a controller of my own design. When descending a grade, I first lock the torque converter clutch, shut the fuel injectors off, close the Idle Air Control valve for maximum engine braking, and increase the line pressure in the transmission. If that is not sufficent, I apply the exhaust brake. I can modulate the exhaust pressure from 0 to max cut out at 30 PSI, but usually run it about 25 PSI. This is to make sure the exhaust valves aren't forced open by the back pressure. I've been running it for 2 yrs now, my rig usually weighs in at about 16500lbs. and I can go down a 6% grade in 3'd gear at no more than 2500 RPM and not touch the brakes. An 8% grade will just need an occasional tap.
If the Decelomatic brake works as well as mine does, then I'd highkly recommend having one, but I wouldn't use it without being able to lock the torque converter clutch or increase the line pressure while applied.

Robert
Tyler
User ID: 8966303
Aug 15th 4:29 PM
A Friend and I have been contemplating an exhaust brake design for our trucks. We both have S-10's, mine an '87 and his a '95. We do a lot of travelling in mountainous terrain and also do a lot of wheeling in the hills.

How hard was it to build you exhaust brake system. Financially and time-wise...?
barney
User ID: 1035294
Aug 15th 7:45 PM
Looks to me like a tremendous expense that good sensible driving can take care of. I dont mean to knock anybody as I think Robert has done a fantastic job getting his unit to perform as he wants and apparently is very knowledgeable in electronics and mechanics and has the ability to put the 2 together and make it work but for me to just operate the special items attached to his unit??? and watch the road and traffic. Apparently the unit saves a lot on brakes but with high pressure in the transmission etc I wonder Robert what the wear and tare is on it and the exhaust system? Does the expense saved on the brakes come anyware near the expense of the added equipment especially if I had to pay for the assemble and installation.
barney
DICK B
User ID: 1363014
Dec 10th 11:29 PM
I HAVE AN 1986 EXECUTIVE MOTORHOME----WEIGHT ABOUT 16500 LB-------I HAVE HAD A DECELOMATIC ON IT FOR MANY YEARS AND I LOVE IT------I HAVE 148,000 MILES ON THIS COACH NOW AND THE BRAKE WORKES FINE----I LIVE IN COLORADO---WE HAVE MOUNTAIN PASSES AND I SELDOM NEED TO APPLY THE SERVICE BRAKES--------I JUST BOUGHT A 1989 EXECUTIVE ,WITH 50,000 MILES ON IT,AND WILL PUT A DECELOMATIC ON IT.-----ONE MUST SERVICE THE BRAKE UNIT, AS LOUIS KING AT DECELOMATIC SAYS TO DO,AND IT WILL WORK CORRECTLY.
doug m.
User ID: 2212414
Sep 20th 1:17 PM
Robert, I am very intersted in getting more information about your modifications.
My email is; dmmitchell@sbcglobal.net