Ron:Ron Golden wrote:Mike,
What dyno do you have at BLP?
Ron
An old Stuska/Depac with controls that we built in the '70's. We have two engines (540 BB and 358 SB-2) that we use for carb-testing. There may be an inertia dyno in our future though!
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Mike, R&D of my own engine & run in & tune of customers engines. I need to be able to pick up changes of 1 or 2 HP when doing R&D also changes in acc rate with pipe & carb changes etc. I think controlled engine intake air is a must for this type of R&D even with the C/F . what do you guys have for this do you run a fan with a duct sealed to the carbs??Mike Laws wrote:What is your primary purpose for the dyno? (R&D, durability, run-in, etc...)RC Performance Engines wrote:Im looking at buying an engine dyno, I want to know what you guys think is the best bang for buck & why. Im in favor of the DTS at the moment.
Thanks
RC:RC Performance Engines wrote:Mike, R&D of my own engine & run in & tune of customers engines. I need to be able to pick up changes of 1 or 2 HP when doing R&D also changes in acc rate with pipe & carb changes etc. I think controlled engine intake air is a must for this type of R&D even with the C/F . what do you guys have for this do you run a fan with a duct sealed to the carbs??
Doug Schriefer wrote:Most of the machines mentioned here will do what you want. Everyone will have their own preferences between Superflow, DTS, & Stuska, and they each have their own Pros & Cons.
Software wise Superflows are probably the easiest to use. Stuska with a Depac are probably the easiest to adapt new software into. DTS has really good customer service. Superflows have had issues with computer boards in the past, but have gotten much better. Everyone will tell you how much FUN it is to deal with Depac Dave. DTS can be a pain with radio noise, and trying to hook up other branded items (WBO2, Blow by meters, etc.)
A couple of things to keep in mind:
1) Most people have problems with repeatability due to the way they run the dyno, or the way they have their room setup. Take your time with your setup, and visit other dyno shops and see what you like and don't like about their setups.
2) If you trade work, or share information with other shops that have a dyno having the same type of equipment can help comparing easier.
3) Whatever you do get a docking station cart system, and spend time in advance on the design and setup of your connections. This will make change over much simplier... If you have an R&D engine, you can keep it on a cart, but change over to install a customers engine and be running in 30 minutes or so...
Best of luck...
RC:RC Performance Engines wrote:Mike,
Is the engine intake air duct @ a specific pressure?? what size duct and if a fan is used what CFM
Mike Laws wrote:RC:RC Performance Engines wrote:Mike,
Is the engine intake air duct @ a specific pressure?? what size duct and if a fan is used what CFM
The intake air system is not (directly) pressurizing the carb. There is a supply room (air conditioned room approximately 8000 CF) with a fan that circulates the air through a 16" duct that loops over the cell and dumps back into the supply room. Directly over the carb is a 12" drop down duct that connects the 16" main loop to the carb. This provides an adequate volume of air w/o appreciable pressure to the carb. (Technically there is a slight amount of positive pressure in the entire system, but as long as the A/C system keeps the supply room filled, this pressure remains stable enough for consistent testing.)
These are the engines I will be doing R&D on how do you know how much to adjust the speed of the pump for hi speed sweeps?RW TECH wrote:This is something that also helps DTS dynos, especially if you're trying to run over 8500 RPM with engines that produce less than about 550 ft. lbs. torque.Bad95Gts wrote:Stuska Changes there pump motor speed and uses no valves in there load controller.
The shop I dyno my work in added a rheostat controller to the pump. It's mounted above the console for easy access and it seems to work well.RC Performance Engines wrote:These are the engines I will be doing R&D on how do you know how much to adjust the speed of the pump for hi speed sweeps?RW TECH wrote:This is something that also helps DTS dynos, especially if you're trying to run over 8500 RPM with engines that produce less than about 550 ft. lbs. torque.Bad95Gts wrote:Stuska Changes there pump motor speed and uses no valves in there load controller.