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#61
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Maybe we should Post Up the number of hours that the people have been on a dyno in their lifetime and what they learned. A good dyno will have calibrations checked often and will repeat thru out the whole testing sequence.
I will start a different thread. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#62
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Then back it up at the track, the only true dyno is weight, MPH and ET. No games can be played there. |
#63
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You can not kill the low end grunt of a 455 if you tried to. They have a lot of "suck" to them. Essentially the same reason you can run a bigger carb and not drown the engine out vs other brands. |
#64
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Nice thing about a dyno is if you have the proper sensors, you get very good information.
Be it EGTs sensors or wide band NTK sensors, so thread in race forum. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#65
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Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#66
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Stan knows a LOT about how to take the dyno data and the corrections there AND the track data and then making the corrections there for the true comparison.
Offering Performance Software Since 1987 That is a very long time. The Technicians used to take the data 4 times a day with the time in-between used for Dyno Inspection, Engine Fluid checks, Identifying sensors that needed to be replaced and replacing them, and filling out this info in "Log Sheets". The log sheets would also go to the Dyno Supervisor and the Specific Program Engineer. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#67
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#68
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#69
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I've said it before, it's not that difficult at a glance and some quick math to see if a dyno sheet has some excessive correction and/or fudge factor going on, as long as they provide BSFC and LBS per Hour, which is all measured.
In fact there was a sheet posted on the forum here that was in question a while back where someone dyno'd out on the East coast, I think Connecticut or something like that, and it was November. So we are talking sea level conditions and cold weather to start with. Yet the sheet for some reason had something like a 7% correction factor. ????? I agree to some degree that the track is a great place but the issue with that many times, especially with a street car, is that the car itself is very seldom optimized to take advantage of the new power plant. Whether that be a 500hp engine, 600 or even 700hp. Everyone on the forum wants a tight converter, everyone wants 3.08 gears, everyone wants a quiet 2 1/2" exhaust system. You just aren't going to see the full potential of the car that way. To make matters worse, we all deal with different DA conditions around the country and many don't like to use correction factors and they don't know the weight of the vehicle either, which is absolutely essential when comparing track times. I love it when someone brags about how quick they are with minimal parts and we eventually find out it's in a 3000 lbs. car, LOL Without that data, it's almost pointless. At least with a dyno sheet that has the BSFC and LBS. per Hour fuel data points, we know what we are dealing with. |
#70
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[QUOTE=242177P;
]LOL. Tom and his Measuring Stick. That is some funny chit there, totally expected 242177P,6362601 Made me laugh. Thanks again. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#71
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#72
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Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#73
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Isn't Humbolt County CA near Sac? My wifes side of the family is from Sac and still have family up there in Rio Linda and Chico. Been a long time since I've dealt with anything in the area though (1990's?) I don't recall any good places to go unfortunately.
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#74
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He is trying to retire and not taking on very many jobs. Maybe some longtime customers, there were a few sick engines in his shop. He has this big CNC machine that does all the boring, decking, line boring, stuff like that in his shop. IA2 blocks are in his CAD files even though he has never done one. I asked if he would do mine,nope. But he will balance the rotating assembly. I need to get down there and have that done. Mike has done RAV heads though. Has a flowbench but has not ported heads in awhile or flowed any. That shop is jammed full of spotless, new equipment. Everything you can think of. VERY interesting guy to talk to. He was a record setting professional driver for years. Knows everyone, and I mean all the top racer crowd. I was there for a few hours and got him talking. Old race stories from Freemont. He was pals with guys like Bruce Crower, Vic Edelbrock, Arias. He knew exactly who John Marcella was and thought highly of him. He does have a dyno, but its never had a Pontiac on it. I would have to fabricate something to support the front of the engine. And its a conservative dyno. He said engines on it run 40-60 HP less than Westech. Seems like a lot, he might have been half joking but its not a happy dyno. |
#75
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If I ever did decide to drive even to Sacramento and do it I might as well drive down I 5 to Westech and have it done. Lots of Pontiacs have been on their dyno and they have plenty of carbs and tuning expertise. |
#76
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I drive down to Paul's for machine work and the dyno and he's about 3- 3 1/2 hours from me in Tuscon. Not terrible, usually a day trip to drop off/pick up parts, but the dyno requires being there 2 days |
#77
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So with time lost from work, 800$ dyno fees, gas, motel and food ect I think it would be about 2K to get it all done. I could do it but right now concentrating on a piece of property where I could have my own shop so the money is better spent there for the time being. Nothing is set in stone right now but I think we can make it all work out. |
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