Dyno?
Thread Starter
Instructor
Joined: Mar 2002
Posts: 138
Likes: 0
From: acton ma
Dyno?
I am going to have my 383(800 miles) dynoed mon.I am running a 650 demon and am looking to have it fine tuned.This is my first time on a dyno, any sugestions?(I was told by the engine rebuild shop it should be around450/450?)My current set up is brodix m2 track1 215cc cnc heads/comp cam 230in/236ex duration-1.6 rockers,110 angle/brodixhv1016 dual plane intake/tpis headers :eek: /punched cat/power effects exhaust/10.25:1 comp/mach 1 reduction pulleys/breathless smog pump eliminator/evans cooling system/My current cab set up is 74 primary/78 secondary/6.5 power valve/36 deg total advanced.I would appreciate any sugestions or recomendations thanks for the help. I'll try to post mon night my results. :chevy
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Dyno? (nopain1984)
Is it run up in 1st gear or all 4 gears?
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Racer
Joined: Jun 2002
Posts: 411
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From: Palm City FL
Re: Dyno? (scorp508)
I know when we want to put some numbers on the dyno with our bikes,
we add about 10 pounds of air to the rear tire. This makes the tire roll easier on the drum, tricking the dyno to show a few more horse.
At the very least, check your tire pressure.
One time I saw a drag bike on
the dyno with a slick. It had maybe 15lbs in the tire. The soft tire kinda
"folded over" the drum and superheated the tire causing it to disintegrate.
we add about 10 pounds of air to the rear tire. This makes the tire roll easier on the drum, tricking the dyno to show a few more horse.
At the very least, check your tire pressure.
One time I saw a drag bike on
the dyno with a slick. It had maybe 15lbs in the tire. The soft tire kinda
"folded over" the drum and superheated the tire causing it to disintegrate.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
I have a 700r4. :chevy
So if you nail the gas at say 49mph and it shifts to 2nd you have to try it again at 50. If you nail it at 50 and it stays in 3rd and does a clean pull then use 50. Make sense?
I'd run your tires at whatever your street pressure is to make it the most like you'll always drive it.
Thread Starter
Instructor
Joined: Mar 2002
Posts: 138
Likes: 0
From: acton ma
Re: (nopain1984)
Fuel pressure was low at upper rpm's :mad I guess i need to get another new fuel pump :mad My existing pump is a 1985 delco(new 500 miles).They recomended a 2800 stall converter/fuel pump and back to the dyno!Rear wheel results were 282.4 hp 287.9 torque :cry Hopefully the pump will help :chevy