Chassis Dyno Tune Advice

[65 Fastback]

Hi there,

Im taking my 72 C10 in for my first chassis dyno tune after installing a rebuilt 400SBC engine. Is there anything specific I need to ask the Tuner or if he's worth his salt he will know what needs to be done. My understanding is he would make various adjustments to achieve the best power curve i.e. distributor advance springs, carb jetting, air/fuel ratios...Its for street driving only, maybe a 1/4 mile one day...

Cheers
Mike







1972 SWB Cheyenne, Dart SHP 400 Block, Forged SRP pistons, Forged Crankshaft, 6" H Beam Rods, Howards Roller Cam 180265-10, AFR 195 Heads 75cc, Comp Cams Roller Rockers, Edelbrock 750 Carb, 1 3/4" Headers, Turbo 400 Trans, 3000 Stall, 3.72 12 Bolt, 8365 MSD Pro Billet Distributor

[Fitz]

Originally Posted by 65 Fastback

Hi there,

Im taking my 72 C10 in for my first chassis dyno tune after installing a rebuilt 400SBC engine. Is there anything specific I need to ask the Tuner or if he's worth his salt he will know what needs to be done. My understanding is he would make various adjustments to achieve the best power curve i.e. distributor advance springs, carb jetting, air/fuel ratios...Its for street driving only, maybe a 1/4 mile one day...

Cheers
Mike

Mike:
Most of the dyno guys here in southern Arizona only understand computer controlled fuel injected engines. Just ask if they can tune a carbureted engine. If the give you a blank look or turn on the BS go elsewhere. If they tell you to bring a jet kit for your carb to the session you've found the right guy!

[LockDoc]

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I can't help with the tune but I want a PB/J sandwich too.... Maybe she will share???..

LockDoc

[mike16]

dyno time is expensive, You dont want to stand around like a bunch of muppets while the meter is running. There are a few publications out there by HPBooks or SA. The subject is about running engines on a Dyno. I would buy them and read then thoroghly to get an idea what going on. what to expect and develope a plan.

Also, plug your engines numbes into desk top dyno program ahead of time so you get an idea what your numbers should look like. That way you dont spend time and money wearing out your engine chasing elusive numbers that just are not there.

bring your fly wheel and your own headers as well as the carb kits mentioned by Fitz. Maybe even a couple of spark plud sets in different ranges.

dont wear your motor out on the dyno, and dont stand around dumbfounded. develope a plan and discuse it with the dydo people ahead of time. let them know that you know what you are doing, no bluff there either, you ought to know.

And like Fitz says, at the first hint of cluless BS.... move on.

[trac209]

Tune is truck then when it runs its strongest then try to lay down some numbers. Like said above why waste Dyno time trying to start from scratch ?

[GASoline71]

Not to sound harsh... but for a street cruiser/daily driver that hits the quarter once in a blue moon, a chassis dyno is a waste of time and money.

But if you must... listen to the advice given.

Gary