1986 Big Block Chevy on the Dyno Tuning the Carb 450hp

I built a 450hp motor (approx) and decided to have the carb tuned at Baker Engineering's dynomometer. They do the tuning for you so I thought I'd give 'em a try.

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[restorethat454]

wat tranny r u runnin and wat rpms u doin at 65mph

[supercarbuilder]

@restorethat454 TH400 trans, i'm not sure of the speed, it hasn't seen the open road in years.

[mikezanellato]

Damn nice chevy. What gearing do u put in it with those tires. 44s?

[supercarbuilder]

@mikezanellato The tires are 39.5's and I still have 4:11 gears, I'd like to go with 5:13. I just do everything in low range and it does great.

[chevyguy262]

what size engine is it?

[supercarbuilder]

@chevyguy262 454ci

[supercarbuilder]

Then about 425-450bhp, now with further tuning and a new carb about 450-475bhp.

[supercarbuilder]

@03sto But most of all, the dyno can't tune for driveability. This is off the line response and high load situations like starting in the mud or sand with big tires. You can't set the timing curve without being under load. For example, we tuned the whole carb and got our peek numbers that day and we couldn't drive the truck up on the trailer because the low-end power was so far off the timing curve that it would back fire on a lean condition. $250 later I did it myself, ended up with 40hp more.

[schamberlin5150]

Ahhh That dyno looks all to Familiar. Had Baker Tune my 1978 GMC on 40's and 3.73's. Did 550 rwhp and 540 rwtq. I'll post up the video of that today

[restorethat454]

@restorethat454 cause i have a 454 big block its in my mud truck it's got comp 650 lift cam worked 70 corvette heads and fully forged bottom end edelbrock single plane and a holley 750 double pumper just looking for some tuning tips to get the peak power all the way through

[supercarbuilder]

@Fordpower25 Thanks! and thanks for the sub.

[Fordpower25]

thats a beautiful truck