dyno results

Mcktiger74cj5

wnet a day early and came out with 221 hp to the wheels and 300 ft lbs of torque. so what do you all think? :-|

1980_Cj7

I think Fuzz won with 275, and I came in second with 300. Now, what did we win??? Seriously, I thought I was probably high at 300, but didn't want to hurt your feelings, and was hoping for the best for you. I'm sure most engines will come up short of what they are cracked up to be if put on a dyno. But then again, that was to the wheels. What do they figure you lose thru the drivetrain, 20%? So, that would mean you are actually getting 265 at the flywheel. What did the dyno cost you if you don't mind saying? I'd love to have ours dyno'd, but then again, maybe not. Will probably be disappointing.

Dusty

rear wheels those are not bad numbers

Mcktiger74cj5

yea a little disappointed.but good torque numbers. but you can figure a 20 % loss. but from the seat of the pants it feel real good.i got 5 pulles change out the primer metering rods twice and timing twice and the first one. 300.00. and now if i need to go back because of upgrades 150.00. yes you and fuzz wererigt there thanks guy . :t:

Goose

urprising what those real world numbers are.. There are very few 700 hp engines in the dyno cells.. (and those that are 700 hp are danged impressive.)

jeepsr4ever

Mcktiger74cj5 wrote
yea a little disappointed.but good torque numbers. but you can figure a 20 % loss. but from the seat of the pants it feel real good.i got 5 pulles change out the primer metering rods twice and timing twice and the first one. 300.00. and now if i need to go back because of upgrades 150.00. yes you and fuzz wererigt there thanks guy . :t:

You can take a much greater loss than 20%. I would say some timing and carb changes would push you to 250-260 at the rear wheels. What tranny were you running? Fuzz did you ever dyno your engine?

1980_Cj7

MC, have you ever played around with a 401 with TBI? We're getting ready to put a big block Chevy TBI setup on ours, and I'm wondering what effect it will have power wise. I know it will help with the off camber and bumper standing performance, but wondered what it will do to performance in general. Our numbers from Desktop Dyno are 356 HP and 404 Ft. Lbs. of torque. Don't know how accurate that program is. I punched in all our exact specs.

jeepsr4ever

I never got any power out of a TBI personally but I havent done it all :wink:

Rhinolined360

very disappointed.

Soylent_Green

jeepsr4ever wrote
I never got any power out of a TBI personally but I havent done it all :wink:

do I see a fancy billet throttle body in your future?

fuzz401

Fuzz did you ever dyno your engine?

never got around to it

1980_Cj7

Rhinolined360 wrote
very disappointed.

In what, TBI???

mike4089

what is done to your motor?? as far as power upgrades and stuff..i really want to bring mine to the dyno and have it done but im afraid of coming back with very low numbers and being dissapointed....

1tuffcj

me to, i have a 401 with edlebrock heads, comp cam 256 EX harland sharp rocker rollers, edlebrock air gap intake, electric fans, hei,holley 670 truck avenger, ron davis radiator, headman headers, high flow water pump, 140 amp alternator. any ideas, i don't think anyone even has a dyno on this island. i think i'm gonna try and find one, might have to ship to the other island. thanks mikey

jeep_man_401

Our numbers from Desktop Dyno are 356 HP and 404 Ft. Lbs. of torque. Don't know how accurate that program is. I punched in all our exact specs.

I don't think that program is very accurate myself. It was WAY off on the 401 I built and had dynoed. The torque curve wasn't even close to real-world. I even inputted the flow numbers from my head that I had flowed.

As far as the chassis dyno, I had my old 360 ran on one a few years back and it came out to 232hp. I was fully expecting around 300hp...but as the guy running it said he see's very few "street cars" that push his dyno over 300hp.

Back in the early 90's when I street raced the same 360 in a Hornet I was the "one to beat." I smoked a built 454 chevelle that the guy had at least $13,000 into it, and later I smoked the same guy with his 454 powered stepside truck.

It's sometimes not the big hp numbers but the whole combo that makes a vehicle rock!

AMX69PHATTY

My old 343/360 combo chassis dyno'd at 275-285 HP
and that was at 8.x:1 CR and with stock Heads.
Have since added milled ported heads and 1/4 speeds indicate it's now ₃₂₅ HP @ tires.

Goose

Well at the risk of sounding stodgy and old.. this is the kinda surprise that actually teaches.. Like the man said it aint the big numbers on a piece of paper that make the car fast.. It is the combination of parts working together, and the driver.. Just so i can say it again.. Horsepower numbers are really only good for bragging rights.. a 400 hp engine is only making 400 hp if it can get to that point in the rpm range. if it is held below the power band by someone short shifting it or gearing too tall that car will get spanked by a car with less power. It aint just a matter of buying the biggest thingie.. or the trickest whoosits. The numbers you have there are very respectable, and couple that with a well matched car / trans/ gear ratio and it ill be quick. Just for a little mindboggle.. a peterbilt tractor, bobtail (no trailer) wighing 19000 lbs with 3:73 gears and 500 hp 1500 ft lbs torque will run 15 second quarters at sea level. Why? because the transmission is designed to keep that engine in the 500 rpms where it makes the most torque..all the way down the track

jeep_man_401

Right on. Also, with big HP on the track you better have a good way to hook up. Otherwise all that power will go up in tire smoke! Those 454s I raced should have killed me! And they did...off the start. But this was a high RPM freak trying to turn that 454 a ton. I'd pass them about half track and it was taillights after that. :mrgreen:

Goose

Yep.. And for those who only believe in the bigger is better theory.. re-read some of these posts.. MC and some of the guys here banter numbers and theory around like "Ho-hum" everday stuff. the truth is they know thier business .. and thats what it takes to first make power .. then to use it.. Actually, Fuzz's story is a good example.. that CJ is quick.. and it is amazing how quick.. but that same power in a different package would be quicker yet..with the same level of expertise applied to it, And I am sure there are a lot of guys at the track making more power lot's more that wish they could equal Fuzz's times.. :!:

Goose

Oh and I forgot RadAMX.. isn't yours down in the nines.. and streetable??