The everyman's 360 LA Eddy headed engine dyno tested
- Thread starter RAMM
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mopowers
Well-Known Member
Any work done to the Performer Manifold? I wonder how it would respond to a Performer RPM.
Intake and a big cam would get you most of the way there and add some head work and more CR probably get you the rest of the way.
RAMM
Well-Known Member
RAMM
Well-Known Member
I just sized the tiny ports to a Felpro 1213 gasket, that's it. J.Rob
67autocross
A new iron curtain drawn across the 49th parallel
My friends 70 Duster makes almost the same power, we have driven it to the track with 3:55 gears and a 3000 stall and ran 13:20 on small drag radials, full weight car other than a fibreglass hood.
Good to know, I'm using a Howards cam similar to the Comp 270h, Isky 270 mega, with 1.6 rockers and a gasket matched Weiand Action, likely a Street Demon, ported EQ heads all else about the same (cubes, CR, etc).3300 lb A100 van w/3.73 gear, still need to settle on TC. Goal is high 12's. Great thread, jacked to get the ball really rolling on my build!
Thank you J. Rob
RAMM
Well-Known Member
You're welcome. J.Rob
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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13.2s are a PW of .080 at a race weight of 3300 that is 3300x .080=264 hp required. if you lost a half second due to chassis set-up, it would be .089, and .089x3300 =294 hp
Just saying
At 400 hp, that is 400/3300= .121 pw, and should go 11.6 with unlimited chassis. Add a half second for street chassis and you get 12.1seconds
But ET is deceptive; a better yardstick for power is the trap speed.
At 3300 pounds;400 hp should go 115 mph,294 should go 103,and 264 should go 99.
Don't feel too bad; 3.55s is the total wrong gear. You can easily trap in second gear with that. 101=6550 with 28" tires and 5% slip. That is not the quick way home. But worse is trapping in third@ 4500,lol.
For a trapspeed of 101, a better gear is 4.88s. These will get you 6200, pretty good Rs for a 268* cam.With slicks,SS springs, and that 3000TC, this will launch like a jack-hammer.
So the big question is; do you recall your buddy's trapspeed?
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RAMM
Well-Known Member
Years ago I had a dyno verified 381hp , 360 that I went 12.5's @ 3500lb F-body @ 108 mph. J.Rob
67autocross
A new iron curtain drawn across the 49th parallel
It's a street car not set up for drag racing, and it runs exactly what I would expect it to.
RAMM
Well-Known Member
First time I use this oil. I am impressed over all but it almost burned out my Makita drill while priming. I gotta wonder if power would have been a little better with a lighter oil. J.Rob
Just remember the Dyno give you CORRECTED HP numbers.....corrected for perfect air.......Now where in the hell in this country does a racer find perfect air...so the actual HP is going to be less in the car....
Also the engine does not run down the track at PEAK HP rpm...it has to launch ,,,rpm has to come up...shift ..the rpm gets dragged down to converter stall or thereabouts...and the rpm must accelerate and shift again...so usually plugging in the peak hp will not give you a correct et or mph....Plugging in the peak hp will give you a Fantasy ET...
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67autocross
A new iron curtain drawn across the 49th parallel
My 344 hp Dyno tested 340 went 12:20 in a Scamp set up for drag racing.....same engine went 13:30 in my 74 Challenger street car. The car set up is a huge factor....
Lustle
Well-Known Member
Or Louisiana. If I ever moved to the states I think those two are on the top of my list.
I figured 425 tq as well. At first I started to think maybe 435. It's got the small duration to make great torque, I really like the IVC on that cam for low end. But then thought maybe that was a little high. I'd rather guess 10 under and be wrong rather than guess 10 over and be wrong. It's a strong engine. And 400 tq at 2500 is no sneeze. It'll cook tires with ease.
Kinda starts making me wonder exactly what my setup is making. I know it was (probably under) rated by the builder at 380 horse, It's got J heads with 2.02 valves/top end valve job, light port work and it's got the XE274H so a step or two up from this cam. But that 380 horse was with 340 HP manifolds. I got headers on it now. And am putting the FItech setup on it. Along with new distributor and such. Should dyno it after that. Curious to see what it puts down.
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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Hey, I got these numbers straight from the Direct Connection Bulletin #40. They were empirically collected and amassed by Chrysler engineers and racing teams in the 60s and early 70s. I don't question their data. Those guys were waaay smarter than me.
yellow rose
Overnight Sensation
Stop using ET to calculate HP.
MPH is HP and ET is HOOK. If an A body makes 400 HP I don't care if it hooks or not, it will run a MPH commensurate with its HP.
67autocross
A new iron curtain drawn across the 49th parallel
I personally wouldn't use et to calculate horsepower..... but everyone I know always asks the same thing.... how much horsepower does it take to run a certain et
yellow rose
Overnight Sensation
You are right, it does take a certain HP to run a certain ET. I just don't use ET to verify HP. I use MPH. Then I look at ET to tell me how well it's hooking.
An example is a car that runs 12.46 at 109.87 MPH. It's making enough power to go low 12's or even dip into the 11's.
Car B runs 12.46 at 104.50. We can say car B is pretty well sorted out. It's ET and MPH match fairly close.
Car C runs 12.46 and 118.23 MPH. We know that pig didn't hook at all, and he needs to work on chassis.
ET and MPh go together but MPH is HP and ET is hook. Too many bracket racers have made HP obsolete in their minds. The best bracket racers pay attention to MPH.
Bring back MODIFIED Eliminator.
Hey! Be Nice! 'Cause when a Mopar guy builds his first pump gas 383 Chevy for a friends 4x4 truck, it just might make 484 LB-FT and 518 HP.
67autocross
A new iron curtain drawn across the 49th parallel
Exactly....I have switched engines between cars and had over a second drop in ET with the same power train. I like this everyman's 360 build because it is what I would tell someone to duplicate if they wanted a nice 12 second-ish street A body...sure one guy might run 11's with it and the next would go low 13's but 400hp is a nice power level for a these cars, just keeps them out of roll bar and wheel tub territory.
RAMM
Well-Known Member
Gee, I wonder who the Mopar guy is that built his first 383 that made 484 tq/518hp? Can ya give me a hint? J.Rob
used to read that bulletin while sitting on the toilet....it gives a power to weight ratio....does not say if the power is peak or an average....so guess on that one....
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