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+--- Thread: Dyno'd the 77 today! (/thread-3268.html)
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Dyno'd the 77 today! - blazinchuck - 10-27-2012
after some aggravation with the steering column, decided to ride out to my buddy's shop. they wanted to put the bronco on the chassis dyno...so i said ok
she put down 210hp/245tq...i was hoping for more, but thats still not bad,
anyway to figure out what my loss is going thru a nv3550,d20,9"(4.56) and 33" tires? so i can kinda put a number on the motor.
they printed out my run, but my scanner is down.
fuel pressure held 42, and the wideband showed my running a touch rich...i think 12.8
![[Image: photobucket-3245-1351391151161.jpg]](http://i233.photobucket.com/albums/ee198/carolinabroncos/photobucket-3245-1351391151161.jpg)
Dyno'd the 77 today! - SC74 - 10-28-2012
Hell yea Chuck. What do you think motor only is?
Dyno'd the 77 today! - chuzie - 10-28-2012
Chuckles and I went back and forth on that last night. Typically looking at 15% loss from crank back for street cars with manual. Fellas on classic range from 20 to 28%. I would venture to say 24% is a fairly decent estimate for chuck since he does not have crazy tires or anything. So with 210 @ wheels we might estimate 260 HP @ crank. I know he was hoping for more though with the bore, came, etc. Could be simple mods though.
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Dyno'd the 77 today! - SC74 - 10-28-2012
What do you think a stock 5.0 would be - at crank and at rear wheel?
Dyno'd the 77 today! - broncosbybart - 10-28-2012
My guess on the stock 5.0 is about 200??
That is really cool chuck!!
Dyno'd the 77 today! - chuzie - 10-28-2012
Actually the stock 5.0HO (MAF + 60mm TB 1989-1992) was 225HP (FWHP) @ 4,000 RPM which was beaten by the Cobra variant in '93 with 235HP (according to the government) but it was really more like 265HP.
Dyno'd the 77 today! - blazinchuck - 10-29-2012
im not digging the power curve tho...it should 1500-2000 lower for rock crawling...oh well guess i got a mud rig now lol
Dyno'd the 77 today! - chuzie - 10-29-2012
I wish there was an app so we could dual post between forums with one click.
Dyno'd the 77 today! - blazinchuck - 03-04-2013
as soon as i can finish the steering column, cruise control, ac/heater...my boy shawn got me a chip/flip switch/data cable...so i need to get up to his shop so they can write a custom tune for the 77. might net a few more ponies!!
Dyno'd the 77 today! - blazinchuck - 03-14-2013
Thought id bring this back up. Dynoed the 77 again last night. I fixed a leaking brake booster and got the 65mm throttle body/70maf now. My buddy got me a chip/switch/data cable. So base run was 213/246. Found fuel too learn now- so he tweaked it up a couple times, then on 3rd run added 2° of timing.I'll post pic of the computer screen. The last row of numbers were a comparison to my buddies stang. Guy told me I can easily run 87 now or anything. I was worried bout that and have been running mid grade since installing the 306. He also added another tune for a9l...since I'm using a a9p now. So if eec crashes I can use either and still have the tune. Ended up with 242/275 at the tires! Not bad at all. And just for kicks... I brought a pair of my f150 tires/wheels(235/75/15) another run show only 6hp/11tq increase.
Now what's interesting my buddy's stang has gt40heads/intake/tf stage 1 cam(same as me) and shorty headers.
I have same intake/tf alum heads, same cam, more compression w/dome pistons. His before and after 240/289...260/306 with a 5sp.
So I'm sure my motor is making more power...but I'm losing a good bit thru 9",d20,nv3550... so hope this sheds some light on things.
Getting a tune if very good!!! I could have hurt my motor running as lean as I was I think.
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