Dyno day 511 lives again

[DeuceCoupe]

Last time trial today 10.15 @ 132.99 with a 1.43 60.

Wookie,
I have a couple questions, trying to Gonkulate ie Compute your combo.
* Weight of Barney with you in it? (I guessed 3990)
* Sounds like wide open headers, are they the same as the dyno headers or different? Care to share any dimensions?
* Gear ratios in the t727 I think you mentioned wide ratios?
I made a few guesses to match up the engine dyno, now trying to dial the car itself in. I have down that the b-body gained about 150 lb in 1971 vs the lighter 1968-70.

 

[Wookie316]

Car is 4100 with me at the line.
2.74,1.54,1 in the 727
9.5” converter built by Lenny at Ultimate. Type F trans fluid.
4.30 Dana with a 30x10.5 Hoosier Radial slick.
TTI 2 1/8 step header. Same as the dyno.
Open header at track with 18” of pipe after the header.
Hope this helps.

 

[Challenger340]

REALLY NICE Engine you built yourself ! Excellent BUILD and moving that B very well !

Very reliable combination.
Kinda reminds me of one I originally built back in the mid 90's for a guy up around your CASTROL way ?
"Ol faithful" as I later dubbed it.... slammed the hides up around your Castrol area from back in the mid 90's when I first built it, right on forward to the last time I refreshened seen here back in 2010 before going to Mats Vegas ?



specs:
4.500" Bore
4.25" Stroke
13.5:1 JE Slugs
INDY "SR" Heads, fully ported to MW by me
INDY 440-2 Intake / Ported
1050 Holley #8896
Comp Cams .690"/.690", 289 @ .050, 108 lsa (very easy on parts)
CRANE GOLD Rockers(see Cam above)

Ain't seen it lately, I think Cliff kind of retired from Racing after Ken passed ? I had built one(493) for Ken's yellow Duster as well.

 

[Wookie316]

THAT sounds great man. Thanks for sharing.

 

[DeuceCoupe]

OK thanks for the added info (I found the 18" extension in one of the many great YouTube's anyway!)
I wanted to Gonkulate your car to get a handle on Rear Wheel Horsepower (RWHP) for this type combo for Brewzer's thread.
Here is what the Gonkulator gets - the 60ft is just tuned to what you got, I don't think any computer can magically match a 60ft, depends on too many things.
1.42
4.15
6.45 at 106.0
10.14 at 133.3

SAE Gross (like the engine dyno, these are computed but pretty close)
Torq 753 at 4900
Powr 836 at 6800

SAE Net (the way engines are rated today - Net was WAY less than gross back in the 60s-70s)
Torq 721 at 4800
Powr 779 at 6700
Net figures used to be WAY less than gross, but in a car with cold air and open header, they come in much closer.

RWHP (with NO inertia)
Torq 624 at 4700
Powr 666 at 6600
Inertia losses on the chassis dyno could cut those numbers down 40-80 units depending on the type of chassis dyno but not much more than that.

I think the most expensive Holley I ever bought cost me $50, so Barney is a little out of my range, but an awesome car and an awesome thread.

 

[Wookie316]

I do run a P/S Pump for the rack and hydroboost. Not sure how much power that bleeds?
Electric W/P.
This photo is from the same weekend I ran the 10.14. I went to final 3 that day. Lost due to a bit of a nap at the light. Not much, but when you get that deep in rounds the competition is solid.