~600hp street 545

Dynoed at 463hp and 495tq at the tires through a C6 and 4.33 gears, full exhaust, air filter in place, running rich. Peak hp was around 5600 tq was around 3800-4200. HUGE area under the curve

.030 over D1 block
AW Brown 4.5" Scat kit, H beams, Probe pistons, ~30cc dish
10.75:1 compression
Out of the box Kaase SCJ heads
Ported Offy Port-O-Sonic
Out of the box Speed Demon 850 DP
Scott J specced mech flat tappet cam, 254/260, .622"/.645" 108LSA
Hooker 1 7/8" Super Comp headers, 31" tubes, 3" collector
3" Dr Gas X pipe
3" Borlas + 3" tails
MSD billet dist, Crane HI6 ignition, 30-32 deg total timing, 20deg initial, in by 3000.

So far it has run 11.59@116 in a 4000+ pound Starsky and Hutch Torino, has also run as fast as 116.89. 1.69 60' times with a 3.56 gear and 28" tall drag radials.
No tuning yet beyond a bigger acc pump squirter to fix a bog..

Runs on pump 93, will idle with a stock Ford Converter, but it doesn't like it, I'm currently running a 3500 stall, much happier..

Jim W

Man that is awsome performance considering it has not yet been fully tweaked.

Let us know if you dyno again with some changes. With that much torque, I hate to think what all you might break if you stuck a pair of slicks on the back of that car. Or if nothing breaks, it would be a cool wheelie.

No wheelspin on the 11.59 run, the DR's hook pretty well, no wheelie with the 3.56 gears and ~4000+ pounds to deal with, maybe that'll change once I get the car tuned fully, but I dunno. All I plan to do is remove the choke horn and lean it out a little this year, maaaaybe mess with the timing.. Sadly, anything more than .1 off my times costs me $500+ for a roll bar..
:-)

I really really really want to figure out how to get a 10.99 out of it now..
(my original goal for this motor was 11.99)

Jim

Sweet car!

I would suggest bigger headers and a bigger carb to go 10.99s. I run an 850 and 2" headers on my 435. Can you borrow a dommy and an adapter from a bud?

Is that Torino Cobra yours on the site yours? I am so lusting over one of those. I would lose the louvers though.

Greg

Thanks Greg. I don't have access to bigger carbs just now.. Maybe I can mooch one at the strip for a test run sometime..

As for the headers, there are two similar cars that have the same headers that have run 10.5 and 11.1 so far (Franks's wagon and Brians '76, both with bigger cams and carbs). The only headers that are bigger are the Crites ones and they are still untested in a performance app (also they are only 2"). I'd have to go custom otherwise..

torinocobra isn't my site, Mike (who runs it) just hosted my videos..

And I have to agree, the 70/71 Cobras are beautiful... Black on black 1970 with a stroker and a stick would be a dream car of mine..

Thanks again,
Jim

bro i mean no offence but not sure you have 600hp does it really matter, after a couple weeks I decided to type this and hope I do not get flamed or offend you at all. I do not believe the 20% or 18% points rule on dynos. I think your c6 takes the same power to turn if you made 400hp or 600hp and dynoing my blown sbf before with a manual and after with a c4 confirmed that belief.

btw I love your car my friend has project big bird underway:)

No offense taken, but you should look at it from several perspectives before making a judgement:

1) Heavier internals in a C6 take hp to spin from say 1500-6500 rpm in the same amount of time, (that's how acceleration based chassis dyno's work, they measure how long it takes to spin a roller of a known weight to a known RPM), that and the fact that the losses due to friction are larger. You can't put a hp # on it, like 50 hp, otherwise a 100hp engine loses half it's power while a 500 hp engine hardly loses any. That plus the 9" rear add up to the losses estimated..

2) My best 1/4 trap speed of 116.9 against my weight (more like 4200 to be honest, it weighed 4400 with iron heads, water pump and all front bumper hardware intact, but much lighter wheels/tires) point to over 500 hp at the rear wheels, (~520). Even if you scoff at 18-20% lost through a C6, this points to ~600 crank hp.

3) Finally, other similar combos dyno at that level or hp.

Trust me, I won't bench race or falsely advertise without lots of backup, I don't know what it'd make on an engine dyno, but lots of things point to that number as installed in the car.

Thanks!
Jim

The old weight to mph is sure tough as there are always tradeoffs. We are currently working on swapping outta a mark into a 78 t bird for the gheto looks for the young kids on the street should be lots of fun.

bro i mean no offence but not sure you have 600hp does it really matter, after a couple weeks I decided to type this and hope I do not get flamed or offend you at all. I do not believe the 20% or 18% points rule on dynos. I think your c6 takes the same power to turn if you made 400hp or 600hp and dynoing my blown sbf before with a manual and after with a c4 confirmed that belief.

Actually percentage IS the most accurate way to rate the losses, due to inertia, factoring moment of... mass, where that mass is, etc. To apply a percentage is the easiest way to determine drivetrain loss. 15% is pretty much a standard percentage for manually shifted vehicles, Autos are generally at 17% to 20%.

It's all Physics.

Hey Jim, Thanks for the report and brake down of performance. Two thumbs way up !! Saw a Starsky & Hutch clone at Dave and Busters in Dallas just the other week. I spotted that car a mile away. Keep the updates comming and "Keep Livin The Dream"!

Thats alot of metal to move !! Nice.

bro i mean no offence but not sure you have 600hp does it really matter, after a couple weeks I decided to type this and hope I do not get flamed or offend you at all. I do not believe the 20% or 18% points rule on dynos. I think your c6 takes the same power to turn if you made 400hp or 600hp and dynoing my blown sbf before with a manual and after with a c4 confirmed that belief.

I have seen the subject mentioned before by some very smart people and they always say the subject is to in depth to cover. There is a bunch of fluid dynamics to take into effect. It takes more power to shear the fluid at a faster rate or something. I guess you could relate by trying to move your hand through water at a slow rate and see how easy it is compared to moving your hand at a fast rate.

bump

KOOL CAR ALWAYS LIKE TO SEE BBF CARS / ONLY SISSYS WEAR BOWTIES :twisted: :twisted: :twisted: MIGHT CHECK INTO A MOTORSPORTS 460 OR VICTOR jr. intake& a dominator

nice car. i have one just like it but it dont run, is a rust bucket/ money pit, and probly the couse of my future divorce but it sure does spin heads just sitting in the driveway.

It is considered a crutch by alot of racer but have seen heavy cars with a street converter around your size pickup 2 tenths in the 1/8 all from alot better 60ft with a 850 annual disharge holley. It can make a car leave violenlty, if it doesnt then you are in your peak torque curve . JMO ED