350 Vortec Head Track Test Update

[skinny z]

At 3200 pounds 440 hp should run 11.0s @ 120 mph if car is set up reasonably well.

Isn't it about average HP to the tires as seen over the operating rev range? 440 peak HP that's got a converter and gearing to keep a tight 1500 RPM operating window should be much quicker than the same 440 HP that's made cover 3000 RPM.
Mark more or less said that to me when I was discussing my own mid 12 second car. I suggested a 400 peak HP estimate. He said that's probably closer to 350. And as an average, seeing as the converter in that car didn't do a whole lot for the shift recovery with a 3000+ spread between 1st and 2nd (6500 to 3400), 350 seems about right.
These Super Stock know how to dial in a car that's for sure.

[vortecpro]

At 3200 pounds 440 hp should run 11.0s @ 120 mph if car is set up reasonably well.

Isn't it about average HP to the tires as seen over the operating rev range? 440 peak HP that's got a converter and gearing to keep a tight 1500 RPM operating window should be much quicker than the same 440 HP that's made cover 3000 RPM.
Mark more or less said that to me when I was discussing my own mid 12 second car. I suggested a 400 peak HP estimate. He said that's probably closer to 350. And as an average, seeing as the converter in that car didn't do a whole lot for the shift recovery with a 3000+ spread between 1st and 2nd (6500 to 3400), 350 seems about right.
These Super Stock know how to dial in a car that's for sure.

I know nothing about HP to the tires, I only know what a calibrated engine dyno tells me. Wait until I get the tires and then the transmission dialed in, theres more in the trans. Stay tuned...

[vortecpro]

At 3200 pounds 440 hp should run 11.0s @ 120 mph if car is set up reasonably well.
I am surprised that 355 make that power with stock/ cast heads,cam etc.
Mark might have some rotating friction freed up in ring pack etc.
Don't be surprised if short block rolls over at 10 ft/ lbs or less

Remember 1320/121.3=10.88 when I get done I will be 2 + tenths under that formula, and I won't touch the engine. Then I will touch the engine

[77cruiser]

Mark could run 11's in the rain.

[vortecpro]

Mark could run 11's in the rain.

I made many runs Sunday-only (2) made it down the track, I had a traction problem, it felt like I was in the rain.

[vortecpro]

Mark could run 11's in the rain.

I made many runs Sunday-only (2) made it down the track, every time I brought it up hard on the foot brake it blew the tires off, I had a traction problem, it felt like I was in the rain.

[Lloyd klem]

We had a couple 440 hp Dyno engine s run in 10.60's at track.Always things to find that work at track and not on a Dyno.We had one car at 3185 and other was 3230ish with drivers.Amazing what you can find in converters,trans,and rear gear mods.

[vortecpro]

We had a couple 440 hp Dyno engine s run in 10.60's at track.Always things to find that work at track and not on a Dyno.We had one car at 3185 and other was 3230ish with drivers.Amazing what you can find in converters,trans,and rear gear mods.

Exactly, my trans builder performed a good quality build, base lined the car and picked about .25 after he performed his tricks to the same rebuild, car went faster every time he went into the trans. Its so important to make sure your trans guy (really) knows what to do, most have no idea. The driveline is so important!

[rebelyell]

Mark vortecpro:
regarding friction --- what chain? single, double, morse-hyvo ? Brand of chain itself?

[vortecpro]

I use Rollmaster

[steve cowan]

At 3200 pounds 440 hp should run 11.0s @ 120 mph if car is set up reasonably well.

Isn't it about average HP to the tires as seen over the operating rev range? 440 peak HP that's got a converter and gearing to keep a tight 1500 RPM operating window should be much quicker than the same 440 HP that's made cover 3000 RPM.
Mark more or less said that to me when I was discussing my own mid 12 second car. I suggested a 400 peak HP estimate. He said that's probably closer to 350. And as an average, seeing as the converter in that car didn't do a whole lot for the shift recovery with a 3000+ spread between 1st and 2nd (6500 to 3400), 350 seems about right.
These Super Stock know how to dial in a car that's for sure.

Your right Kevin and that's where guys should be looking.
Some things to consider in my opinion -
Very few street car guys can get there stuff to run really fast without boost.
Not many guys want to run 7" - 8" converters and 5.0 :1 rear gear etc.
Trust me when I say I am not trying to take anything away from anyone, I follow stock eliminatior as well and try to work on my own rig to run as best as possible with what I have.
I still think few people could make the power Mark is making with the parts described, I know I couldn't but I am impressed with what he is doing and sharing along the way.

[steve cowan]

At 3200 pounds 440 hp should run 11.0s @ 120 mph if car is set up reasonably well.
I am surprised that 355 make that power with stock/ cast heads,cam etc.
Mark might have some rotating friction freed up in ring pack etc.
Don't be surprised if short block rolls over at 10 ft/ lbs or less

Remember 1320/121.3=10.88 when I get done I will be 2 + tenths under that formula, and I won't touch the engine. Then I will touch the engine

I was using moroso slide rule for my description

[ClassicComp]

What trans do you use?

[ClassicComp]

I wonder what the Camaro is worth et&mph wise compared to your Chevelle?

[vortecpro]

I know one thing, and this something that should be discussed on here, how RPM is used in drag racing. I think the Camaro would run more MPH than the Chevelle. Lets consider this: Which one makes more TQ @ the rear wheels?

1. 500 HP @ 5600 RPM 550 TQ X 2.52 first gear, 4.10 final drive
2. 440 HP @ 6400 RPM 440 TQ X 2.75 first gear, 4.88 final drive