LS6427

iTrader: (2)

No drag track near me and not into anyway...........nuff said there.


So, I'll have right around 800 RWHP with my sprayed 441ci.

Whats the best ratio and strongest brand of gears to get for 50-160mph runs?

I have 3:73's now........but lots of people are saying I should go higher. I'm not at all worried about losing low end torque because no matter what ratio gears I get I'm certain the tires will roast from a dig anyway with a big ole 441ci.

Whatcha all think......????

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FirstYrLS1Z

iTrader: (4)

what stall are you running in your built 4L60E,don't see stall in sig.

LS6427

iTrader: (2)

Oops, sorry. Its gonna be a Jakes built 4L80E with a 3200 stall.

Unless there's a better stall ration for what I want to do with the car?

***I doubt a built 4L60E would stay together after just one hit of 800 RWHP..... lol Would be cool to try though.***

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01ssreda4

iTrader: (96)

Guess you are planning on running in OD? 160 mph is pretty fast for a third gear. What diameter are the rear tires?

LS6427

iTrader: (2)

Tires will be GY GS-D3's most likely, those tires are amazing. 315/35/17. But I'll have some type of 325's on there as soon as I get my new 11" wide rims for the rear later on. I'd like to stay out of OD, even with 2:73's you think I'll hit OD? Engine will rev to 6,800rpm. Limiter will be 7,300 like my 427ci has always been. But I guess we really won't know my rpm sweet spots till it gets chassis dynoed.

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FirstYrLS1Z

iTrader: (4)

data from
http://www.f-body.org/gears/

6800 rpm/315-35-17
not including 4th/OD
mph in 1st/2nd/3rd

3.73=45/86/139
3.23=53/99/161
3.08=55/104/169
2.73=62/117/190

I have to assume those figures would be with a locked convertor as an unlocked convertor(due to stall/slippage/blow-thru) would not see those mph figures.

LS6427

iTrader: (2)

Cool, thanks. I don't think it accounts for drag though......right? Or maybe the coefficient figures for each car you select is saved in there??
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bpittman

iTrader: (1)

Drag wouldn't play a part assuming the torque converter is locked. Unlocked you would see higher rpm than the gear calculator at a given mph.

LS6427

iTrader: (2)

I was just thinking, if drag "and horsepower" isn't taken into effect with all other data entered, then how can it really tell if the car will even make those speeds?

Or is that another type of calculator all together where HP and drag is entered also?

I see that the calculator here is simply figuring if the engine is spinning at x and the through the drivetrain x rpm's are put to the tires.........then the car will be moving across the ground at a given speed.

But is there a calculator out there that does it all....drag and HP included? Thats the only way I see a speed calculator to really be accurate, right?

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bpittman

iTrader: (1)

Yeah, that calculator is talking purely mechanical ability or potential, if you have enough hp to actually do those speeds is completely separate. I think there are some calculators out there for calculating top speeds with given hp, but i don't know of one offhand to recommend. May google "land speed calculator" or something like that.

Coefficient of drag for a fourth gen looks to be .320-.340, whatever calculator you find would need to take that into account.

LS6427

iTrader: (2)

Sweet, thanks, I'll look around. I'll have my new 441ci + 200 shot, approx. 800 RWHP, so I'm pretty certain it could hit that 190 in 3rd with 2.73's. But I'm just interested in very hard blasts to just 160mph so I'll probably go with 3.08's. Thats exactly what someone told me too about the CD .33

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