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oldtin
oldtin UltraDork
6/6/13 1:53 p.m.

to be at the top of the heap for a challenge car for the last few years it's taken a ratio of somewhere around 9lbs/hp or less.

93EXCivic
93EXCivic MegaDork
6/6/13 1:56 p.m.

I think it is more about the power delivery then anything else.

pinchvalve
pinchvalve UltimaDork
6/6/13 2:10 p.m.

There's Goldmember / Austin Powers joke in there somewhere.

Zeitgeist
Zeitgeist New Reader
6/6/13 2:43 p.m.

Many posts have already hit on some of my thoughts on the topic like 10:1 ratio being about right for fast enough and fun but not crazy as well as how much more fun it is to push in a slow car and drive at the limit more easily without being triple digits speeds. However my thoughts change from one side of the issue to the other when I think about track vs street.

On track I love having a slightly less powerful car and pushing to the max where it is safer to do so. I also get the most satisfaction when my lower powered car sneaks up or passes the higher powered car because I know it is coming down to skill. On the street however there are far fewer turns linked together and even when there is a nice stretch traffic,laws and common sense safety make pushing risky at best. Thus my thoughts for the street are more along the lines of more power for ease of entering traffic, passing and short stop light jumps to speed to get out in front of traffic or a fun,short show of performance. This way I am exploring the limits of the car with a good no spin launch and run to redline in a few gears while sightlines are good and more people engage in the activity. Where getting near the limits of handling you are more limited in sightlines and less people to have a spirited encounter.

ProDarwin
ProDarwin SuperDork
6/6/13 2:46 p.m.

On the street I don't think I can remember the last time I used more than maybe 55whp in my DD. On the street the golden ratio is the one that gets me the best gas mileage.

wspohn
wspohn Reader
6/6/13 5:46 p.m.
mazdeuce wrote: Anything better than 20:1 is something I can live with. The car's I've been in that have 10:1 or better are all really fun.

Agree - fun starts at 10:1

I have 4 cars that qualify and all are a hoot to drive.

Redline
Redline New Reader
6/16/13 11:55 a.m.

My little Neon ACR had about 18.25#:1hp, the little S14 has about 17.3:1. It's ten times more fun to drive. Must be the RWD factor...

Knurled
Knurled UberDork
6/16/13 11:59 a.m.
Giant Purple Snorklewacker wrote: The correct amount of grip is infinity.

LIES

Warren v
Warren v Reader
6/16/13 2:16 p.m.

Here's a little chart I keep up with:

www.tinyurl.com/power2weight

stan_d
stan_d Dork
6/16/13 4:52 p.m.

My v8 240sx was 7.2 and was easily driven in snow and rain. But it was difficult to remove the grin off of my face. After 5 yrs I wanted more power though,I was used to it and thought it had slowed down.

Jaynen
Jaynen Dork
6/16/13 5:49 p.m.

A mildly built tune/cam/exhaust 1.8 NA warren should be putting down 145-150whp and is one of the cheaper ways to go that gets you into 10.0 territory on the exocet without adding FI

Hasbro
Hasbro Dork
6/16/13 7:06 p.m.

Weight:hp to me is like hertz for suspension; it gets you in the ball park. For a street car I like between 14:1 and 8:1 whp, with about 10 or 12:1 being ideal, depending on the type of vehicle. I had a gorgeous '04 Miata with a really nice suspension set up and a stock motor. It really needed about 200+whp. My Si is currently 17:1 (stock is 20.4:1) and the goal with the current K20A3 is 12:1. After that will come a K24 at a little under 10:1.

Appleseed
Appleseed UltimaDork
6/16/13 9:02 p.m.

Golden power/weight ratio? As "Maverick."

Redline
Redline New Reader
6/16/13 10:33 p.m.
stan_d wrote: My v8 240sx was 7.2 and was easily driven in snow and rain. But it was difficult to remove the grin off of my face. After 5 yrs I wanted more power though,I was used to it and thought it had slowed down.

nice! I was looking at KA-T for 4xxhp at 5.2#:1hp

Mr_Clutch42
Mr_Clutch42 New Reader
6/22/13 8:47 a.m.

Power to weight ratio is an excellent determination for an auto-x car or a track car. For the street, i gets complicated of course.

You also forgot about the Toyota Supra, and the Hyundai Genesis Coupe.

oldeskewltoy
oldeskewltoy Dork
6/22/13 1:01 p.m.

My Corolla is 12.94....

MichaelYount
MichaelYount Reader
6/22/13 1:16 p.m.

I guess I'd add - it depends on what one, as a driver, gets the biggest kick out of. If you just must have stupid acceleration levels, then that LBS/HP number has got to be low, and you need the chassis dynamics to put the power to the ground. If you really enjoying turning/stopping -- then the weight to power ratio just isn't that important, although you probably want the weight number to be smaller. I've been playing with cars (including racing them) for almost 45 years. If you twisted my arm and made me answer the question 'which one has been the most fun to drive day in and out?' I'd have to say it's the naturally aspirated Mini Clubman I have right now. All stock but for a sticky set of Kuhmos. With 116HP and about 2700 lbs, weight to power is nothing to write home about. But it sure is responsive to driver inputs - and to me, that = the most fun.

jere
jere Reader
6/22/13 1:27 p.m.

I suck at math but as long as I can spin the tires from a roll in the first three gears I am happy.

jmc14
jmc14 Reader
6/22/13 3:57 p.m.

My self built Speedster weighs 1980lbs and has a modestly modified LS6. On a Dyno it shows 415 rwhp. With me in the car it weighs 2210 lbs. 5.32lbs per HP seems about right to me.

MichaelYount
MichaelYount Reader
6/24/13 7:05 a.m.
jmc14 wrote: My self built Speedster weighs 1980lbs and has a modestly modified LS6. On a Dyno it shows 415 rwhp. With me in the car it weighs 2210 lbs. 5.32lbs per HP seems about right to me.

That oughta git 'r done.

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