0 to 60 time?

[NeuroToxin]

My Mom and Pop -in law just bought some hotshot BMW last week and he came over bragging about how fast it was and it got me thinking about what might be able to beat it. Salesman told them that the only thing faster from 0 to 60 was some sort of Ferrari. When he told me the 1/4 mile speed, it turned out to be an unimpressive 12.8 or some such. No, that's impressive to the masses, but for gearheads - not so much.

Being a Cobra Owner wannabe, I do not know what to expect for 0-60 or the 1/4 mile out of these puppies, so post yours.

BTW, the reason I came on the board to ask this was that while riding today in said BMW, I spotted a Cobra on Zebulon Road in Macon, GA. Any of you guys the guilty party?

[Excaliber]

Actually, you may have to re-adjust your expectations. We typically see the "best of the best" when it comes to ET, 60 ft, 1/8 and 1/4 mile times posted. As it concerns a very high percentage of these cars, many would be happy with a 12.8 quarter. But you'll rarely hear them post that!

Lets look at a fairly common replica as an example. An FFR with the classic 302, 5 speed, live axle and something like Goodrich TA's or Goodyear GT-11 tires. Now let's put a "decent" after market cam in the 302, some nice AFR heads and a proper single four barrel. Or you can tweak your EFI if you prefer, no matter. Plenty folk be happy to break into the 12's, not kidding, with such a setup.

OK, out with the 302, in with a 351W, another common setup. That will likely get into the 12's, mid, maybe even low 12's if it's really good. Tires are a HUGE factor here, better step up to something with some bite. Avon's maybe ($400 a tire, not gonna happen with our budget Cobra). Goodyear bill boards are a good choice, but controversial and big enough they might not fit without "jacking up" the rear or something like it, not good. Tires remain a conondrum on what to do!

Want to get in the 11's? Aint gonna happen without figuring out the tire thing first, you WILL have to step up to something. The 302 or 351 will need a SERIOUS build as well, a few bolt on after market parts aint gonna cut it.

I'm running a side oiler, high riser heads, dual fours, Goodyear Bill Boards (about the best you can get for street/strip traction without going to slicks). My "race motor" dynoed WELLL OVER 600 horse, 7500 rpm limit, nasty as you can get. Solid roller cam, 12.5 to 1 compression, race gas was a MUST have. Drag race carbs (6 mpg), barely streetable. Sitting down? It ran 11.90, on the Goodyears, traction challenged all the way. 1/8 mile was right at 8 seconds for a 100 mph.

Rebuilt the motor, dumped that race cam, went with a "lumpy idle" flat tappet, 6500 rpm. Reduced compression to 9.6 to 1. Threw out the drag race carbs, went vacuum secondary smaller duals. Never dynoed after ward, I figure I gave up a good 150 horse. Ran the 1/4 in 11.99, doubled my mpg from 6 to 12 (actually better on the freeway), WAY more "streetable", pleasant daily driver now. Cannot FEEL the difference in power, I just can't burn rubber as far as I used to.

It's all about the tires! Which is why I just mounted some Goodyear slicks, hand grooved for the street (still illegal as hell I guess), but whatever.... I think I CAN DO 11.90 again, maybe much better even! With the "street" motor, now that I got some decent rubber!

12.8? Not bad, I'm impressed.

["Q"]

Hi NeuroToxin

Running a engine only Chevy 406ci (yeah, yeah I know...) with an auto 350t/box (yeah, yeah I know) and 3.07 L/S diff. Full street car, daily driver.

¼ mile- 12.621 seconds, ¼ mile speed - 108.14mph on Toyo street tires.
¼ mile– 12.497 seconds, ¼ mile speed –106.52mph on M/T ET Street
0 to 60 mph – 4.47 seconds at Toyo street tires
0 to 60 mph - 3.9 something on M/T ET Street Radials (Great grip and fully street legal)(last run measured with a G-tech).
These times were achieved at an altitude of 5188 ft.

[map]

My old 84 Capri, @ 3200Lb 2.3 (140ci) turbo T-5 373 gear daily driver 29mi gal. 12.30 118.0 @25lb. 1.63 60ft on a 200K 80 dollar short block . This year in the 11s.

My pinto @ 2360lb with the same combo should be in the 10s.

[Dwight]

Horsepower and tires.

Just keep throwing money at it till you go as fast as you want to.

Hot Finger's Chev powered Cobra run's in the 9's He has about 800 hp.


a 302 stroked to 347 should get you 450 - 500 hp.

a 351W stroked to 408 should be about 525 hp. This set up is easy to drive around town and IT's Fast.

Of course you need great tires and the suspension set up to use the horsepower (TORQUE) you have.

Dwight

[map]

You can build a 10 sec daily driver for 5K.

[Excaliber]

Less! Buy an old beater Fox Mustang and a bottle of nitrous.

[Bernica]

What Excalibur said above and everyone else has said about tires and horsepower. Just remember a scattershield (SFI bellhousing)!!! Pure physics....the more power, the stickier the tires, the more stress on everything right there under your feet, legs and nether-regions. Sometimes something gives, and when it does it's not pretty.

[Hotfingrs]

My 60' times are in the 1.39 range. According to the calculator that's about 58.8 mph.
http://golenengineservice.com/calc/calc60mp.htm
So I'm pretty sure I can hit 60mph in under 2 sec. 1/8th mile comes in a hair under 6 seconds, and 1/4 in the 9.7-9.8 range.
Never had slicks on the car, only run M/T street radials. I break enough stuff with these tires, let alone put the added stress of slicks on the rear.

[Excaliber]

Thanks Jack! Thats a good calculator link. I always wondered HOW folks even measure the 0-60 MPH time, I can't figure it out. Stop watch doesn't really get it. 0-60 FEET is easy, any drag strip will give you that.

[RET_COP]

If you could hook these cars up, and being that most 351s will, and do produce 400+ hp with a decent performance build, you could run all day in the 11s @ 115mph avg.
Like Excaliber said, tires are everything with only 2500lbs to work with.

[4into4]

A FFR with a bone stock 225 hp engine and a 2.73 rear axle will do 0-60 in 4.7, and low to mid 13 quarter mile. Ive even heard of them breaking into the high 12's once or twice with that stock drivetrain. Car and Driver tested a mildly modified FFR with around 300 hp that did 0-60 in 3.6, and 12.0 in the quarter. I don't know about other replica manufacturers and how they compare to FFR.

My daily driver is a BMW M3, and it's a fantastic car. Very well built and quick, but in acceleration, it would never come close to my FFR that has a moderately built, very streetable 331.

[CobraEd]

2.73 gears are for the Bonneville Salt Flats.


.

[Excaliber]

2.73 ratio is likely from a car with an automatic trans. Thats pretty high ratio for a stick. Still, I'd rather be to high behind a T5 stick than to low because the 1st gear trans ratio is all ready super low.

With a .6 over drive and a 2.73 you could shoot for a 200 mph top speed with a "little work" to the engine...

[twin turbo]

I used my G-tech meter a few years ago to log a couple 0-60 mph times on the street as I was switching from Nitto drag radials to MT ET street radials. The Nittos averaged 3.1 seconds, The MT's averaged 2.8 seconds. Tires do make a difference.

[undy]

Originally Posted by Excaliber

With a .6 over drive and a 2.73 you could shoot for a 200 mph top speed with a "little work" to the engine...

Yea, a little work... Like maybe around 800 HP to hit 200 mph with our flying bricks. That's assuming you'd find a way to keep it from going air borne.

[SPF1061]

SPF with a stock Roush 427R (except for very tweaked AD 750cfm Holley based carb), 3.27 Torsen rear gears, 295/15 Avon rear tires. Best 1/4 mile time: 11:37 / 124.9 mph. No idea what 60mph times are, but not that great I would expect. 60 ft times are nothing to write home about. No action without traction.

[4into4]

Originally Posted by Excaliber

2.73 ratio is likely from a car with an automatic trans. Thats pretty high ratio for a stick. Still, I'd rather be to high behind a T5 stick than to low because the 1st gear trans ratio is all ready super low.

With a .6 over drive and a 2.73 you could shoot for a 200 mph top speed with a "little work" to the engine...

Probably everyone on this forum realizes that a 2.73 rear axle is good for top speed, and bad for acceleration. The title of the thread is "0 to 60 time." The point I was making is that with a stock 302, and an axle ratio that hinders acceleration, 0-60 times still in the high 4 second range are fairly respectable, and that drivetrain leaves tons of room for improvements/modifications.

[Excaliber]

4into4, you make a good and valid point about the high rear gear, definitely adds to the picture here. My rear gear is the typical 3:31, not "to high" but still up there as it concerns a "hole shot" to 60 mph. BUT, I also have the close ratio top loader with a pretty high first gear ratio. The combination means 65 mph in FIRST GEAR, hardly a drag race setup.

I would guess even with your 2.73 ratio when coupled with a lower first gear in the trans actually gives a lower overall ratio than I have! I can almost run third gear across the finish line, but shift into fourth right at the "back door". My calculated top speed is around 175 mph, maybe with a "little engine work" ( ) I could get there.

Low 13's sound about right for your setup, stock 302, even if you had lower gears. All though, I suspect the higher gears are actually HELPING not hurting as it tend to limit wheel spin. Some guys have run a faster ET by starting out in SECOND gear and avoiding first all together. This often results in severe clutch damage though...

My stock 302 Excalibur, with good rubber and ULTRA LOW gears ran a 14 second ET! How embarrasing is that.

[4into4]

Originally Posted by Excaliber

4into4, you make a good and valid point about the high rear gear, definitely adds to the picture here. My rear gear is the typical 3:31, not "to high" but still up there as it concerns a "hole shot" to 60 mph. BUT, I also have the close ratio top loader with a pretty high first gear ratio. The combination means 65 mph in FIRST GEAR, hardly a drag race setup.

I would guess even with your 2.73 ratio when coupled with a lower first gear in the trans actually gives a lower overall ratio than I have! I can almost run third gear across the finish line, but shift into fourth right at the "back door". My calculated top speed is around 175 mph, maybe with a "little engine work" ( ) I could get there.

Low 13's sound about right for your setup, stock 302, even if you had lower gears. All though, I suspect the higher gears are actually HELPING not hurting as it tend to limit wheel spin. Some guys have run a faster ET by starting out in SECOND gear and avoiding first all together. This often results in severe clutch damage though...

My stock 302 Excalibur, with good rubber and ULTRA LOW gears ran a 14 second ET! How embarrasing is that.

Embarrasing? I remember how happy I was back in the early 90's, to finally own a car ( IROC Camaro ) that ran a high 15 in the quarter ( my first run was 16.2 )

Just for the record, the 2.73 car stats were from a FFR that Car And Driver tested. Mine is 3.55, with a 2.95 first gear, and my 302 is now stroked to 331.You made a good point; the taller gears make it easier to control wheelspin. Sometimes, I think about changing to 3.23, or even 3.08 gears. There's always trade offs though. I have an aluminum flywheel, and fair amount of cam, so getting off the line smoothly would be harder with the taller gears.

This makes me want to go for a drive!