Auto or manual tranny?

A manual MPHs a lot higher...

 

auto

 

Many assumptions but...

Lowest 12s

If it's an average weight Chevelle, figure around 420 RWHP.

 

lowest 12's if it hooks, mid to high if it doesn't

 

Yep, 12.0's hooked.

 

NO hook off the line yesterday. That run was a 12.51 at 112.12MPH with a 2.089 60 FT.

 

12.1

A well-set-up street car, with good traction, should mph according to its HP; and the product of ET and mph should be around 1350. If the number is lower, it usually indicates too much gear (good ET but low mph); if the number is higher, it's either poor traction (feathering the throtle off the line, etc.), or too tall of a gear (poor acceleration early in the run)

Looks like a 12.5 with a poor 60' is just about right. At that mph / HP, you should be able to pull a 1.8s 60', compared to your almost 2.1; since .1 off the 60' is usually worth about .2 off the ¼, your numbers pretty much add up.

 

My old 442 clone went 11.96 at 112 MPH w/a 1.66 60 ft.

 

I always told Tony he was going to see 11's, he'll get it figured out yet!

 

My old 442 clone went 11.96 at 112 MPH w/a 1.66 60 ft.

Sounds alot like my last run, 11.93 @ 112 with a 1.78 60'. Don't know if the MPH "matches" the ET though.

 

Well something is gonna happen here. :clonk:
Previous best MPH was 100.68. Previous best ET was 12.34. The MPH is up (112.12) indicating more power. I did manage a best of 12.38 at 111.75 with a pussyfoot starting line techique.

incrementals were..
60' 1.897
330' 5.222
1/8 7.999
1000 10.378
1/4 12.388
MPH 111.75

I gotta get me some more cowbell! and a little traction too

 

I gotta get me some more cowbell!

Yes! Bruce Dickenson needs more cowbell baby!!

 

I was paired with another Camaro friday night, his was a race car and tubed with 14" slicks, I dont know what engine but it was an auto trans. On our time slip he ran a 11.72 at 111.8mph with a dead hook 1.554 60ft. I ran a 11.71 at 119.3 and spun to a 1.779 60ft. So solid 11s are possible at 112mph if you can launch hard.

 

I don't know if it's just me,or coincidence or what,but it seems if you have tire spin off the line your e.t. suffers but your mph is quicker.I've got quite a few timeslips that indicate this.I heard an explanation of why that happens but can't quite remember it.Something like if the car has tire spin it catches up to it and after it hooks the rate of acceleration is greater because of the wheelspeed.When it hooks off the line the rate of acceleration isn't as quick but there's no wasted energy(tirespin) so you get to the line quicker.

Is that the jest of it?

 

Twelve ohs would be the most likely at 112 MPH. If it runs an 11 it's hooked up pretty good. Spinning will generally pick up the trap speed some while hurting the E.T.

 

I've run 11.89-12.0's at 112 mph with high 1.6 60ft times.

 

mmm, don't know about that, maybe some wheelspin that may be true. The timeslips on my car that I got from the old owner show it picking up around 5-6 mph by going to slicks. The slicks were 29 in vs the 28 in street tires so maybe it runs out of the powerband on the shorter tires, doesn't seem to but that maybe possible. That is good if that is the case cause I am going to put taller tires on it instead of switching gears, at least until my st1o blows apart. I am talking about at least 2 gears of rubber, not just alittle squeak outta the hole.

 

In an efficient "doorslammer" you'd be somewhere between 11.4's and 11.6's, in a basic street car you should be around 11.9's and 12.1's. Most problems with basic streetcars is simply traction(assuming you have the proper engine/trans/rear combo). Thanks, Gary in N.Y.

 

The car is street legal. its all steel with a full interior incuding bench seat. It weighs between 3850-3900 with driver. Im guessing 12 teens will be possible with a good hooking starting line. Im not sure about 11's.
The true race cars were having trouble with hooking up last weekend. I cant even judge where Im at with weight transfer till I get a better day to test.

 

1970 SS 454 LS6 El Camino about 510-530 hp, streetable. Best time: 11.75 112.76 mph, 1.621 60 ft. .009 R.T., hooked M.T. 28-10.5 x 15. Th400, 4.10 gears. 12.00's @ 110 mph with warm marginal air. Have Fun!