1/8 mile. Speed 78 mph.

Posted By: Cuda67

1/8 mile. Speed 78 mph. - 09/21/10 10:35 PM

Hi and thanks for any help.
A friend of mine has a 66 Coronet that according to him using a gps and it told him that at 1/8 mile he was going 78 mph. The car is a 440 with a 484/284 cam. 3.55 rear and a 750 holley with 9.5 or so compression. It has some kind of very cheap plastic and aluminum pistons. Any idea what it would do in a 1/4. Probably a hard question to answer, had to ask.
Also he wants to race my 67 Barracuda, and it has a 383, same cam and rear but smaller dia tires. Does have a 770 holley and 10.5 compression. I don't want to race him fearing the results will reall make him mad.
He keeps bugging me. Thanks again
Ray

Posted By: stumpy

Re: 1/8 mile. Speed 78 mph. - 09/21/10 10:52 PM

My 4400lb truck is doing 78 mph in the 1/8 at 8.98 et. Which translates to about a 14.00 1/4 mile. I don't know if this would be any example for his car.

Posted By: FurryStump

Re: 1/8 mile. Speed 78 mph. - 09/22/10 01:56 AM

Race him on a track, let the chips fall where they may. My 408 stroker in my 68 fastback runs 8.20 at 86.41 in the 1/8 and 12.74 at 108.52 in the 1/4, on a 26 inch street tire with a 3.23 gear, Losing isn't the end of the world there is ALWAYS someone faster out there.

Posted By: terzmo

Re: 1/8 mile. Speed 78 mph. - 09/22/10 02:49 AM

multiply the 1/8 time by 1.57

Posted By: Mr.Yuck

Re: 1/8 mile. Speed 78 mph. - 09/22/10 12:07 PM

Quote:

Hi and thanks for any help.
A friend of mine has a 66 Coronet that according to him using a gps and it told him that at 1/8 mile he was going 78 mph. The car is a 440 with a 484/284 cam. 3.55 rear and a 750 holley with 9.5 or so compression. It has some kind of very cheap plastic and aluminum pistons. Any idea what it would do in a 1/4. Probably a hard question to answer, had to ask.
Also he wants to race my 67 Barracuda, and it has a 383, same cam and rear but smaller dia tires. Does have a 770 holley and 10.5 compression. I don't want to race him fearing the results will reall make him mad.
He keeps bugging me. Thanks again
Ray

if he doesn't have a converter you should take him. Tell him if he wants his car to run yank that poo poo cam and get a cheap Summit 488 cam. He'll drop over a second off his et. Both of you should be runing at least a 3000 stall.

Posted By: feets

Re: 1/8 mile. Speed 78 mph. - 09/22/10 08:00 PM

The GPS is giving him an exact speed where the drag strip gives you an average speed over a distance. The GPS speed will be slightly higher at the 1/8 and 1/4 mile traps.

Something to keep in mind.

Posted By: ramrod

Re: 1/8 mile. Speed 78 mph. - 09/22/10 09:01 PM

Quote:

multiply the 1/8 time by 1.57

I plugged my numbers into this formula and it is surprisingly accurate....

Posted By: Cuda67

Re: 1/8 mile. Speed 78 mph. - 09/22/10 11:41 PM

Would the Summit 488 help my Cuda? I am sure I can take his car as they sit. He is going to the track this week-end providing it doesn't rain

Posted By: Mr.Yuck

Re: 1/8 mile. Speed 78 mph. - 09/23/10 12:34 AM

Quote:

Would the Summit 488 help my Cuda? I am sure I can take his car as they sit. He is going to the track this week-end providing it doesn't rain

depends on the combo. If you have a low compression (less than 9.5:1) car with less than a 3000k stall and 3.91's yes. The cam pulls great. I went from 14.19 to 13.38 with a swap alone. I had the mopar 484 9:1 440 w/ 906 heads, headers, CH4b intake and eddy 750. I swaped the cam for the 488 and that was it. Later I added fresh air, dropped me to 13.11 then a 750DP to 12.90. (67 coronet)