Blown, injected, 4-valve CJ's at Ennis...

[tex22]

Originally Posted by art leong

Why is everyone so hung up on MPH. It's an elapsed time race not a high mph race.
Let's see what happens when they line up against another car in class. If they run too fast they will get hit.
I've built cars for the last 30 years and have always been short in mph. But (present car not counted) I've usually had the quickest car. Like my old partner Tex used to say "they blew by me at the last mph light (back when it was past the finish)

I agree in a sense, but its also hard to back into a car going 140 past you. However besides Calvert who got a lot of breaks in Pomona these Cj's have not really went rounds in competition yet.

[Chad Rhodes]

Originally Posted by art leong

Why is everyone so hung up on MPH. It's an elapsed time race not a high mph race.
Let's see what happens when they line up against another car in class. If they run too fast they will get hit.
I've built cars for the last 30 years and have always been short in mph. But (present car not counted) I've usually had the quickest car. Like my old partner Tex used to say "they blew by me at the last mph light (back when it was past the finish)

we know these guys are playing the system, we're using MPH to try and figure out HOW MUCH they are playing the system

[Mike Gray]

Originally Posted by Chad Rhodes

we know these guys are playing the system, we're using MPH to try and figure out HOW MUCH they are playing the system

How Much? - My super-gas '69 mustang would run about 110mph in the 1/8 and it was capable of 9.40's in the 1/4. My car was lighter but by the 1/8 mile they already have that extra mass accelerating faster, how much difference would there be in the second half?

[bsa633]

Sorry ..little "off topic"

Originally Posted by Chad Rhodes

no, a bogus track is one where they subtract .4 from your ET and give you the record for it, even if the actual DA is sea level at the time

from anoter site:
The correction factor for Las Vegas is .9757

8.630 x .9757 = 8.42

--------------------
Jared Jordan
7551 SS/BA

just one example but alot of records are from "the strip"..C.W. was faster at the Dutch last fall than Vegas at the shootout..even with the factor..he's a good example because i think he's never "holding any".. may have developed over the winter also..so what would you like to do with E.T's from Atco,"Dutch" and Houston,Florida,"Alabama" made in the "winter"?

[bill dedman]

Art Leong asked, "Why is everyone so hung up on MPH. It's an elapsed time race not a high mph race."

That's true.
But, for purposes of engine output analysis, the e.t's can vary a lot depending on traction; mphs do not. That makes the mph figure a lot more reliable indicator of horsepower delivered to the ground.

You can make a run taking off in 2nd gear and it will absolutely KILL yout e.t., but won't affect the mph nearly as much.

These Mustangs are set up to leave very "soft" and for the mph they're turning, really should be running a lot quicker than they are... like 9.40's-9.50's. I'll bet their 60-foot times are nowhere near the 1.20s, where they should be.

But, the mph remains the reliable indicator of performance that tells HP output without much variance.

That's why people on here, who are trying to evaluate the output of these CJ engines, are "hung up" on trap speed. It's just the most accurate way to judge the potential of these cars.

[Chad Rhodes]

Originally Posted by bsa633

Sorry ..little "off topic"



from anoter site:
The correction factor for Las Vegas is .9757

8.630 x .9757 = 8.42

--------------------
Jared Jordan
7551 SS/BA

just one example but alot of records are from "the strip"..C.W. was faster at the Dutch last fall than Vegas at the shootout..even with the factor..he's a good example because i think he's never "holding any".. may have developed over the winter also..so what would you like to do with E.T's from Atco,"Dutch" and Houston,Florida,"Alabama" made in the "winter"?

you put the number on the scoreboard, you get the record. thats a pretty simple concept. you mentioned houston, thats a a double edged sword. I've raced there in august/september in 4200' DA. where's the correction factor for 110% humidity and 104 degrees? THERE ISN'T ONE! and you shouldn't get a freebie record because you are at a factored track.

[ALMACK]

Originally Posted by Mike Gray

How Much? - My super-gas '69 mustang would run about 110mph in the 1/8 and it was capable of 9.40's in the 1/4. My car was lighter but by the 1/8 mile they already have that extra mass accelerating faster, how much difference would there be in the second half?

Your car should run 146 mph in the 1/4 based on a 110 mph 1/8th.

There is a post on another forum where everyone posted both their 1/8th and 1/4 mph and I did the calculations. (Post # 64) Those are real world numbers.

1/8th mile per hour is usually ( but not always) 75 % of the 1/4 mile mph. In the last 200 feet of the 1/4 mile track, I would venture to say the rate of gain noses over, a bunch.

I study speed and distance as well as rate of gain ( as a hobby) in drag racing.

Anyway, here is a copy of everyones % of mph gain from the 1/8th to the 1/4 :

25.4 %
25.4 %
26.1 %
25.8 %
26.2 %
23.7 %
24.9 %
26.1 %
28.0 %
36.9 % ...?????
23.4 %
27.2 %
22.0 %
26.5 %
23.9 %
22.0 %
25.2 %
25.4 %
31.9 %
25.0 %
26.0 %
31.1 %
31.2%
32.7 %
24.4 %
26.0 %
29.9 %
24.5 %
15.8 % ...???
24.8 %
22.6 %
26.2 %
21.6 %
31.9 %
25.8 %
29.5 %
21.1 %
27.6 %
Here's the link:
http://www.yellowbullet.com/forum/sh...ad.php?t=72186

[Smitty]

Originally Posted by Bruce Noland

Jack,
CJ at Atco to the 1/8 = 6.16 et @ 111.86 mph. CJ at Dallas to the 1/8 = 6.210 et @ 110.01 mph and 1/4 = 9.794 @ 140.17 mph. Looks like the CJ at Atco could have gone close to 142 mph.

Smitty,
It may look like Ford and Mopar have pulled this stunt off but heads have begun to roll over this mess. Things can still change. How will it hurt you, if these cars are moved to another class?

How will hurt me, will it will pull the 15 year old paint and 15 year old valves out if my cylinder heads when they leave me or come by heap. It doesn't concern me that they have that much potential because anything can happen on that starting line. If those guys get in SS/IA or SS/HA we will run, I have my car to have fun and I know what my capabilities are so I don't get uptight. Heck I am in Florida, if you don't know one of the fastest if not fastest at sea level non factored SS/IA cars is here and it belongs to Rick Brewer. I know I can't out run him so I don't worry about it, he's go me covered by a second.
My whole point is we all need to run our cars and not worry about the guy in the other lane, if he has to put a number on the window make him run his number.

[442OLDS]

Does anybody know if these AA/SA Fords are running LOCK-UP torque converters?

[bill dedman]

Lockup convertors are not legal in Stock unless they're the OEM actual piece, are they?

That's what I've always heard. I think these CJ's have aftermarket convertors in them, which would disallow lockup units.

Don't bet the farm on that; It's just what I assume, based on what I've heard.