E.T.s

[suicidebomb]

OK folks, I have what may very well be a dumb ??? My little altered seems to run anywhere from 5-15 m.p.h. slower than other cars running the same E.T. I donot understand why this is. The car normally runs 60 ft times in the 1.30s,and is pretty consistant. Hilborn stack injected 406 SBC with a glide that I footbrake.

[Tod74]

Does it run out of motor on top? maybe too much gear?

[v8Fiero]

could be a variety of things, what ets are your running?

you could be launching harder then the others,
too small of a carb,
too small exhaust,
ignition isnt timed all the way, keep running passes slowly bumping the timing up until you hit your fastest mph then you have the perfect timing for your combination.
you could have a torquier cam, a lower rpm powerband when others in your class have higher.
to much spoiler if you have one
to much gear like Tod said
etc....

[suicidebomb]

E.T.s are mid-nines, stack injection N/A on methanol. 1 7/8 zoomies. Ign-magneto 38 degrees total adv. cam- flat tappet solid .525 lift 290 adv. no spoiler or wing of any kind. 4.11 gear. thanks

[suicidebomb]

OH, i forgot it turns on the shift light in the traps.

[zipper06]

E.T.s are mid-nines, stack injection N/A on methanol. 1 7/8 zoomies. Ign-magneto 38 degrees total adv. cam- flat tappet solid .525 lift 290 adv. no spoiler or wing of any kind. 4.11 gear. thanks

Cam is way too small, i run .668 roller in my 377" and when it was a flat tappet it was a .597 with a 406", 38 degrees is alright maybe a little high for a light car, you didn't say what size tire but you shouldn't be running out of rpm in the lights. Header size is o'k but zoomies do not performe as well as a good set of headers, even on stacks injection, blowers yes.

JMO

Zip.

[shawnp]

Zipper is correct. There are some variables. I would guess you are running a glide. Where are you shifting at? Also, with injection, you will see a quicker 60 foot and ET due to the response of the injection. We ran enderle hat injection for several years. Saw 3-4 mph pickup going back to a carb but lost .15-.20 ET. Wide open our dragster ran 8.0's-7.90's at 170mph with 60 foot times at 1.15-1.16. Running a high gear set up( shifting the car at 0.10) we would run 8.60's at 168mph with 60 foot times of 1.40-1.42.

[suicidebomb]

The tires are 33s. I am running a powerglide. Shift at 6500. I have been looking at a lunati roller, 630 something lift, and i forget the duration but it was a lot, 330 maybe but I forget. Any suggestions? What about headers, collector length etc. I hate to lose the zoomies, they look cool, and they sound gooood! But I will for a good cause, What about piston to valve clearence, Im running wisecos with i think .250 dome. If you need more info, ask and ye shall receive. thanks.

[shawnp]

Try your shift point at 6800. That may bring your trap RPM down with your set up. I just don't think you are going to see a sbc bring the same mph that you will other cars running same ET's with BBC. That has always been 1 of the complaints of a few friends running sbc in their diggers.

[suicidebomb]

I donot really want to go a bunch faster anyway. 8.90s would tickle me till I curled my toes. My wife might want to pick a fight, much faster than that. Or maybe i AM just yellow. A man has to know his limitations!

[shawnp]

A friend and a guy that built several dragster for us would have his wife come to the track once a year or every other year. I will never forget when he brought out his new 250 slip joint T/D car. His wife said to him, " Honey, when did you get that car?" He said," I built it over the winter." After the 1st run she said, " Honey, what happened to 8.20's and 160 mph?" He said, " 6.80's at 200mph sounded a little funner."

Needless to say, she did not come back to the track the rest of the year. LOL.

[suicidebomb]

Heeey! I became an apprentice, i used to be a show guest. Did I do good?

[suicidebomb]

200 miles an hour will DEFINATELY get my wife lookin sideways at me!

[shawnp]

What are you running for a convertor?

[zipper06]

The tires are 33s. I am running a powerglide. Shift at 6500. I have been looking at a lunati roller, 630 something lift, and i forget the duration but it was a lot, 330 maybe but I forget. Any suggestions? What about headers, collector length etc. I hate to lose the zoomies, they look cool, and they sound gooood! But I will for a good cause, What about piston to valve clearence, Im running wisecos with i think .250 dome. If you need more info, ask and ye shall receive. thanks.
Here's the cam you're talking about, it's a total powerhouse, works great with 406" motor, but if you want to spend less money and stay with a flat tappet, here's the one that will also work really good it's a bullit.
Second you're running a s/blk, they require RPM, shift it at 6800 atleast, leave as high as you can. I leave at 4800 with a 5500 converter. I run 5.43 gears with a 3200lb car 1.41 60' and run 124.85 1/4 with 14X32 tires. someone told me about 1 hr ago i can't run the QTR. with 5.43 gears, i said come watch. What RPM am i crossing the finish line, i don't know, probably 7500/7800, but it's still there for next round if i win.

Headers are o'k at 1 7/8 with a 406".

JMO

Zip.

Lunati roller specs.

http://img30.picoodle.com/img/img30/4/2/19/t_lanotticamsm_2f851e3.jpg (http://www.picoodle.com/view.php?img=/4/2/19/f_lanotticamsm_2f851e3.jpg&srv=img30)

bullit flat tappet specs.

http://img32.picoodle.com/img/img32/4/2/19/t_bullitflattm_8c3b514.jpg (http://www.picoodle.com/view.php?img=/4/2/19/f_bullitflattm_8c3b514.jpg&srv=img32)

[suicidebomb]

The converter is a 52-5600 stall, TCI I think. Can not remember, I have a bad case of CRS. Stall #s are correct though. It stalls at 5550 on the brake, trouble was, last year I started having trouble with the brake not holding on the line when stomping the loud peddle. Sooo i been footbraking it. I generally red light when i use the brake anyway. Yes, I can spell delay-box! i may have the brake problem fixed, thanks to you guys here in the forum. Dumbas# attacks kept me chasing my tail most of last season. Not to make excuses, new engine, new fuel, new induction, huge case of brain farts, all my own fault mind you, I was a mess. This year I AM going to sort this out, I shall not settle for less. My typing finger is sore, is it possible to have carpel tunnel finger syndrome?THANKS EVERBODY!

[phantasea466]

What mph do you run through the 1/4? 5-15 mph less than others? I'm assuming 140mph and you are running 125 or 130?

[suicidebomb]

132-135, most door slammers here run 140-145.

[Oldewalnut]

[quote="zipper06]
I run 5.43 gears with a 3200lb car 1.41 60' and run 124.85 1/4 with 14X32 tires. someone told me about 1 hr ago i can't run the QTR. with 5.43 gears, i said come watch. What RPM am i crossing the finish line, i don't know, probably 7500/7800, but it's still there for next round if i win.

quote]

Can't run 5.43's in the 1/4, HMMM?

Well, 20 years ago, my ChevyII, 336ci, Lunati roller, 750 carb, Brodix heads, steel crank, steel rods, speed pro pistons, TCI powerglide, 8" converter, 3300 lb car w/driver, 5.67 rear gear, 14x32's ran 10.90's @ 122 all nite long. Ran that combo for about two seasons before we quit racing. It would run 6.7's in the 1/8. Still have it all.

I'll give an even more insane combination. In the late 70's, I ran a stock 67 Mustang, used a good top loader 4 speed, had a Weber pressure plate, Hays clutch, Weber 50lb flywheel, 57 Ford 9" rearend with a 5.67 gear. It ran low 8's in the 1/8 mile with 10.5x 28 slicks. Car left hard, did run out of rpm on the high end, LOL!

I plan to do a somewhat similar set up with a later model Mustang, only plan to use an automatic with a 9/10" converter, if I can ever score one I like. Probably dial the gear back a bunch, don't believe the 8.8's go quite that deep, yet.