hp and 1/4 mile times

[crazy '71 demon]

i was wondering what my hp is probly going to be and my time in the 1/4 mile i have a 318 soon to have a mild cam older eddy performer holly 600 cfm soon to have a 727 stock stall mild shift kit and 27 in tall by 10 in wide tiers (street raidals) 2814 title weight what might i look for at the strip

[The Dartman]

I'd guess about 15 flat until I hear more about the motor and gearing.

Also, your 2814 Title weight is actually about 3200 actual weight.

Dartman

[crazy '71 demon]

iv got verry high gears (2.71) soon to be a posi thanks to a welder and im not sure about the motor im probly just gonna go a couple steps above stock i was guessing about 15.90 but 15 flat would be nice. and on a side note should i try to find a 8 3/4 or a dana for the demon
thanks

[DodgeBoy318]

Dont weld those spiders! If the guys at the track find out you wont be able to run (NHRA rules).

[6 packin]

A nice converter with a good suregrip and at least a 3.91 gear........you will see the seconds melt away!

[moparmotorman]

if you have the money to find and rebuild an A-body 8 3/4 rear great. if not you can find A-body 8 1/4 rears cheap, and set them up quite reasonably as well. they're definitely strong enough for a small block, but i wouldn't put it behind a worked 440.

[crazy '71 demon]

i can weld the spiders at my local track im just running the local gruge nights and the high school drags and i cant aford a new rear end at the moment (buyin the car killed my buget) but i kno if i run in a NHRA event i cant run with the spirders welded

[The Dartman]

Welded spiders are illegal at an NHRA track, not just an NHRA event. Unfortunately, they are usually found when they totally explode.

It's better to be a one tire willy, then to weld your spiders. This is like lighting a fuse that you don't know how long you have before it goes BOOM! Even street driving a spool is very very hard on axles in an 8 3/4, let alone it's weaker breathren with welded internals.

Is this a 7 1/4 or 8 1/4 rear? I assuming 7 1/4 which will take very little abuse before totally exploding. I like the 8 1/4 idea since they are easier to find than an 8 3/4.

Dartman

[crazy '71 demon]

how much do you think a 8 1/4 will cost me im goin to go ahead and weld em and see what happes i dont think ill make it out to the track with them but i might play with em for awhile but i do need to ko how much an 8 1/4 might cost or evean an 8 3/4 out of b body from 62 to 70 theres olny an inch of diffrence

[DodgeBoy318]

Just keep your eyes out for old junk cars or trucks...especially the big ones. Dodge vans and trucks (a few) have Dana60's but a lot of the trucks have bigger rears. They might be wide and stupid-looking...but once they see you run a 12.50 with em, they shut up REAL quick. I bought my 8 3/4 along with a big block 383 from a lady for $100. The car has no hope of running, thats why no one asked her. Just look at the cars that no one WANTS to look at...you might get lucky!

[perfmachst]

hello, do not weld the spider gears!!!! not only is it illegal, also very dangerous. If you break an axle, you will be into the wall very fast and crash. I would not run them on the street either.
welding spider gears went out when the flat head fords went.
If you need to hook up, add an air bag or shock to the right rear.
you can preload and make both tires hook.

[rustycowl]

I think 15 flat is borderline wildly optimistic. That is probably a good goal to shoot for, but I highly doubt you'll get there right off the bat. If everything is dead nuts ideal, you might get there with a streetable combination. You'll probably start out in the high 16's and as you learn, it'll improve.

[dwc43]

Welded spiders might be illegal in NHRA, but they work. And they hold up to the toughest racing around and that's dirt tracks. You want find many stock and super stock 400 horse 3400 lb cars not using welded spiders. I hate to say it, but I even used them when I started out. Main advantage swapping to the spool when money was available was that it has lighter rotating mass. Do as you please, just thought I'd give you this info since the welded gears are still widely used till this day.

[ehostler]

First off, welding the spiders is very stupid. If it doesn't break at the track, It will break when driving on the street. With street driving, the tires are going to howl around every corner, until something breaks. When it breaks, a tire and axle are going to leave the vehicle and you WILL plow into another car. Now you are taking other peoples lives into your own hands because you want to be stupid and refuse to listen to reason.

Also, are you honestly telling me that your mild 318 is burning the rubber on that peg leg with 2.71 gears. I honestly doubt that you are having traction problems with that gearing and engine.

[ehostler]

DW are you honestly telling me that you would be stupid enough to drive welded gear in a 7¼ on the street? If you didn't read everything, this guy plans on a lot of street driving.

I honestly wouldn't run a spool on the street. You are just asking for problems

[dwc43]

Nope not suggesting anything. Someone said no one does this, but in fact many do. I did it on a n 8 3/4. All chebby's run truck 10 what they call the big ten or the hard to find 12 bolts and fords run the 9 incher. 98 % of those are welded spiders. They hold up just fine under those exstreme conditions. At least on dirt tracks anyways.

[ehostler]

OK, just wanted to make sure...

[bbaspense]

Do yourself a favor and wait before getting out the welder...

There has to be someone on this board of 20 000plus members that has a sure-grip 8 1/4 for this guy... I would rather give him a deal on a rear end then to read his obituary in the paper..

Go to parts wanted section.. and put out the feelers for a rear end..

everyone will know you welded it.. when you turn the inside rear wheel will spin on the pavement and make nasty noises... you will wear out your front tires 'cause the car won't want to turn..

dwc43: I would think running a welded rear on a circle track car would really cause the car to push... it would 'cause you to think the cross weight or something else was wrong 'cause the car won't turn...it would want to go straight and plow the front tires... I'm sure most circle track guys ( at least nascar) run a locker differental or a standard clutch or cone type differential that still allow the inside tire to turn slower than the outside...

[dwc43]

Your thinking asphault, try thinking dirt were the car is slid thru the turns at 80 plus not driven thru with asphault finness. A dirt track driver makes a great asphault driver, but an asphault driver seldom makes a good dirt track driver.

As for a push we use stagger to turn the car. With the banking we run on 1 inch is enough. I have seen more used for flatter tracks and it depends if it's tackky or dry slick too. Look at a World of Outlaws sprint. Sevral inches difference in stagger on those rear tires . Dirt cars are also driven more by throttle and some brakes depending on track and driver style and car type.

As for Winston cup, they use a full floating 9 inch ford rear with a Detroit Loker. It's a ratchet type rear that turns loose very little in the turns compared to a surgrip. They also run staggered tires to help make it turn in the corners. LMS cars use spools in some classes with larger amounts of rear stagger. Just depends on tracks and rules and what classes you run.

[bbaspense]

dwc43: good explanation... I'm not that familiar with dirt cars..

[dwc43]

Not a prob. But if your a racinf fan you missing out. Just noticed where your from. Are there any dirt track type races up there?

[bbaspense]

There is a 1/2 mile dirt track about an hour from me and a 1/2 mile asphalt track only 30 minutes from me...

I was going to build a CASCAR Truck (canadian late model) pickup and try my hands at some toilet bowl racing.. but my sponsor wants me to drive his Drag Car... he's the boss and pays the bills so I'll stay in drag racing...

I spent a HUGE amount of time learning the fundamentals of stock car racing and was really looking forward to it... but I can always learn more...that's why I'm here...

People tell me not to start in the endurance classes 'cause there is no one to learn off of and it is really a big demolition derby... most said to start in Street Stock or the Truck series..

Maybe in a few years....

[dwc43]

Street stocks is a good place to learn. Less speed and trouble to get into and it is some what cheaper. Most important thing is to learn how to interpret the gray areas of the rule book.

I get Cascar reruns on Satt. in the off season here. I liked it. Real good racing. Ever need some help let me know. I'll try to answer your racing questions. I've been doing this for some time now. We are building some cars to run a Nascar track in Nashville. It will be a sportman division car. Tired of getting dirty ...