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Author Topic:   Need forward bite on metric car!!!!!!
ALCOHOL
Dirt Full Roller

Total posts: 46
posted July 16, 2003 05:18 PM  
I have a '79 Monte with the following,,,,,LF,,1000#,,76 shock....RF,,1100#,,76 shock....LR,,225#,,,94....RR,,200#,,94,,,Car has to weigh 3000# and right now has 53% rear,,52% LS,,,,,We have to run stock radial tires,,,In feature the car has very little forward bite..I lnow my engine is not that good to spin them very easy,,pretty stock 355 with a stick shift,,HELP

PEDDLER
Dirt Freak

Total posts: 446
posted July 16, 2003 06:13 PM  
Check pinion angle...5 to 8 deg down.

Eljojo
Dirt Forum Champ
Total posts: 968
posted July 16, 2003 09:33 PM  
Soften the rear springs! Check very closly for a mistake you may have made in fabricating the metric four link. If your upper arms are too short...get the angle finder out and look at the lower arms. You may want to work on the brackets yu've put on the rear end. You want the lowers running uphill to the front. Get that ride height up and the mounts low. When you nail the throttle you want the car squat on the springs while pushing the lower control arms upwards-lifting the car.

WOODDOG
Dirt Roller

Total posts: 5
posted July 16, 2003 09:46 PM  
ELJOJO WAS RIGHT ,BUT I THINK YOU REAR SPRINGS ARE FINE IF YOUR RIDE HT IS CORRECT. REMEMBER YOU'VE GOT A 3000 #plus CAR . I THINK THE SPRINGS ARE FINE FOR REAR EXCEPT YOU NEED TO DO WHAT HE SAID ON YOUR TRAILING ARMS ! GOOD LUCK . MY CAR ,IS A 79 MALIBU , AND I DONE THE SAME EXCEPT I USE A 11 1/2 INCH REAR SPRINGS, SAME WEIGHTS AS YOURS AND IT FLIES.. KEEP EYE AND ANTI SEIZE ON THE BUSHINGS, COME HOME SUNDAY, WASH AND RE- LUBE ! & BEAT THE DENTS OUT HAHA

ALCOHOL
Dirt Full Roller

Total posts: 46
posted July 17, 2003 09:34 PM  
First off I was wrong on rear springs,,,they are 150 and 200. It now has 3" of spring compression. Springs measure 8-I/4" setting on ground. New ones are 11-1/4" at free hght. I was thinking about stiffing rear springs a little to raise the rear of car. What is a good ride hght on rear? I now have 8 deg of pinion angle. It has fabricated brackets on top of rear end to mount trailing arms(FORD). They measure 1" higher than stock bracket hght. The lower trailing arms are level and the top arms are at 15 degrees. The car sets downhill in rea if you measure frame hght on all four corners from floor to frame. See what you think about it now,,Any help PLease..

Eljojo
Dirt Forum Champ
Total posts: 968
posted July 18, 2003 10:07 PM  
When you set your ride heights, start at the left front. On a metric, measure from the frame to the floor right where it turns out. You'll want to start with the lower control arms +/- level. I like the left side running ever so slightly uphill and the right dang near level. You can get there if you set the right side an inch higher than the left. With the soft springs you've got I would like to see the left rear one inch higher than the right front, and the right rear an inch higher than the left rear. Put it on a set of scales and work on all four corner weights at the same time. A touch here and a tweek there and your ride heights won't stray too far from their original settings.
If you don't have acesss to scales, then you'll have to use the old tried and true method of placing a socket on a jack and raising the rear tires off the floor. You want the right side to be off the floor about three inches before the left side clears the floor. It's kinda "caveman" but a lot of races have been won using that method! Oh and if your punkin isn't in the center of the car......well go find some scales!

rico 08
Dirt Forum Champ
Total posts: 1139
posted July 19, 2003 12:58 PM  
You don't want the upper mounts any higher than the stock mounts,i tried the anti-hop bars that mount the upper bars higher to help bite but it made the car very loose,they work on a drag car but not on a dirt car,they just lock up the rear suspension under squat,if you mount the arms higher on the top it will do the same thing.

ALCOHOL
Dirt Full Roller

Total posts: 46
posted July 20, 2003 03:49 PM  
Eljojo,,,,this car doesn't have weight jacks, so ride hght. is hard to do. Also, I don't see how you can put a 9" Ford rear end it the car with out having top brackets higher than original rear end. Fords are taller than OEM GM rears. I will try to work on rear lower trailing arm angles this week. thanks anyway,,

ALCOHOL
Dirt Full Roller

Total posts: 46
posted July 27, 2003 12:07 PM  
Changed the lr trailing arm angle to 17 deg downhill to rearend and made some weight adjustments. Car was a lot better this week and the track was a lot drier. Won the heat and dash, but tranny let go at end of dash, so I'll try again this week,,,,,Thanks for the help.

rico 08
Dirt Forum Champ
Total posts: 1139
posted July 28, 2003 04:12 PM  


 
Try this.......

3dracer
Dirt Full Roller

Total posts: 32
posted July 28, 2003 04:43 PM  
That would be nice but we aren't allowed to do that. They would really scream at us if we did that

rico 08
Dirt Forum Champ
Total posts: 1139
posted July 28, 2003 05:36 PM  
Do you think so?There was a post 'while back about the GNX torque arm,just thought i'd show everyone.

mikehaze
Dirt Full Roller

Total posts: 39
posted July 28, 2003 08:12 PM  
that would not fly at all,it has to be put in just like the GM rear end came out.I'll save that for next year though.

fast_crew
Dirt Forum Racer

Total posts: 99
posted August 09, 2003 09:38 PM  
Is that the stock susp. or is that an aftermarket upgrade?? Where are the parts available??

Thanks Josh k

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 10, 2003 02:05 AM  
thats 100% stock for a buick gnx boys get yourself a regal body and tell um to go eat a big sheet sandwich lol but to buy that kit is like 1500 bucks

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