suspension and ignition setup need help

Keith 944 · 08-13-2016, 05:11 PM

Sneeky pete

Larry Hill · 08-13-2016, 08:59 PM

Four wheel scales? 50/50 or better? Just some things to think about.

HandOverFist · 08-13-2016, 09:35 PM

After giving this some thought I maybe would be inclined to look to the other end of the track instead of beating a dead horse....err, tire I mean.

Ronnie Hamlin · 08-14-2016, 08:41 AM

Do they check your tires other than size? Some companies sell products to rejuvenate your tires. Think about that and let it "soak" in.

Robert Simpson · 08-16-2016, 04:21 PM

Can you retard the cam any? If so try that and bring the timing in more aggressive. Larger "worked on" intake, delay the secondary slightly on the carb. Also, I would try a 7" rim. By the picture the tire looks like it is starting to run over itself like it is to low on air. But, I know you do that to try and hook. The other way would be to put a 4.30 gear in it and let that hook and then try to be more aggressive with the timing and use more torque through the trans low gear setting. Also, do you have a soft hitting converter? By the way that is FLYING! for anything much less a very stock appearing car. Like everyone said testing, testing, testing. Keep up the good work.

chasracer · 08-19-2016, 08:31 PM

I raced one of these cars about 20+ years ago. It was a 331 small block, TH400 and 5.13 combination.

If you take a side view of your car and draw the imaginary lines through the rear control arms you will find the instant center of the car probably about 6-8 feet in front of you, maybe more. The IC needs to be about where the engine block/trans come together or at worse the front of the engine.

According to the rules, you might be able to do the following. The UMI adjustable upper links really don't do much more than adjust the pinion angle, kind of like the upper link in a ladder bar car. So, if you can find another upper control arm - you only need one, cut it in half, mount the half to the rear and then have your stock arm mounted in front to the frame and bring it down on top of the half. Tack weld it there, do the other side and then pull them out to weld them up. Put these in and you just moved the IC where you need it with "stock" parts. I think you will be very pleased with the 60' after this modification.

Larry Merk · 08-20-2016, 12:15 AM

We downloaded this MicroSoft Excel file which was a big help in understanding, and getting the rear edge geometry set up in our 81 Malibu. All instructions are in the file. Measure the end point locations of all rear control arms and enter them in the spreadsheet. It will then calculate and graphically depict the Instant Center location and several other critical dimensions. You can then alter the numbers to see what you need to change to arrive at the Instant Center you desire. Good luck.

www.patooyee.com/calculators/4BarLinkV3.0c.xls

08-13-2016, 05:11 PM	#1
Keith 944 VIP Member Join Date: Feb 2006 Location: Dela-where? Posts: 2,193 Likes: 1,161 Liked 1,877 Times in 577 Posts	Re: suspension and ignition setup need help Sneeky pete __________________ KEITH MAYERS 2-1/2 X somebody Still many X nobody

08-13-2016, 08:59 PM	#2
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,641 Likes: 1,940 Liked 10,714 Times in 2,230 Posts	Re: suspension and ignition setup need help Four wheel scales? 50/50 or better? Just some things to think about. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

08-13-2016, 09:35 PM	#3
HandOverFist VIP Member Join Date: Oct 2013 Location: Gulf Breeze, FL Posts: 1,651 Likes: 8 Liked 33 Times in 16 Posts	Re: suspension and ignition setup need help After giving this some thought I maybe would be inclined to look to the other end of the track instead of beating a dead horse....err, tire I mean. __________________ Rich Taylor I/SA - 321

08-14-2016, 08:41 AM	#4
Ronnie Hamlin Member Join Date: May 2005 Location: Chalybeate Springs, N.C. Posts: 131 Likes: 18 Liked 29 Times in 8 Posts	Re: suspension and ignition setup need help Do they check your tires other than size? Some companies sell products to rejuvenate your tires. Think about that and let it "soak" in.

08-16-2016, 04:21 PM	#5
Robert Simpson Senior Member Join Date: Aug 2004 Location: Jacksonville, Florida Posts: 808 Likes: 7 Liked 20 Times in 12 Posts	Re: suspension and ignition setup need help Can you retard the cam any? If so try that and bring the timing in more aggressive. Larger "worked on" intake, delay the secondary slightly on the carb. Also, I would try a 7" rim. By the picture the tire looks like it is starting to run over itself like it is to low on air. But, I know you do that to try and hook. The other way would be to put a 4.30 gear in it and let that hook and then try to be more aggressive with the timing and use more torque through the trans low gear setting. Also, do you have a soft hitting converter? By the way that is FLYING! for anything much less a very stock appearing car. Like everyone said testing, testing, testing. Keep up the good work.

08-19-2016, 08:31 PM	#6
chasracer Junior Member Join Date: Oct 2015 Posts: 14 Likes: 3 Liked 0 Times in 0 Posts	Re: suspension and ignition setup need help I raced one of these cars about 20+ years ago. It was a 331 small block, TH400 and 5.13 combination. If you take a side view of your car and draw the imaginary lines through the rear control arms you will find the instant center of the car probably about 6-8 feet in front of you, maybe more. The IC needs to be about where the engine block/trans come together or at worse the front of the engine. According to the rules, you might be able to do the following. The UMI adjustable upper links really don't do much more than adjust the pinion angle, kind of like the upper link in a ladder bar car. So, if you can find another upper control arm - you only need one, cut it in half, mount the half to the rear and then have your stock arm mounted in front to the frame and bring it down on top of the half. Tack weld it there, do the other side and then pull them out to weld them up. Put these in and you just moved the IC where you need it with "stock" parts. I think you will be very pleased with the 60' after this modification.

08-20-2016, 12:15 AM	#7
Larry Merk Member Join Date: Aug 2010 Location: Kennewick, WA Posts: 213 Likes: 46 Liked 314 Times in 113 Posts	Re: suspension and ignition setup need help We downloaded this MicroSoft Excel file which was a big help in understanding, and getting the rear edge geometry set up in our 81 Malibu. All instructions are in the file. Measure the end point locations of all rear control arms and enter them in the spreadsheet. It will then calculate and graphically depict the Instant Center location and several other critical dimensions. You can then alter the numbers to see what you need to change to arrive at the Instant Center you desire. Good luck. www.patooyee.com/calculators/4BarLinkV3.0c.xls __________________ Larry Merk

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