suspension and ignition setup need help

marina blue · 08-13-2016, 10:03 AM

The class is run heads up with a sportsman ladder. .400 pro tree. My combo is a "stock appearing" 360hp automatic with a turbo 400 and 4.56s. The motor made 660 on the engine dyno running through the stock exhaust manifolds, correct oval port heads, and cast iron intake which uses a holley. The car weighs 3845 with me in it. The dominant cars are hemi mopars and L89 69 camaros and novas. I feel the front of the car works well but the rear is where I could use the expertise of someone else. As well as getting full use of the MSD.

Alan Roehrich · 08-13-2016, 10:30 AM

What do they allow on the rear suspension?

Woodfin · 08-13-2016, 11:04 AM

your performance is commendable giving the information posted.

If you can get to the point where it will leave without retarding time, that will be a big part of reaching your goal.

Have you tested with fixed timing? If not, try and see what happens.

HandOverFist · 08-13-2016, 12:49 PM

Agreed - Without a tire swap the only other thing I can think of as far as suspension are no-hop brackets...https://www.summitracing.com/parts/qa1-5213/overview/

These were used on my partner's '66 with success for a 1.51 60'...he had less hp and was closer to 4000 pounds, but did use slicks for those runs. Unsure with those tires what the outcome of a higher stall converter would net.

Is this you at the 2:19 minute mark?

marina blue · 08-13-2016, 01:49 PM

No hop bars are allowed. not much else. Trying to leave with full bore timing blows to tire away.Adding weight ballast in the trunk has been suggested but putting an extra 200 lbs in the trunk and dragging it down the track is a tough pill to swallow.I know the digital msd is capable of ramping in timing in different ways I'm just not sure of all the things its capable of. Rear shock settings are another area where I know someone with more knowledge could be helpful.

Mark Yacavone · 08-13-2016, 03:19 PM

It sounds like you are running an automatic..

In this case, the rules (as posted here), leave a lot of room for experimentation.
What do the fast guys use? 400?, 2.20 low gear?, 350? ..Aluminum drums (I'll bet they do..How about a Powerglide?

Converter rule is wide open..Again, what do the fast guys use?

marina blue · 08-13-2016, 03:55 PM

Yes. That was last summer at englishtown. Much appreciation for all the responses so far.

marina blue · 08-13-2016, 04:08 PM

Wow. lots of feedback here. Front springs are Santhuff 250lb. rear springs are stock. Front shocks are QA1 single adj. Rears are QA! double adj. Adjustable upper arms are technically not within the rules but are not enough of an infraction that anyone complains. 6 inch rims are all that's allowed but most racers run 7s. The basic premise of the class is that the cars appear stock to the casual observer. I'm running a turbo 400 with a 2.10 first gear with all light weight internals as well as a 12 bolt with 4.56s with a spool and gun drilled axles.

HandOverFist · 08-13-2016, 01:41 PM

Quote:

Originally Posted by Alan Roehrich

What do they allow on the rear suspension?

http://www.supercarraces.com/2010rules.html

Alan Roehrich · 08-13-2016, 01:49 PM

Quote:

Originally Posted by HandOverFist

http://www.supercarraces.com/2010rules.html

According to those rules, his upper arms are not legal.

13.01 Traction devices are limited to hop stop bars for upper control arms on coil spring cars.
13.02 Upper and lower control arms on coil spring cars must be correct.

From his OP: In the rear UMI adj. uppers, boxed lowers stock springs and sway bar and double adj QA1s.

So, evidently, the rules have changed.

08-13-2016, 10:03 AM	#1
marina blue Junior Member Join Date: Aug 2016 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: suspension and ignition setup need help The class is run heads up with a sportsman ladder. .400 pro tree. My combo is a "stock appearing" 360hp automatic with a turbo 400 and 4.56s. The motor made 660 on the engine dyno running through the stock exhaust manifolds, correct oval port heads, and cast iron intake which uses a holley. The car weighs 3845 with me in it. The dominant cars are hemi mopars and L89 69 camaros and novas. I feel the front of the car works well but the rear is where I could use the expertise of someone else. As well as getting full use of the MSD.

08-13-2016, 10:30 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,124 Likes: 1,581 Liked 1,876 Times in 422 Posts	Re: suspension and ignition setup need help What do they allow on the rear suspension? __________________ Alan Roehrich 212A G/S

08-13-2016, 11:04 AM	#3
Woodfin Senior Member Join Date: Sep 2006 Location: Kilgore TX Posts: 540 Likes: 8 Liked 288 Times in 109 Posts	Re: suspension and ignition setup need help your performance is commendable giving the information posted. If you can get to the point where it will leave without retarding time, that will be a big part of reaching your goal. Have you tested with fixed timing? If not, try and see what happens.

08-13-2016, 12:49 PM	#4
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 Agreed - Without a tire swap the only other thing I can think of as far as suspension are no-hop brackets...https://www.summitracing.com/parts/qa1-5213/overview/ These were used on my partner's '66 with success for a 1.51 60'...he had less hp and was closer to 4000 pounds, but did use slicks for those runs. Unsure with those tires what the outcome of a higher stall converter would net. Is this you at the 2:19 minute mark? __________________ Rich Taylor I/SA - 321 Last edited by HandOverFist; 08-13-2016 at 01:26 PM.

08-13-2016, 01:49 PM	#5
marina blue Junior Member Join Date: Aug 2016 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: suspension and ignition setup need help No hop bars are allowed. not much else. Trying to leave with full bore timing blows to tire away.Adding weight ballast in the trunk has been suggested but putting an extra 200 lbs in the trunk and dragging it down the track is a tough pill to swallow.I know the digital msd is capable of ramping in timing in different ways I'm just not sure of all the things its capable of. Rear shock settings are another area where I know someone with more knowledge could be helpful.

08-13-2016, 03:19 PM	#6
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,821 Likes: 2,912 Liked 5,133 Times in 1,957 Posts	Re: suspension and ignition setup need help It sounds like you are running an automatic.. In this case, the rules (as posted here), leave a lot of room for experimentation. What do the fast guys use? 400?, 2.20 low gear?, 350? ..Aluminum drums (I'll bet they do..How about a Powerglide? Converter rule is wide open..Again, what do the fast guys use? __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

08-13-2016, 03:55 PM	#7
marina blue Junior Member Join Date: Aug 2016 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: suspension and ignition setup need help Yes. That was last summer at englishtown. Much appreciation for all the responses so far.

08-13-2016, 04:08 PM	#8
marina blue Junior Member Join Date: Aug 2016 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: suspension and ignition setup need help Wow. lots of feedback here. Front springs are Santhuff 250lb. rear springs are stock. Front shocks are QA1 single adj. Rears are QA! double adj. Adjustable upper arms are technically not within the rules but are not enough of an infraction that anyone complains. 6 inch rims are all that's allowed but most racers run 7s. The basic premise of the class is that the cars appear stock to the casual observer. I'm running a turbo 400 with a 2.10 first gear with all light weight internals as well as a 12 bolt with 4.56s with a spool and gun drilled axles.