Needing setup information on 2010 mastersbilt by mars late model

[Hoyt3383]

I am needing setup information for my mastersbilt by mars late model. Was told to speak with Cody Mahoney and need contact information for him. Any help would be appreciated

[MasterSbilt_Racer]

Your other thread says it is different than a Smack down. How so?

[Hoyt3383]

Was told by mastersbilt that mars moved a bunch of stuff around on my type of car. And that I needed to talk with mars. Called mars and they said they couldn't get me and paperwork/ setup information on the car.

[MasterSbilt_Racer]

Was told by mastersbilt that mars moved a bunch of stuff around on my type of car. And that I needed to talk with mars. Called mars and they said they couldn't get me and paperwork/ setup information on the car.

I know they shipped to Mars with some of the mounting points out of the car. But don't know all the details. No details from the previous owner?

[billetbirdcage]

I know they shipped to Mars with some of the mounting points out of the car. But don't know all the details. No details from the previous owner?

I think they was sent to Mars with no cross member and no 4-link mounts, but there could be other things as well. I don't remember dates but 2010 would likely be too late or one of the last masters by mars as they started building Mar's cars around that time. I guess it's possible they still did the masters by mars for a while after they started building the Mar's cars so......

I'm just not sure of the exact time line on those cars but to me it's possible it's older or a mars car.

[Hoyt3383]

Chassis number 01989M.

[Hoyt3383]

Someone has to know about this car . I need ride heights, spring rates, jbar length and rearend location. Jbar height on frame and pinion. 4-bar locations (which holes on the chassis. Has the 7 hole 4bar brackets under it. Round tube overrail car. Wants to pack the LF wheel and wants to spin out and blow the rear tires off of it.

[MasterSbilt_Racer]

Someone has to know about this car . I need ride heights, spring rates, jbar length and rearend location. Jbar height on frame and pinion. 4-bar locations (which holes on the chassis. Has the 7 hole 4bar brackets under it. Round tube overrail car. Wants to pack the LF wheel and wants to spin out and blow the rear tires off of it.

3 wheel and spin out?

[Hoyt3383]

Yes. And spinning the rear tires bad. Even on restarts

[Matt49]

Something not adding up here. Toting the LF is not accompanied by wheel spin.
New driver by chance?

[Hoyt3383]

No not a new driver. Car has 147lbs bite. Jbar is 9 1/2 up on frame bottom on pinion mount. LF 500, RF400, LR200, RR 250. 5th coil 325 spring. When ever I'd drive the car into the corner on the throttle it would dump on the RR , and couldn't get back on the throttle the way I needed to before it would spin out. On restarts car would kick out the RR and spin the rear tires

[LRtireCHANGER]

Does the car turn into the corner ok? 400# spring on the rf seems to heavy. If the rf is too heavy, and the car does not roll over on the rf and stay there through the middle of the corner, it is going to three wheel on exit. This sounds like a tight car that is not turning in very well.

[MasterSbilt_Racer]

Does the car turn into the corner ok? 400# spring on the rf seems to heavy. If the rf is too heavy, and the car does not roll over on the rf and stay there through the middle of the corner, it is going to three wheel on exit. This sounds like a tight car that is not turning in very well.
All his springs are in range for a smack down car with a vanilla setup from that timeframe.

[Hoyt3383]

Kinda tight getting in. I'm needing some help on spring rates, ride heights, 4 bar locations, jar lenght and heights

[MasterSbilt_Racer]

Spins out before you pick up gas, but tight in? Wheel spin, but 3wheeling? I can be no help here.

[Hoyt3383]

Spins out on the gas

[Hoyt3383]

Spins out before you pick up gas, but tight in? Wheel spin, but 3wheeling? I can be no help here.I pm'ed you

[MachineMasters]

smh @ Mars.. it's not rocket science. What are the chances you'll ever buy anything from them now that they've been zero help? The info below took about 2 minutes to type.

Can't help with the 4-link locations - never had a Masters with 7 hole brackets. At full droop you want the left top link to be around 47 degrees. If you get too much upper left bar angle, the back of the car will want to jump out on restarts.

17.5" upper links, 15.5" lower links. Can lengthen both leftside links 2 turns and shorten RS links 2 turns to tighten the car some.

springs and bite # sounds normal.

3 3/4" LF ride height
3 5/8" RF ride height
7 1/2" RR ride height
8 1/2" - 9" LR ride height

54.5 - 55% LS
54.5 - 55% R
with driver

I forget the LR chain measurement.. I think at full droop you want to be about 12 5/8" to 12 3/4" from the top of the LR tube to the bottom of the LR frame rail.

As for what the car is doing now.. what length j-bar? Does it mount to the center of the bar on the frame side? If not, it should.. I think 21" long j-bar is needed for that.

[Hoyt3383]

21" jbar it center of the square tubing that the frame mount bolts to. 9 1/2 inch up measuring from the bottom of the chassis to center of the bolt. Bottom of the pinion ( about 2" below the center of the u joint

[MasterSbilt_Racer]

Way too much j bar. Go to 8.5 on chassis and more like 1/2" below pinion.

[MasterSbilt_Racer]

Get your bar angles so that RR upper is around 20 degrees. RR lower 0 to plus 3. LR upper 25 range and LR lower 7ish. I ran drop where axle to underside of frame rail was 13.5"

If you have 33"/35" rear, inside of torque arm plate to center of RR frame rail is 16".

[Hoyt3383]

Will do. Appreciate you

[Hoyt3383]

What should side to side be measuring from the 5th arm bracket to the center of the RR frame rail?

[Hoyt3383]

How much bite to start with?

[MasterSbilt_Racer]

I would leave your springs and scale numbers where they are for now.

[Hoyt3383]

Thanks. I'll keep you posted

[TheJet-09]

And if it has S-7 spindles by chance, the front ride heights are then 3 1/2" on both sides. I have/had an '07 Mars Smackdown and learned that taking LR weight out (bite) had a much better effect on side bite (and overall traction off) than moving the J-Bar/adding angle. Don't be afraid to get down to 50-80# of bite. They also have a lot of RR trail built into the mounts (RR is about 3/4" farther back than the LR at ride height). So don't be afraid to move the LR way back (I ran LR links that were 1/2" longer than what it calls for. I heard Babb ran the LR 1" further back when he was in a MasterSbilt). By comparison, look at where the LR wheel is in relation to the wheel opening on some of these Rockets and Club 29 cars when they go out for the feature. You'd think something was broken on the rear suspension!

[a25rjr]

We never ran that heavy of fifth coil either, usually 275/300.

[MasterSbilt_Racer]

We never ran that heavy of fifth coil either, usually 275/300.

I never ran that light.

[MasterSbilt_Racer]

A 2010 Smackdown can come off the corner. Watch the 33 win the race.

https://www.youtube.com/watch?v=24f2RtJ3ppc

[Hoyt3383]

Found two problems. 1) bent RF spring,2) RF shock didn't have and has in it . Also the jbar being to high on the chassis

[MachineMasters]

Found two problems. 1) bent RF spring,2) RF shock didn't have and has in it . Also the jbar being to high on the chassis

Personally, I think the j-bar height was okay.. but I always ran D55 tires in my Masters.

300lb 5th coil with 1/4 - 3/8" preload is what I ran.

If it has S7 front suspension, I'd still cheat the RF ride height up a little bit... I was upwards of 4 1/4" RF ride height with a 400/700 stack. Was the only way I could get enough travel without digging the cross member or front strut bolt into the ground.

[Hoyt3383]

Running Hoosier 1350's. has regular smackdown spindles on it 660hp, integra ida's, steel block brodix heads.

[MasterSbilt_Racer]

Personally, I think the j-bar height was okay.. but I always ran D55 tires in my Masters.

300lb 5th coil with 1/4 - 3/8" preload is what I ran.

If it has S7 front suspension, I'd still cheat the RF ride height up a little bit... I was upwards of 4 1/4" RF ride height with a 400/700 stack. Was the only way I could get enough travel without digging the cross member or front strut bolt into the ground.

We typically ran the shorter bar. But, it is easy to replace the rear suspension with the j bar on those cars.

[a25rjr]

A 2010 Smackdown can come off the corner. Watch the 33 win the race.

https://www.youtube.com/watch?v=24f2RtJ3ppc

That's what we had. Remember, Im in the south with all that sand!

[Hoyt3383]

Car looked good in the video buddy.

[Renegade Cust Susp]

A 2010 Smackdown can come off the corner. Watch the 33 win the race.

https://www.youtube.com/watch?v=24f2RtJ3ppc

Having a good wheelman never hurts the cause either.

[MasterSbilt_Racer]

Having a good wheelman never hurts the cause either.

Certainly not. Lol. Especially when you are missing quite a bit of other stuff that you have to have $$ for.

[Matt49]

Definitely WAY too much j-bar angle. Go with what MasterSbilt_Racer suggested. My guess is that you are way too tight getting in and having to pitch the car in the center. Which is causing you to have no remaining traction to get off the corner. The excessive j-bar angle is the reason the car is falling on the RR and thus toting the LF.
Front ride heights for a standard smack car depend on which style spindles you're running. The numbers MachineMasters provided are for the original smack spindles. Almost anybody that ever ran a smack car past 2010 eventually ended up on the S-7 front end. The car will turn much better. That being said, I'm not sure the exact differences in the MB by Mars. To Machine Masters point, that's a real crock that they won't provide even the most basic starting points for you. I can understand not doing R&D on older stuff but they should at least have some setup sheets laying around.

[Hoyt3383]

No information what so ever. I've talked to them 3 times and said they would see if they had anything they could email me, and NOTHING!. I was able to get ahold of the original owner of the car who won a ton of races in it and he still has all the notes and information on the car. He is supposed to be calling me back tonight

[racer2e]

He is right though. I called Chris Mars about 6 months ago and asked about the Birkhofer spindles. He told me he had never heard of them and had no idea what I was talking about and didn't remember anything about when they ran Masterbilts. He was willing to sell me an MB customs car. I told him I had never heard of them.

[a25rjr]

I never ran that light.

On our 2008, we usually ended up on a 325-350, in the first hole, come feature time. It seemed to really help that year of car. Of course, no one was adjusting lr hike at that time. That car responded real well to indexing the lr birdcage as well.