SLA Suspension vs MacPherson Strut
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- Опубликовано: 30 июл 2010
- Visit www.A-47.com
A quick explanation of the huge advantage that you get from installing the AGENT 47 Double A Arm suspension to replace your MacPherson strut type suspension. 
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After 2 hours of watching theoretical suspension video's i finally understand it completely after wachting this video! Theoretical movies are fun but imagening how the weels move when the body of the car (chassis) moves is kinda hard. This is a perfect video showing how the camber changes!
Thanks for the tutorial. I always knew SLA was better, but never really took the time to find out why. What you showed me in the vid will help me tremendously as I tweak my '66 Mustang and '87 Pontiac Fiero, especially the Fiero as I've always been dissatisfied with the fact that GM essentially bolted the front end of a Vega into the rear. Definitely been looking to bring it into the 21st century.
No. This system keeps the front tires flat during suspension travel which creates much more grip than the strut type suspension. It DECREASES the potential for understeer. Keep in mind that understeer is a result of many factors and some of those factors have nothing to do with front suspension. It's all about balance and this system has proven to be an extremely useful tool for getting a mustang balanced very nicely.
I noticed that after you mentioned it. Some better pics for our website will be added soon. Thanks!
@Kyu1LL- GT500's are notoriously heavy. An SLA suspension is lighter than stock and greatly improves the geometry as shown in the video. SLA will give your Mustang much more European type handling. We'd also recommend a rear coil over kit to make the full car balance out.
The only real way to know if it works is by comparing lap times. How much is one gaining in a 20 minute session? Why are Porsche's still coming out with McPherson setup?
@Firebert79TAOur SLA system can run less static camber because our camber gain increases faster than a strut (both negative and positive). We run less caster than struts as well.
@Kyu1LL- SLA for S197 Mustang is $3,500 + rear is $2,500. We are working on updating the kits for 2011+ Mustang with the new steering rack.
what suspension upgrades would you recommend for a DD 2012 GT500? I might take it to the track (drag and course, possibly drift attempts) occasionally. I know the minimal amount about American cars and LRA in general (except the basics)
How would this improve grip/performance on a mid engine car (like mr2) with MacPherson setup?
Ok Brian you talked me into it gimme a few month and ill order one for my 2000 Laser Red Mustang :)
looking forward to it
@agent47racing cool... how much does that run?
It's absolutely positively a double A arm set up with an A on the top and bottom.
super great explanation!!!! awesome!!! i will switch my car to agent 47
what was the camber setup on the sla car?
@raulgs90- Our suspension is made for Mustangs only at this time.
@6SpeedSilverado I showed it at 2:33. It's 1.6
thanks couldnt tell in the video or on the website
Same way it does on Mustangs. Proper suspension geometry doesn't deliver negative results...
I can't tell in the video or on the website is the bottom arm an a-arm? it looks more like an L arm with only one mounting point on the frame. If its anything like the stock lower arm then it s not a real a-arm.
I see, now would you be able to create one for a car I have in mind?
if you watch suspension cam videos though the inside tire will have almost no force on the ground, sometimes hovering over the ground. there doesn't seem to be much point taking the effort to get it flat when it doesn't even touch the ground. the only benefit I see is in braking.
Its ok if you don't see the benefits. No disrespect, but when a driver gets enough experience and skill from actually road racing a Mustang they get to the point where the car is actually holding them back from going faster. (New/inexperienced guys always think its the car but its always the driver till they really get the skill)...Only then will they actually need an SLA and through experience, they will understand what benefits an SLA really offers.
Its been proven may times and with many wins that our SLA has a multitude of benefits that result in better tire lifespan and faster lap times. Be that through better braking, or increased contact patch on the inside tire... Its really a moot point since we no longer sell SLA systems to the public.
So why do most street cars and family cars are fitted with McPherson struts instead of Agent 47 ?
MacPherson strut design is simpler, cheaper, and easier to install and align at the factory. SLA has many more adjustment points and requires more parts. Something that costs $1.00 more for a factory to buy can get into HUGE money when you put 2 on each car and you are making 500,000 cars..
Thank you very much for answering...and one more question... Is SLA just good for using at the tracks or is it also good for using at normal bumpy streets and roads ?
A good SLA suspension will have improved geometry and use springs with a lower rate than a strut setup. for example, a 400# spring on our SLA would be equal to something like a 750-800# spring on a strut car. End result is, better ride quality and grip without hammering the car over bumps.
I'm looking into one of these beauties for my 90 GT coyote swap. Just have to put the money together:)
I guess the competition would be Griggs and Cortex. How would your system differ from theirs for the S197? I think Griggs is 200+ pounds lighter than stock in the front and apparently has lifetime warranty.
+Richard Shih- It's a non-issue at this time since AGENT 47 isn't currently marketing SLA systems (downsizing and refocusing). Note that 2 different AGENT 47 cars hold the 2014 & 2015 West Coast American Iron Championship titles : )
Keep in mind that buying a suspension (or anything really) is one thing, and after sale customer service is another. Feel free to google "__________ customer service sucks" for each of the companies you mentioned above and see which one you feel most comfortable with. The after sale service and support are just as important as the engineering and manufacturing processes.
Which answer are you referring to?
Good info Filip.
I see.
@agent47racing please do
this system creates understeer on fast curves?
So the SLA system doesn't need to run as much static negative camber. I was hoping this video would say how it achieves this. I'm guessing it just has a more appropriate camber gain curve than the Macpherson strut setup. Is the caster or steering axis inclination much different between the setups?
Also, go Ryan! . . . that notch Mustang is so cool.
Still having agent 47 suspension is still limited by a lot thanks to the mustangs keeping the solid rear axle in the back. All this means is that the front end will be able to pull in way better and that's great and all but did you forget that if you are putting more power down (which most guys do adding a supercharger or whatnot) that rear end is going to slide out. I can only see this effective on the drag strip. Then again you can probably see better results in certain model mustangs like the Roush
We hold the American Iron National Championship titles for 2014/2015/2016 with 2 different AGENT 47 SLA equipped cars that both use solid rear axle. It's all about the setup and of course, if a driver knows how to control the direction of the car with throttle steering and technique (skill) there really isn't an issue. The only benefit to having an SLA or any other high end suspension system on a drag strip is the weight savings. Most successful drag cars are using stupid little tires on the front end that do less than shit when its time to turn. They don't even use this tires for braking since they have parachutes.
Only if the car you have in mind is a Mustang.
Lap times depend on driver and other factors but I'd say 5 sec per lap at least if we did a back to back comparison. Porsche still puts the motor in the wrong place. They still use the same shape as they did in the 60's. They've done everything they possibly can to milk the same architecture for 40+ years. Sure there are fast variants of the 911..There's very little weight on the front end of a Porsche which has it's own set of problems that are totally different from a front engine Mustang.
I could also just email them to you if you want to email me bryan@a-47.com
Ok Brian you talked me into it gimme a few month and ill order one for my 2000 Laser Red Mustang :)