Drag Suspension???

[mlee]

Originally Posted by Supercharged SS

Besides trailing arm my cars suspension in all stock. My car has no trouble at the track.

^^^^ This^^^^ the fastest 60' car we have here 1.54 is totally stock with only the JRE posi mod... It's an auto of course... Lowered cars have problems because they don't squat enough on launch so do coilover if you do lower it.

[JusticePete]

Originally Posted by Caliman93230

Here is the million dollar question, should I lower my car or leave it stock height it if I want to get better drag times

The easiest way to improve your drag times is to get a good strip alignment. Keeping your tire contact patch square to the track is mission critical. The lower you go, the more difficult it is to dial out negative camber. The best drag alignment will have your rear cambers set to zero or a touch positive so when you car squats on launch you have optimal contact between the tire and the track.

For lowered vehicles, you'll want to use Pedders extended range rear camber eccentrics. With the extended range camber bolts you'll get closer to the optimal setup.

While we are talking about drag launches we should talk about the IRS bushes. Keeping the IRS secure under hard launches become more of a challenge as you increase RWHP RWTQ and use drag radials or slicks. They all increase load and increase the movement of the IRS. Movement in the IRS equates to lost energy and slower times.

It always comes back to the foundation of the ZETA II. Sub-frame bush inserts are a must have for even the most casual drag racer. As the RWHP and tires improve you should be moving up to full sub-frame bushes and at the top of the food chain Pedders Delrin for the Street EP1201HDs. Our testing and experience with some custom GM vehicles confirm what we knew at first glance -- the next most critical bushes are in the toe links. Replacing the toe link bushes with Pedders EP7323 bushes brings an significant increase in stability under acceleration load.

Moving deeper into the IRS we would change out the differential bushes going straight to the EP1167HD. Your OE differential is now rock steady.

A monster rear sway bar is the next step. The Pedders MONSTER 32mm bar is the strongest rear bar available for the ZETA II 5th Gen. Using our 32mm bar help evenly distribute load for the best drag launches possible is a 5th Gen.

LPE stands alone as the drag racing experts in the GM world. They have taken the best of Pedders and put the Lingenfelter touch to it for the hardest core drag racers with ridiculous amounts of power. I'll let the Crew from LPE post up more details.

[JusticePete]

Originally Posted by mlee

^^^^ This^^^^ the fastest 60' car we have here 1.54 is totally stock with only the JRE posi mod... It's an auto of course... Lowered cars have problems because they don't squat enough on launch so do coilover if you do lower it.

1.483, stick

[mlee]

Originally Posted by JusticePete

1.483, stick

... But that car doesn't have stock suspension... It also doesn't have Seats, AC etc, etc, etc... and not a daily driver...

[Padre]

1.653. Bolt-ons, 3200 TC, DR's. L99/A6.

Just BMR Trailing Arms. No wheelhop. No wheelspin.



I do enjoy reading from all the gang: Pedders, Pfadt, BMR. Keep the knowledge coming.

Padre

[BMR guy]

Both the 1.52 and the 1.48 listed above were done on drag slicks. One has minimal suspension mods (trailing arms) and the other has everything you could throw at it. Don't get me wrong, both cars are very respectable, I just want people to realize the difference. The BMR car runs 1.54-1.56 consistently at 3 separate tracks and it is doing this on DOT approved Drag radials (not slicks) and stock struts/shocks. Consistency is definitely key when drag racing....

[IPS Brandon]

Originally Posted by 10camaross

What have you guys been doing suspension wise for the drag strip?? I thought about getting some Pfadt coilovers but i just wanted to see what everyone was doing to hook up and get better 60s at the track

You are thinking in the right direction with Pfadt, they have been a essential partner in our progression towards the all out IRS drag record, and they will continue to help our efforts. We currently have their drag suspension coil over (among everything else) on our Corvette (here is a few videos of the car launching). The car currently runs 7.75 at 183 mph with 1.2x 60' times.






Now its pretty easy after witnessing the success we have that "the proof is in the pudding"

I have been involved with watching and in conversation about their drag specific coil overs, let me tell you they are 100% engineered to work, and work very well.

Pfadt offers a drag specific valved damper ( They are alone in this) and drag specific springs to offer the community to create ideal drag launch dynamics. If you are interested I would also like to recommend looking at their complete engineered packages. For example Pfadt's drag package 2. Note that Pfadt has the strongest rear sway bar at 35mm (the 32mm bar... it is not the strongest I can tell you this...). That package is currently being installed on one of our 1100 hp Twin turbo Camaros !

More info on the Drag two package here http://www.pfadtracing.com/catalog/p...roducts_id/213

So in summary, Pfadt is your best performing ENGINEERED option!

If you have further questions, I am open to help

Regards

[BMR guy]

Brandon, that Vette is BADASS! It was by far the funnest car to watch at the LSX shootout in Bradenton. The coolest thing about it is how stock it looks from the outside.

Ok, enough drooling, just wanted to point out a possible error in your post since you may not be aware of our new rear sway bar. BMR's new Xtreme Anti-roll Bar (XSB004) for the Camaro is also 35mm so, depending on the wall thickness and lever arm lengths, we may actually be stiffer

The XSB004 ranges in rate from 2186 lbs/in - 3614 lbs/in depending on which hole you use...

[JusticePete]

Pedders 32mm bar is solid.

[IPS Brandon]

Originally Posted by BMR guy

Brandon, that Vette is BADASS! It was by far the funnest car to watch at the LSX shootout in Bradenton. The coolest thing about it is how stock it looks from the outside.

Ok, enough drooling, just wanted to point out a possible error in your post since you may not be aware of our new rear sway bar. BMR's new Xtreme Anti-roll Bar (XSB004) for the Camaro is also 35mm so, depending on the wall thickness and lever arm lengths, we may actually be stiffer

The XSB004 ranges in rate from 2186 lbs/in - 3614 lbs/in depending on which hole you use...

We appreciate it, and you may in fact be right about your bar, and in all honesty I was unaware (as you mentioned) that was available now, very cool!

[94guy]

i have been a 1.53 on DR with less power then the cars mentioned above, and plenty of 1.54's all stock suspension. i would like to buy some of these better parts mentioned but i need someone to step up and show real world results. Oh yea i'm lowered 1"

[JusticePete]

Originally Posted by 94guy

i have been a 1.53 on DR with less power then the cars mentioned above, and plenty of 1.54's all stock suspension. i would like to buy some of these better parts mentioned but i need someone to step up and show real world results.

Our success with the Lingenfelter car resulted in more than a 2/10s reduction in 60' times with our standard Supercar coilovers over a brand-x set of coilovers. Working with Graham and his staff we were able to find an additional 1/10th with further revisions in damping, along with different length and rate coils. Working with LPE has been exceptional as their data logging was essential to the product development. I'll leave it up to Graham or Jason to post further details as I am not sure what they consider trade secrets.

Do they work? Yes, extremely well.
Can I post the data? It is not mine to post.

Hang tight. The data will be there for you to make an informed buying decision.

[RichJ.]

Bottom line Foundation Foundation Foundation always start with a good Foundation

[Graham Behan]

Hey Pete,
Hows that great new facility of yours working out?

The development work we have been conducting with the LPE Camaro and our partner Pedders has resulted in in a best 60 ft of 1.304 in our IRS 4200 lb car. This car is a manual 6 speed and the adjustability in both re-bound and compression independantly, plus Pedders willingness to develop the dampenining characteristics neccessary to control the shock to the overall system, ie weight transfer and the re-bound of the rear shock to keep the rear end planted aided us in our quest for an 8 second car. The travel of both front and rear shocks was measured with linear displacement transducers and that data fed back to Pedders who developed the shock package for us. There are significant differences between the Street / Road racing requirements to our drag racing set up. I agree that there are not many Gen 5 Camaros out there that have the performance of our car, but the fundamental principles of the suspension control strategy we and our partners Pedders have developed hold good for a 5 th gen Camaro owner, of a power level up to and including ours, that wants to optimize the drag race performance of their car.

Graham.