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Fat Steve Insane Misfit!
Joined: 20 Feb 2006 Total posts: 1089 |
 Posted: Fri Aug 03, 2007 6:06 pm Post subject: |
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Since we're analyzing launch's, here's mine, far lane, grey GT. I have 175 14" coilovers on a fox body 90/10. Cut stock springs in the back and strange shocks set around 4 (10 being the stiffest) getting the best results. My front comes up then down just as fast. How do i keep that front up from unloading the tires! SN95 struts? 60 was a 1.88 on this run  in the heat, like 85-90 degrees this race. http://videos.streetfire.net/video/72a6e96f-b90b-42d4-836d-997e01748460.htm
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Wed Aug 15, 2007 8:10 pm Post subject: |
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| 96SOHC wrote: | | Lazer Red 99 GT wrote: | see Jeff, there are little things that people never even consider that can affect a car in a big way. Just think wat the car would run on the brake in decent air with the rear tire pressure up a little bit.  |
Yep, it would seem so. Just got an email back from Kevin Slaby (Baseline Suspensions) and he indicated in a nutshell that the front was too stiff and the rear too soft. By front to stiff, he means I don't have enough front strut extension. He had me measure the car at rest fender height, and then the height when the strut is fully extended...I have 2.5" of strut extension. He want's the car to have between 5 and 6 inches!! Not sure how I'll accomplish that. The front strut extension is very important for not only weight transfer, but how quick the car can react and not bog. As far as my rear being to soft (excuse me ladies!), he means the shocks, not the springs. He seems to think my rear shock are worn out and to try a set of 50/50's. Also he recommended I raise the rear of the car body by 3/8th's of an inch. So, I either need to get another set of springs, or try some spacers. Any ideas? |
OK, got the rear of the car raised 3/8th's inch per Kevins instructions and now have 5 inches of strut extension! Should launch like a Renegade car...only not near the power. Hopefully I can get the both sides of the front end modification done by this weekend so I can go to the track and check it out.
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Wed Aug 15, 2007 8:12 pm Post subject: |
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| Fat Steve wrote: | | Since we're analyzing launch's, here's mine, far lane, grey GT. I have 175 14" coilovers on a fox body 90/10. Cut stock springs in the back and strange shocks set around 4 (10 being the stiffest) getting the best results. My front comes up then down just as fast. How do i keep that front up from unloading the tires! SN95 struts? 60 was a 1.88 on this run in the heat, like 85-90 degrees this race. http://videos.streetfire.net/video/72a6e96f-b90b-42d4-836d-997e01748460.htm |
Looks like your car jumps up, and then falls right back down just as fast. Needs more front strut extension!
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| jimh88lx Harty Racing CEO/Wrench Joined: 08 Sep 2005 Total posts: 723 |
| Posted: Wed Aug 15, 2007 9:06 pm Post subject: |
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| 96SOHC wrote: |
Well, I figured out (or read on Hardcore) how to get more strut extension. It invloves mounting the caster camber plates upside down under the shock towers. And, I've got a line on a set of Lakewood 50/50's. |
Why would flipping the plates increase the strut extension? Seems like all it would do is raise the ride height. Wouldn't the strut extension be limited by the strut itself rather than the mount on the car?
Or are they trying to say if you increase the front ride height you will increase the strut extension. That being the case you can adjust ride height if you have adjustable struts and forget about flipping the plates.
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Wed Aug 15, 2007 9:16 pm Post subject: |
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| jimh88lx wrote: | | 96SOHC wrote: |
Well, I figured out (or read on Hardcore) how to get more strut extension. It invloves mounting the caster camber plates upside down under the shock towers. And, I've got a line on a set of Lakewood 50/50's. |
Why would flipping the plates increase the strut extension? Seems like all it would do is raise the ride height. Wouldn't the strut extension be limited by the strut itself rather than the mount on the car?
Or are they trying to say if you increase the front ride height you will increase the strut extension. That being the case you can adjust ride height if you have adjustable struts and forget about flipping the plates. |
Jim, when you flip the caster camber plates (mount them under the shock tower as oppossed to on top of the shock tower), you compress the strut more, giving you more usuable extension. The down side to doing this is you limit the amount of strut compression. I have a little over 1 inch of compression, where before I had about 3" or so of compression. All I know is I know have a full 5" of strut extension because I measured it before and after flipping the plates. But you are right, the strut only has so much travel, by flipping the plates you have more extension as opposed to more compression (remember how bad these cars would nose dive under heavy braking when they were stock?). I'll see if I can get a picture tomorrow showing the difference.
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Thu Aug 16, 2007 8:08 am Post subject: |
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Jim, I put this together to graphically depict what I'm talking about:
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| cool hand Mega Misfit
Joined: 14 Oct 2005 Total posts: 684 |
| Posted: Thu Aug 16, 2007 8:20 am Post subject: |
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Man Jeff, this is great info. Can any caster camber plates be flipped??
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Luke This might be a bad idea Clark
The Red Turd
Dayton Performance Tuning
www.dayton50perf.com
http://web.ics.purdue.edu/~papa
You live for the fight when its all that you got!!! |
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| Brandon Alsept Misfit
Joined: 24 Aug 2005 Total posts: 134 |
| Posted: Thu Aug 16, 2007 10:20 am Post subject: |
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You have to do some massaging on the Maximums to flip them on a SN95 car. You only really need to flip the camber plate on them to get about a full inch more travel if you need it.
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P/S 5
10.15@132 |
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Thu Aug 16, 2007 10:32 am Post subject: |
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| cool hand wrote: | | Man Jeff, this is great info. Can any caster camber plates be flipped?? |
Like Brandon said...they are all a little different. I couldn't find any info on mine (Hotchkis brand), so I removed them to try it...they seem to work inverted just fine! Give it a try, only takes a few bolts removed to try it.
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| Fat Steve Insane Misfit!
Joined: 20 Feb 2006 Total posts: 1089 |
| Posted: Thu Aug 16, 2007 10:34 am Post subject: |
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| My car is lowered so i run 79-93 Spec lakewoods, fearing i'd bottom out SN95 struts like i did with my old Strange struts and coilovers
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| kurt02gt Joined: 24 Jan 2006 Total posts: 1521 |
| Posted: Thu Aug 16, 2007 11:29 am Post subject: |
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| Brandon Alsept wrote: | | You have to do some massaging on the Maximums to flip them on a SN95 car. You only really need to flip the camber plate on them to get about a full inch more travel if you need it. |
Don't most people limit front end travel not increase it? Just curious
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| Brandon Alsept Misfit
Joined: 24 Aug 2005 Total posts: 134 |
| Posted: Thu Aug 16, 2007 11:53 am Post subject: |
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Really just depends on the car and how it reacts on launch. Some will go faster witrh less extension and not hitting the tire as hard, some need the extra extension to keep the tire planted. Just depends on the setup and the launching methods used on it.
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P/S 5
10.15@132 |
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Thu Aug 16, 2007 7:39 pm Post subject: |
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Houston, we have liftoff! Here's a before/after look of the strut extension:
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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| Fat Steve Insane Misfit!
Joined: 20 Feb 2006 Total posts: 1089 |
| Posted: Fri Aug 17, 2007 7:20 am Post subject: |
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| What did you exactly do Jeff? That's prety cool? What struts/springs are you running? How low is the car? SN95 or Fox struts?
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| 96SOHC Shoe Polish Nazi
Joined: 26 Sep 2005 Total posts: 5420 |
| Posted: Fri Aug 17, 2007 8:20 am Post subject: |
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| Fat Steve wrote: | | What did you exactly do Jeff? That's prety cool? What struts/springs are you running? How low is the car? SN95 or Fox struts? |
I just flipped the black part of my caster camber plates (the part that says 'Hotchkis') upside down. Running stock front springs cut about 1/2 coil. The struts are Tokico 5 way adjustable drag struts and are SN95 length. My car does not sit low...it looks good on the street, but is not necessarily good for a race car suspension.
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Jeff
2008 NMRA MM 6
BC-Automotive 4R70W, Delta Force Tuning
Circle D Specialties Billet Converter, Modular Head Shop |
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