Getting lower with Strano/koni Setup
Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
I hope this helps lol I dont know if anyone has tried to use paint on a MAC but it doesnt exist so I used some program called GIMP to create this pic, it took a while haha.
I hope this picture makes it easier for people to see what this mod really does with the konis on the lower perch. Please let me know if anything is wrong, I think its correct. Kinda hard to make a picture without the part in your hand.
Note that with the upper mount mod and the spring on the lower perch ( perch is the blue horizontal line), the perch is still in the same vertical location as the shot of no mod on the upper perch.
I hope this picture makes it easier for people to see what this mod really does with the konis on the lower perch. Please let me know if anything is wrong, I think its correct. Kinda hard to make a picture without the part in your hand.
Note that with the upper mount mod and the spring on the lower perch ( perch is the blue horizontal line), the perch is still in the same vertical location as the shot of no mod on the upper perch.
I haven't do the "UMM". That should gain you travel back, in which case then using the lower perch would be ok.
__________________
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
Because there is only a limited about of travel. The less travel, the more spring rate you need to compensate. The rates of my springs were dictated to match the stock perch height. If you want to lower the car more with the lower perch, that's up to you, but I generally do not recommend it.
I haven't do the "UMM". That should gain you travel back, in which case then using the lower perch would be ok.
I haven't do the "UMM". That should gain you travel back, in which case then using the lower perch would be ok.
I guess my next question would be:
If I plan on doing the UMM and putting the spring on the lower perch, is there a chance the spring wont be compressed on the lower perch when assembled.
Spring won't have much if any tension on it when put together.... until the car sits on it, then everything will compress down to the spring's height. You would just have to be careful when you lower the car to guide the spring so that the spring pigtail fits the upper mount properly.
__________________
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
On my Konis I measured a little less than 3/8", more like 11/32". When you multiply this by 1.7 (the ratio of wheel travel vs. spring travel) you get between 9/16" & 5/8" body drop on the lower perch.
If you do the UMM at 1/2" (or more) and use the lower perch you actually have more shock travel available than stock.
If you do the UMM at 1/2" (or more) and use the lower perch you actually have more shock travel available than stock.
Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
On my Konis I measured a little less than 3/8", more like 11/32". When you multiply this by 1.7 (the ratio of wheel travel vs. spring travel) you get between 9/16" & 5/8" body drop on the lower perch.
If you do the UMM at 1/2" (or more) and use the lower perch you actually have more shock travel available than stock.
If you do the UMM at 1/2" (or more) and use the lower perch you actually have more shock travel available than stock.
thanks for the reply! I thought I'd never get the answer haha.
Are you sure you can multiply the 11/32" drop by the ratio to get how much the fender gap will close? If thats the case, I will be even more satisfied with this mod!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
I recall the 1.7 ratio from a JasonWW thread, it might have been the original UMM thread. Jason is usually pretty accurate with that stuff. If you split the difference and use 1.85 that gives you a little over 5/8" drop.
IMO, if you have access to a band saw it would work best, otherwise use a die grinder with a 3-4" cut-off wheel.
Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
I only have a sawzall, grinder and a hacksaw, I havent lived in San Diego very long and dont know anyone with a bandsaw :-(
anyone got pics on how the cutting came out?
Hiltsy855 and 99BluZ28, Did you guys cut a full 3/4 off the upper mount?
Hiltsy, do you have the strano/koni setup?
anyone got pics on how the cutting came out?
Hiltsy855 and 99BluZ28, Did you guys cut a full 3/4 off the upper mount?
Hiltsy, do you have the strano/koni setup?
I only have a sawzall, grinder and a hacksaw, I havent lived in San Diego very long and dont know anyone with a bandsaw :-(
anyone got pics on how the cutting came out?
Hiltsy855 and 99BluZ28, Did you guys cut a full 3/4 off the upper mount?
Hiltsy, do you have the strano/koni setup?
anyone got pics on how the cutting came out?
Hiltsy855 and 99BluZ28, Did you guys cut a full 3/4 off the upper mount?
Hiltsy, do you have the strano/koni setup?
I had Stranos for a couple weeks but they were too stiff for my taste.
Thread Starter
TECH Enthusiast
iTrader: (4)
Joined: Apr 2005
Posts: 644
Likes: 0
From: Salinas/ San Diego, CA
No pics, sorry. IMO, the sawzall is the ticket for these cuts. Use a 3/4" or 1" wide blade so it won't try to wander while you make the cut. 99 has obviously had success with other methods though so do as you will. I didn't cut the whole 3/4" off, I only went a strong 1/2".
I had Stranos for a couple weeks but they were too stiff for my taste.
I had Stranos for a couple weeks but they were too stiff for my taste.
So did you have the koni/strano setup on the car before and after you did the UMM? lower perch? and if so how much did it lower your car?
Measure and mark around the entire circumference you need to cut, then cut through the initial layer of rubber first. If you're using a hacksaw clamp it upside down in a vise(if you have one), then move the upper mount back and forth by hand.
Regardless of how you cut it you need to have it secured in a vise.
I cut off 5/8", measured from the metal tube in the middle of the upper Mount.
U.M.M. with Edelbrock IAS shocks
U.M.M. with Koni SA's and GC kit
Regardless of how you cut it you need to have it secured in a vise.
I cut off 5/8", measured from the metal tube in the middle of the upper Mount.
U.M.M. with Edelbrock IAS shocks
U.M.M. with Koni SA's and GC kit
Last edited by 99Bluz28; May 5, 2010 at 02:25 PM.