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Old 09-03-2009, 08:47 PM   #1141
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Looking at some pics it doesn't seem that Pietsch's added a center vertical strut like the one Salven or Mark Green used on their Serpent,as far as the rear shock mount, he used the left over pieces from the radio tray to make the brackets, if you really have a closer look at the pictures you will understand what really went down, but i find it to be a very cool mod. for what i understood, the Flex should make the car faster in and out of turns, the rear shocks at that position should help stabilize and improve rear traction.



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Originally Posted by djmachinist View Post
I have the radio tray strut mod and the rear shock mt. mod done to
my car. Tried it this week end at the Gulf Coast raceway in Houston.

You can see just a hint of additional torsional flex in the chassis, not
much, however how far are you really going to flex a 5 mm chassis?
The car seems to have just a little more side bite in the rear. The super quick rotation the X rear end usually has, is tempered just a bit without any
apparent adverse effect on steering. The rear end feels more planted.
I also added a center vertical strut like the one Salven used on his Serpent.
This strut can pivot so it does not affect the tortional flex however it
holds the back of the radio tray down. I could not tell from the world
pictures of Pietsch's car if he had this feature or not.


As far as the rear shock mod, no conclusion on how this fits in with the
radio tray mod, But it does not seem to hurt anything so I'm keeping it.

Dale
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Old 09-04-2009, 05:07 AM   #1142
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Quote:
Originally Posted by epowr_Racing View Post
Looking at some pics it doesn't seem that Pietsch's added a center vertical strut like the one Salven or Mark Green used on their Serpent,as far as the rear shock mount, he used the left over pieces from the radio tray to make the brackets, if you really have a closer look at the pictures you will understand what really went down, but i find it to be a very cool mod. for what i understood, the Flex should make the car faster in and out of turns, the rear shocks at that position should help stabilize and improve rear traction.
Yes, the car does exhibit more rear side bite, I added the center strut from
salven's car to hold down the rear of the tray, it just seemed to be the proper
thing to do. My friend Bob Engersole from Dallas drives a Serpent 966, He also
tried the Salven Mod on his car. He ran the car at the SWS # 5 race here in
Houston two weeks ago where he thought it was an improvement. I talked to
him last night, he is at the US Nationals in Toledo. He said the traction is so
high at the Toledo track He had to take the Salven Mod off his serpent due to
traction rolling. The extra flex and resultant increase in traction was not needed at Toledo. He went back to the stock radio tray setup. So this mod
is not the answer to all conditions.

Dale
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Old 09-04-2009, 06:13 AM   #1143
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Quote:
Originally Posted by djmachinist View Post
He had to take the Salven Mod off his serpent due to
traction rolling.
I never thought the day would come we would face traction roll on our 1/8 cars...
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Old 09-04-2009, 06:20 AM   #1144
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I had traction roll issues at Ft. Meyers a few years back. Once I worked it out the car was wicked fast.
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Old 09-04-2009, 07:02 AM   #1145
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Quote:
Originally Posted by wingracer View Post
I had traction roll issues at Ft. Meyers a few years back. Once I worked it out the car was wicked fast.
just run 60 shore tires...
I reckon the track then was sprayed?
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Old 09-04-2009, 07:20 AM   #1146
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Yep, sprayed. Actually it only took a year old set of 37's and a few set-up tweaks to keep it on all fours (or at least three).
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Old 09-04-2009, 09:11 AM   #1147
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Quote:
Originally Posted by wingracer View Post
Yep, sprayed. Actually it only took a year old set of 37's and a few set-up tweaks to keep it on all fours (or at least three).
I understand the Toledo club sprays their track with a mixture of castor oil
and methanol. I have seen Traction rolling at tracks here in Texas in the past. Usually when the tracks are sprayed with lots of sugar water or worse yet, when sprayed heavy with VHT liquid butyl rubber.

Dale
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Old 09-04-2009, 09:52 AM   #1148
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I love VHT.
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Old 09-04-2009, 09:55 AM   #1149
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If you think vht has alot of bite...come down to our track!

Vp lane choice!

38/40 and 40/42 is not uncommon for 1/8.

www.controlfreakz.com
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Old 09-04-2009, 09:57 AM   #1150
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Where the hell can you even get 42 rears?
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Old 09-04-2009, 10:28 AM   #1151
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Quote:
Originally Posted by senna555 View Post
If you think vht has alot of bite...come down to our track!

Vp lane choice!

38/40 and 40/42 is not uncommon for 1/8.

www.controlfreakz.com
+1 for VP Lane Choice. The Region 11 Regionals were held last weekend in Spokane, WA and the local club used VP Lane Choice. The grip was great and the cost was much lower than VHT.
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Old 09-04-2009, 11:21 AM   #1152
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Down here in Florida the track owners have sprayed just about everything.
Kissimmee, Homestead and The Fort all have there own top secret "mix". Old fuel, Karo syrup, vht, who knows what else is in there. One track is actually "dragging" the track with old race car tires which has helped tremendously.
I traction rolled once at The Port (www.rc-racing.org). It was in the middle of the right hand sweeper at the end of the straight. It was very violent. It literally looked like the car exploded off the track.
One thing is for sure, VHT cut with methanol builds high grip levels very rapidly and it's not cheap.
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Old 09-04-2009, 11:44 AM   #1153
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Yep i do agree, is not for all conditions, if i do remember the issue at the worlds was the lack of traction,



Quote:
Originally Posted by djmachinist View Post
Yes, the car does exhibit more rear side bite, I added the center strut from
salven's car to hold down the rear of the tray, it just seemed to be the proper
thing to do. My friend Bob Engersole from Dallas drives a Serpent 966, He also
tried the Salven Mod on his car. He ran the car at the SWS # 5 race here in
Houston two weeks ago where he thought it was an improvement. I talked to
him last night, he is at the US Nationals in Toledo. He said the traction is so
high at the Toledo track He had to take the Salven Mod off his serpent due to
traction rolling. The extra flex and resultant increase in traction was not needed at Toledo. He went back to the stock radio tray setup. So this mod
is not the answer to all conditions.

Dale
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Old 09-04-2009, 11:47 AM   #1154
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It seemed like every interview the driver was looking for more steering.
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Old 09-04-2009, 11:52 PM   #1155
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but i guess until you actually try the mod you wont really know how it really feels, (same mod, different drivers)

Quote:
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It seemed like every interview the driver was looking for more steering.
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