rear shock tower on front mr4tcsd

[mr4man]

hi is everyone getting the improvement to the car they thought with this mod.
where i race barham i find i cannot get enough inital turn in
on slow corners even with one way no matter what i do.
seems to suffer from understeer!
any ideas?
rich :-

[nitro-head]

the rear tower on the front makes ths shocks stand up more so there fore making your front end softer, giving a little more turn in.

when i did this mod to mine it helped a lot, and even more when i did the servo conversion too.

i just ground off the body post mount things with a dremel so it don't bash on ur shell.

[sosidge]

More stood up actually makes the suspension a bit stiffer, but you're right about the handling- you get more initial turn-in response, but a bit less in the middle of the corner - I like a more stood-up shock (I use Atheena Projects towers all round, so i can stand up the rear shocks a bit as well) - the car feels more direct.

[nitro-head]

how does it make it stiffer.

the more vertical they are, the softer they are, in a way.

grrrrrrrr........i know what i mean

hehe

if you don't want to use a rear tower on the front.

just use softer oil/springs in the fornt, or make the back harder..
this will increase the steering.

[sosidge]

If only I could draw a diagram...

Basically, visualise two scenarios - one is a shock close to perpendicular to the wishbone - standing up. Another is a shock close to horizontal to the wishbone - layed down.

As you compress the suspension, the stand-up shock compresses more for a given amount of wheel travel than the layed down shock. More compression on a spring needs more "work", hence a stiffer rate.

Of course, there's also the increase in friction in the seals of a layed down shock, because there is a component of the compression that is actually forcing the shock shaft perpendicular to the wishbone regardless, which just complicates things really.

But anyway, the handling change you noted is all that REALLY matters!

[johnbull]

Hi friends. Greetings from Malta.

A more upright shock is stiffer to compress. Angle it and it becomes easier. Remember studying pulleys and leaverages at school? My goodness I'm going back 45 years!

Of course if you set them upright by bringing the bottom mount in then yes, you will soften, but the object of the rear tower up front is to put the shocks further out.

I use the Rayspeed towers on mine. I have to say that it feels lots better.

Regards

Joe from sunny Malta.

[sosidge]

Remember studying pulleys and leaverages at school?

They don't teach the kids anything these days Joe! Even the stuff I was doing 10 years ago for GCSE is seen as A-level work now. I don't think I did anything on pulleys and leverages at school though...

[johnbull]

They don't teach the kids anything these days Joe! Even the stuff I was doing 10 years ago for GCSE is seen as A-level work now. I don't think I did anything on pulleys and leverages at school though...
[quote]

Ah, David. You're obviously lots younger than me then.

Yes I remember it all from Science classes with Mr. Carey - good bless his soul!

So what do they teach kids in science class these days?

Regards

Joe from sunny Malta.

[Scotty]

If you want more initial turn in, try a spacer under the outside front ball stud that holds the turnbuckle.

Another thing is change the servo position so it is like the rayspeed conversion position, huge improvement. ;D