22-4 base set-ups for astro

[RobW]

Normally I'd try and work it out myself but due to a combination of factors it looks like the first time I'll get to race my 22-4 will be our first 4WD regional so the question is has anyone got a base astro set-up they would care to share?

I've looked on Petit but the only astro set up on there is one from Norway where there was snow!

I've had a about 10 minutes running with the car in the damp and it felt very smooth and easy to drive but lacking a little initial turn in but that was probably due to conditions and wrong front tyres. That was pretty much kit set up.

I've had a few thoughts about things to try but given my lack of time really just looking to see if there is any consensus on changes from kit set up for our UK tracks.

Thanks

Rob

[racingdwarf]

Intresting how slow the response is to the post, I have a 22-4 and on damp cold astro It was very good out of the box, on the same track but a nice dry warm day it was quite possibly the most unforgiving car I have driven for a very very long time. I wouldn't clam the setup was anywhere near worth posting on here as I wouldn't wish that car and that result on anyone

The lack of response on here is starting to make me wonder if I'm not alone in the struggle

Just to point out, I'm not saying it crap, It's working well on my home clubs grass track and dirt track, just the experience I had on mega high grip

[No. 46]

Im getting there with mine, in all conditions on astro. Biggest and best changes are to use the wider rear hex and some extra droop on the rear in my opinion. Other than that I have gone to the black front spring, and the pink spring on the back with 25wt oil. Put the front shock bottom to the outside hole and also run the left cell forward.

Set a track record at my local track last time out so can't be to shabby

[Niall Cromie]

Hi just spent in total approx 4 days trying to understand the 22/4. finally got something really interesting. I initially found that the static damping on the car was realy way off and spring rates were not correct. Car was slugish didnt want to turn in over damped etc etc just didnt like astro.
First change 6 hole pistons front and back drill 1.56mm holes. front oil 32.5 weight. rear 30 weight. second change 5 degree castor blocks (modified 22 alloy ones what a difference)
Springs rear losi Pink, Front durango Purple (losi blacks to soft 4.64lb poor front tio back balance . I also have made my own HR rear roll centre blocks with 2 degree anti squat. (New rear inside hole positions on rear A arms. get out the dremel
rear Links as follows. rear hub B - 3 - shock tower 1 or 2
Front links 3 - shock tower 2 A arm inside
outside limiters 2mm front - rear - 2mm inside + 2mm Outside
Track fast bumpy astro lots of elevation changes technical with jumps
Try these and let me know car is now EXCELLENT no additional weights batteries to rear position enjoy

[super__dan]

Id imagine the minimal responseis because it's so early in the season, I've not been outside with either of my cars yet.

[RobW]

Thanks for replies guys, guess Dan is right that it is a little early to have a consensus on base changes required to kit set up for astro.

Lots of useful ideas though so I guess I will have to stop being lazy and work through them myself - guess the first meeting with the car will be a bit experimental!!

Probably try some 6 hole pistons as you suggest Niall as even with 25wt oil it feels a bit over-damped on the bench with kit pistons. Are you running the optional high roll centre rear block or do you mean you made your own one? I'll also drill the extra inner shock mount hole as that is an easy and cheap tuning option!

No. 46, what effect did running the wider rear hex have for you?

Rob