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Re: Dan's ProCat runner/racer project
Posted: Thu Jun 12, 2014 8:43 am
by DerbyDan
Peakey wrote:What setup were you running as for shock oils ect
I basically followed (as close as I could) what Phil Davies outlines in the scanned mag article on page 4 of thid thread, so;
Std Schumacher silver shocks front & rear - rebuilt with new seals & diaphrams (the diaphrams are still available from Schumacher, listed for their current small bore shock design - but fit the old shocks
) & using AE green slime. I've got 30wt oil with #2 pistons (kit) in the rear with kit springs & 25wt oil with #1 pistons (kit) in the front, again with kit springs. The front roll bar is connected & the shocks are mounted on the outer hole of the wishbones both front & rear (outer of the inner two on the front - the outer two holes are for the roll bar)
During the night I lifted the inner camber links on the rear to the upper hole to reduce the roll along with moving the rear shocks out on the lower wishbones to reduce the ride height (since I already had no spring spacers fitted). If I was to run this car outdoors on a more undulating track I would return the rear shocks to a more upright position on the next hole in along the arm & generally run it with more ride height which I guess would mean that the lower inner camber link would be better?
I did feel that the car was over-damped at the front... I used 25wt as I didn't have any 20wt, I think 20wt would be about right - likewise the rear didn't react quick enough for my liking so am contemplating going down on the oil to 25wt - also a softer spring - & if I use a shorter spring I will be able to reduce my ride height without having to compromise on shock position
Re: Dan's ProCat runner/racer project
Posted: Wed Jun 18, 2014 6:55 am
by DerbyDan
In the end I managed to finish 5th in the A final after holding 3rd for a few laps at the beginning of the race
Now.... wheres my 6.5bl motor
So I found that 6.5bl motor & put it in! Boy that made the ProCat fly! I raced the car again last night & with the car's extra speed (& punch to clear the double jump) I felt like I was much nearer the pace of the front-runners on what was a much busier race-night. I had a rather torrid time in my three qualifying runs which generally involved me moving over to let the fast guys through... who would subsquently crash... so I'd let them through again, & so-on, but I had done enough to qualify for the last spot in the 'A'. Onto the start of the A final... its sometimes better to start at the back & so it proved by picking my way past crashed cars on the first couple of corners off the start & so I found myself in 5th... the laps went by & I was really getting into the groove with the ProCat managing to stay with the field of leading cars for a short while! The two leading cars sprinted away, but having past the 4th place car (can't quite remember how) I ended up following the 3rd place car closely (A Cougar KF from memory) A couple of near grip roll moments caused me to drop back a bit but was really pleased to hold onto my 4th spot against a more competitive field!
Re: Dan's ProCat runner/racer project
Posted: Wed Jun 18, 2014 9:23 am
by Peakey
Well done dan it proves that these cars are still very capable even after a long life
Re: Dan's ProCat runner/racer project
Posted: Mon Jun 30, 2014 6:41 am
by Peakey
Dan did you have any problems fitting your servo? I was looking at mine last night and I'm not sure if it's my chassis or my servo but the holes seem to be about 2-3mm to far forward, so I'm struggling to put the mounting prices on the chassis for the servo.
On another chassis note I don't think I'm going to get my new chassis in time so I'm going to have to mod mine to take the lipos. And I'm going to try out your suggestion on mounting the steering assembly.
Re: Dan's ProCat runner/racer project
Posted: Mon Jun 30, 2014 1:35 pm
by tamiyadan
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Re: Dan's ProCat runner/racer project
Posted: Tue Jul 01, 2014 5:48 am
by DerbyDan
tamiyadan wrote:the holes are 2-3 MM out,, what you do is use thick Servo double sided foam tape and it fills the gap so the servo sits right.
I remember having to do stuff like that in the 80s as well.
I had to spacer the front servo mount up about 2mm on some plastic spacers so that the hole would align up with the hole in the servo's mounting 'ear' ... I used the rear mount/deck spacer that came with the car as the already drilled hole aligned perfectly with my servo. But I think Peakey, it sounds like your problem is with your servo being too short? My servo is a fairly old KO 2000 series & seems to be OK. Perhaps your servo is more modern & is smaller?
I would be inclined to fix the servo down with decent servo tape & just use one of the servo mounts to give you one mechanical fixing
Re: Dan's ProCat runner/racer project
Posted: Tue Jul 01, 2014 9:55 am
by Peakey
It is a new servo I've got rid of all my old ones so can't really compare but I have a small price of Perspex I'm going to try and make a mount for it if not then it's out with the servo tape.
Re: Dan's ProCat runner/racer project
Posted: Thu Jul 03, 2014 8:14 am
by Peakey
Quick question Dan do you know the bearing sizes on the pro diff ? I'm assuming the outer two are just the standard 8x16x5 but what are the others
Re: Dan's ProCat runner/racer project
Posted: Thu Jul 03, 2014 12:22 pm
by DerbyDan
Peakey wrote:Quick question Dan do you know the bearing sizes on the pro diff ? I'm assuming the outer two are just the standard 8x16x5 but what are the others
Yes - the outer two are the standard 8x16x5 - the inner two (that run in the diff covers) I believe are U762J 8x12
flanged the small middle bearing (that the pulley runs on) is U1O281 1/4" x 3/8"... but i'm not sure
Re: Dan's ProCat runner/racer project
Posted: Thu Jul 03, 2014 2:46 pm
by Peakey
Thanks dan
Re: Dan's ProCat runner/racer project
Posted: Tue Sep 09, 2014 9:25 am
by DerbyDan
Not sure if this works - I posted a video of the ProCat running on a grass track that my local club set-out at Wicksteed Park as part of a demonstration event during a Japanese car show over the weekend... over on IconicRC's facebook page, click on the link below;
https://www.facebook.com/groups/iconicrc/918324721514298/?notif_t=like
Re: Dan's ProCat runner/racer project
Posted: Wed Oct 22, 2014 7:18 am
by DerbyDan
Re: Dan's ProCat runner/racer project
Posted: Wed Oct 22, 2014 7:34 am
by Coelacanth
Nice, great paint job. I love that you painted the wing consistent with the scheme on the body.
Re: Dan's ProCat runner/racer project
Posted: Wed Oct 22, 2014 8:09 am
by npdp72
Looks great Dan.
As always, a very well turned out vibtage racer.
Thanks for posting the pics.
Re: Dan's ProCat runner/racer project
Posted: Fri Aug 14, 2015 4:40 am
by DerbyDan