jkirkwood

iTrader: (8)

Here is most of Mike's setups plus a slew of others.

http://www.petitrc.com/view_news.php?id=4620

I tried Mike's Snowbirds, IIC, and Cleveland setups. All of them have been well balanced on the track with Sorex 28s. After doing so I took the fastest one and adjusted from there and found some more speed as I adjusted the setups to my driving style and very tight track.

Brian L

iTrader: (21)

Horizon has one-ways available for those who are looking for them.

Dragonfire

iTrader: (1)

Tempe as in SMA? If so I'm surprised I haven't bumped into you at the track! I run 10.5. Just look for the fastes car on the track (white LTC-R).

The oneway in 17.5 is a personal preference. I wouldn't run one even in 540 but then again my brother loves running diffs or oneways in 17.5. I suggest trying a diff 1st as it costs nothing to try. If you like the extra steering then get a oneway. I will prolly do another order from stormer mid-end next month after I see what wears on this chassis (so far only front outdrives). If you need one I can add it to the order then.

dcuz383

iTrader: (1)

When you change the pulleys from 42T to 41T does it change the internal drive ratio? The book say the car has a 1.83 IDR. What would it be if you use a 41T? What about both pulleys 41T. I am trying to gear for 17.5. 3.5 FDR

jkirkwood

iTrader: (8)

The internal drive ratio changes with the 41T pulley installed at both the front and rear. I believe it is 1.786 with 41T's.

a_main_attendee

iTrader: (2)

It will drop the internal from 1.826 to a 1.7826 (both pullies being 41 tooth)3.5 devided by 1.7826 would be 1.963424, which is the effective spur/pinion ratio you would need to obtain the 3.5 FDR.What you would need to do then is devide the spur tooth count by 1.963424, which would give you an approximation as to what pinion you would use. For a 118 tooth spur and 41 tooth pulleys front and back, you would need a 60 tooth pinion to obtain a close to 3.5 FDR. Simple algebra is all that's required to figure this out.

MikeXray

iTrader: (73)

No way your going to fit a 60/118 combo though, time to get a PRS adapter and a 108 spur.

metalracer2

iTrader: (20)

i run a 17.5 in my type r and i'm around 3.5
i have the prs adapter with a 104 spur and a 53 or 54 pinion

a_main_attendee

iTrader: (2)

'Twas just an example of how to figure pinion with a given spur to get the ratio that was wanted. (I've never ran 17.5 either, so i wouldn't know. )

dcuz383

iTrader: (1)

Thanks. Great info.

I have another question. I ran this weekend at SS raceway in Tampa and kept having problems with my front spool coming loose. Attached is the instructions for the differential assembly that I used for building the spool. There are not instructions for spool that I have found. I followed the instruction for the diff except I left out the diff balls but used everything else.

Brian L

iTrader: (21)

Did you replace the standard pulley with a spool pulley? Make sure there is no lube on the diff rings to cause it to slip. You also can try a new diff hub to make sure the screw is not backing out of it.

MikeXray

iTrader: (73)

Didn't mean to sound harsh about it, just wanted to let him know that 3.5 without a smaller spur isn't doable. I used to run 53-57/118 with my 17.5 in rubber though, it never needed 60, and if you have a new speedo that has timing, you'll be geared alot lower.

dcuz383

iTrader: (1)

Yes. I am using 41T spool pulley. No lube. The screw keeps coming loose.

Dragonfire

iTrader: (1)

Use a very small amount of super glue (CA) on the tip of the thread when you bolt in the diff screw. This will help lock it in place and also will increase the size of the threads a little so next time it is tight as well. I haven't had mine come loose once since I did this (both front and back diff/spool) and both can be dissasembled and reasembled like normal without any need for more glue.

jrxs-r

iTrader: (11)

Check your diff hub where the screw goes into... make sure its not stripped. If in doubt, replace it and follow what dragonfire recommended.