Originally Posted by
TeamWTF
Wow thats a high FDR! Was it a very tight track?
I have been experimenting lately with lower FRD's... Ran 5.5 on the weekend with timing on a 17.5... Less timing (9 and 12 on #6) and #4 on 15 (To allow for higher rollout) zero delay. Seems to work out about the same in terms of speed and punch...
Next on the list is to try high FDR vs low FDR setups back to back. Anyone done this?
I run a fairly large track and have tested more things than i care to remember. The Tekins are running around a 6.0/6.5 roll out and a lot of the other hobby wing users are around the 5.5 mark. When spx was king 4.74 was the majik number and i made the HW work at that ratio.
I have moved back to a more normalish set up compared to some of the crazy ideas ive had. There are many ways to make this speed controller work. here is a high FDR vs low FDR comparison for you. The higher fdr set up is faster but if you have a clean track the low fdr is better over 5 minutes.
Duo 2 17.5
518 stock
motor...8*.........10*
FDR..... 5.7........4.8
Boost ..18*.......21*
Start....4500....6000
Turbo....max.........3*
Delay....0.1.......0.3..
Punch....-3.........-3..
Temp...75c........65c.
I have not tried the 5.7 set up with punch -4 but will do so next meet as it is temping on the high side and i wonder if dropping another tooth may help the -4 setting also.
IMO the lower the FDR you use the higher the start rpm needs to be. the more motor timing you use the lower the turbo or boost need to be. I Like the feeling of the added motor timing with lower boost and higher turbo.
It is all up to personal taste and be willing to take on board other peoples ideas and get someone experienced to spot your car for you and adjust the settings to suit the track you run.
HTH Benzaah.