Closed Cell Foam Tuning
#1
Closed Cell Foam Tuning
I'm just getting back into dirt after running carpet for the last couple years . I talked to the local races about what they do to their foams to get the best traction and they have been using this guide.
https://blog.jconcepts.net/2019/08/jconcepts-track-tire-guide-will-brintons-hobbyplex-tire-guide/ ]Hobbyplex Tire Guide[/url]
Now my tires seem to work good but the moisture level changes often on this track so tread height varies depending on this and I know the flatter the foam the larger the contact patch the better the grip . But at what point is the foam too soft and what handling characteristics would you notice that would you tell you this?
https://blog.jconcepts.net/2019/08/jconcepts-track-tire-guide-will-brintons-hobbyplex-tire-guide/ ]Hobbyplex Tire Guide[/url]
Now my tires seem to work good but the moisture level changes often on this track so tread height varies depending on this and I know the flatter the foam the larger the contact patch the better the grip . But at what point is the foam too soft and what handling characteristics would you notice that would you tell you this?
#2
I'm just getting back into dirt after running carpet for the last couple years . I talked to the local races about what they do to their foams to get the best traction and they have been using this guide.
https://blog.jconcepts.net/2019/08/jconcepts-track-tire-guide-will-brintons-hobbyplex-tire-guide/ ]Hobbyplex Tire Guide
Now my tires seem to work good but the moisture level changes often on this track so tread height varies depending on this and I know the flatter the foam the larger the contact patch the better the grip . But at what point is the foam too soft and what handling characteristics would you notice that would you tell you this?
https://blog.jconcepts.net/2019/08/jconcepts-track-tire-guide-will-brintons-hobbyplex-tire-guide/ ]Hobbyplex Tire Guide
Now my tires seem to work good but the moisture level changes often on this track so tread height varies depending on this and I know the flatter the foam the larger the contact patch the better the grip . But at what point is the foam too soft and what handling characteristics would you notice that would you tell you this?
#3
Tech Champion
iTrader: (33)
To add to Shawn's point, that gap may not be apparent without load, sometimes the rubber will fold over and you might hear a "snapping" sound on hard acceleration if grip is high... sometimes this can generate a ton of grip with forward bite but the car might get squirrelly in the chicanes and or traction roll.
I have found that punching a single row of holes on each rib down the center works best for me, but I only punch the rear inserts and leave the front inserts alone. If I needed more steering, then I would punch the inserts up front. If I needed more rear grip then I'd punch more holes, but I prefer to punch them closer together along the centerline unlike the way Will Brinton punched his, but his example combines both punching and V-cut together which I've never done personally... I also race only 1/8 classes lately, and there tends to be a far wider tuning range with lighter 1/10 cars where foam density isn't as sensitive as they are with heavier 1/8 cars.
I have found that punching a single row of holes on each rib down the center works best for me, but I only punch the rear inserts and leave the front inserts alone. If I needed more steering, then I would punch the inserts up front. If I needed more rear grip then I'd punch more holes, but I prefer to punch them closer together along the centerline unlike the way Will Brinton punched his, but his example combines both punching and V-cut together which I've never done personally... I also race only 1/8 classes lately, and there tends to be a far wider tuning range with lighter 1/10 cars where foam density isn't as sensitive as they are with heavier 1/8 cars.