SlowerThanYou

DMX, 2nd run on asphalt goes 9.92 driving thru the clutch badly. We tried to detune it, because Angel is not licensed and only legal to run 10.00. Well, it went 9.84 driving thru the clutch again. Need to do some clutch tuning & a final gear change.

Nice! I like it, brand new BHQ Member & 1st post is in this thread. I don't know what you consider more life out of the clutch is? This is our definition of useful life & it has been mentioned before. Peak performance for heads up racing we get about 100 runs. After that we use the clutch for Bracket/Index Racing for another 100 runs. After that we retire the frictions, they start breaking. The steel/aluminum plates can usually get used longer with very thorough inspections. This was our results & I consider our clutch management program one of the best. Never bead blasted the steels, but don't see why it wouldn't work. As for cryo treatments, didn't see a difference on the steel plates. All of our aluminum plates were cryo treated & hard coated. I consider this a must for the aluminum plates.

No shit, LOL! Not my headache anymore, the boys do their own tuning.

Angel is riding, but you never know? We are having problems getting it to 60' on sand. Why not get it worked out on the asphalt. It worked with the 7mm, so I figured we would give it a try. It has been 3.60 @ 92 mph in 300', but have a hard time getting it to 60'.

I'm still alive & the DMX is also. It's going into our asphalt chassis for some 1/8 mile & if we are lucky 1/4 mile testing. This is going to happen in early Sept. hope to post up some results shortly after.

I forgot to add, I've been 1.31 in 60' on both asphalt & sand @ 230+ lbs. & a heavy quad with that 14" over arm.

12" - 14" over with your weight you will have plenty of hook. Tedder mainly runs a 12 over & I run a 14 over. We ran a 8 over initially, not the way to go!

I wish it was that easy, LOL! It takes a bunch of work to launch quickly with a 2.11 or 2.12 ratio. Mainly clutch tuning, but all other tuning factors have to be spot on also. Here's the best advice I can give. Front sprockets are the cheapest to buy. 18 or 19 tooth flip a coin neither will be optimum for the 41 rear. Anyway around it, it's going to be a compromise of launch or mph. I'll always lean toward the launch; lowest ET wins races, period. 18/41 (2.28 ratio) will minimize a possible bog/give a decent launch. 19/41 (2.16 ratio) good possibility of a bog/slow launch, but have some mph. For a rookie asphalt member I would start with the 2.28 ratio. If you think your better than average rider & can slip the clutch good with your left hand. Then go with the 2.16 ratio. The final tidbit: MINIMUM final gearing needs to put the motor at it's PEAK HP RPM @ finish line in the top gear your using for the set distance. Example: If your motor makes peak power @ 9,700, you minimally want to cross the 1/8 mile @ 9,700 in 5th gear. Real world, MOST motors/bikes are faster being final geared above that peak HP RPM.

We have mostly ran the Banshee double outlet Pingel. Only ran a guzzler within last 4 years because it came with the tank.

With big bowls, pingle & proper venting should be no problem for 1/8 mile on gas or alky. We ran our 443 Cub 1/4 mile with no pump on gas & alky. We have ran all the distances out to about a mile. The farther you go, you need less timing & more fuel.

We ran very close to that with or stock cylinder gas 417 & it was our go to gear for 443 gas cub.

Glad I was missed, LOL! I've been lurking for a while. We bought another house & have self imposed no TV or Computer there for now. Plus, with my work I'm not allowed a cell phone or internet. I happened to be at our old house sick today & looks like tomorrow also. Decided to pass on a little info. Angel has taken over all the quad shit & It's very nice not having the headaches anymore.

We used a 17/36 (2.12 ratio) for both the 1/8 & 1/4 mile using a 2.86 primary with 20" AR's. We use 5th gear for 1/8 & 6th for 1/4 mile & turned a bunch of rpm for both distances.

Here's my take on the big jockey racing their own quad. My one son & I are 220-230 & the lightest son is 180. We race the hill, 300' & asphalt racing heads-up, bracket & index. We are competitive in all classes & have won in all. Our bikes with heavy rider's are not the fastest, but they aren't slow by any means. The only place we race & use a lightweight jockey is heads-up in Gilbert, LA.

Sounds like you are having fun. Here's my tips that have been hit on by other's already. Plain & simple the only gear to launch in on asphalt is 1st gear! IMO. your 15/42 (2.80 ratio) is not correct. A cheap test would be buying 16 tooth front sprocket, getting you closer to what you need. That would change your ratio to a 2.62. That would help you with less wheelspin, then you can make smaller adjustments with the rear sprocket to fine tune the rpm. Clutch/lock-up tuning worth its weight in gold. (see pinned thread at the top of Drag Section) Get the AR tire in SD23 compound, they will make a big difference in lowering your ET. Hint: don't be afraid to run a smaller dia. rear tire. Some of the fastest quads in the country run a 18" dia. rear tire with bigger motors than yours. You did a fine job being your 1st time out, no reason to be disappointed. Have fun with it, getting caught up with going faster can take the fun out of things & lighten your wallet a bunch.

This is a key statement & we use it on most of our race platforms! Learned that trick from a well known old school car engine builder. I've posted the article on BHQ before, it's a great read & can repost if needed.

Wow, got some other people discussing on this subject. Including the Great Tedder, that was the last person I thought would share his clutch info. Anyway, it's good that other member's are sharing their clutch info. That's what I hoped would happen! Maybe some more advanced info will come out, but I'm taking mine to the grave. LOL!

I started with a purpose built 1/4 mile asphalt quad. No one had a clue, builder's or BHQ member's. Most still don't when it comes to asphalt. Heck maybe I don't either, but have some good numbers to back it up. Anyway, I got called out/challenged to put it on sand for hill drags. While it wasn't the fastest quad, it beat most up the hill on the big holiday weekends. Then somehow, a few BHQ member's got their feathers ruffled; including myself. I was challenge that I couldn't make a 3 second run within my 1st 3 passes on 300' sand/dirt. My 1st pass ever on 300' was a 4.01 & I weighed 230 lbs. 2nd pass, after a few minor adjustments & my lighter Son (180 lbs.) it went 3.92. I had one pass left with me on it to get into the 3s & got it with a 3.99! The bike got faster the more runs we made on 300'. This was all done with the same chassis, motor set-up & transmission we started with for 1/4 mile asphalt. The key items in precedence besides paddle tires; #1, Gearing, #2 the shorter the distance; the more aggressive you can get with the tune-up. The final & most important key is using your brain for your combo. I find it funny how BHQ member's regurgitate info, but have no hands on experience/clues actually doing it. I still don't have a clue, but at least I've done it!

Tedder & Myself have been in the high 9s on occasion. Tedder did it with a 4mm Cub on Alky & I did it with a 7mm Cub on Race Gas. It would be nice to know the Rider weight & depending, the 8" extended swing arm is too short IMO.

^^^^THIS^^^^ We ran a 443 Cub on the dunes with clutch tuning. It carried the wheels 6-8"s with a +8 arm, shocks & 14 paddle haulers. The bike ran 3.80s on the track with struts & wheelie bar, bike was no slouch. The clutch tuning thread is pinned in the Drag Section & it was authored by myself. Lots of great info, in my opinion. LOL!

There was plenty of negative comments on the chassis at the BAKO Sand Drags. They didn't have much to say when it started winning. The design was all Angel's idea & he was thinking outside the box. I have to admit, I wasn't on board with all of the design. Anyway, there are a few bars we are changing/adding & he did take my advice, LOL!

There was some binding issues from the welding & like Green said adapter plate issues. I'm happy that the majority of issues, besides the cases. Have gotten fixed. The biggest problem we have now is the 90 ft. lbs. of torque!

Yes, with a bunch of other changes.

I wish, 230 lbs. race ready. I didn't go to the debut race, but Angel didn't say anything about staging problems.

After having a great outing with the DMX @ the BAKO Drags. A few changes are being made to the port timing & a few bars being changed in the chassis. It goes to Dome Valley next weekend for testing. Here's a pic of the new chassis.