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Discussion in 'Motor' started by Jeff Taylor, Apr 29, 2016.
UPDATE: Seems after my top end rebuild (cometic gaskets and heads milled .030 for a total drop of .053), the pre-ignition no longer seems to be occuring... or at least I really don't hear any pre-ignition now!
I recently installed the TH programmable ignition on my 05 117. I have V&H pipes. Before the bike would strain to get to and above 4500 rpm. Now it pulls through 5000 and is smoother at it.. I try to stay above 3k but did not notice much difference between 2500-3500. 585 cam next.
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I did the opposite, 1st was the 585 and that was huge, and you will hear the difference the first time you fire up the bike with that cam in it, I installed the TH at the same time I did the 585 cam. I'm waiting until I come across a Dyno to try the different timing settings to see the results.
There it is! The absolutely craziest idea on here ever. We all know that TP rocker boxes are way faster than S&S boxes, just like silver paint is way way way faster than red ones. Come on man.....
Ever heard of a XXX carb? Add the Tasmanian Devil to it and with a new cam as suggested above you'll have enough power to not being able to hang on to the bike.
I know, no more new XXX, but there is plenty of them out there....
OK, remember, there are two variables here, Horsepower and Torque. Horsepower is defined as how fast your are going when you hit a brick wall. Torque is defined as how far you travel through the wall after hitting it.....
What do you mean open up the exhaust and inlet,I fitted the 585 cam and ignition,and getting really bad backfiring.thx Malc.
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Aftermarket intake (usually the mounting plate), bigger carb jets, and exhaust that allow more air/fuel into the engine and more exhaust out. Compliance with EPA regs on stock intake and exhaust require restricted (and lean) air/fuel flow through the engine for optimal (EPA) emissions. Putting on pipes with less restrictive baffles (louder too) and a larger intake capacity increases power.
If you put in that cam and exhaust, the rest should have been done too.
Decel popping has defeated better men than me, and is an oft-discussed topic on the Forum. Any search will find lots of threads addressing it. It can be due to any of a number of factors including timing, loose intake manifolds (leaks), improper carb jetting, and so on. I simply learned to appreciate decel popping-- my bike runs great with a TH, 585 cam/V&H 2-2.
I also added the Dual runner when I installed the 585 also and it sounded like a machine gun accelerating and decelerating, I also had to rejet the carb and I used S&S's carb guide lines for setting the carb. And I removed the bowl vent screw
I had some additional head and valve work done, added a 630 Woods cam, dual runner and V&H 2-2.
585 installed and like the ignition installed a couple weeks ago it provided improvements. Longer flatter torque curve and minor power increase. The smoothness both low, mid and high rpm are not minor. 4500 rpm is now smoother than 3k was before the two upgrades.
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Do you have a dyno sheet to see the improvements?
Noy yet. But, before the engine would gasp for air and fuel above 4500 it now pulls smoothly through 5500. Thr power gain may be greater than what I feel, but even without power gains the bike rides considerably better than before. Curtis recommends I get the dyno and I woll soon. I need to decide if I am going to stay with the E carb or switch to Mikuni before I dyno it. I don't want the expense of switching manifold and G carb. I am hoping a Mikuni 45 will fit and get the job done. I don't have plans to do heads or 600 cam.
The guy who builds the xxx taz carbs sells them on eBay he has 4 different carb models to choose from depending on how extreme you want to get they are all built out of super G or Ultima R1 crabs. Also installing a set of big city thunder baffles can help with the decel pop they sell online for $79.99 you also get a lot better sound with them also and they help improve your torque curve.
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I gotta ask ya, how is your low end with that 630 cam Douggy? And are you like the other wankers around here that install cams and never rev it past 4,000 rpm? It just seems like anything over the 585 would be useless unless your gonna build it up to rev the shit outta it, my 585 pulls like hell with no end in sight right to the rev limiter which is supposedly 6,250 rpm!
That explains a lot, when are you going back in to get the rest of it fixed
That's why your replacing head gaskets