Dyno Jet kit 95 EVO
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Joined: Apr 2006
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From: Queens, NYC
Dyno Jet kit 95 EVO
I am in the middle of jetting my stock carb, It had a 170 main jet in it, and the kit came with a 180 and 190, I do not know which to use?
I have a 95 Roadking police package:
Screaming Eagle Airbox
Police Module
Accel ignition
8mm wires
Platninum plugs
It was cammed but I do not know what the numbers are on it.
Samson Torque cones
Vance and hines tru duals and no baffles
So should I use the 180 or 190? I have the 180 in but I have not put it on the bike yet, but if I am going to get more benifits with a 190 I will put it in...
Please let me know.
Gio
I have a 95 Roadking police package:
Screaming Eagle Airbox
Police Module
Accel ignition
8mm wires
Platninum plugs
It was cammed but I do not know what the numbers are on it.
Samson Torque cones
Vance and hines tru duals and no baffles
So should I use the 180 or 190? I have the 180 in but I have not put it on the bike yet, but if I am going to get more benifits with a 190 I will put it in...
Please let me know.
Gio
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Joined: Mar 2006
Posts: 85
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From: London, Ontario
RE: Dyno Jet kit 95 EVO
Gio,
First off, put some baffles in those pipes. Unless you at wide open throttle all the time, you're not doing anything for the performance of your bike. ANY engine needs a certain amount of back pressure to run properly at part throttle. Loud does not always equal fast. You'll be losing torque as well.
As far as the main goes, the only really way to tell is to ride the bike and see how it does with the 180. All of the following is in various spots in the forum. Find an open and rarely travelled back road, get the bike into 4th gear. Take the bike to full throttle and then roll off the throttle about an 1/8th turn, if the bike seems to accelerate or surge you're lean. If it bogs, you're rich. What you could do is find a shop with an exhaust gas analyser and some who knows how to use it and figure it out that way.
First off, put some baffles in those pipes. Unless you at wide open throttle all the time, you're not doing anything for the performance of your bike. ANY engine needs a certain amount of back pressure to run properly at part throttle. Loud does not always equal fast. You'll be losing torque as well.
As far as the main goes, the only really way to tell is to ride the bike and see how it does with the 180. All of the following is in various spots in the forum. Find an open and rarely travelled back road, get the bike into 4th gear. Take the bike to full throttle and then roll off the throttle about an 1/8th turn, if the bike seems to accelerate or surge you're lean. If it bogs, you're rich. What you could do is find a shop with an exhaust gas analyser and some who knows how to use it and figure it out that way.
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Joined: Apr 2006
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From: Queens, NYC
RE: Dyno Jet kit 95 EVO
Thanks Pauly,
In terms of the back pressure and the baffles, that is why I put in the torque cones, that should give me enough back pressure. I had done the same thing with my xl1200s and the bike ran fine with the cones and no baffles, but if it acts up I will put them in.
Gio
In terms of the back pressure and the baffles, that is why I put in the torque cones, that should give me enough back pressure. I had done the same thing with my xl1200s and the bike ran fine with the cones and no baffles, but if it acts up I will put them in.
Gio
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RE: Dyno Jet kit 95 EVO
I've been building HDs for over 20 years and after performing hundreds of dyno tests, I have determined that torque cones are just "snake oil". Open pipes of any kind will kill your performance, especially at low to mid range rpms. That is a well known FACT. I have done many comparisons on the dyno using torque cones, thumbscrews, and other so-called fixes, and none of them make any significant improvement in performance. It's not just about back-pressure, it's about reversion, which can actually damage your engine if it's bad enough (thermal shock to the heads). A properly designed exhaust system will prevent reversion from becoming a problem. If you can put your hand near the end of the pipe and feel it trying to suck your hand towards it while idling, then you have a big problem (usually the rear pipe). It'll be even more noticable if you have a cam with a lot of overlap.
Unless you are running it at over 5000 rpm all the time, you will need baffles to get the bike to run properly. Louder does NOT mean better performance! Right now, you are missing out on a lot of "streetable" torque, meaning torque in the 1500-3500 rpm range! A good dyno-tune will also make a world of difference. It's also VERY difficult to tune a bike that has open pipes, and while it's possible to jet the carb yourself, you will be very lucky if you get it right throughout the entire range of operation. It will take a empty back road, as Pauly said, and several high speed runs with several sets of new plugs to get it done right. That's my 2 cents....
Unless you are running it at over 5000 rpm all the time, you will need baffles to get the bike to run properly. Louder does NOT mean better performance! Right now, you are missing out on a lot of "streetable" torque, meaning torque in the 1500-3500 rpm range! A good dyno-tune will also make a world of difference. It's also VERY difficult to tune a bike that has open pipes, and while it's possible to jet the carb yourself, you will be very lucky if you get it right throughout the entire range of operation. It will take a empty back road, as Pauly said, and several high speed runs with several sets of new plugs to get it done right. That's my 2 cents....
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Joined: Apr 2006
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From: Queens, NYC
RE: Dyno Jet kit 95 EVO
Thanks so much for the indepth explanation, it is what I needed. I do not have the pipes on yet, I have the header on with the torque cones but have not yet recieved the mufflers, and when I get them I will keep the baffles in.
Now my next question, do the torq cones help or should I just get them out? Are they overkill if I am going to run the baffles on?
Gio
Now my next question, do the torq cones help or should I just get them out? Are they overkill if I am going to run the baffles on?
Gio
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RE: Dyno Jet kit 95 EVO
If you are installing baffles, then you won't need the torque cones. They don't make enough of a difference to notice, even on the dyno. I have a drawer in the shop half full of them that were removed from various bikes. Heck, maybe you can get a few bucks for them on ebay.
Here's a link to a very good exhaust testing table. These guys put a lot of time and effort in finding the best (and worst) exhaust systems for a Harley. The ones with the highest "Street Power Ranking" will give you the best tree stump pulling mid-range torque... that's the torque that stretches your arms when you twist the throttle! The are a few 2-2 systems that score well, but the best are still the 2-1 systems.
Here's a link to a very good exhaust testing table. These guys put a lot of time and effort in finding the best (and worst) exhaust systems for a Harley. The ones with the highest "Street Power Ranking" will give you the best tree stump pulling mid-range torque... that's the torque that stretches your arms when you twist the throttle! The are a few 2-2 systems that score well, but the best are still the 2-1 systems.
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Joined: Apr 2006
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From: Queens, NYC
RE: Dyno Jet kit 95 EVO
I do not see the website you are refering to? Also I think you deleted the dupe cause I dont see it....
The frickin vance and hines mufflers are back ordered til next tuesday, I put the headers on 2 sundays ago expecting them to come in this week, can you feel my pain? I live in south florida and it is going to get too hot to ride during the day pretty soon.
gio
The frickin vance and hines mufflers are back ordered til next tuesday, I put the headers on 2 sundays ago expecting them to come in this week, can you feel my pain? I live in south florida and it is going to get too hot to ride during the day pretty soon.
gio
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RE: Dyno Jet kit 95 EVO
Sorry... I forgot the link. Here it is: http://www.nightrider.com/biketech/exhaust_test_01.htm. If you want a good laugh, look at the street power ranking for the HD 2-1 pipes. Not very impressive.....
My dupe post is still there, I just edited it to say "Somehow made a dupe post. Is there a way to delete it? Thanks"
My dupe post is still there, I just edited it to say "Somehow made a dupe post. Is there a way to delete it? Thanks"
Thread Starter
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Joined: Apr 2006
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From: Queens, NYC
RE: Dyno Jet kit 95 EVO
I got my pipes! One question, what difference if any does the heat wrap/isulation around the baffle? Is it to make it quieter or is it for performance?
Spectrexx...Thanks for the site. I still dont see the dupe post.. lol... I think only you see it......
Spectrexx...Thanks for the site. I still dont see the dupe post.. lol... I think only you see it......