Twin Cam 88B Night Train Specs
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Stage II
Joined: Jun 2009
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Twin Cam 88B Night Train Specs
I obtained a 2004 Night Train with 4000 miles on it. As far as I know it only has a K&N filter fit into the standard air box and Samson Short Slashers.
I went to a local dealership for a free 4th gear dyno and my numbers came out to 72hp and 79ftlb between 4000 - 5000 RPM. However, the air/fuel ratio was somewhere around 18. I checked my plugs and they have a white/tan residue, so I'm not worried about running lean. I also did a compression test and it came out to 145PSI.
Can anyone else share their specs/numbers on a 1450CC motor?
I went to a local dealership for a free 4th gear dyno and my numbers came out to 72hp and 79ftlb between 4000 - 5000 RPM. However, the air/fuel ratio was somewhere around 18. I checked my plugs and they have a white/tan residue, so I'm not worried about running lean. I also did a compression test and it came out to 145PSI.
Can anyone else share their specs/numbers on a 1450CC motor?
Novice
Joined: May 2009
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I recently picked up this 2004 NT (pictured) It has a Stage I with SE II's and we just turned 13000 miles. It runs like a raped ape so (without numbers to provide) I'm more than satisfied. I love the 88b motor. Congratulations. How about a pic of your '04?
Elite HDF Member
Joined: Apr 2009
Posts: 3,928
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From: Desert S. West
It was probably reading 18 because of the short pipes. Mine did the same thing but we knew it was 14.6. The short pipes suck some air back in causing a faulty reading from the sniffer. We pushed the sniffer in as far as we could but it was still pulling air back to it. The dyno guys like the 2-1 pipes because they can always get a better reading.
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Stage II
Joined: Jun 2009
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Here is the pic. I know what you mean about running like a raped ape, it pulls hard through all 5 gears .
That's an interesting observation Boomer. Also, what I've been reading is that increased diameter drag pipes might actually decrease the air coming into the cylinder due to the lack of back pressure. Which would explain the peak torque powerband shift from the stock 3500RPM to 4500RPM, as well as the lower torque numbers from the stock 85 to my 78ftlb, since the piston has to waste power to push the air out.
I would like to get some cams, but I'm not sure if an increased intake/exhaust valve overlap would help the situation.
Any thought on the next step to increase performance?
That's an interesting observation Boomer. Also, what I've been reading is that increased diameter drag pipes might actually decrease the air coming into the cylinder due to the lack of back pressure. Which would explain the peak torque powerband shift from the stock 3500RPM to 4500RPM, as well as the lower torque numbers from the stock 85 to my 78ftlb, since the piston has to waste power to push the air out.
I would like to get some cams, but I'm not sure if an increased intake/exhaust valve overlap would help the situation.
Any thought on the next step to increase performance?
Intermediate
Joined: Jun 2009
Posts: 25
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From: Portsmouth Va
If you really want a performance increase, then a 2-1 exhaust is the way to go. Most people steer away from them due to traditional look, but they will get the best performance for an exhaust system.
HP is very simple, it's fuel and air. Increase them, and you make power. Cams help quite a bit, but if your going to tear into the motor, you might be better off figuring out your end goal, aquiring parts over the summer, and do a big install over the winter when riding time is limited.
HP is very simple, it's fuel and air. Increase them, and you make power. Cams help quite a bit, but if your going to tear into the motor, you might be better off figuring out your end goal, aquiring parts over the summer, and do a big install over the winter when riding time is limited.
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mhalla78
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