Dyno baseline

Reply Subscribe

Thread Tools

Search this Thread

Oct 31, 2008 | 08:03 AM

#11

Toolguy

Thread Starter

Outstanding HDF Member

Joined: Aug 2008

Posts: 2,047

Likes: 3

From: Vancouver Island, British Columbia, Canada

Quote:

Originally Posted by robzuc97

Actually not bad numbers with the long shots; are they baffled (back pressure & pulse wave)? How's the AFR? I go with the 13.5 lean side for the HP and 13.0 rich for the torque with a slight curve up on the 4th gear roll-on toward peak adjusted using SERT VE tables for F/R cylinders. Did you shut down the O2 sensors while adjusting the AFR? It will through off your AFR numbers and I've even heard of leaving them off using the SERT maps. Also try a slight spark advance. Where you set everything depends on what you want to do, ride hard or ride smooth. Do a cruise test also from 2000-4000 slow acceleration to test AFR rideability since it will be different from WOT. Nice bike by the way!

The V&N Longshots have 1/2 baffles. The original owner had them cut down. I didn't receive any info from the original SERT tune. We don't know the AFR. Same with the O2 sensors. The dyno was to establish the baseline so I'd know how well we did with any improvements made this winter.

Nov 2, 2008 | 07:46 PM

#12

Papamte

Tourer

Joined: May 2005

Posts: 473

Likes: 8

From: Chelsea, AL

Depending on which head gasket thickness was used, you should be around 10:4 to 1 with around 220+ compression. I had a similar build on my engine with the SE 258's and mine made 94hp & 96.5tq. It was tuned with a PCIIIr.

You should be getting better numbers on your build. Not great for low end torque, but should stretch out nicely.

Jun 28, 2009 | 09:49 PM

#13

jagonza1

Intermediate

Joined: Feb 2005

Posts: 30

Likes: 0

From:

pipe are a big part of it
the cams are ok but the exhaust you have on won't produce much torque. try a 2 into 1 and you will probable pick up 10 or mor foot pounds of torque and about 5 more hp