N14 Side pipe option

[Stephen L.]

Re: N14 Side pipe option



I enlarged the sections of the DEALER PURCHASE ORDER post earlier. Hopefully these will have clear print..... The top is for 1965, middle is 1966 and bottom 1967....

Steve

[Duke W.]

Re: N14 Side pipe option

I believe PG could not use 2.5" pipes due to clearance issues with the transmission, so that would mean that the off-road system would not be available as shown on the order sheets, but there was no technical reason why side pipes couldn't be ordered with PG.

Duke

[Gene M.]

Re: N14 Side pipe option

After additional research and reading I believe that for the year 1965, base/300 HP engine with auto could NOT get side pipes from the factory. But this changed for 1966-67. Apparently the 1966 and 1967 Judging Manuals used what the 1965 JM had to say on this subject and copied it without research...........and are therefore wrong as currently written.

This makes the most sense and agrees with our experts (JohnZ, Duke, Noland etc). FWIW. I have no dog in the hunt.

Larry

Agree with your finding in addition the 65 base engine standard 3 speed transmission did not offer side pipes. This is based on the 2 1/2” manifolds on performance engines vs the 2” manifolds on the others. This 2” omission deal is only for 65. After that 66-67 the manifolds were only 2” thus the side pipe diameter change.

Hopefully John Hinckley will chime in with more resolution to this discussion.

[Peter Z.]

Re: N14 Side pipe option

As an aside I bought a new 67 L79 with the N11 option. I soon converted to the N14 side exhaust. Everytime I went through State inspection (14years) I had to put the "Off Road exhaust" back on to pass inspection...

[Duke W.]

Re: N14 Side pipe option

Are you aware that sidepipes are more restrictive than either the base or Off-Road system. They reduce top end power by 2-5 percent, and the higher the horsepower engine, the greater loss of top end power.

In terms of low restriction and good sound without being excessively loud or having resonant droning the Off-Road system can't be beat.

Duke

[Peter Z.]

Re: N14 Side pipe option

When I bought my 67 L79 new I had the N11 option, but I wanted the N14 sound. So I installed the N14 and immediately said to myself that the car feels slower....

[Duke W.]

Re: N14 Side pipe option

To some, louder feels faster. Case in point. I bought a '83 Honda CB1100F along with a buddy who worked for Honda as a fabricator, and he was very good at it. He immediately began modifying his bike with a Kerker 4 into 1 exhaust to replace the OE 4 into 2 exhaust with a cross over ahead of the mufflers, and he also installed individual air cleaners on the carbs in place of the OE air box and filter that feed all four. I told him both mods would loose power.

He also took about 50 pounds off with Dymag wheels and other lightening efforts and Dick weighed 140 pounds dripping wet compared to my 180.

All I did to mine was increase the idle jets from .35 to .37 mm, reset the idle mixture, and shimmed up the needles 20-thou to get rid of the idle/off-idle lean condition that caused an annoying driveline jerkiness at light throttle, and we both replaced the OE 42T rear sprocket with a 44T.

So after we did all the mods we were on a ride out in the boonies on CA state route 33 and did some roll-ons. It was a dead heat every time! So his power loss was offset by his 90 pound all-up weight advantage.

BTW, after the changes I made those four 33mm CV carbs were absolutely perfect and as good as any FI system as far as throttle response and modulation is concerned at any RPM and power setting. Another buddy who took it for a ride on I-10 near Redlands blew off a Pantera in the process and nicknamed it "The Starship". Bike mag tests yielded 11-flat quarter miles at 120 MPH. The name was well deserved.

Duke