- Joined
- Dec 3, 2009
- Messages
- 22,403
- Reaction score
- 238
- Location
- Van Nuys Ca.
- My Bike Models
- 1983 Interstate
2018 KLR 650
2018 BMW S1000 RR
- My Bike Logs forum link
- https://classicgoldwings.com/forums/dan-filipi.122/
I had an idea a while back for runners.
My thought is the volume of fuel air mixture needs to be reduced so I'm going to try something.
1" runners.
I read a short thread at Goldwingowners.com where jonfrabitoy was calculating the air mass/volume and runner lengths of the stock rack then converting to an equal mass for the longer runners running a single center plenum.
It made sense to me so this is what I'm going to try:
This pipe is 1" EMT conduit that I've fitted to one of the harder offset runs into the VW plenum.
The pipe fits loose enough in the plenum outlets so it's fairly easy on this runner to get a straighter shot to the head intake port.
The other side (#1 cylinder) requires more of an offset still. I might have a chance in the next couple days to test fit the other runners.
What I like about this so far is I get a straight dump into the cylinder doing away with the 90 degree turn in the intake horns and leaky hard rubber boots. And it's the shortest possible runs.
The runners will be sealed at the plenum by whatever means I have at home. It may not be pretty but it will be air tight.
At the head I'll be making flanges from plywood then sealed with gas resistant silicone.
From this thread forward, I'm making permanant flanges and adaptors to the plenum.
My thought is the volume of fuel air mixture needs to be reduced so I'm going to try something.
1" runners.
I read a short thread at Goldwingowners.com where jonfrabitoy was calculating the air mass/volume and runner lengths of the stock rack then converting to an equal mass for the longer runners running a single center plenum.
It made sense to me so this is what I'm going to try:
This pipe is 1" EMT conduit that I've fitted to one of the harder offset runs into the VW plenum.
The pipe fits loose enough in the plenum outlets so it's fairly easy on this runner to get a straighter shot to the head intake port.
The other side (#1 cylinder) requires more of an offset still. I might have a chance in the next couple days to test fit the other runners.
What I like about this so far is I get a straight dump into the cylinder doing away with the 90 degree turn in the intake horns and leaky hard rubber boots. And it's the shortest possible runs.
The runners will be sealed at the plenum by whatever means I have at home. It may not be pretty but it will be air tight.
At the head I'll be making flanges from plywood then sealed with gas resistant silicone.
From this thread forward, I'm making permanant flanges and adaptors to the plenum.