m8 head upgrade
Grand HDF Member
Joined: Jun 2005
Posts: 3,711
Likes: 3,438
From: SW WA.
I was talking with my local indy and he has Baisley HP in Portland do some of his work.
He said Baisley told him the M8 doesn't need much in the way of headwork,the 8 valve heads already flow quite well.
Unless you're building a full on race engine it's not really of much benefit .
That's coming from one of the top cylinder head guys in the world.
He said Baisley told him the M8 doesn't need much in the way of headwork,the 8 valve heads already flow quite well.
Unless you're building a full on race engine it's not really of much benefit .
That's coming from one of the top cylinder head guys in the world.
Seasoned HDF Member
Joined: Feb 2008
Posts: 23,000
Likes: 11,441
The question is when do you stop? At some point in a search for more you have to decided whey enough is enough.
I needed a little more with the large sidecar. Not that I could have lived with doing nothing. But I want a bit more torque at lower RPM's.
Did the stage 1 and 2 at that same time. Without the extra cost and hassles of doing any head work it delivered exactly what was expected. A simple quest for a bit more does not have to turn into a major project or expense.
Kind of like a minor scratch turning in to a complete paint job.
I needed a little more with the large sidecar. Not that I could have lived with doing nothing. But I want a bit more torque at lower RPM's.
Did the stage 1 and 2 at that same time. Without the extra cost and hassles of doing any head work it delivered exactly what was expected. A simple quest for a bit more does not have to turn into a major project or expense.
Kind of like a minor scratch turning in to a complete paint job.
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,672
Likes: 11,459
From: State of Confusion
The question is when do you stop? At some point in a search for more you have to decided whey enough is enough.
I needed a little more with the large sidecar. Not that I could have lived with doing nothing. But I want a bit more torque at lower RPM's.
Did the stage 1 and 2 at that same time. Without the extra cost and hassles of doing any head work it delivered exactly what was expected. A simple quest for a bit more does not have to turn into a major project or expense.
Kind of like a minor scratch turning in to a complete paint job.
I needed a little more with the large sidecar. Not that I could have lived with doing nothing. But I want a bit more torque at lower RPM's.
Did the stage 1 and 2 at that same time. Without the extra cost and hassles of doing any head work it delivered exactly what was expected. A simple quest for a bit more does not have to turn into a major project or expense.
Kind of like a minor scratch turning in to a complete paint job.
Cruiser
Joined: Mar 2012
Posts: 161
Likes: 92
From: Connecticut
I have a '23 RGS 114, currently in the process upgrading my bike. So far, I have upgraded to a WM8-22XD cam, SE cam plate and oil pump, HPI 62mm throttle body and intake manifold, FM 6.1 injectors, Thundermax ECU, SPC 2-1 exhaust, and I had the SE elite heavy breather but going to the HPI V2 (I didn't like how far the ram intake sticks out) engine work wise. My question is, I have done a good amount of research, and it seems like almost no body upgrades heads before going to a big bore kit/increasing displacement and I don't understand why. Even a stock head that can get ported and polished would increase flow and in theory would then increase your power. More air, more fuel, more power. Anyone have any insight into this? I am sure there is a point where more power means you are ultimately going to need to increase displacement, but I'm trying to get everything I can out of my 114.
Stellar HDF Member
Joined: Mar 2017
Posts: 3,321
Likes: 1,884
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3rd Gear
Joined: Oct 2023
Posts: 7
Likes: 0
From: Fairbanks, AK
I want to take advantage of all my parts combined, with bigger injectors bigger throttle body and intake and a better flowing air cleaner and get the most out of the cam. When reading the flow charts of the most common ported heads, wouldn't you think to start matching that to the flow rates of your intake set up? get the most out of it as you can. Now I understand these heads flow a lot better than the previous, but there is always room for improvement. I am having an engine builder contact me this week to discuss this, I will update everyone with what we come up with.