Polishing combustion chambers
Thread Starter
Racer
Joined: Jan 2000
Posts: 334
Likes: 0
Polishing combustion chambers
I have a set of stock closed chamber BB iron heads. I want to put the enging back together with stock CR of 10.25:1. I am wandering if:
- Polishing the chambers will reduce the probability of pre detonation with pupm gas?
- I can do the polishing myself ?
- If so, what should I use to do it. I have a die grinder, wandering what kind of attachment to use.
- Polishing the chambers will reduce the probability of pre detonation with pupm gas?
- I can do the polishing myself ?
- If so, what should I use to do it. I have a die grinder, wandering what kind of attachment to use.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Re: Polishing combustion chambers (clearrun)
In the old days we polished the combustion chambers but now I have seen articles where they have put punch marks in the chamber to promote turbulance. I still polish the exhaust ports but not the combustion chambers any more.
Pro
Joined: Dec 2001
Posts: 708
Likes: 0
From: Renton Wa
Re: Polishing combustion chambers (norvalwilhelm)
I was kinda curious about this too, AFR has CNC'd chambers which are much smoother than Cast Alum chambers. But at the same time, I would think that the rough spots could be kept sharp and could infact create hot spots that could in a way create multiple combustion points. Honda was working with this idea a few years back, by reflecting the spark to multiple points inthe combustion chamber, you get a much quicker more complete burn. But at the same time hot spots could create detionation
Safety Car
Joined: Mar 2002
Posts: 3,780
Likes: 442
From: Southwest MI
Re: Polishing combustion chambers (clearrun)
I have a set of stock closed chamber BB iron heads. I want to put the enging back together with stock CR of 10.25:1. I am wandering if:
- Polishing the chambers will reduce the probability of pre detonation with pupm gas?
- I can do the polishing myself ?
- If so, what should I use to do it. I have a die grinder, wandering what kind of attachment to use.
- Polishing the chambers will reduce the probability of pre detonation with pupm gas?
- I can do the polishing myself ?
- If so, what should I use to do it. I have a die grinder, wandering what kind of attachment to use.
[Modified by 66427-450, 12:42 PM 5/24/2003]
