Mike T
Well-Known Member
- Joined
- May 3, 2013
- Messages
- 1,576
Well after going back and forth I finally decided to clearance the block where the intake air sees a little ledge at the top of the bore. Not sure how much it may help but it's done.
By registering with us, you'll be able to discuss, share and private message with other members of our community.
SignUp Now!Good move Mike, I have always done mine in the same fashion.
Nice. What block is that?
Thought so.Just a 109 with forged rotating components an center caps.
Great idea!
Is this a street or race motor?
Why?
It looks like it introduces other potential problems like weakening the sealing force of the h/g in that area as well as altering the quench and compression ratio of the cylinder.
Also I'd like to know how far away the top ring from the base of the bevel?
Is this really a benefit in a boosted motor??
I know it's an old school band-aid for oversize valves in a small bore but is there proof that it's beneficial in our motors??
Thought so.
Almost looks like an AL block with sleeves from 2K miles away. Good luck!
What did you find out on the rings Mike?
I am not speaking for Mike and only sharing my perspective:
Few of us have the equipment time or money to provide conclusive and numerical evidence of the little things we believe make sense. In this case, the change (eyebrow) makes sense . . to me. Will it hurt? Not sure. Will it help? Not sure, but it makes sense.
I have obsessed ove a few things that may have hurt performance but it made sense and I felt good about it, and could care less to *measure* the improvement. It all adds up. ☺
Rob, what you are saying makes sense as well so please don't misunderstand my post.
Never met or talked to Mike but from following his threads on the DP, head porting etc., his enjoyment appears to be in creating and trying things. Luckily for us, he chooses to share those publicly fully understanding he may get ridiculed.
There is a lot to be said for that.
Rob I think your questions are all reasonable and quite honestly I can't give a definitive answer on some of them. I understand your point that the heads and block as cast from the factory can make huge power by changing valve events, adding boost and so on. This is a proven fact but I've chosen a little different path with this motor. I've said in other post that this one is my personal "lab rat" and I'm having fun with it.
To sum this motor up it will have a CR in the lower 8-1 area, middle of the road roller profile that's been around for a while and heads that are somewhat unique in chamber design. The basic idea has been to straighten out any irregularities that may impede flow.......preliminary flow testing of the heads has been both promising and rewarding.
Jerryl has pinpointed the motivation for most of my post. I like to post photos of small projects that I'm working on with the hopes that it may spark a worthwhile conversation or give someone a visual of something that they may not have seen before or fully understand.