F2T with blow by??????

The thing is, gimpy, you're at such low power levels that it doesn't even really matter all that much. If you were planning to make 300+hp from it on 20psi sure, mod away, but at moderate levels of power, I can't see the cost to benefit ratio being very good. Cost = your time. Benefit = more power/more efficiency. Possible benefit being more satisfaction/pride - only if this last one is big enough should you bother doing more than just throw it back in.

Another thing to consider is :

When you are planning to modify chambers and such, you always do that BEFORE you have the head planed. Now that it's done, you are risking screwing up the surface while working - not good.

Just my thoughts, ignore at will :-)

Fred.

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Fred, while it will not make 300 hp. it does do close to a hp per cu. in.When I was a lad this was the Holy Grail of engine builders,so I think any little thing I do that will help it live a little longer is worth a look.(And the little fella did well @ 90,000 miles)Actually all said and done the Mazda engineers did a very good job on this engine.
As for any work done to the chambers now will have to be done carefully, and by hand(like working on injection mold cavities)No die grinders allowed!!!Only tools used will be rifflers(small hand files borrowed from my place of employment)
I should have new pistons here on Fri. or maybe Sat. and I can get started @ reassembly.
Gimpy

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If your not breakin' things your not trying hard enough!

Thats what I thought when I first read his post about oil coming out of the filter on the valve cover.

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BriankMizell's Stereo Build

1hp / cu inch??? LOL, gimpy, times have changed man. The fe3 makes 20% more than that without boost. In stock trim I'd describe it as totally unstressed. You should be making around 200 - 250hp at the crank with upped boost depending on tune and turbine housing size. The holy grail is now 8 or 9 hp per cubic inch and stock engines can usually survive at around 4 just fine :-) Mine is 3.7 or so and doing fine on stock guts :-)

Gimpy, if you are really going to do this work by hand, can you setup a webcam with frame/10s recording or something like that? You can make a sweet time lapsed video of it all then. Vids done like this always look cool :-)

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Lol, I think most NA hondas are pushing 1.75-2.0 hp/ci right out of the box.

Heat doesn't just magically disappear in an engine, if it is not going into the coolant or out the exhaust then it is going somewhere else in the engine. In this case it is the air fuel mixture, when the air fuel mixture comes in contact with the hot areas of the engine those areas are cooled and the a/f mixture is heated. This is compounded by the fact that the mixture heats up considerably from being compressed.

Below is a markup I made based off of a diagram found in "Engineering Fundamentals of the Internal Combustion Engine", Page 315, Figure 10-2. Figure 10-2 in the book displays typical cylinder, coolant, piston, and combustion chamber temperatures in most spark ignition engines operating at steady load. Numbers with a ~ in front of them are my own educated guess based on the temperatures of the surrounding features in the diagram.



The auto ignition temperature of gasoline is somewhere in the range of 240-280 deg C depending on octane and a number of other variables. Before comming in contact with the mixture the sharp edge will be the hottest, and when coming in contact with the mixture it will cool at a very fast rate as it transmits it's heat into the fuel, and auto-ignition occurs. The book rarely talks about turbo engines so I'm assuming the temps above are for an average non-turbo engine.

The reference to your FE3 is not a relevant comparison for detonation, it uses one of the most detonation resistant combustion chamber designs in production cars today, the pentroof design of which an entire chapter could be written as to why and many of those reasons are related to the lack of hot spots.

References to power output are also a cop out since you can detonate just about any combustion engine under the right conditions regardless of it's output, all I have to do to prove that is mash the gas in my truck one time.

*Sharp edges around the valves were not marked because removing them undoubtably provides both a performance and reliability gain.

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Whatever, I give up.

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you got your valves backwards k6

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93 b2200 F2t swap build thread sold
92 B2600i with a 82 3.0L 5cyl 617 benz Turbo Diesel build thread
91 b2200 fully airbagged, 4 linked, 1/2" lines, lays frame rebuild thread sold
91 b2200 v8, toy axels, 39" tires thread sold
91 EF Si, B18a1 swap, etc... build thread

'̿ ̿ ̿'̿'\̵͇̿̿\з=(•̪●)=ε/̵͇̿̿/'̿'̿ ̿

Fred must have picked up on some of the down home american hospitality when he was here a while back.

LOL, some of his last post it seems it gets agitated a little. I didnt notice him being that way before.........lol

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BriankMizell's Stereo Build

This was the first thing I noticed too,but that is the side that had the damage on the piston& still has me pondering.I suppose that it detonated ahead of the flame front(I'm sure that my timing is likely a little advanced under boost,but won't know for sure till I get the battery hooked back up)
Neat mark up, K6.Thanks, makes things a bit easier to visualize.
As you can see from the pics the edges need to be deburred,I will likely put at least .030 in. rad. on most,more on the edge behind the intake valves.
I guess I dated myself with the comment about 1hp/cu.in. thing,huh?3 valves better than 2, not as good as 4!!!!!!
Fred ,I like the idea about the time lap vid,but I don't suppose it will not happen.I do pretty **** good just getting a pic posted.A question to you about toluene.Are you running that straight up? or a blend?Inquiring minds want to know.
Gimpy

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If your not breakin' things your not trying hard enough!

yah, just make sure when the pistons go back in the small reliefs go on the intake side, and the big reliefs go on the exhaust side.

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93 b2200 F2t swap build thread sold
92 B2600i with a 82 3.0L 5cyl 617 benz Turbo Diesel build thread
91 b2200 fully airbagged, 4 linked, 1/2" lines, lays frame rebuild thread sold
91 b2200 v8, toy axels, 39" tires thread sold
91 EF Si, B18a1 swap, etc... build thread

'̿ ̿ ̿'̿'\̵͇̿̿\з=(•̪●)=ε/̵͇̿̿/'̿'̿ ̿

Sorry, it was close to 1 am I was tired and eager to get to bed because I leave for work at 6 am now instead of 7:30. The red lines are simply my opinion of the most critical areas, temperatures with ~ in front of them are also my interpretation and all of those numbers will vary from engine to engine. I will scan the original figure from the book so anyone wishing to make their own conclusion can do so without my beliefs attached and fix the picture.

Fred is just ticked because I've been backing my opinions with credited sources that are hard to question.

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Most pistons are marked stating wich way goes towards the front of the engine. Rods usualy have a marking also stating wich way is front or possibly wich way it rotates.

Now again if you have fruit cake machinist that puts the rod on the piston backwards (this happened to me once) it was sort of my fault, I should have thoroughly checked them before I installed them.

But anyways if that happend then you would have to make sure wich valve reliefs are pointed where.

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BriankMizell's Stereo Build

yah, i would like to see some fe3 pistons side by side with some f2 12v pistons, they are probably almost exactly the same, just installed the opposite way.

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93 b2200 F2t swap build thread sold
92 B2600i with a 82 3.0L 5cyl 617 benz Turbo Diesel build thread
91 b2200 fully airbagged, 4 linked, 1/2" lines, lays frame rebuild thread sold
91 b2200 v8, toy axels, 39" tires thread sold
91 EF Si, B18a1 swap, etc... build thread

'̿ ̿ ̿'̿'\̵͇̿̿\з=(•̪●)=ε/̵͇̿̿/'̿'̿ ̿

right here ken, they named the f2t and 8v pistons backwards lol
Solomiata : Interchange : FE3 motor

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92 b2200 working on f2t swap "project"
92 b2600i 4x4 mud toy (5" of lift 33" mud tires) sold
05 gmc sierra slt fully loaded

hmmmmm odd.

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93 b2200 F2t swap build thread sold
92 B2600i with a 82 3.0L 5cyl 617 benz Turbo Diesel build thread
91 b2200 fully airbagged, 4 linked, 1/2" lines, lays frame rebuild thread sold
91 b2200 v8, toy axels, 39" tires thread sold
91 EF Si, B18a1 swap, etc... build thread

'̿ ̿ ̿'̿'\̵͇̿̿\з=(•̪●)=ε/̵͇̿̿/'̿'̿ ̿