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Author Topic: Mazda - FE DOHC 323 Restore  (Read 12970 times)
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jdmmonkey
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« Reply #150 on: August 10, 2011, 07:33:50 AM »

 Cool Come on - you and I both know it looks like a puddle of sand poured through a spark plug hole. I guess whoever did this thought I'd start it right up? Didn't know you could build a motor without opening it . . .

Like you say, no harm no foul.
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« Reply #151 on: August 10, 2011, 08:38:42 AM »

hehe ... Huh i dont know anything... lol i work in IT
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« Reply #152 on: August 19, 2011, 01:04:24 PM »


A sneak peak into the port work stage. Only beginning stages here, still lots of machining to do. We've hit a bit of a snag though, I'm short 16.85mm on the valve length - without giving too much information away on the build, i'm also converting the head to solid lifter configuration - but not modifying the original buckets.

Doing some shopping this weekend it seems, need 120mm total length with a 6mm stem diameter. You should know at this point that not too many exceed 104mm. The other side of the coin is excess valve length - high RPM usage is a concern.

Come to think of it... only place I recall 120mm length valves is in a air compressor Tongue
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« Reply #153 on: August 22, 2011, 02:20:49 PM »

After doing some more measuring, I really need the lift - so decided on manufacturing custom valves.
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« Reply #154 on: August 23, 2011, 07:15:33 AM »

Custom = Good Smiley ... but pricey..
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jdmmonkey
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« Reply #155 on: August 23, 2011, 07:59:08 AM »

Price - Reliability - Quality. Not skimping on the build. Fortunately I've got a hell of a lot of machining resource and materials to play with - the sky really is the limit.

Side note, and there will be an official posting at some point - you're looking at the new Pauter Rod dealer for South Africa :-) They are more expensive than other brands but hell they are good and using them in my personal build.

Visit them some time - not the best of sites but look past that and do some research http://www.pauter.com/
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« Reply #156 on: September 06, 2011, 12:55:46 PM »

Some great news worth mentioning and something all FE DOHC owners, including myself, hold their breath for when removing the sump is whether or not you're the lucky guy to own a block fitted with the bearing braces / cradles as found on some harder to find motors.

Being in that postion very recently and seeing bearing braces stairing right back at me - was a huge relief for this high rpm build. If it wasn't fitted with any - it would have meant further development. Although not rocket science - a lot more cost that could otherwise be spent elsewhere in the search of even more power and reliability.

Will be sure to post up a pic a little later when there is time (bad quality though).
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« Reply #157 on: September 06, 2011, 01:02:05 PM »

Bad quality or not,please post  Smiley
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« Reply #158 on: September 07, 2011, 07:56:39 AM »

As promised, the bad quality pic.

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« Reply #159 on: September 07, 2011, 08:04:04 AM »

Thanks,when u do strip down the motor can u check what's casted on the conrods,I have seen some with fn2 and some with fn7 casted above the big end
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« Reply #160 on: September 07, 2011, 10:41:44 AM »

Will do, excuse my ignorance though, the difference between the castings FN2 and FN7? weight, oiling channels?

The pistons (high compression) and rods will be for sale if anyone would like them.
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« Reply #161 on: September 07, 2011, 10:58:26 AM »

Physically it does not look any different we waiting to strip down a buddy of mines motor and then we will compare them as we only had rebuilt pics to look at. What i do know is the fn7 was a local motor, fn2 seems to have been from a import. I'll confirm with you as soon as we know with some pics
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« Reply #162 on: September 07, 2011, 11:50:12 AM »

Thanks for the update Mazda, what are you gents building that side. Total restore, NA/FI?

All the best that side. Let me know if you require any of my spares. Won't be keeping anything except head, crank and block.
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« Reply #163 on: September 07, 2011, 12:44:28 PM »

I will certainly do so. NA with some throttles is the plans for my buddies motor, for now mine is still NA.It's still on the engine stand hoping to drop in the near future.
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« Reply #164 on: September 08, 2011, 08:17:49 AM »

Rod casting as FN4, with one oil channel

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« Reply #165 on: September 08, 2011, 08:28:58 AM »

Thanx for feedback will take some pics and post up ova the weekend.
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« Reply #166 on: September 20, 2011, 08:11:12 AM »

Block dipped and cleaned


Next steps, custom rods and in-house piston modifications. I still have to get around to the blank off cap on the dizzy to finish off the full CAS 24-1 only conversion.
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« Reply #167 on: September 20, 2011, 08:14:40 AM »

Looking nice,about the rods,pm me an email address and you can then see the rods,I've seen fn2,fn3,fn4,fn5,fn7,fn8,fn9 as well beginning to think at this point no difference exists and maybe the castings is an indication of maybe which assembly lines they came off at the factory?
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« Reply #168 on: October 04, 2011, 11:07:14 AM »

Quick update, still busy with the design on the rods. As soon as I'm done with initial specifications I'll send off for manufacture. Expect better updates in the month of November onwards.

Time to get this project from design to on the track!
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« Reply #169 on: October 10, 2011, 07:53:04 AM »

Progress report: Finished specifications on rods Lips sealed this will arrive towards the end of November 2011.

My good friend (and engineer) sms'd me on Friday with a possible custom piston choice - after reviewing pin height and the amount of meat we have to play will on the piston tops (as well as the compression bump I'm looking at) we might have found something better than going along and manufacturing customs.

R/S should be closer to 1.8 now, perfect for the sort of RPM I've got planned.
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« Reply #170 on: January 09, 2012, 11:22:34 AM »

Happy new year to the followers of this thread. A great update, Rods sorted are all done. I still have some work to carry out on them (Top secret i'm afraid. No joke).

Should have my bearings, head bolts and valves in the shop soon. Then it's assembly time!
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« Reply #171 on: March 07, 2012, 03:51:11 PM »

Hi all,

Here's an update of where we are. Rods have been sitting aside ready for install for a while now with a few decisions hanging in the air my side on the exact direction i'd like to go on the head. After careful consideration to weight on the valvetrain we think we've come up with a good way forward.

I can't give a definitive date as to when final assembly will begin but it will be within the next 2 months. There is a lot of machine work still - might add an additional month to that if scheduling is a problem.

Don't get too excited though, that will be the motor alone - and no where close to first start-up. I've still got the suspension work, gearbox, cooling system, aero and electronics to plan, improve, purchase, install and tune.

To add another outstanding I'll be needing new wheels - that's because i'm selling the old ones if anyone is interested. Make an offer, all four with the rubber that's left on the fronts and two new Pirelli P7000's on the rears. PM if interested, please keep this thread on topic of this build / restore.

4x114.3 PCD



That's all for now. Thank you for reading.
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« Reply #172 on: March 22, 2012, 10:02:39 AM »

Alright, we've got our specifications finalised and having some custom valves manufactured. In terms of material we've elected for a high performance alloy mix with a solid stem. We were contimplating a hollow stem to reduce weight even further but after careful consideration for higher than normal inertial stresses opted against it. The heat we're going to see at 9,000 is going to be a lot on the the exhaust side - this choice should offer a good alternative to something like a full titanium setup.

I can't even hazard a guess as to how much lighter each valve will be over stock. Changing dimensions, lengths and head diameters on both IN/EX makes for too many changed variables to even try. When the valves arrive will definitely compare against stock and update this thread.

Costs for custom valves are expensive - will most likely only follow through on this deal month end / next month after which they should be at our business within 2 - 3 weeks.

We're getting there albeit a bit slowly. 90% planning 10% hardwork - always.
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Located in Johannesburg, South Africa, Toyama Racing Spirit specialises in performance tuning serving the public as the authorized dealer for AEM Electronics in SA.

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