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mazdeuce - Seth
mazdeuce - Seth Mod Squad
9/2/18 3:36 p.m.

In for the head pictures. That's pretty. 

hhaase
hhaase HalfDork
9/2/18 11:11 p.m.

Man, I'm getting giddy.   I've also picked up the block and crank from the local shop too.   I'll be giving them a good look-over next day or two.   The current motor and clutch are both starting to give me some signs that they're coming due.   I'm just hoping I can keep them both going for the remainder of this autocross season.   Being ready for one-lap in time is going to be a crunch after all it seems.   In current condition I don't consider the car up to the task for doing any track duty.

In the meantime, I've been getting a bit distracted for my offseason practice.  My little business had a great Labor Day sale too,  so I've got two more monitors on the way.   

oldeskewltoy
oldeskewltoy UltraDork
9/5/18 10:55 a.m.

A bit further.......

 

 

 

What are the short block specs?  Pistons?  Deck? 

 

I'm thinking of taking a big slice (.040") from the head... get the chambers down to about 34-33 cc (currently @ about 37)  this will raise compression "substantially", but it will require adjustment of the cams to get accurate cam timing.......

hhaase
hhaase HalfDork
9/5/18 12:35 p.m.

Pistons will be standard bore, but I figured I'd wait until I knew the head dimensions before choosing exactly.  And without knowing exact pistons, I can't give a measured deck height yet either.

I'd say go with the big slice. 

 I'll just make sure to measure the actual deck height of the piston at the time of bottom end assembly and use an appropriate thickness head gasket.  This way I can also match the piston compression and such to the head too.

oldeskewltoy
oldeskewltoy UltraDork
9/12/18 1:11 p.m.

those exhaust seats are just horrible.... good thing it's getting a new 3 angle  wink

 

hhaase
hhaase HalfDork
9/16/18 9:58 a.m.

The bad news for this update, is that I had to cancel my trip to the Waumandee hill climb.   All the other engineers at work, plus my boss, will be out over that weekend.   So I can't take the time off.   That sucks, but what can you do.   And only one more autocross left this season too, which also makes me sad. Otherwise, this months event was a much more horsepower driven course, and I suffered for it.  Too much time spent with my foot planted on the floor and wishing for more power.  I still had a decent showing for placement, but not as good as I would have liked.  The solution to that is in progress of course.  Parts are slowly coming in,  and for right now funding is on track to get the engine done over this winter.  

There are a few new areas I'm also going to start working on, since this car is too far down the path and will never be 'original' again anyway.   One is that it's time to start grinding off un-used brackets wherever I can find them.   Things like the spare tire mount in the frunk,  original battery tray, stuff like that.   I'm still undecided if I want to re-harness the EFI system for Megasquirt or keep the factory harness and adapt it.   I keep procrastinating on that change because the stock ECU is working fine and I don't want to screw things up right now.

Exhaust at some point I really want to take care of too.  I'm just tired of the monster muffler under the back-end.   Everything from the engine-back is an aerodynamic mess on the underside.   I'd really like to start looking at underside aero over the winter too if possible.  That and something to eliminate all the drag from the huge-ass mirrors.  I've got some ideas on that, but I really want to get the car up in the air so I can look at things and come up with a comprehensive plan.  If I just add things here and there, god only knows what the result will be.  

 

oldeskewltoy
oldeskewltoy UltraDork
9/18/18 7:19 p.m.
oldeskewltoy said:

those exhaust seats are just horrible.... 

 

 

Not any more... and you can now see the "chunk" taken from the head

 

oldeskewltoy
oldeskewltoy UltraDork
9/19/18 5:54 p.m.

 

 

 

stock 4AG chamber comes in @ 36cc, this chamber now sits at a "svelte" 32,5cc (to use for CR calculations)

 

 

hhaase
hhaase HalfDork
9/21/18 12:08 p.m.

Going to be exciting assembling this lump pretty soon here.  Time to start sorting out piston selection now that I have the chamber volume,  always fun looking at charts to see the actual dome volumes.

Didn't forget my oil drainback in there, did you?

-Hans

oldeskewltoy
oldeskewltoy UltraDork
9/21/18 7:04 p.m.

In reply to hhaase :

sent you email............

oldeskewltoy
oldeskewltoy UltraDork
9/25/18 11:03 a.m.
hhaase said:

Going to be exciting assembling this lump pretty soon here.  Time to start sorting out piston selection now that I have the chamber volume,  always fun looking at charts to see the actual dome volumes.

Didn't forget my oil drainback in there, did you?

-Hans

I hadn't seen the request... but adding it was nothing that caused a delay... the delay is waiting on the ordered shims to set valve clearances......

 

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