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Prepping the NB


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#181
RavynX

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I passed the head on to Karl from Applied Racing Technology this evening in Austin. Cool guy and can't wait to see what he finds out about it.

#182
Spiderxvpbiking

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I can tell you what he's going to say $$$$ ;D J/k I know Karl well and have done a lot of business with him. Thanks for sharing

#183
itrack

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Did you get the cam.

Shopping cart
--------------------------------------------------------------------------------

Your cart contains:

Quantity Item Price Total


CAMSHAFT, INTAKE
Part No : BP5A-12-420
$276.05
$166.95 $166.95 Remove

#184
RavynX

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Karl gave me an update today:

Chris,

Update. I'm pretty sure we talked about surfacing the head but I forgot to add that to the estimate. The head looks like it has a bit of a dip in the middle based on the square, but not that much. It really should be surfaced. I'll snap a few pictures as I go to show you how it is off. That adds $50.

I cut the seats. None were really bad, but it was bad enough that you will notice the improvement. Still working on the porting.


He also told me that we'll need to replace the valve stem seals and to order that along in the head gasket kit from Mazda Motorsports. I'm wondering if that dip in the middle was causing the lower compression in those two cylinders. Fun stuff. :lol:

#185
Hollywood

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Fun stuff. :lol:



:blink:
I was thinking of the immortal words of Socrates, who said, "... I drank what?"

#186
RavynX

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:blink:

Do you picture me lashing at my own back with a cat o nine tails saying "Man this is invigorating!" ? hahaha I'm actually learning a lot. I found out from Karl that there ARE two different kinds of water pumps. OEM has a stamped sheet metal impeller and there's a cast metal impeller water pump, aftermarket I believe, that actually flows water better. I have more research to do.

#187
Eraser-X

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Why aren't you having him install the valve seals? Why would you dissemble the head after paying to have someone build it out?

Eraser-X

Karl gave me an update today:



He also told me that we'll need to replace the valve stem seals and to order that along in the head gasket kit from Mazda Motorsports. I'm wondering if that dip in the middle was causing the lower compression in those two cylinders. Fun stuff. :lol:


Eraser-X
Austin, TX
Birkin S3

#188
RavynX

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Why aren't you having him install the valve seals? Why would you dissemble the head after paying to have someone build it out?

Eraser-X

Easy there. I never said that I would be disassembling it and installing the valve seals myself. He is doing all of the work.

#189
RavynX

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The Raceland header arrived yesterday. UPS managed to destroy yet another box.

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#190
RavynX

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Volks on the s2k are sold, woot! Can't wait to order parts to get things rolling with the Miata.

#191
RavynX

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So Karl said it would most likely be ready today. He said he had to mill it 0.010mm to get it level again. He also said the head was warped (hence the milling) but said the camshafts were a little tight so he had to do some work to free them up.

Milled 0.009...
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Milled 0.010...
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#192
Hollywood

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Boosh!

Gettin excited?
I was thinking of the immortal words of Socrates, who said, "... I drank what?"

#193
RavynX

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Boosh!

Gettin excited?

I am! Then again I'm getting overly cautious wondering how it's going to run without the supercharger and with a slightly higher compression. Not to mention how timing will be affected with the new intake camshaft. I still need to figure out how to tune with the Hydra. :blink: I have kind of a sinking feeling that I'll put everything back together and then either it will still overheat (that fucker BETTER NOT!) or something else will go wrong.

#194
spoolin2bars

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I am! Then again I'm getting overly cautious wondering how it's going to run without the supercharger and with a slightly higher compression. Not to mention how timing will be affected with the new intake camshaft. I still need to figure out how to tune with the Hydra. :blink: I have kind of a sinking feeling that I'll put everything back together and then either it will still overheat (that fucker BETTER NOT!) or something else will go wrong.


why not shave .020? or more? you know if any material is taken out (i.e. porting) you lose some compression. we usually go 20-40 thousandths depending on the head (if it was shaved before) make, (honda,mazda,dsm) and how much it was ported.

nice to know you found the problem. my friend had a tiny crack in the head gasket once and it would idle all day long wihtout getting hot. but over 30min. continuous driving and the temp. would rise. took subaru forever to figure it out.

#195
itrack

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He still never answered wht the hell tight cams are?

#196
hustler

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He still never answered wht the hell tight cams are?


I assume he was referring to valve lash. Mine are at .003-.006 intake/.005-.008 exhaust per John Day's instructions and my head is silent. He should probably go tighter on the exhaust side since it's NA now, but I'm regurgitatig what my builder told me who is not only immortal, but has a shop unicorn.

#197
RavynX

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I assume he was referring to valve lash. Mine are at .003-.006 intake/.005-.008 exhaust per John Day's instructions and my head is silent. He should probably go tighter on the exhaust side since it's NA now, but I'm regurgitatig what my builder told me who is not only immortal, but has a shop unicorn.

hustler is correct here. He said the cams turned fine but since the head was warped he was thinking the cams would bind when we torque down the head to the block so free'd them up a little.

#198
RavynX

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I got the head back last night. I need to go get a straight edge and check the block (should have done that the night I removed the head but oh well we're already past that). I'm just waiting on ARP head studs from Emilio and exhaust manifold studs from MiataRoadster and I'll be good to go... I think. Actually I need a throttle body, haha; need to ask my friend if he's still selling his.

#199
RavynX

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Good News: The block is straight from what I can tell with a straight edge. I also got a friend to lend me a throttle body till I can find one for myself.
Bad News: Karl didn't remember my address so parts will ship out tomorrow. Bah, I want this thing back together already!

#200
RavynX

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I got the rest of the parts in from Karl and I'm realizing I will need to buy or make AC condenser brackets after I had to bend the tab mounts back to their original positions. It's going to be a slow installation. Last night I went over and cleaned the deck of the block and checked it again with the straight edge and I'm feeling good that it's not warped. I wasn't able to see any light under the straight edge. I also noticed that the two small (oil?) ports in the back of the block in the center almost looked clogged; I had to pull the gunk away.

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