Jump to content

Photo

NorCal '91 NA Spec Miata Build

- - - - - build na scca construction 1991 1.6L

  • Please log in to reply
123 replies to this topic

#81
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Old fuel injectors out, new, reflowed injectors back in:

Posted Image

#82
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
A few more things bolt on:

Posted Image

Posted Image

Posted Image

#83
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Freedom from the engine stand!

Posted Image

#84
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Sunday, Alberto and I got the engine the rest of the way back together and ready for the transmission.

Man that ACT plate is bright:
Posted Image

Transmission on:
Posted Image

And ready to go home:
Posted Image

#85
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
And after a bit of finagling, the engine was in, transmission bolted to the PPF and the wiring harness reconnected:

Posted Image

#86
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
A few more things bolted in.

Headers:

Posted Image

So much vacuum:
Posted Image

#87
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Ok, so here's a question. How do these SPX2 intakes mount? Do I need to fab something to hold this guy to the old mounting posts the original air filter housing would have been attached to?

Posted Image

#88
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Also, for that aluminum heater hose pipe with the o-ring on in; does that need silicone sealant when it goes in?

#89
Alberto

Alberto

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 1,354 posts
  • Location:Mountain View, CA
  • Region:SFR
  • Car Year:1990

Ok, so here's a question. How do these SPX2 intakes mount? Do I need to fab something to hold this guy to the old mounting posts the original air filter housing would have been attached to?



Did you buy it new? If so, it should have come with two long L shaped brackets to hold the AFM.
Dr. Dan gave me one of those intakes (Thanks Dan!) last year and I had to buy the brackets separately from the guy that fabs the intake in TX. $20.


I was half expecting that you would be posting an update where you had started the car last night. So close!
Bona fide - A bonafide Spec Miata driver

#90
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47

Did you buy it new? If so, it should have come with two long L shaped brackets to hold the AFM.


Ah, I bet they're floating around in the box still. So close to getting it started ;) Definitely after work some time this week I'll get things sufficiently buttoned up to give it a test.

#91
Charlie Hayes

Charlie Hayes

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 513 posts
  • Location:Walnut Creek, Ca
  • Region:West Coast
  • Car Year:1999
  • Car Number:22
Turn the intake filter tube the other way. You do not want it over the exhaust like that. It should fit snug near the brake/clutch master(s).
  • john mueller likes this
Bona fide - A bonafide Spec Miata driver We have a Winnah! - Won their 1st race... Congratulations! Survive the 25, NASA Thunderhill - Survive the 25, NASA Thunderhill

#92
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47

Turn the intake filter tube the other way. You do not want it over the exhaust like that. It should fit snug near the brake/clutch master(s).


Thanks Charlie, I was wondering which way that wanted to go. It didn't seem like it would clear the hydraulic cylinders and being over the exhaust seemed like a bad idea too ;)

#93
Charlie Hayes

Charlie Hayes

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 513 posts
  • Location:Walnut Creek, Ca
  • Region:West Coast
  • Car Year:1999
  • Car Number:22
It is a tight fit but its the way it should be.
Bona fide - A bonafide Spec Miata driver We have a Winnah! - Won their 1st race... Congratulations! Survive the 25, NASA Thunderhill - Survive the 25, NASA Thunderhill

#94
Alberto

Alberto

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 1,354 posts
  • Location:Mountain View, CA
  • Region:SFR
  • Car Year:1990

Ah, I bet they're floating around in the box still. So close to getting it started ;) Definitely after work some time this week I'll get things sufficiently buttoned up to give it a test.


I emailed you a pic of the brackets. Once you find them and get the AFM located, the air filter will fit in the rear corner of the engine bay. You will need to loosen the forward most brake line and push it backward to make room. I'll do it for you next time I'm there if you don't get around to it.
Bona fide - A bonafide Spec Miata driver

#95
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
It lives! [click the images for videos]

Posted Image

Little puff of smoke was either something burning off the manifold or just assembly lube burning out the exhaust and coming back up from the open downpipe; it went away after a few minutes. After chewing through the assembly lube it smoothed out in to a really nice idle. Oil pressure looks great and it sounds right!

Posted Image

#96
William Bonsell

William Bonsell

    Member

  • Members
  • PipPipPip
  • 398 posts
  • Location:Poulsbo, WA
  • Region:Northwest
  • Car Year:1999
Noticed your serpentine belt. Always had a problem with those and switched over to the factory OEM V-belt from Mazdaspeed or dealer. Not sure if anyone else has had the same issues, but my serpentine would eventually loosen up and begin to slip. Something you might want to look into to.


Bill-
Make it Rain - Made Paypal donation of $100+ Bona fide - A bonafide Spec Miata driver

#97
fotostars

fotostars

    Member

  • Members
  • PipPipPip
  • 312 posts
  • Location:Norcal
  • Car Year:1997
  • Car Number:63
Hey, make sure you remove the Airbag bulb behind the dash before putting everything back together... It will drive you nuts ;-)
Great build! Congrats! Can't wait to see the car at the track!
  • Alberto likes this
Survive the 25, NASA Thunderhill - Survive the 25, NASA Thunderhill Bona fide - A bonafide Spec Miata driver

#98
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Tonight I installed the 5x racing adjustable fuel pressure regulator and an inline fuel pressure gauge. This was prompted by noticing this giant fuel leak:

Posted Image

It's a little hard to see in the photo, but the number 4 injector was dumping fuel down from the fuel rail and making a nice little puddle there. No wonder I smelled gas every time I started the damn thing. I pulled the fuel rail off and reseated the injector (the o-ring looked like it had gotten a little twisted) and put in the adjustable FPR while I was at it and put it all back together. Connecting the F/P and GND terminals in the diagnostic port was quite handy for making sure it wasn't leaking without having to run around to start the engine all the time (plus, less chance of catching myself on fire).

I also then managed to install the pressure gauge on the return line first ("why does this read zero? doh...") before then also using the diagnostic port trick to set the initial fuel pressure. According to the FSM, you want between 38 and 46 psi with F/P and GND jumped, so I set it to 44. Pull out the jumper, starts right up (with fuel pressure hovering around 32 psi during idle).

Posted Image

#99
Austin Robison

Austin Robison

    Member

  • Members
  • PipPipPip
  • 103 posts
  • Location:Palo Alto, CA
  • Region:SFR
  • Car Year:1991
  • Car Number:47
Also, this is the famous HLA noise, right? With the stethoscope, it definitely sounds like it's coming from the cams.



#100
NV Racer

NV Racer

    Member

  • Members
  • PipPipPip
  • 56 posts
  • Location:Reno, NV
  • Region:San Francisco
  • Car Year:1990
  • Car Number:70
Definitely sounds like HLA noise. Do not worry about it yet. Some HLA's take time to fully pump up. Mine were noisy until I got on the track for some extended High RPM running.

Dennis





Also tagged with one or more of these keywords: build, na, scca, construction, 1991, 1.6L

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users