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Intro + Build: 94 block, VVT Head, DIYPNP, VVTuner

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Intro + Build: 94 block, VVT Head, DIYPNP, VVTuner

Old 06-17-2016, 11:08 AM
  #21  
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Originally Posted by silverstorm View Post
aidandj, will do for the head gasket, thanks.

MX5RACER, I would love a copy of your tune if you don't mind sharing. And thanks for how you wired in the VVTuner. Which block do you have? Since I'm sticking with the 8.8/9.0 CR pistons in my 94 block I might be a little off on the tune from you but can adjust accordingly.
I do not have my tuning laptop with me, but my latest tune can be found here:
'90 Miata w/NOW '01 VVT engine DIYPNP Megasquirt! - Page 2 - www.MSruns.com
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Old 05-31-2017, 12:24 AM
  #22  
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Just wanted to put an update on this since it's been a long time as well as make a list for myself so I can look at all the work to do.

Current plan:
-Pull NA8 engine (probably with transmission since I'm doing clutch and transmission seals as well)
-Clean up engine bay and paint it, get rid of unnecessary things like EGR and maybe cruise control
-Swap alternator to new engine (96 block, VICS intake manifold, VVT head)
-Assemble previously mentioned engine with all new gaskets
-Install engine/trans combo
-Run new intake (2.5" cowl style)
-Figure out what all to change on my DIYPNP to control VICS and communicate with VVTuner
-Pray it starts, get it street tuned, drive or tow to Dallas for a real tune

Current questions that need more research:
-Will the 96 Crank sensor work for VVT control
-What settings and jumpers need changing in my DIYPNP for VVT control
-Do I need the NB2 trigger wheel and pulley and will I have to modify it for an NA8 block
-Should I do any work to the head
-How obsessive will I get about cleaning up the engine out of the car
-How much time and money am I about to obsess over losing?

Last edited by silverstorm; 05-31-2017 at 12:26 AM. Reason: I thought of more things
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Old 07-29-2017, 06:57 PM
  #23  
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Long time update #2:

Engine bay is painted pearlescent orange (car is same color but gloss) Ditched charcoal/egr and cruise, rerouted some wires for a semi-tuck/push stuff out of the way.
96 block is all sealed up and ready for the head
VVT head is getting worked currently (cam seals, mount VICS manifold, coolant reroute, misc...)
Trans is pulled, almost ready to be installed to engine when it's all done (have to drill out drain plug, damn short shoulder bolt stripped)

Answers to my last posts current questions:
-96 crank sensor won't work, swap out an 01+ (99+ might work...)
-Don't know about settings/jumpers yet
-Must have NB2 trigger wheel (different teeth than 96/97), trigger wheel will fit behind any 96+ accessory crank pulley. 95 down is thicker and doesn't leave room for the timing wheel.
-I will not be working the head as I'm bored driving the wife's truck all the time. Any NB head stock outperforms a worked over NA head so it will be an improvement regardless.
-I only pressure washed everything (pressure washers are the greatest invention ever), wiped down any areas I was working in (behind crank bolt) after spraying for extra shiny.
-NB2 trigger wheel and sensor cost $60, coolant reroute $155, Big box from mazdacomp with all the seals I needed/timing belt/comp motor mounts ~$300

Biggest future holdup is ECU related. Reading up on that during break times.
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Old 09-02-2017, 05:50 PM
  #24  
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Update #3:

Car is in engine, all wiring complete, engine runs well but is idling very rich (11.5ish). This is to be expected since I didn't touch anything in TS except modifying my req fuel for the RX8 425cc injectors.

Currently running 94 coil pack until I bother with COPs (still researching Toyota vs LS)
Currently running stock intake cross over (haven't pieced together everything for DIY Randall Cowl intake)
Currently running stock NA8 header (not spending 400+ for RB, hesitant to purchase a Raceland for clearance issues)
Still running batch injection (blech) since I had an issue with one injector constantly firing even with engine off ignition on (could not locate where it was grounding out to or setting issue)
No control of VVT or VICS yet, still running off of Cam Angle Sensor I reinstalled from NA8 but sensors in place for Crank and Intake Cam for when I want to get the VVTuner running. Lack of control of both of these should have me about 10-15 hp & tq low over the whole map, but especially in midrange.

Plan now is to get the car streetable as is and modify the above as time allows.
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Old 09-03-2017, 02:10 AM
  #25  
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nice color heres my 93

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Old 09-03-2017, 03:45 PM
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Wow do we have the same color car? Looks like you did a very good job on it.
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Old 09-03-2017, 04:09 PM
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Originally Posted by MX5RACER View Post
You are correct. It is to balance the temps across the cylinders, but in my experience, I have not needed to run a reroute on my track car, even here in S. FL. I will agree that for all out, 100% performance, a reroute will help make a few more HP, but it really complicates everything under the hood and adds failure points, depending on which method you use. I chose to go the simple route with my build and use the '01+ head gasket with the VVT head and skip the reroute. I have hundreds of laps at Homestead and Sebring with zero issues. My set-up is currently running 143whp on 93 octane as well.
No one "needs" to run a reroute, and no it doesn't have anything to do with "a few more hp", and it doesn't complicate anything.
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Old 11-06-2017, 05:22 PM
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Ditched the floating around NA8 coils in favor of Fab9 Densos. Still have a weird idle stumble right after start for ~30 seconds both hot and cold.
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