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  1. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    So I just finished all 5kmi maintenance operations. Changed from break-in/flush trans fluid to Redline MT-90 (the old Valvoline fluid was rather dark with apparently wear material??? Maybe from the several new synchros? ) . Switched to 4 quarts of Pennzoil Platinum 5w30, and a new Japanese...
  2. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Thanks for posting that. Yes, I noticed they have some "race" pulleys also, same idea. I think one of them incorporates a timing wheel provision and optional addition. It's something I'll keep in mind. I still just wonder about the necessity and performance of the 30 year old stock "damper" vs...
  3. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    So, I imagine interest in this build is on hold until dynographs appear. But, just gonna add a few little updates, as I'm still making progress. Adjusted the valve clearances this week. Changed almost all shims, now intakes are all just below nominal (.0080 inch), and exhaust is .0011 inch +/-...
  4. Coolant Replacement

    MKI Cooling & Charging
    I had an Autozone brand (Duralast I think) tstat when I first had the car. Always took a long time for the car to warm up, and the temp wouldn't be stable, often depending on rpm. Changed to Toyota tstat, engine went straight to operating temp and stayed there perfectly. Lesson learned. On...
  5. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Quick update on status of the car/build. Just started 5kmi service, primarily consisting of valve clearance check/adjust. The car is running well still, especially between 5000 and 7000rpm. Idles good. Still running 6 degrees of retard from stock, and the low end sucks but is well enough to...
  6. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    JFC!!! it is like God hates me! I just cant win! I waited to be sure the cooling system was OK before reporting it was "fixed." Sure enough, go to check the level in the tank tonight after a 150mi drive, and the level is higher than ever!! like 3 inches above normal!! GDF!!! I can't win...
  7. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Did fix the leak. Also discovered a small one where the heater soft lines connect to the hard lines. Tightened that up too. Also went back to 13psi filler cap. Looks like my cooling system is working right again! :). It expels a little fluid on full warm up (1/4-3/8" tank level) and draws it...
  8. OST-042-01: The Dubai Deception

    MKI, 84-89 NA & SC
    Kinda laughing at, enjoying, and getting annoyed at the arguments here. They may be interesting, but I for one just came to check out the build. Squish is pretty much always a good thing. Start another discussion topic for all the extraneous arguments.
  9. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Going by memory, but piston to bore clearance is ~.0045 inch+/- 0.0005; basically the same as stock. That's how it turned out using piston maker specs, with plans for nitrous. The pistons are the 2000 series alloy, the one with the higher thermal expansion, and toughness. Been pretty busy the...
  10. Coolant Replacement

    MKI Cooling & Charging
    I love rmellers humor, lol. After you've drained, filled and bled the system two or three times, it starts to seem fairly simple, at least to understand. I suggest a good flush of course. There are chemical flushes you may want to consider. A final flush with water (distilled is cheap)...
  11. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    No reason other than I'm not an expert on how to connect some instruments, especially the tach. With potentially high voltages, I don't want to fry anything. I did connect to the yellow wire last night. The signal is much better, but still bounces during overrun below 2500rpm... This signal...
  12. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Good question. The rings were supplied by Carrillo. I think I have the manufacturer ID somewhere. Dont know what the recommended break in procedure is. They are a gas-nitrided top ring, and an iron 2nd ring. Oil ring set is typical, unremarkable to look at. There are no signs of oil leakage on...
  13. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    I have not done a pressure test, but easy enough - I have a compressor. I think I'm still leaning toward a cavitation related problem. Remember the "air" bubble in the radiator forms after only one heat up and cool down cycle. Unless the air leak is at or near the radiator, an air leak makes...
  14. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    One other "epiphany" I've recently had I want to mention... I keep noticing these little specs on the spark plugs, associated with higher rpm. The two main possibilities are they are molten aluminum particles, or they are fuel or oil deposits (ash from oil being the main suspect). As I've...
  15. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    I did flush the radiator a few years ago when I got the car. I've had all indications that it flows fine and cools fine (any forward motion makes a distinct difference to water temps). The one restriction I do know of is in the laminova, where I placed a coolant flow restrictor to divert more...
  16. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Thanks for all the input guys. Well, some positive news to report. After some hard driving, the overflow condition reoccurred over the past 24 hours. Letting the engine cool for several hours (8 to be exact), I aspirated the large bubble in the radiator through some block test fluid, and...
  17. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Well, I don't want to get too hopeful, but some good news tonight. I made the same 40 mile drive as yesterday. I made it a point to routinely hit the peak torque around 5-6.5krpm. I had two reasons. First, I bled my system again, but did something different - opened up the heater core...
  18. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Thanks for the hope and ideas. 60ftlb is what I recall ARP spec to be. Maybe I'm not remembering right. Or maybe the ARP spec assumes a stock build. I guess if anyone, Cometic ought to know the required clamping torque. Last time I asked them a tech question though, the response didn't...
  19. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    So, I think I have some bad news, but please, someone try to come up with another explanation. I think the reason my coolant reservoir has been overflowing is a head gasket leak of combustion pressure into the water jacket(edit: or a head crack, but it was checked). However, there are some...
  20. 4AGE 16V Build, Take 2: 200hp "Streetable" Track Toy

    MKI, 84-89 NA & SC
    Interesting. Well, looking at that plot, I guess it kills my thesis. The timing transition peaks out after the TVIS transition, and torque climbs, so yea, flatness wasn't the goal there (I forgot exactly what a stock curve looked like). Although, it is quite possible that lack of timing advance...
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