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theczechone

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theczechone last won the day on September 30 2016

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About theczechone

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  1. theczechone

    Question regarding thermostat threads

    I actually use the stock 280z temp sensor in that location as a plug lol. The threads are bspt or bspp. I think 1/2? Don’t quote me on that
  2. theczechone

    Piston Options

    Fair enough franky240z, https://www.rhdjapan.com/kameari-cast-racing-piston-kit-l28-l30-l31.html their cast kit is even cheaper at $770+shipping, same as forged from ross racing by the way. I wonder if you can select your pin height, their advertised pin height is 29mm. With a stock L28 crank you would need the FJ20 rods to make it work.... additional 800 or so... I've been through the ringer on this. boring out to 89mm bore if you don't have a stroker crank will just get expensive. Even used parts from yahoo japan are pretty expensive. https://page.auctions.yahoo.co.jp/jp/auction/x567154406 FJ20 Rods https://page.auctions.yahoo.co.jp/jp/auction/b336457926 89mm pistons I have heard stories of great deals on engine parts but i wonder if i'll be so lucky
  3. theczechone

    Piston Options

    Don’t forget shipping from Japan
  4. theczechone

    Piston Options

    would really love to have another 3.1L but the prices these days make it difficult. for headgasket, there is always cometic, but that's not cheap either
  5. theczechone

    Piston Options

    So, i am biting the bullet and getting ready to hide my car expenses from the wife for the winter. Meaning, I want to rebuild/build my engine. I'm sure the question has been asked a bunch before but I am looking for a cast (hypereutectic) piston to stuff in an L28. I have no need to go forged, I want to keep my engine speeds below 7500 with peak power happening right around 6500 and I am naturally aspirated. So it is hard for me to justify $800+ for a set of forged pistons I will be overboring my N42 block, oversized 81zx flat top pistons are only available up to 87mm bore. Also the only ones i find are ITM? Quality is in question? Is there another option that i am missing? thanks for your input guys.
  6. theczechone

    Potter Cam markings

    if you want more info find Steve Bonk on facebook. I dont think he is on HybridZ but i think he bought the rights to the Potter grinds from Don Potter's wife after he passed. He would have more info on it.
  7. theczechone

    New Valves?

    are oem valves still available from Nissan? What happened with your SI valves?
  8. theczechone

    New Valves?

    FWIW i spoke with Dave Rebello and he seemed to think that the valves would be fine as long as used with bronze guides. Great guy, I've only bought a cam kit from him and he has been super helpful with every step along the way.
  9. theczechone

    New Valves?

    Interesting, I did source bronze guides. Perhaps i should check what the proper clearance needs to be. The factory guides were bronze and the factory valves were stainless so there is no change of material so i would assume same clearance is expected. I will take some measurements on the valves when they get here and compare to the stock ones.
  10. theczechone

    New Valves?

    @HuD 91gt i'm getting new guides installed , i will provide the valves to the machine shop so they should be able to size the guides after the installation to the new valves. Is the stem diameter on SI valves larger than stock? Any issues with valve seals?
  11. theczechone

    New Valves?

    Ended up ordering from SI Valves. New stainless valves available in 44 or 46 for intake and 35 or 38 for exhaust. I went with a stock size, and they were 10.50 a piece! for a shipped priced below 140 for the set!
  12. theczechone

    New Valves?

    So i am rebuilding an N42 head with some mild porting, it will also get a street cam which needs new springs(outers only). I'm installing new seats and guides, should i also spring for new valves? Or can i just get the used OEM ones cleaned and inspected? Do the Z valves experience a lot of keeper groove wear? If i choose the replace route, what are good manufacturers? I see ferrea offers some nice valves but the price is high ($420 on their website, $330 on ebay) Datsun Spirit Offers their set for $230 which seems fair... and then we have the ITM and DNJ valves that are questionable for $8/piece for a total of $96 from RockAuto.... Is there someone else?
  13. theczechone

    240Z ITB Install

    DSI uses Jenvey throttle bodies that can be sourced here : https://foxinjection.com/collections/dcoe-throttle-bodies-91mm-long/products/thpxxi-th-body-45-50mm-pair there are also different versions other than 50mm
  14. theczechone

    280 duration cam 0.480" lift vs 0.540" lift

    You can generate them with DesktopDyno it's a simple math based program but it can show trends. It's not perfect but you can learn a lot about the effects of changing components on your engine.
  15. theczechone

    280 duration cam 0.480" lift vs 0.540" lift

    I would need more info than just two points and at what vacuum pressure were these flowed. would also need more cam info to define the profile. need to know crank rotation for exhaust and intake valve events. This is the flow numbers i have found and i am using
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