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Stoffregen Motorsports

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Everything posted by Stoffregen Motorsports

  1. Stoffregen Motorsports

    BrothersGarage - 1971 521

    I wonder if they would look better with the headrests removed and the holes upholstered over. I like low back seats in vintage trucks. Seeing a headrest through the back window just seems weird to me.
  2. Stoffregen Motorsports

    1974 620 Weber DGV fuel evap line

    EVAP...Hmmmm. You could simply delete them or cap them off. I've never taken the time to investigate EVAP when talking about a Weber DGV. Where do they connect on the stock setup?
  3. Stoffregen Motorsports

    My 1jz 620

    Grumpy old bastard...😀
  4. Stoffregen Motorsports

    78 620 truck Eng. Swap

    I am about 50 miles northeast of Sacramento. Right near the town of Auburn.
  5. Stoffregen Motorsports

    Dual Mikuni Center Pull Setup

    It's nice to see new parts being made in the classic style. The only criticism I have on those centerpull kits is the finish. They need to be plated.
  6. Stoffregen Motorsports

    620 suspension swap

    Yeah, I'm with the rest of the guys on this one. The gears are not the weak point. The lack of a cheap limited slip is the weak point. If you want to swap in a rear axle that has similar width, 6 lug shafts and tons of aftermarket options (like cheap limited slip), swap in a Toyota 4x4 rear axle. If you want to convert to 5 lug, use a 2wd Toyota rear axle. Same diff options. All in, I bet it wouldn't cost $750 to swap in a Toyota axle and add a limited slip. Much less than the cost of a H190 LSD...if you can find one.
  7. Stoffregen Motorsports

    L20B rebuild

    Who doesn't have a welder these days...? 😜 Harbor freight sells them for less than $200. Never thought to use JB weld for that. Good idea.
  8. Stoffregen Motorsports

    620 / KA24DE swap underway! pics pics pics.

    The flares are definitely an acquired taste, but it all comes back to precedence. They do have a place in history, therefore I have learned to accept them.
  9. Stoffregen Motorsports

    Cammed 210 head

    Sometimes I can see it. Other times, not so much. It's those not so much times that cost me tubing... I hate making cuts in expensive u-bends that turn out not to work. I have been upping my game with the use of fancy math and jigs to help find the correct cut angles. That theoretically should save time and u-bends. But, yes, getting one out the back of a pickup in a clean manner can be difficult. For the "smashed" sections, I use either store bought oval sections or I use a special jig in the press to squish them myself. Doing it in a press makes it look not so horrible. As far as HP is concerned, smashing or squishing sections like that rarely matters at all.
  10. Stoffregen Motorsports

    L20B rebuild

    In theory, the mechanical advance is limited and the springs that hold back the weights are adjusted. No vacuum advance is used after this is done. While vacuum advance is good for mileage, it is not "safe" for a performance tune, as it is hard to account for the dynamics that go on inside the distributor during on-off throttle situations. Datsun L motors tend to like a quick influx of timing. Simply removing one of the springs allows this, but needs to be checked and verified. If there is not enough spring tension on the weights, the timing can float around at idle. Initial timing at idle is set at around 12 degrees advance. Next, the total mechanical advance has to limit the timing so that it never goes over roughly 32 degrees total timing advance. This is done by limiting the travel of the distributor cam. The slots in the cam are welded shut slightly and then filed smooth. Nissan Motorsports used to sell a solid breaker plate and a "SSS" distributor cam that would take care of two out of three of the mods. I don't think they are available anymore.
  11. Stoffregen Motorsports

    Cammed 210 head

    Yes, I guess I am trying to influence some...you. The point I was trying to make is that it is not expensive to do it the better way anymore. Those parts and materials I listed are not exotic. They are available anywhere these days. Shops doing that work today are more comfortable doing those mods, which means that they won't rake you over the coals either. It's not a fools errand if it can be made to work well, last a long time and satisfy the owner's desires. The issue of HP gains is not one I am going to win with you. Even the lowliest L16 can (proven) benefit from a good header and larger exhaust.
  12. Stoffregen Motorsports

    Cammed 210 head

    While I agree with you in spirit, things have changed over the years. Headers aren't the maintenance nightmare they once were. Good ones, I should clarify that. There are things you can do to a header that will make it live a long life. - Have one custom made that fits the vehicle, not just the motor. - Get one made out of stainless. - If using mild steel, have it ceramic coated by Jet Hot, or at least cerakote (trade name). - Use a steel core gasket at the head. These are not readily available in large port, so you may have to use a 240Z gasket and cut it up to fit. - Use studs in the head instead of the bolts that come stock. - Weld on a V-band clamp to the header and the exhaust pipe (3 bolt flanges suck donkey cock). You could also use a slip fit and a band clamp. - Never ever ever use a shorty pile of crap. Those are definitively worse performers than the worst stock manifold, and the construction of them is also equally poor. We can argue the horsepower gains if you like, but I am not going to try to convince you (Mike). Yes, even on a stock L16, a good header will make power. Notice I use the word "good" a lot. We can also argue the cost benefits of using one or the other, but when it comes to cost, you should not influence others with your belief system. These are classic cars now and people are free to modify them as they see fit. A good header also has a precedence in time, so using one can improve the looks, sound, feel, and work with the character of a vehicle, making the owner feel better. No harm in that.
  13. Stoffregen Motorsports

    620 / KA24DE swap underway! pics pics pics.

    Not to thread jack, but I just got one more vintage Momo. A 1965 Austin Healey Sprite I built when I was in my teens has re-entered my life, and with it came an old Momo that I had in it. I sold this car back in about 1999 or 2000 and it has been floating around in my consciousness for the last couple of years. I even paid my registration service to find it's whereabouts last year, but then never did anything with the info. I had a dream the other night that I was back into building small race cars, and that my Sprite was one of the cars in my shop. I woke up and searched Craigslist for a similar car, and there it was...my old car. 48 hours later (and a one day trip to Brea, CA to get it) it is back in my posession. It even still wears the stickers I put on it back then. So yeah, one more Momo in the collection. That makes about 10 now.
  14. Stoffregen Motorsports

    new member, first post.

    Heat shields are always a great idea. Use it if you can.
  15. Stoffregen Motorsports

    Brake Booster Question

    You could make an adapter plate out of some aluminum pretty easily. I would think a 5/8" or 3/4" thick piece would handle all the torque of the brake pedal without concern.
  16. Stoffregen Motorsports

    L20B rebuild

    I used to build Datsun engines for a living. Back then, 10:1 for a street motor was the target CR. Sure, you can run a little more, but you will have to tune around it. Maybe slightly less timing, or a slightly larger cam. Either way, when getting to the 10:1 CR range, you will want to have your distributor re-curved. Search here on Ratsun for more info on this procedure. You can do it yourself, but it would be less hassle to have a pro do it. Rebello Racing in CA or Advanced Distributors in MN can do this for you for very little cash.
  17. Stoffregen Motorsports

    U67 Cylinder Head Valves

    Around 12 at idle.
  18. Stoffregen Motorsports

    U67 Cylinder Head Valves

    I removed the vacuum advance and installed a solid breaker plate from Nissan Motorsports. Then adjusted mechanical advance to limit it. Final adjustments were made to the springs to allow it to advance quicker. I remove one spring and leave one installed.
  19. Stoffregen Motorsports

    Hot LZ23

    I found a screwdriver once with "Kurt Farry" scribed on the handle. Bay area guys will know who that is.
  20. Stoffregen Motorsports

    Hot LZ23

    I can appreciate that, but Rebello is anything but a big company. I think they define the term "cottage industry".
  21. Stoffregen Motorsports

    Info on long runner manifold.

    That is what I was going to suggest. The heat shield could also be an air cleaner backing plate. If you make one, don't forget to have holes for the float bowl vents. Here is one that I just built for a friend. It does not include an air filter. Here's one that does incorporate an air filter. And another.
  22. Stoffregen Motorsports

    Info on long runner manifold.

  23. Stoffregen Motorsports

    Hot LZ23

    I think I already mentioned that if you're using a Z22 crank and a long (6") rod, that KA pistons wouldn't work, but you've figured it out. You mention not going to rebello because of cost. How do you know what it will cost if you don't give them a call? If it costs $100 more to get a modern cam profile through them, doesn't that seem like money well spent?
  24. Stoffregen Motorsports

    Info on long runner manifold.

    I think Rebello is actually using a 6 cyl Cannon intake and cutting it down to fit the 4 cyl. I do know whatever they are using, Dave told me they are available new.
  25. Stoffregen Motorsports

    Bent oil slinger removing timing cover

    I say ding it out with a hammer and a smooth piece of soft metal. The slinger doesn't contact anything, so as long as it is basically round and flat, it should be fine.

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