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Ben280 last won the day on July 3 2018

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About Ben280

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    Portland OR

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  1. I'm back!! I use the car strictly as a race car. I used to drive it to events every once and awhile, but I've put a different transmission in it since then. It depends what variety of 240sx you're talking about. R200 parts are damn near lego status. Yes the gears are housing specific, BUT the open diff s13 has the same axle spline count and length as the 240/280z R200. So you just need to make a new driveshaft and front diff mount. The rear cover will also transfer from a 280z R200 to a s13/s14 R200.
  2. I'm running a 240sx transmission, a 3.90 diff and a 23.5" tall tire. 4th gear (which is 1.000 in the trans) does about 54mph at 3k RPM. A more normal tire size at around 25" would get you to 57mph at 3k RPM. https://spicerparts.com/calculators/transmission-ratio-rpm-calculator Pretty good calculator for doing the math, once you know your transmission ratios. Can play around with rear end ratios and figure out what you want for top speed.
  3. It really comes down to the ECU and the tune you'll be running. I don't see why the cam and the ITB's will be at odds with each other, you might loose a little bit of low end with the 45mm bodies, but should be good to tune out. 100% you'll need a good tuner and a lot of logging to get these things running correctly. Should make for a rad engine!
  4. I weighed my 280 shell before and after I had the cage put in so I could keep an eye on what it all weighed. As a roller, no glass, no interior, but suspension/diff etc all in, the car weighed 1173# (see photo for car as weighed). Post cage that weight went up to 1293#, and as it sits now, in full fighting weight it's 2180.
  5. Hey Guys! Selling my lightly used knuckles. These were on the car for 4 auto-x weekends, and just have the light witness marks to prove it. These have a light interference with my brake rotors, hence the chamfer on the outside corner. Includes all the hardware that Dave sends with these (grade 10.9 bolts). Asking $125 shipped anywhere in the USA.
  6. When I drove @seattlejester 's car, it was a pretty apples to oranges comparison unfortunately, I'd need more data to make a real conclusion. A lot of people confuse understeer with bad weight distribution. You can have a 50/50 car that understeers like an absolute pig! With the build, try and keep the weight as close to the axles as you can, and low. That's gonna be the biggest help. As @OverkillZ mentioned, moving heavy objects off the nose will help with your weight, but at the end of the day, suspension will be the defining feature for handling characteristics. PS, look at all this tagging we can do now!
  7. Bummer on both counts! Saturday was a great day, was high overcast but fully dry. Afternoon test and tune was fun, I ended up messing with shocks a whole bunch. Sunday was real wet, but I did figure out some stuff with the rain tires. More events next year, so look out for those!
  8. Next opportunity to hang out with your Z buddies is just a week away! Slap that pre-reg link and save $5 off your entry fee! Pre reg link: https://scorekeeper.wwscc.org/register/or2018/events all sorts of good info: http://www.oregonscca.com/solo---autocross.html Let me know if you have any questions!!
  9. For your home testing, we use the "B" scale on Slow response at 50'. Measurement should be taken when vehicle is perpendicular to the meter at wide open throttle.
  10. Great pics! Don't remember your tire size, but TireRack is doing some sales and free shipping on orders over $50!
  11. HybridZ to the rescue! Excited to throw this tune on and see what she does!
  12. Awesome weekend, was stoked that SeattleJester was able to make it out! Couple mechanical issues for both of us on Sunday, but I'm excited to get back up there for September. Hoping a few other members will be able to make it up as well!
  13. Alright HybridZ, don't let me down! I've been battling with my ITB's for a little bit now and am getting properly frustrated. They are great at wide open, but have a really serious bog on tip in. This is very evident in a 1-2 shift under full power, rather than having smooth power once in 2nd gear, it jerks for a half second, then ramps in power. For auto-x this is super frustrating since there is a LOT of throttle stabs, modulation etc that accentuate the issue. A little bit about the motor, its a L28 Rebello built auto-x motor, 63DE cam, 45mm OER ITB's, 440cc high impedance injectors and LS1 coil packs. I'm running an MS3/3x. Tune and log are attached, I'd love it if somebody was able to look in this and tell me if I'm missing something obvious, or if something just looks off. I've had the car on several dynos, and the power is pretty good once it chokes through the stumble/bog. I'm going to have the injectors flow tested tomorrow, hoping that there is some sort of mechanical issue at play here. Coils were replaced recently and in testing, I've got VERY strong spark. Let me know if there's anything else that I can post up or answer! Thanks! Datsun Tune 2018-08-11.zip
  14. Sunday we just run an AM session, usually packing up and hitting the road around 1-2. I'm usually back in PDX before 6! Reminder/bump for the weekend. Saturday will be fun, we are doing a region BBQ, so bring something and come hang out! If you'd like to save some time, online pre-reg is available! https://scorekeeper.wwscc.org/register/or2018/events
  15. Loving this! Epic work sir, definitely will be following closely on your IG page. Front suspension looks amazing, I've thought about a double a arm kit, but that is next level! Really like all your progress pics for the body work, it's always great being able to learn! Are you just laying down fiberglass over the chickenwire forms?
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