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Showing content with the highest reputation on 11/26/2016 in all areas

  1. From the album: my VFRs

    on the waterfront

    © Lorne Black

    2 points
  2. Vtec owners have from cheap shocks to top of the line Ohlins or Penske . from left stock Vtec, F4, F3, Fox F2/F3 shocks Stock Vtec shock is 12.4688"(317mm) long w/ a 7.5" long spring. CBR 929 shock is 11.281"(286.5mm)w/a 6.250" long spring(needs 30mm top mount spacer to use on vtec) and can be used on a Vtec with a mod to the rear brake support bracket bolted behind the shock on the back of the Frame. Member dallasb did this mod check post #74 here in this thread. CBR F4/F4i shock is 12"(305.6MM) w/a 5.5" long spring and would only need a 11mm top mount spacer and stiffer spring depending on your weight. I installed a FOX Twin Clicker off an CBR F3 on my vtec first, it would just get to the 12 3/8" at max (beyond) length adjustment(ride height). Better than stock shock but no where near as good as the other 3 brands. CBR 1100XX(Blackbird)shock is a nice & cheap drop in shock for the vtec as it runs a stiffer 16.9kg spring and is 3-5mm longer at 320mm so it would jack up the rear a little to provide extra ground clearance and quicker turn-in. Maybe $50 and a straight bolt in! Penske, Ohlins & ELKA all make new shock for the Vtec also from about $650-up. I was running this Fox F2/F3 on my vtec with a stock spring rate(15.3 kg from a 929 shock), but decided to to upgrade to an Ohlins that came off a CBR F3. Here's the Ohlins next to a stock Vtec shock. CBR F3 Ohlins vs stock Vtec shock I ended up running the stock or a 850 lb spring on the Ohlins at first, but after upgrading my front forks by having Phil at Aftershocks build my VFR forks I found I need (also advised by Phil) to increase my rear spring rate too. So I removed the stock again to install a different spring on the Ohlins, a 19.3 kg. While it's out I took a shot of the top mount with a longer bolt(through frame) and the aluminum spacer I made to make up for the approx 1" shorter CBR Ohlins. Here's the stock and modded mount w/spacer. modified top shock mount- Vtec I mounted the remote on a bracket that bolts to the back side of the left rear peg bracket. Cbr F3 Ohlins installed A stock F3 or F4 shock can be used on a Vtec but with several issues. One is that they are sprung much lighter than a VFR and the pre-load adjuster in on the bottom of the shocks making adjustment a hassle, but not impossible. With a spring change and a new top mount spacer made you could have a fully adjustable shock that should work better than our stock Vtec's. If your less than 150 lbs a F4/F4i shock might be a great/cheap improvement for your Vtec with only needing an 11mm spacer to install it. Now what is a great upgrade for the 5th Gen VFR (CBR 929)will not work as easily on our Vtecs because of clearance issues with the fixed remote. This is using a CBR 929 (only) shock on your 98-01 VFR's and it even has the same 15.3 kg spring as the VFR. The 954 has the remote adjuster on the opposite side and causes some clearance problems and has a softer spring than the 929 so not the best choice for the 5th gen install. These are both 929 shocks, the white spring ones came on the Erion versions of the 929 and yellow springs on the standard 929. Also check on Turtlecreeks F4i shock install on his Vtec after having Aftershocks rebuild/revalve and respring it!
    1 point
  3. There are a few other posts on this as well, but only the old PCII's allow you to adjust ignition timing. They intercept the signal before the it gets to the ECU, and so it can tell the computer that the timing is mentally challenged, and the computer will advance it. PCIII and PCV's intercept the signal coming from the ECU to the fuel injectors control module (or something like that). A few users have done this, none have reported huge power gains, but as far as I know, no one has dyno'ed before and after to find out. Also, you'd need to use higher octane gas. This is another mod that would only help when WOT in the upper RPM range.
    1 point
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