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New V7 with 4V Heads

Discussion in 'V7/V85/V9 Chat & Tech' started by mwrenn, Feb 2, 2015.

  1. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Thanks Mike. Folks, know that Mike is doing all of the real world R&D on this. Plan is to be sure when I finally offer it, we have a solid kit that will provide years of enjoyment. We're almost there. Pricing will not be cheap, as we're dealing with many un-obtanium/custom parts. Target is 55-60 rwhp. When my '16 Racer arrives next month, the fun will begin and documented here.
     
    scudracer, bikeseamus and A*D*A*M like this.
  2. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    After some slight tweaks, Mike ran his 4V-V7 again today on the dyno. Below shows an overlay of his bike (blue trace) versus a stock 2013 V7 (red trace). Mike's 4V is still using the stock V7 cam... Impressive for sure. Next up is the 820cc big bore on my newly arriving V7 II Racer. Should be able to achieve 60 rwhp. Stay tuned.

    StockBoreV74V-vs-StockV7-Dyno.jpg
     
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  3. mwrenn

    mwrenn Cruisin' Guzzisti GT Famiglia

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    Thought Id post up the last run, where the tech ran it to the rev limiter in every gear. The tech showed me where speed topped out at 127 mph. I was happy with the result. The graph overlay in the previous post tells the tale...sheesh....Todd's Racer will have no problem making 60 RWHP, and be bullet proof too.
    Anyway, last run was 54.99 RWHP...fun stuff... 20150826_185654_002.jpg
     
  4. JimZee

    JimZee Just got it firing!

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    Interesting...

    Thanks
     
  5. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Progress... Should have it firing later this coming week. Stay tuned for Dyno #'s.

    image.jpg
     
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  6. Lank

    Lank Just got it firing!

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    that is sweet, did you get to dyno the ported 2V heads?
     
  7. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Not yet, I will next week, my V7S with ported 2V heads is out this week on rental.
     
  8. Trout

    Trout GT Reference

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    OK so it looks like a month has gone by since Todds last post......News?
     
  9. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    We've had a few interesting hurdles since trying to retro fit my 2016... mainly new push rods and (thanks to Mike) custom made lifter cups that drop/press into the stock lifters. Mike used stock Lario lifters in his, and we're trying to make the kit as plug and play as possible. I just got the new custom length push rods yesterday, and will be working on re-assembly this weekend. More as I have it.
     
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  10. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    My 820-4V is running, just finalizing the mapping on the 820-2V & 4V this week. For those who have bought the kit already, I'll be in touch for details early next week or sooner.
     
  11. mwrenn

    mwrenn Cruisin' Guzzisti GT Famiglia

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    Awesome news Todd! Looking forward to ride reports on both bikes!
     
  12. gyrorex

    gyrorex Tuned and Synch'ed GT Famiglia

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    mwrenn,
    Great to read about the 4 valve conversion! I too have a set of Imola heads and have looked st this same setup! Who did your machine work and what valves did you use? Any info would be very helpful.
    Thanks, Rex
     
  13. Godfrey

    Godfrey High Miler GT Famiglia

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    Has any comparison been done: flow of the Lario 4V heads vs the new V7III hemi heads in stock form?
     
  14. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    As in flow data? No, and likely won’t happen any time soon unless I have two apart again at the same time, and even then all of my time to do things like this typically gets ignored when it comes time to purchase things (not directed at you Godfrey).
    I have a whole other thread dedicated to my work on this kit with dyno info.
     
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