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V7II vs. V7III (Dyno Comparison)

Kev M

Kev M

Cruisin' Guzzisti
Joined
Feb 11, 2009
Messages
423
Location
Medford, NJ
Todd, did you ever get a chance to throw a V7III on a dyno? If you did I missed it. But thanks to the guy's a motorcycle.com we can see one great comparison:

motorcycle.com/manu..._source=Motorcycle.com20170824

BOOM - there ya go!

That's not an insignificant power gain for the little motor. It's all across the band starting by 2800 and growing the whole way up the rev range.

While still not earth shaking it's got to be a pleasant bump from the previous smallblocks.

NICE

I have to admit that it, along with that blue has me thinking bad thoughts. But mostly I'm just happy for the brand and for new smallblock owners!
 
I have 1350 miles on my V7-3 special now. this looks about right from the seat of the pants compared to my 15 stone. bottom end and midrange is sooo much better.
furling night and day better too.
 
I agree Kev, it's tempting, but I've put so much time in getting my '13 sorted out, I really don't feel like going through another series of fixes to get a new bike right. FWIW, I have had bad thoughts about the Griso...
 
tonUPRacer said:
I agree Kev, it's tempting, but I've put so much time in getting my '13 sorted out, I really don't feel like going through another series of fixes to get a new bike right. FWIW, I have had bad thoughts about the Griso...
Click to expand...

I hope there are no issues to be sorted in the V7 III except for the pos OEM fuel filter. :lipssealed:

Was riding my new Special home to Florida from Ct where I purchased the V7 from Hamlin Cycles. I was on I 81 near Harrisburg PA when the bikes just shut down. I called Jim Hamlin from road side seeking advice on trouble shooting the problem. After we exhausted efforts at roadside he told me he was sending help. I did not ask for nor expect that kind of service. Jim's Hamlin sent one of his employees 200 miles to fetch me and the bike. He is by far the best dealer I have encountered in my 55+ years of riding......

In about an hour after returning to the shop the fuel filter was replaced and I was once again rolling toward Florida. :)

Thanks you Jim Hamlin for turning a potential disaster into only a minor inconvenience. :clap:

Paul.
 
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The improvement shown on those charts is not inconsiderable at all, and both the power and torque curves are excellent shapes. What I'd really like to see now is the stock V7iii with Todd's fueling fixes applied and then a V7iii with Todd's full exhaust system plus fueling fixes applied. It'd be nice to see something approaching 57 or 58 with a similar shaped curve with Todd's expertise applied.
 
Dinsdale Piranha said:
What I'd really like to see now is the stock V7iii with Todd's fueling fixes applied and then a V7iii with Todd's full exhaust system plus fueling fixes applied. It'd be nice to see something approaching 57 or 58 with a similar shaped curve with Todd's expertise applied.
Click to expand...

I don't think that's going to happen.

I'm thinking more like 50-52.
 
Kev M said:
I don't think that's going to happen.

I'm thinking more like 50-52.
Click to expand...
Hmmm. 2 to 4 with exhaust and fueling seems a bit paltry. I hope you're wrong, but I'm also afraid you might be right. I fantasized that the exhaust system would offer more than that.
 
Big power gains out of the small block has been tough to do; https://www.guzzitech.com/forums/threads/gt-rx®-v7r-820-quattrovalvole-info-dyno-runs.15435/page-2#post-123379
Remember that the older hemi-head big block 1064cc motors made ~59 rwhp stock. Intake/exhaust and fueling mods got them to ~70 rwhp... but again, big block.
The new V7 III hemi-head has near perfect intake/exhaust port castings (so nothing to do there)... so we'll see what this brings this coming week; https://www.guzzitech.com/forums/threads/v7-iii-820cc-big-bore-kit.17469/ -- as my Racer III-820 will be running.

10% gains are the norm; @48 rwhp, so ~5 rwhp is about all we'll see. If I see ~55+ rwhp out of my 820, I'll be quite happy as that is 4V-head territory. The intake & exhaust valves on the new hemi-heads are impressively large compared to the older Heron heads.
 
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