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2012 V7 with 4V Heads

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.webp
 
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.webp
 
that is sweet, did you get to dyno the ported 2V heads?
 
Trout said:
OK so it looks like a month has gone by since Todds last post......News?
Click to expand...
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.
 
GT-Rx® said:
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.
Click to expand...
Awesome news Todd! Looking forward to ride reports on both bikes!
 
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
 
Godfrey said:
Has any comparison been done: flow of the Lario 4V heads vs the new V7III hemi heads in stock form?
Click to expand...
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.
 
mwrenn said:
I have been working on this project for more than a year now. Mainly gathering parts together. I wanted to see if it was feasible to take some Imola heads, machine them out to match Lario heads, and install and run them on my V7 Classic. Tonight I finished lapping in the valves on one head, and installing the valve springs.
I hope to have the project running by next week. It will involve changing the cam and lifters, replacing the pushrods, installing different cylinder studs, locating the cylinder head temp sensor on the replacement head, replacing the pistons, and installing the replacements heads with the different rocker shafts.
In order to give the engine a chance at longevity, I had the cam and lifters DLC coated, I'm using forged cylinder studs from a Volkswagen racing engine. I sourced the valves from Kibblewhite, and will use stock Guzzi progressive valve springs. I found two stock V75 pistons on eBay, I had them lightened and ceramic coated to match the weight of the stock pistons. I also had two custom weight wrist pins manufactured.
For fueling and ignition, I am using the the V7 Classic ECU with a reflash by Todd, I have also added a power Commander V with auto tune so that I can play with the fuel mixtures.
Anyway, here are a few pics I took tonight. I am planning on a Dyno run once it's together and running good.
Click to expand...
Are these the 350 Imola Heads ? how rare are they in the states? I am interested in doing the same to my V7ii however such things don't exist in Australia :)
I really admire your work!
 
I know from a group I was in that a lot of the Subaru automobile bits were interchangeable like Lego, heads from these years worked on those cars etc…

How much work is required to use / fit the 4 valve heads on a ”current“ engine, simply from a barrel to head dome perspective, alignment ? ? ?
Or do they just bolt on and go - Not…
 
This is over a half decade later , but did anyone else notice that his original head assembly
had the valve springs upside down ? Peter
 
Moto-Uno said:
This is over a half decade later , but did anyone else notice that his original head assembly
had the valve springs upside down ? Peter
Click to expand...
I do now. That was Mike's build.
Interestingly enough, I thought 60 rwhp was attainable, and shockingly I saw 70 rwhp on my most recent tune with the 820cc motor with close to ~25k+ miles on it.
 
GTM® said:
I do now. That was Mike's build.
Interestingly enough, I thought 60 rwhp was attainable, and shockingly I saw 70 rwhp on my most recent tune with the 820cc motor with close to ~25k+ miles on it.
Click to expand...
With that much power being put down to the pavement one has to ride !!
 
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