[MacBandit]

I just put in my Daytona cams today and took it for a short ride. I'm not currently running Dave's tune but I have a copy of his map I'm going to try. Also I'm running the Arrow exhaust at the moment but will soon be running the Competition Werkes along with the Arrow header. At the moment I'm running the very latest Triumph Street Triple Arrow tune with the very latest Daytona maps copied over to it. It runs very well but there is a very very slight fueling issue around 5k at steady throttle cruising. I like Dave also have the -1 front sprocket. I couldn't tell any differences with low rpm power or torque. If anything the throttle response is much quicker at low rpms. Overall peak powre is quite noticeably increased. Around 9k it starts pulling very very hard and does so all the way to redline which comes up very quickly with no roll off in the power. In 2nd gear before if I were to hammer the throttle around 6k it would lift the front end slightly but that was it. Now it lifts the front end and it continues upward all the way towards redline at which point you need to let off if you don't want to go over backwards. Full throttle in first is pretty much out of the question unless you want to wheelie. As I said though I didn't notice any low rpm loss. I typically ride around town in 5th gear slowing for turns and accelerating away only shifting down for a stop and it still pulls just fine under those conditions and as I said the throttle response seems slightly better under those circumstances. There is definitely a lopey cam feel to the motor when under engine compression below 2,000 rpms.

 

[Dave73]

Thats pretty much how mine feels. I can keep the wheel from lifting too much in first if I slowly roll on the throttle waiting till 10K or so to hit WOT, but then im shifting just a second or so later.

Fun stuff...

 

[MacBandit]

So I got my bike on our dyno today. First off just for information our dyno is notorious for reading low, typically from 5-10hp. Also we don't have a full tuning setup so I can't build a custom map without a lot of trial and error so I just did some quick experiments.

The first graph is my bike stock (Green) then with the Competition Werkes exhaust plus removal of the intake noise restrictor/screen (Blue) and then finally the bike as it sits today (Red) with Arrow header, Daytona cams, intake screen removed, and the crankcase breather directed into the SAI.

The second graph is my bike today in (Blue), one of our race Daytona before it had little if any work done to it in (Green), and then our other Daytona with a full system and a thinner head gasket (Red).

As it sits according to our dyno it peaks at 111.3rwhp. It is likely actually more then that. As you can see there is only two very small point where there is a loss in HP at the low rpms. For the most part it's an increase all the way from the bottom to the top. The small flat spots/dips at the bottom and midrange could likely be taken out with a proper tune. Also note that the cams and Arrow header did not increase HP by 20HP as the graph would show. When I swapped my cams I noticed the factory had installed both my intake and exhaust cams retarded by one tooth. I can't tell how much difference this would make but it could make quite a bit. I know for sure though that my bike wasn't making 90HP before both due to the history of the dyno and from experiences at multiple track days where I was able to keep up or pass many modern 600s at the end of long straight aways.

All in all I'm am ecstatic. This is a much greater improvement then I had dared to dream and my bottom to mid range power still out pulls even our fastest race Daytona and is only beaten at the very top due to the higher rev limiter. I can say for a fact though I was expecting good things from the way it pulled when I've been riding it but I didn't think it was that huge of a difference.

 

[ManBearPig]

That is certainly impressive. Not only the gains in what I assume is above 10k RPM (the graph just shows mph) but also that you didn't lose anything under that mark, either. Very nice.

Its seeing this that makes me wonder why Triumph insisits on running different cams in these bikes to begin with?

 

[Scottie]

Mac,

Those are some very nice results!

Though, your bike didn't have 90HP to start with, you still gained ~20HP!? That's pretty awesome.

Also makes me kinda sad/nervous to know that the factory messed up the intake/exhaust advance/retard on your bike.

Scott

 

[Scottie]

Also, how would you rate this mod (1-10)?

performance/cost?
difficulty?

I am more interested in the difficulty party... as the performance/cost seems to be pretty high (lots of gain for reasonable money).

Thanks
Scott

 

[Talus]

So I got my bike on our dyno today. First off just for information our dyno is notorious for reading low, typically from 5-10hp. Also we don't have a full tuning setup so I can't build a custom map without a lot of trial and error so I just did some quick experiments.

The first graph is my bike stock (Green) then with the Competition Werkes exhaust plus removal of the intake noise restrictor/screen (Blue) and then finally the bike as it sits today (Red) with Arrow header, Daytona cams, intake screen removed, and the crankcase breather directed into the SAI.

The second graph is my bike today in (Blue), one of our race Daytona before it had little if any work done to it in (Green), and then our other Daytona with a full system and a thinner head gasket (Red).

As it sits according to our dyno it peaks at 111.3rwhp. It is likely actually more then that. As you can see there is only two very small point where there is a loss in HP at the low rpms. For the most part it's an increase all the way from the bottom to the top. The small flat spots/dips at the bottom and midrange could likely be taken out with a proper tune. Also note that the cams and Arrow header did not increase HP by 20HP as the graph would show. When I swapped my cams I noticed the factory had installed both my intake and exhaust cams retarded by one tooth. I can't tell how much difference this would make but it could make quite a bit. I know for sure though that my bike wasn't making 90HP before both due to the history of the dyno and from experiences at multiple track days where I was able to keep up or pass many modern 600s at the end of long straight aways.

All in all I'm am ecstatic. This is a much greater improvement then I had dared to dream and my bottom to mid range power still out pulls even our fastest race Daytona and is only beaten at the very top due to the higher rev limiter. I can say for a fact though I was expecting good things from the way it pulled when I've been riding it but I didn't think it was that huge of a difference.

Great update Mac. Thanks for sharing! I can see why you'd be so happy. That's awesome. I'm looking forward to swapping in cams as well. Will do a before & after dyno also.

Where did you source just the Arrow header?

 

[MacBandit]

Mac,

Those are some very nice results!

Though, your bike didn't have 90HP to start with, you still gained ~20HP!? That's pretty awesome.

Also makes me kinda sad/nervous to know that the factory messed up the intake/exhaust advance/retard on your bike.

Scott

Well as I stated based on track time I had I'm sure the bike was making 90+ before. This dyno is notoriously 5-10Hp low.

This isn't the first time someone on the forums have gone in to do a valve check or other things and noticed their cams were a tooth off.

As for ease it's as easy as adjusting your valves which for some is extremely difficult. I'd say for a novice I'd say don't do it. Installing the cams on a triple correctly is very tricky. For an experienced tech I'd say it's a 6 out of 10. For the expense I can't comment because it's going to depend on how much you pay for them. I did this for less then $100 because I only needed one cam as I had the other one already at work.

Regarding the loss or lack of it at low rpms I can't attest to whether this is the norm or not. As I stated I now have the Arrow headers on my bike which are significantly larger then stock and I also attached my crankcase breather to the SAI.

As for the RPMs the RPM module on our dyno is screwed so it doesn't show this. The RPMs however are easy to read it's just add 10 to each number and multiply by 100. This will get you a close idea of where it is. So 40 is 5,000 60 is 7,000, etc.,etc.. Redline is actually 13,000 so this is only an approximation of the rpms but close enough.

 

[Dave73]

That is certainly impressive. Not only the gains in what I assume is above 10k RPM (the graph just shows mph) but also that you didn't lose anything under that mark, either. Very nice.

Its seeing this that makes me wonder why Triumph insisits on running different cams in these bikes to begin with?

Marketing. They don't want their "Roadster" to have the same power output as their beloved Daytona.

I still believe perception plays a lot into this as well. People think their Striples have more bottom end than a Daytona because they don't have the surge or power increase at the top end. This makes the bike feel like it has a broader powerband and that it pulls harder down low, when in reality they are just lacking on the top end. These engines, especially the heads/ ports/ throttle bodies were designed around the Daytona cam specs.

I spent about $250 to do mine, including the dyno time. I did it along with the 12k valve adjustment so I really didnt have to do a lot of work on top of that. Labor wise, its basically the same as shimming the valves.

Im still happy with mine, no regrets.

 

[racecomp]

I have two sets of Daytona cams and a set of throttle bodies make me an offer

 

[Doug97]

Sorry for resurrecting a rather old thread, but can anyone tell me if the 06-08 Daytona cams will drop straight into my 10 Street Triple or are there additional components required, e.g. Daytona cam chain or sprockets etc etc?

 

[Dave73]

Sorry for resurrecting a rather old thread, but can anyone tell me if the 06-08 Daytona cams will drop straight into my 10 Street Triple or are there additional components required, e.g. Daytona cam chain or sprockets etc etc?

They don't "drop in" because the valve clearances will need to be adjusted. As far as parts go, you will need the cams, gasket (s), and the proper shims for the valves.

 

[Doug97]

They don't "drop in" because the valve clearances will need to be adjusted. As far as parts go, you will need the cams, gasket (s), and the proper shims for the valves.

So I need Daytona gaskets (are you talking about head gaskets?) and Daytona shims?

 

[MacBandit]

No. You probably don't need a valve cover gasket and the shims are the same for Street Triple and Daytona but the valve clearance spec is different for the Street and Daytona so you will need to readjust your valves.

 

[Doug97]

Thanks MacBandit, will that require removal of the cylinder head?

There are a few differences in part numbers, depending on engine number, e.g. the Daytona camchain is a different part number to the Street Triple (although I don't know why, it's the same number of links). See here:

06-08 Daytona:
http://www.worldoftriumph.com/trium...h_motorcycle_parts_locator.php?block_01=&block_02=100058555-0-2&block_03=610400

Street Triple:
http://www.worldoftriumph.com/trium...h_motorcycle_parts_locator.php?block_01=&block_02=100058244-0-2&block_03=610100

I assume this isn't a problem?

 

[Triumph Race Support]

I get a few customers a year wanting to do this and I always talk them out if it.
First problem is the Street Triple has cast pistons where as the Daytona has the better forged pistons. This means theres more chance of a tuned higher revving ST engien going bang. The Daytona is all about the high revs thats why it has the better pistons.
Next the tuned length of the headers is matched to the cam timing. So if youre going to swap the cams you have to swap the headers or you'll never get the best out of the cams.
And finally a short mid section of pipe is robbing the engine even more of its mid range. We always make pipes for the ST with a long length between silencer and collector for this very reason. We do get slated for this but I work on performance not looks!
If you really want your STs to go faster make the most of stock valve timing, head squish and intake/exhaust mods, or fit a Daytona lump.

 

[Ruby Racing]

Sorry for resurrecting a rather old thread,

At least it shows you bothered to use the search function. Well done that man.

 

[MacBandit]

Yes, I'm aware of the cast pistons. The stock Street Triple rev limiter is set to 12,500 despite the manual saying it's at 13,000. This is the only change I made on my bike. I know it's just one persons opinion but I can't see 13k causing issues especially since it's what the motor was designed for. The stock headers are designed for more mid-range torque and it's because of this not despite of it that the Street with Daytona cams makes more power at all rpms then a stock Street Triple. The dyno numbers prove this. The Arrow 3n1 system will improve on this even more. On the dyno from idle to about 4k I saw a 1hp increase from 4-6k about 2-3 hp. From 6k up the Street Triple with the Daytona cams leaves the stock Street Triple in the dust and it climbs all the way to about 12k where it starts to level off at around 110hp. Yes you could put Daytona headers on it and raise the rev limit and get more peak HP but then as you said yourself you would be sacrificing low midrange power and run the risk of piston failure from high velocities. That's not the point of this modification.

 

[Dave73]

I did this mod knowing there was a "risk" due to the cast pistons, but the way i see it is quite simple...everything has risks associated with it. Some more than others. I believed the minimal risk was worth the reward, and 6k miles later (with a couple trackdays thrown in) it still runs strong.

 

[Doug97]

Thanks MacBandit, will that require removal of the cylinder head?

There are a few differences in part numbers, depending on engine number, e.g. the Daytona camchain is a different part number to the Street Triple (although I don't know why, it's the same number of links). See here:

06-08 Daytona:
http://www.worldoftriumph.com/trium...h_motorcycle_parts_locator.php?block_01=&block_02=100058555-0-2&block_03=610400

Street Triple:
http://www.worldoftriumph.com/trium...h_motorcycle_parts_locator.php?block_01=&block_02=100058244-0-2&block_03=610100

I assume this isn't a problem?

One more question ... are these cams in good condition?