I have a R1 2009 as a track bike. For years we (R1 09-12 riders) have been waiting for some documentation from Graves to give us some facts for their velocity stacks. They have literarily been giving us smoke screens and avoided to give proper answers. Their behavior has been arrogant by my opinion.
Those who have bought the stacks, installed them have just said it made a difference – but never given us some dyno charts. Tired of waiting for proper answer, from otherwise a good supplier, I got hold of some used stacks. I installed them and today I dyno'ed before and after.
Below you can see the result.
Some info: It’s the same engine, same dyno, same temp etc. The only difference is velocity stacks.
The spec for the engine is given to me by Pete Beale from UK, and I have promised not to disclose it. So please don’t ask. I got tired of tuners destroying my engine, therefore I build the engine myself – every single piece.
Edit: Hired the dyno and fuel tuned it myself
If it feels good use that map, I have tried 12.8 - 13.2 map building on my '06 w/Bazzaz ZAFM setup building maps. I can't tell the difference anyway its so close, they are safe a/f ratios for safety's sake anyway.
I already have the lowers (not in yet),now I'm ordering the uppers as well. Was eventually going to add them,but now they will be a very near future purchase. Great to hear the results of these finally. They are very expensive because not many are ever made at one time, and the R&D behind them too I would imagine.
did you use the maps I sent you as well .
the YEC bellmouth kit would have maybe been even better . but it seems quite good . NOW GO AND ENJOY IT . you were lucky . i dont normally give out specs . must have caught me in a good mood LOL ( unusual )
Pity these bikes are not still in wsb . But we are building a CRT GP bike with one of these engines . will try and get someone to upload my pics .
OP 10,500 switchover point for the uppers? I have the graves uppers and lowers going in this week and was told 10,200 RPM on the stock motor. Can you tell us where you got that 10.5k switchover point from? I have to send my ECu off this week for flashing so I really need to know!
OP 10,500 switchover point for the uppers? I have the graves uppers and lowers going in this week and was told 10,200 RPM on the stock motor. Can you tell us where you got that 10.5k switchover point from? I have to send my ECu off this week for flashing so I really need to know!
I was told 10,500 as well,directly from Chuck Graves himself. Check the Graves site and ck. the forum,I asked the same question a few months ago and Charles Graves was the first to reply with the answer. Flashtune or Eculeashed based drjak ? If you live near anyone with the F/T interface I'm sure they'd be happy to do yours for a few :beer:beer even mail it to them.
Good to see you quantified what we all felt with the graves stacks. 10,500 swithover ahhh. I had mine flashed to 10,200. Time to relfash. How much of a difference did you see from the to swithing points from 10,200 and 10,500?
Good to see you quantified what we all felt with the graves stacks. 10,500 swithover ahhh. I had mine flashed to 10,200. Time to relfash. How much of a difference did you see from the to swithing points from 10,200 and 10,500?
I cannot recall the exact numbers on each RPM setting, to many runs and result to keep all data. All of them was very much the same until opening point.
I cannot explain way, but top end power went down 0.7-1.5 HP on other settings than 10.500 RPM.
Intake cam is from Kent Cams in UK (www.kentcams.com), exhaust cam is made by Pete Beale. I don't know what he has done with it. Probably some jumbo mumbo black magic because it is really good!!
beautiful curves!! I bet Pete has more than a "few" hours in the head! plus gotta be running the YEC springs as you can't put any cam in them with stock springs... but some GOOD specs out there... especially if you can get the intake >250 duration and >10.4mm lift power is all in the top end of these things from what i have seen/done.. head's a mess stock.
man i always miss the best threads on here jajja ran post here the NEW DYNO charts of you know what:secret: jejej that secrect weapon that keeps you in the garage until 2am :dundun:
After talking to Spiderman on the phone today, cams and vstacks from them are going in next month for me. There are reasons they don't publish numbers, and I don't blame them.
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