CPI pipe -where are the conclusive results?

dubious01 · Post by **dubious01** » March 15th, 2010, 5:32 pm

well after reading 18 or so pages of back bitching and hearsay, I still found no conclusive answer.

How was it and where is the dyno sheet?
I don't speak peak, cause most people run their engines through more than a single 500 RPM range.

how fat was the curve?

lets stay on topic ....please?

dubious01 · Post by **dubious01** » March 16th, 2010, 9:09 am

wow, that came off wrong.
I must have been real irritated with the 18 pages of arguing.

I have to say for the most part, you guys are hilarious and good bunch.

still no concensus on the CPI pipe?

thestuz · Post by **thestuz** » March 18th, 2010, 2:18 am

yeah we were gonna do a dyno sesion but it was organised at the end of last year. think we all partied too hard over christmas and it got forgotten in the haze of hangovers. but yeah id still be keen as to see it happen,ive just been busy lately doin a fireblade build

100hp honda · Post by **100hp honda** » March 18th, 2010, 2:57 am

dyno session got post poned. stuz what pipe you putting your money on ?

glen howell · Post by **glen howell** » March 18th, 2010, 12:26 pm

M.F.D.B. · Post by **M.F.D.B.** » March 18th, 2010, 11:47 pm

Since im unbiased ill put my bike up as the dyno mule so no one can say the results were tampered...but I get to keep the winning pipe...

Sack up biches...

CR500R7 · Post by **CR500R7** » March 19th, 2010, 2:15 am

M.F.D.B. wrote:Since im unbiased ill put my bike up as the dyno mule so no one can say the results were tampered...but I get to keep the winning pipe...

Sack up biches...

But it won't do you any good putting it on a YZ450F.

Sorry.

glen howell · Post by **glen howell** » March 19th, 2010, 12:49 pm

glen howell · Post by **glen howell** » March 19th, 2010, 1:13 pm

M.F.D.B. · Post by **M.F.D.B.** » March 19th, 2010, 5:36 pm

Glen I think those pipes look bichin but id give you my left nut if you could counter balance my 500!

glen howell · Post by **glen howell** » March 19th, 2010, 8:06 pm

Gravel Scratcher · Post by **Gravel Scratcher** » March 19th, 2010, 8:59 pm

Glenn,
How do you balance a single ? from what i have read all you are doing is really moving the vibration from one location to another in the rev range to suite a particular type of riding style or are you balancing something else with the crank ?
So far i haven't been convinced about balancing any single, i'm just curious....

Cheers

Paul

glen howell · Post by **glen howell** » March 19th, 2010, 9:30 pm

M.F.D.B. · Post by **M.F.D.B.** » March 19th, 2010, 9:55 pm

glen howell wrote: We have even at our shop rubber mounted a CR-500 what a shaker but the vibes are different.

Bob and I have talked about this before. His theory was that the vibes would be worse? I thought it would help smooth it out...

glen howell · Post by **glen howell** » March 19th, 2010, 10:07 pm

Gravel Scratcher · Post by **Gravel Scratcher** » March 19th, 2010, 10:20 pm

Old british bikes back in the day used rubber mountings and they were reportedly really sweet handling bikes, i think i would be in the camp of improving feel....

britincali · Post by **britincali** » March 19th, 2010, 11:07 pm

glen howell wrote:it shakes like epilectic .

Now thats fukin funny !!!!!

23champ · Post by **23champ** » March 24th, 2010, 3:22 am

so... anyhow, how bout that CPI pipe?

NightBiker07 · Post by **NightBiker07** » March 24th, 2010, 9:02 am

23champ wrote:so... anyhow, how bout that CPI pipe?

so far, it seems that most everyone across the web that has used a CPI pipe likes them, so they make a good product.

as for the characteristics of what the pipe is designed for, you would be best off calling CP Industries and talking to one of the guys over there about it, and from there decide if the pipe would suit your riding style.

If i had to take a guess from looking at the pipe, i would say it is for a narrower, harder hitting powerband rather than a smooth, mellow one.

it would probably suck for woods, and kick ass for drags, hillclimbing, and riding in the sand in general. It would either suck ass or kick ass on a MX track, depending on how well you could control the bike......

stu460 · Post by **stu460** » April 1st, 2010, 8:07 pm

CPI boast 9hp more....sounds ok from here,surely you wouldnt need a dyno to feel an extra 9hp

M.F.D.B. · Post by **M.F.D.B.** » April 1st, 2010, 9:14 pm

stu460 wrote:CPI boast 9hp more....sounds ok from here,surely you wouldnt need a dyno to feel an extra 9hp

Depends on where the 9hp comes in...

speedway501 · Post by **speedway501** » May 2nd, 2010, 3:54 pm

Ran a bone stock CR500 with a CPI pipe and Pro Circuit 304 silencer on the dyno. It made 58.4 rear wheel hp. Advanced the timing about 2 degrees and increased jet size from 170 to 172. A stock standard CR500 with standard pipe on the same dyno ran 51hp (not the same bike). Both engines were fresh. The Dyno is a Dynamics brand.

100hp honda · Post by **100hp honda** » May 2nd, 2010, 4:43 pm

speedway501 wrote:Ran a bone stock CR500 with a CPI pipe and Pro Circuit 304 silencer on the dyno. It made 58.4 rear wheel hp. Advanced the timing about 2 degrees and increased jet size from 170 to 172. A stock standard CR500 with standard pipe on the same dyno ran 51hp (not the same bike). Both engines were fresh. The Dyno is a Dynamics brand.

same thing i said 3-4 months ago with seat of the pants dyno. everyone laughed it off as bullshit. suckers

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » May 2nd, 2010, 7:16 pm

i just built 2 identical boat enignes, 350 chevys, out of the same boat, sameconfiguration, cams ground on a landis, back to back, so there was no bs spec, the grinding wheel was the same size. both decked on the rottler, cranks machined and checked to be the same stroke, heads cc'd + milled the same, same valve job, EVERYTHING. 1 liked 37 degrees, one 31 i think, i have the dynos scanned at work. we swapped carbs to check one against the other, cams were degeed, balancers were marked correct, everything, same ignition ran on both

sabreguy · Post by **sabreguy** » May 2nd, 2010, 7:20 pm

speedway501 wrote:Ran a bone stock CR500 with a CPI pipe and Pro Circuit 304 silencer on the dyno. It made 58.4 rear wheel hp. Advanced the timing about 2 degrees and increased jet size from 170 to 172. A stock standard CR500 with standard pipe on the same dyno ran 51hp (not the same bike). Both engines were fresh. The Dyno is a Dynamics brand.

If it wasn't the same engine it don't mean shit!

BannedCR500Riders.com

CPI pipe -where are the conclusive results?

CPI pipe -where are the conclusive results?

9 HP more from a CPI ?

Re: 9 HP more from a CPI ?