h.p on aftermarket exhausts,is it a hype

[QCRider]

weight savings and change of exhaust gained me .03 in the 1/4 mile on the RX1. That is a huge gain! Carb springs gave me .01 better in the 1/4 mile. Both of these mods cost me less than $500

Carb sync, which I did myself, made throttle response better, and ran smoother without the hassle of hitting the throttle to start the engine when warm.

All of these mods have been tried and tested, and are under the asphalt results topics under the racing thread. I know there are a lot of pages, but all of the info is worth the reading from 2003, 2004, 2005

Are you guys getting this? I mean seriously, for NOS-PRO these numbers are very significant, but come on, on a trail? A lake? .04 seconds total gain? You would never notice it, no way, no how. I understand why they matter so much if you are racing for money or whatever, but there is just way way I would spend $25 dollars to gain .04 seconds in a quarter of a mile across a lake, nevermind $500.

 

[shanksRX-1]

weight savings and change of exhaust gained me .03 in the 1/4 mile on the RX1. That is a huge gain! Carb springs gave me .01 better in the 1/4 mile. Both of these mods cost me less than $500

Carb sync, which I did myself, made throttle response better, and ran smoother without the hassle of hitting the throttle to start the engine when warm.

All of these mods have been tried and tested, and are under the asphalt results topics under the racing thread. I know there are a lot of pages, but all of the info is worth the reading from 2003, 2004, 2005

Are you guys getting this? I mean seriously, for NOS-PRO these numbers are very significant, but come on, on a trail? A lake? .04 seconds total gain? You would never notice it, no way, no how. I understand why they matter so much if you are racing for money or whatever, but there is just way way I would spend $25 dollars to gain .04 seconds in a quarter of a mile across a lake, nevermind $500.

I think im with ya on that one. If you are gunna drag race all the time and you need every little bit you can get then ya but for the average rider I think the power gain to money ratio is way way off. on a 2 stroke, Yes you gain nicely from an aftermarket exhaust but on a 4 stroke your exhaust output is mostly controlled by your valves so your exhaust can only flow what the valves allow it to flow. IDK its all up to the person. If I had alot of extra $$ then I might get an exhaust but with gas prices the way they are I can definately think of other places to put that $500 then into a noise maker...

 

[rxwhopper]

i agree, the aftermarket is loud, and i think sound like crap. chevette without a muffler imo

 

[otis]

after market exhaust

I have to differ on the opinions here so far. I have the ECP with evac and White Knuckle QC-1 exhaust and love it. The ECP was OK, but when you get more air in and more air out thru a non restrictive exhaust it really opens up the mid range. It's much faster and I can stay even with my other riding buddies on an Attak and Apex and we only differ on who gets the best hookup at launch. From a roll we are even. Before I was 2-3 sleds behind with stock clutching. Only difference now is the exhaust. If I remember Freddie with ECP mentioned non restrictive exhaust was good for another 8 HP with his ECP kit. Some one can post this to be accurate.

As far as the sound I like it. At idle it's more raspy and will turn some heads, but at trail speeds I would argue if you could tell it was any louder. Some exhausts are over the top, but at least I like mine for what it's worth.

Otis

 

[shanksRX-1]

Re: after market exhaust

I have to differ on the opinions here so far. I have the ECP with evac and White Knuckle QC-1 exhaust and love it. The ECP was OK, but when you get more air in and more air out thru a non restrictive exhaust it really opens up the mid range. It's much faster and I can stay even with my other riding buddies on an Attak and Apex and we only differ on who gets the best hookup at launch. From a roll we are even. Before I was 2-3 sleds behind with stock clutching. Only difference now is the exhaust. If I remember Freddie with ECP mentioned non restrictive exhaust was good for another 8 HP with his ECP kit. Some one can post this to be accurate.

As far as the sound I like it. At idle it's more raspy and will turn some heads, but at trail speeds I would argue if you could tell it was any louder. Some exhausts are over the top, but at least I like mine for what it's worth.

Otis

Im just wondering how much $$ and setup time you have invested? I had a major problem with an intake I had years ago, it was sucking in too much snow and I lost about 4 hp from rounding off my rings and only gained 2hp from the intake. I have been reluctant to touch an intake on a sled ever since.

I also dont want to spend countless hours trying to jet in 4 carbs to run with differnt mods.

 

[otis]

It took about 2 hours to install the exhaust and 2 hours for the ECP and evac setup. The ECP from Freddie was $200 (I supplied my own plugs at $10 each) and I got the exhaust used with ceramic coating for $275 shipped.

$500 gets you 18 horsepower at 6000 RPMs with another 2 for the evac
plus 8 for the exhaust; totals about 28 horsepower. Thats not peak power most would argue that peak is closer to 10 - 15HP with these mods. I would argue 30 HP in the midrange still rocks.

Money well spent

Otis

03 RX-1 ER with Simmons flexiskis, 04 CDI, pioneer 46" wide front end kit, ECP with evac, 1 1/4 ripsaw, 06 Apex RTX rear skid with big boy spring, White Knuckle QC-1 exhaust with ceramic coating, 5" seat foam mod, autometer phantom water temp gauge

 

[yamahajunkie]

Re: after market exhaust

I have to differ on the opinions here so far. I have the ECP with evac and White Knuckle QC-1 exhaust and love it. The ECP was OK, but when you get more air in and more air out thru a non restrictive exhaust it really opens up the mid range. It's much faster and I can stay even with my other riding buddies on an Attak and Apex and we only differ on who gets the best hookup at launch. From a roll we are even. Before I was 2-3 sleds behind with stock clutching. Only difference now is the exhaust. If I remember Freddie with ECP mentioned non restrictive exhaust was good for another 8 HP with his ECP kit. Some one can post this to be accurate.

As far as the sound I like it. At idle it's more raspy and will turn some heads, but at trail speeds I would argue if you could tell it was any louder. Some exhausts are over the top, but at least I like mine for what it's worth.

Otis

very nice otis!!! way to tune it up!!! 1+1+1=3 when mods are put together right, the rx if perform with fuel injection if not take them.

 

[rxwhopper]

i dont mean to be rude otis, but your dreamin, next weekend i will dyno mine, it has ecp with evac and a opened up stock exhaust.most make 135 stock, i should see at least 145 at peak if i am up 10 h.p . i bet i wont see 2 h.p. i am thinkin i will see it in the mid like freddie says with the filters but thats it, we will see

 

[yamahajunkie]

i would like to comment whopper. if 2 differnent sleds start from point a and end at point b, and they are neck and neck. one is rated 135hp and one 150hp. the 135hp sled is modded. do you really have to dyno it to make your point that the mods work. one question.... why would dyno if you know you only have 2-10 extra hp? run it on the snow and race, run it on the grass and race. at least you get race and have fun to see where your at.

 

[JDMCRX]

Meh 8 lbs here 10lbs here, 8 lbs here it all adds up in a lighter sled. Its part of the modding process. I wanna take 30-50lbs of fmy warrior to make it a bit lighter.

Josh

 

[rxwhopper]

the biggest thing for me to dyno is, for 1 its free. and for 2 i want to see if running the exhaust is better or worse.i would rather have it qyiet if it is the same h.p. if it make 2 h.p . i am in. but i am always worried about the h.p. loss when modding also. it does happen.i dynoe d my sxr piped bender portted, reeds . all add up to what bender says was 150 plus h.p. it came in at 135 h.pthere claims dont add up most of the time.

 

[shanksRX-1]

I could go on a diet and take 50lbs off my ride just like that.... But I like beer and chicken wings. lol

I just love my sled and my wife wont let me keep spending money on it so if I mod it there goes my allowance and if it breaks and I have to spend more money she will be really happy with me.... I think im gunna just ride it for now and like it the way it is.

My buddy has an 05 fusion 900 with slp pipe, intake, ecu, v force 3s, shaved head, studs, all updated motor mounts and torqu arms and we only raced one time in a 1/4 mile and when I got to the end I looked back and his hood was up. Very familiar sight, he said he was catching up to me and he blew a belt, another quite familiar story... Well in the end the rx-1 was at the end first and the polaris had the hood up so the story ends the same as they always seem to.

 

[JDMCRX]

I do not have a wife nore a House rrrr. House soon .

 

[otis]

I only quote what Freddie from ECP has previously listed for horsepower gains. If I am not mistaken ALL dynos are not really meant for benchmark horsepower ratings, but are only useful as a measure of improvement. You can calibrate the the thing to read whatever you want via drivetrain loss equations and altitude and temperature/humidity compensation formulas. The real reason to dyno is to measure before and after modifications in the same environment, with the same machine, on the same dyno. Until you have that data the raw numbers are subject to manipulation and interpretation. I really don't know what to believe number wise, but I can tell you that the machine is much faster by allowing it to breath in and out better. The best thing about the aftermarket exhaust is the over 10lb weight savings.

Otis