Full M4 exhaust arrives

Originally Posted by hongman

Interesting

So this extra BHP - all down to smoother/stronger delivery (i.e torque) as opposed to top end? How noticeable is it?

I wish I knew how to post the dyno chart...

The chart shows it picks up from the middle of the rev range and by about 8000rpm it's knocking out the extra power to the redline. That's how it feels to ride too. I'm having to recalibrate the braincell as it'll pick up quicker and hold on to the power longer. The extra noise takes a bit of getting used to and is forcing further recalibration of the noggin.

Shame it's nearly back in the garage time...

Mark

So envious!

How much did this cost you in total including the dyno time etc?

Originally Posted by hongman

So envious!

How much did this cost you in total including the dyno time etc?

Just over £800...

That's cheap for that order of benefit though!

It has to be said that I was going to spend a bunch of money on getting a project SV but then decided to improve what I had. I could push it and claim I saved myself a bunch of cash but that gets too close to the man-maths stereotype for comfort.

Mark

[andrewsmith]

10 Brake from a Zorst.
What type of Dyno is it?

Did you buy the exhaust from the same guy who did the dyno?

Can you post before and after charts (were they on the same day on the same dyno)?

And what type of dyno?

10Bhp is an awful lot just from a system (a bit too much really) you would expect 4-5bhp max even with the cat out.

For a race setup 10bhp is usually system, airfilter, 520 conversion and a cam change (either cam swap for curvy or curvy inlet for pointy).

I also thought Power Commanders were a bit defunct on SV's doesn't Steve Jordan just reprogrammes the stock ECU for power gains.

Btw you know you can make a dyno read anything you want dont you?

Originally Posted by hardhat_harry

Did you buy the exhaust from the same guy who did the dyno?

Can you post before and after charts (were they on the same day on the same dyno)?

And what type of dyno?

10Bhp is an awful lot just from a system (a bit too much really) you would expect 4-5bhp max even with the cat out.

For a race setup 10bhp is usually system, airfilter, 520 conversion and a cam change (either cam swap for curvy or curvy inlet for pointy).

I also thought Power Commanders were a bit defunct on SV's doesn't Steve Jordan just reprogrammes the stock ECU for power gains.

Btw you know you can make a dyno read anything you want dont you?

It is a Dynojet dyno run by MoreMoto in Bury St Edmunds.

Chart shows the first run as it came in the door at 65.42 and the fifth run following pipe fitting and ECU tweaks at 75.22

I understand that these things can be fluffed up to look better than they are but I can't see why they'd bother particularly. It seems they have a fairly good rep. Mind you, I believed that Lance rode clean so what do I know...

I have a dyno chart but I'm not sure how to post it.

Mark

[yorkie_chris]

Is it electronic or paper? First thing to do is get it into an image file then upload it somewhere like imageshack

U could always take a picture with your mobile phone then as YC says send it to imageshack or photobucket then copy the image link into a post on SV.org

Originally Posted by yorkie_chris

Is it electronic or paper? First thing to do is get it into an image file then upload it somewhere like imageshack

I'll try this:

http://imageshack.us/photo/my-images...dynochart.pdf/

Thanks for the info.

Mark

Why has the dyno guy put top speed instead of revs on the horizontal axis - bizarre? especially as it looks to be a 5th gear run not a top speed run (unless your bike really does only have a top speed of 105mph)

No torque reading either

Also your chart is very flat at the top end as if the bike is not revving out properly.

And he should have reduced the scale on the verticle axis on the air fuel mix whats the point of showing a flat line

the dyno should be setup to display like this (but this one doesnt have a recalibrated air fuel either)

I will see if I can find my old SV dyno sheet

Btw the 8Bhp gain on a blackbird was gained with a micron system, K+N and power commander