What the hell?

**sidecar bob** · 4th September 2011, 20:41

I wrapped two perfect BMW headers on my R100rs Turbo, 12 months later I unwrapped them looking for a loss in performance & they were fucked. The nice U bend was a series of sharp kinks, one nearly blocking the pipe right off.
Obviously they had been permanently red hot & had grown so much the pipe had to go somwhere.
I wouldnt bother with wrap again, I will HPC the current ones sometime.

**Sable** · 4th September 2011, 20:42

It's not worth it and it won't do shit. Maybe on a large displacement Harley garbage pump but not on a 250, and even then the difference is so marginal if the dyno didnt show it you probably wouldn't notice it.

**Crasherfromwayback** · 4th September 2011, 20:49

Originally Posted by nzspokes

So ive got a single with 2 exhaust ports and 2 complete separate exhausts. So If I were to wrap how far do I go as I dont have a collector?

I'd need our dyno to tell you the correct answer sorry mate!

**Crasherfromwayback** · 4th September 2011, 20:52

Originally Posted by Sable

It's not worth it and it won't do shit. Maybe on a large displacement Harley garbage pump but not on a 250, and even then the difference is so marginal if the dyno didnt show it you probably wouldn't notice it.

Wouldn't call an 883 a large displacement bike. By now...you really should be wearing a bib you're talking that much shit.

**bogan** · 4th September 2011, 21:04

Originally Posted by Sable

It's not worth it and it won't do shit. Maybe on a large displacement Harley garbage pump but not on a 250, and even then the difference is so marginal if the dyno didnt show it you probably wouldn't notice it.

Going to come down to a single cylinders displacement though isn't it? 250 single be similar to a 1000 IL4 but lower revving, sure with 4x the headers you'd get 4x the gain but the proportion increase should still be similar in theory right? And with twin headers on the one cylinder, the surface area is going to be even bigger, so provides more cooling.

**ducatilover** · 4th September 2011, 21:12

Originally Posted by Sable

It's not worth it and it won't do shit. Maybe on a large displacement Harley garbage pump but not on a 250, and even then the difference is so marginal if the dyno didnt show it you probably wouldn't notice it.

You'd probably find it'll do more in terms of percentage of power gain on a 250 than a garbage pump, the 250's will have thinner walled manifolds and 'zorsts, ergo they lose more heat through the walls of the exhaust = less gas velocity.

Or something.

**White trash** · 5th September 2011, 07:38

Originally Posted by Sable

VFR400 caliper and master, billet adaptor, braided line, drilled disc, braced swingarm, clipons, fibreglass seat, Boyesen reeds TS125ER pistons professional porting and squish setup skimmed separated head copper head gasket.

Looks a bit funny but it wasn't built for looks, it was made out of junk and cost $400.

Sweet. Show us the pictures?

As you well know, we all customise our bikes for different reasons and to gain different effect. Hating on a guys bike because it doesn't fit your idea of how it should be is a little one eyed is all.

And yeah, I think it's an improvement on the standard one.

**White trash** · 5th September 2011, 07:39

Originally Posted by ktm

Who are you calling a "Fuckwit" ? Name-calling is never nice. Start running.......

Have I ever claimed to be "nice"? And running from what?

**sidecar bob** · 5th September 2011, 08:33

Originally Posted by White trash

Sweet. Show us the pictures?

As you well know, we all customise our bikes for different reasons and to gain different effect. Hating on a guys bike because it doesn't fit your idea of how it should be is a little one eyed is all.

Yep, and anyone that thinks the GB is a dogs breakfast hasnt looked at ther rest of the guys listings.

**nzspokes** · 5th September 2011, 09:00

Originally Posted by Crasherfromwayback

I'd need our dyno to tell you the correct answer sorry mate!

Wonder If I wrap them to different places I will get mora torques and BHP?

**Sable** · 5th September 2011, 09:15

Originally Posted by White trash

Sweet. Show us the pictures?

As you well know, we all customise our bikes for different reasons and to gain different effect. Hating on a guys bike because it doesn't fit your idea of how it should be is a little one eyed is all.

And yeah, I think it's an improvement on the standard one.

Originally Posted by sidecar bob

Yep, and anyone that thinks the GB is a dogs breakfast hasnt looked at ther rest of the guys listings.

They're on my profile. I actually thought his 'bobbers' were alright.