Remove the divider on the manifold exhaust outlet?

[Onefast99gsx]

I didn't think this was a tech question. More of an opinion thing so i put it in the parking lot.

I'm gonna enlarge the outlet on my 99 GSX exhaust manifold so it matches the PTE 50trim 7cm inlet.

I was on tuners and i see some people remove that tall divider and some keep it. Some say if you remove it, there will be more turbulence. What's your take on this and experience. I see there is cracks on both sides of it but then i've never see one that didn't crack along the divider.

Keep it or dump the divider?

Thanks

[Raptor]

I used to remove them, I don't anymore, there is more benefit from the divider than removing it.

[Onefast99gsx]

Thanks Raptor. I totally agree. I removed it once too on an old car but now i don't think it restricts anything. I think it directs the flow of traffic from the exhaust more than anything.

[john]

I think mine is gone but I think you are wasting your time if you touch it anyhow. It takes a long time to port cast and I do not think you would have any increase.

[JET]

Long time to port cast? Try porting the EVO3 turbo's once!

Definately do not remove the divider, that will cause a decrease in performance. Leave it there, but you can thin it up some.

[Raptor]

I agree, EVO3s suck, I charge double for porting them, what a PITA....

[niterydr]

I think mine is gone but I think you are wasting your time if you touch it anyhow. It takes a long time to port cast and I do not think you would have any increase.
While your at it, why port anything? I bet there isn't any gain in porting heads/turbo's/o2 housings/manifolds...... :rolleyes:
Just because it isn't fast and easy, doesn't mean it isn't worthwhile.

[JET]

I agree Swanny.

[Raptor]

I think he is referring directly to the divider, not porting in general. I have ported a ton of stuff for the HORT boys and as far as I know, they believe in porting. I think Johns point is that with the time required to remove that divider, if it doesn't make an improvement is probably not worth doing. I am sure that you are better off leaving it in place to direct exhaust flow and segregate the pulses any way so removing it is a futile labor at best.

[AJ]

When referring to the divider on the turbo just so people don't mistake this for that ring that's in the stock turbo. I just had someone ask me off the site so I figured I would let them know. If anyone wants to get into the divider and porting and the rign and all the fun differances and + and - of all of it feel free to post it up in a tech thread in FI.