A couple of ??? Would the all in one design of the London Stainless affect it's ability to be ceramic coated. Obviously you don't want the flex joint or the cat coated. I just don't know if you can stick part of something in the vat and have it work, probably but don't know. Could welding the Super Sprint's flex joint, on to the OEM cat, cause a problem with the cat? Does anyone know the diameter of the Super Sprint Y pipe after it Y's. Borla chokes theirs down to 1.5" I'm told and that's to small by my figures. A 2.25" pipe should Y into nothing smaller than two 1.625" pipes and a 2.5" pipe should Y into nothing smaller than two 1.75" pipes or the flow will be restricted and that's not even considering the angle of the Y or the increased drag on the air flow from the increased surface area of two smaller pipes vs. one larger.

 

as to tube sizes: "the supersprint header (photo on the mini2 forum). It is 2 into 1, 2 into 1, with cylinders 1 and 4 collected, 2 and 3 collected (1-5/8 tubes) then the collected tubes (1-3/4) collect again into 2-1/2, ending in a ball joint."

the stock cat has standard tubular extensions on it, you weld to one of those, it is no prob.

 

Just took some measurements on the London Stainless header, primaries are 1-1/2" and are collected into an apx. 2-3/8" collector before and after the flex joint, this 2-3/8" pipe then goes to the CAT which exits into a 2-1/2" pipe.

_________________
2001 & 2002 SCCA, STS, Pro Solo National Champion

 

It looks like the Supersprint header has longer primaries too--is that just an illusion caused by the lack of a cat and/or the bulky collector on the London stainless? It would be great if people out there are taking some measurements of the different systems if we could also learn more about the *length* of the primaries. My understanding is that there are two key variables to consider: 1) diameter of primaries/secondaries (and how they come together, eg if the collection point is unnecessarily restrictive), and 2) the length of the primaries, which affects the speed of the exhaust gases. I'm sure the relationship between the two variables and torque/HP is complicated but I was always told that the longer the primaries the better the low-end torque.

Is that right? If not, please correct since I don't want to spread any misinformation--especially since we don't have dyno numbers yet.

 

Can anybody measured the primary lengths and secondary lengths for me? Im in the process of trying to develop a better more cost effective header.....

 

God bless you man!!!
At last, someone coming to our rescue. The prices on the ones in the market now are ridiculous. If you could make a price competitive one that matches in performance and build, you'd make a killing.
Good luck. I, for one, will be rooting for you.

 

DANG you pictures no longer working. It should be a rule that you can never take down the pictures of a DIY thread...

 

Yeah, pic fix would be great

 

Here HERE!!!

I'm starting mine in 2 days