Guys,

Here are pics of some pipes in my stash. Some have been identified, some not. Can any of you help?

Thanks,
Jim

Jim,

I'm have the same problem with a grab bag of tuned pipes Ipicked up.Only thing I could come up with was to match the size of the tuned pipe input to the output size of theheader as the 25, 40, and 60 sized header pipes at Macspro are different sizes. I have several of the same type you have with the screws in the back of the pipe. Would be nice to know what they were.

Regards,

Bryan

Looking at the right hand pic, I have been told the two pipes on the left are old Mac's pipes. Also was told the no. 5 & no. 6 from the left are old Rossi pipes. I believe that info to be correct. Both the old Mac's and both the old Rossi pipes are "straight through". There are baffles/plates visable, but all the holes line up straight through the pipe.

The no. 3, no. 4, and no.7 & no. 8 are unknown; they are larger dia. than the other pipes and somewhat heavier than I think they should be. Still would like to know what they are. These are not "straight through" designs.......

Pipes 3 & 4 look to be Webra and 5 & 6 look to be OPS.

Ron,

I sorta confused the issue by rotating pics 1 & 3 by 180*. I should have put a number on each pipe. Are you looking at the first pic, or the 3rd one?

I believe the ones with screws in them are Super Tigre pipes. I have one on my recently completed and maidened Dirty Birdy. I've loaded a picture that shows the pipe. Performance wise, I got 14,200 on an APC 11X7 on an OS FSR 61. That was with the MAC header cut as noted on their website and no further tuning since it seems to get on the pipe well and the needle isn't critical. After the picture was taken, I chucked it in a lathe and polished it with fine emery cloth. It really made it look much better with very little time spent. I hope this helps.


Chuck

Chuck,

What is the diameter of the main body of your pipe?

Thanks,
Jim

Pattern Student

Using the third photo, starting from left to right. Webra and Super Tigre used screws to hold the rear end inplace but the ST pipe didn't come with a pressure tape.
Not saying that someone did not add it later but the pressure tape also looks to be Webra.

I was going to say that the last two smaller 7 & 8 pipes have the typical Hatori cone at the tail end. Perhaps they are older Hatori pipes. I have Hatori 200 for 21 engines that has a similar design. I suspect that those pipes are for 25-32 size engines.

David.

Hi Pattern Student,

I measured my pipe's OD and it comes out as 1.57 inches. Ron is right, ST pipes didn't have a pressure tap as manufactured, but since that picture I've added one to mine and polished the pipe as noted. I had another one twenty years ago and put a tap in that one, too, so I guess it may be common to find one with a tap. But the OD doesn't match the pipe with the screws as you have it marked, so it isn't a ST 60 sized pipe. They may have made a 90 sized pipe but I have never seen one.

Chuck