7.5 equi pipe length

[bob miller]

has anyone tried running a 7.5 equi pipe on a 7.5 k/b red head .....if so what length worked best.....thanks.....bob

 

[Geraghty]

has anyone tried running a 7.5 equi pipe on a 7.5 k/b red head .....if so what length worked best.....thanks.....bob

Post a photo of the pipe that you have..... I don't believe John Equi ever made a 7.5 pipe......He only made 3.5 pipes....
As I recall Tommy Lee welded a Irwin nitro pipe center section in between a Equi 3.5 inlet and outlet section.....
If Tommy reads this he might be able to add some more detail to this thread.....

 

[bob miller]

i cant post photos ....the pipe i,m refering to was handled by bob kensill

 

[bob miller]

the pipe i,m refereing to might be the equalizer 7.5 .....bob

 

[Carl Van Houten]

The pipe you guys are referring to is called a "Equi Big Belly Pipe" and was first made by Tommy Lee by welding an Irwin center section into an Equi outboard pipe.

 

[bob miller]

thanks for the info ....what is a good starting length for a k/b 45 red head .....thanks ,,,,,bob

 

[Alan Elzer]

If you have the header that it sides on start w about 3/4" between pipe inlet & header. Then make small adjustments in.. All depends on hull type, prop size & % fuel.

 

[RonShaw]

has anyone tried running a 7.5 equi pipe on a 7.5 k/b red head .....if so what length worked best.....thanks.....bob

Bob,
Can you post a pic? Is that the original Equi 7.5cc pipe or the big belly pipe Carl described above?

 

[bob miller]

sorry ...i cant post pics

 

[Alan Elzer]

The 7.5 & 3.5 pipe body is the same, only difference was he put a larger stinger on 7.5

 

[RonShaw]

The 7.5 & 3.5 pipe body is the same, only difference was he put a larger stinger on 7.5

Alan,
Yes. The original 7.5 equi was basically the same but with larger stinger. Not sure if Bob has the original pipe or modified Equi “big belly” Carl references above. Due to the smaller volume, the original needs to be run much longer than the big belly pipe which can be shortened significantly. Bob,
If you email a pic of the pipe to me at [email protected] I will post it for you.

 

[RonShaw]

 

[RonShaw]

Bob,
That is a 60 Equi big belly but looks the same as 7.5 Equi big belly pipe. You can see the Equi original header and stinger curved ends.

 

[RonShaw]

 

[RonShaw]

Original Equi (this is 3.5 but looks the same with larger stinger). Which one do you have?

 

[rumrunner]

Best pipes ever lol

 

[Mark Bullard]

Some where around here I have the one of the first 7.5 Equi pipes. I think it is number two or three. It is a hammered pipe that John made that a few of us were welding them together. So we traded welds for pipes. Here are some pictures. And the bid starts? LOL

 

[bob miller]

View attachment 284205

my pipe looks identical to your pipe

 

[bob miller]

i have all three of those pipes

 

[RonShaw]

i have all three of those pipes

Ok. The big belly pipe runs great on most all 7.5 outboard engines. 3” from the header end to the center of the 90 degree where it turns up to the engine is a great starting point for this pipe.