Technical Building a injection box for a 671

A friend is restoring a 70s dragster and has asked me to reverse engineer and build the injector for atop a 671 blower. Originally they had a Hilborn setup on there but all of this stuff is missing. They want it to look like the Hilborn and be functional but it won’t race again.

Could someone please provide me with the dimensions of the top of the 671 blower? I am looking for the dims in the photo.

also if someone has a 70’s Hilborn injector and scoop, some vernier caliber s, and some time, I’d love to chat...

 

Umm...you're missing a somewhat critical dimension (2 actually).
The dimensions between the fastener centerlines and...the edge of the flanges. These would be the second most important dimensions needed.
Between D2 and D5
Between D3 and D4
You NEED these to verify that the flange and the fastener locations are located in the correct location.

Mike

 

Buy a screen-gasket. Lippy

 

That’s my next move if I can’t get some dims today... or just go get the dims off the blower 50 miles away...

 

4-1/2" X 13-1/4 are the perimeter bolt locations 6-5/8" are the centers

 

Thank you!

Any idea on the outside and inside dimensions on the gasket surfaces?

A million 'thankyous'!

 

14" X 5-1/4" & 12-1/8" X 3-7/8"