info needed on turbo sizes

[arcticwolf]

Do any of you Indianapolis fanatics know what size the Garrett turbos were that they used on the Offy engines around 73 - 75? I don't mean boost, I mean the inlet size, was it 2 1/2, 3, 4 inches? I can't seem to find that info anywhere?

Thx Paul

[Chris]

If you can find out what specific turbo a given car used , yes they varied by q-day, practice, track , etc Garrett hs full specs by model on most, see attached example
www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/gt3071r/ they list all the info size, diameter, hose size etc.. Hope that helps.. Chris

[racewrench87]

checked with a friend, ..........
3.5" inner width, 9.5" bell OD.

[arcticwolf]

Thank you guys. 3.5" makes it one of the bigger ones, I can work with that.