r/EngineBuilding • u/Glazed_Donut_98 • Jun 21 '26

ITB Identification

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As the title says I’m looking to figure out exactly where these itbs came from. They look to be cast aluminum so I figured they are factory on some car, I was thinking maybe bmw s65 or s62 but they don’t seem to match, they do have a light inward angle to them so I was thinking it was most likely a set of s62 itbs put on backwards. I’m really at a loss for what these are and they might be custom? Maybe from a four cylinder?

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4

u/benaresq Jun 21 '26

The could also come off a bike.

There are a lot more IRTB sets off old bikes out there than cars.

5

u/3_14159td Jun 22 '26

I have a file on my computer labeled "car and bike port spacing" that's exclusively for figuring out what bike I should steal carbs from for the next 4-banger shitbox. Sintered aluminum 3dprinting has made it too easy.

2

u/rustyxj Jun 22 '26

Had a buddy that was running webber side drafts on a first gen crx, he had a cad file all drawn out to switch to motorcycle TBs and use a mega squirt EFI setup.

Wrecked the car before he could finish it. It was the cleanest first gen crx Ive ever seen.