Datsun Roadster Forum-311s.org

Looks like Julian recently sold his individual throttle bodies he was using on his KA powered 510 on eBay. Here are a couple shots from the auction:







Michael

Those are pretty cool pictures, I’m interested in this, considering building a FI for my R/H motor some where down the line.

Couple of things I noticed, the FI system on the white car with the stacks must be MAP (manifold pressure) system where as “Julians� system is a MAF (air flow). To answer Adrian question, Nissan uses a MAF so the ITB with the stacks would need a standalone system to work. The other one with the plenum looks to have a MAF so the “stock� computer (needs to be worked over) would probably work. Which leads me to this observation: its seems to me that with all things being equal, a single TB w/plenum/MAF will perform better than the ITB setup w/plenum/MAF. The thought is that a well designed plenum will create a supercharging effect and having an unobstructed path to the cylinder (without ITB) will provide better air flow. I’m wondering if this system is being sold because it had marginal improvements over a single TB set-up. Still the ITB’s really look nice under the hood.