Fuel Injector Sizing Bayswater | Fuel Injection
- Author Robbie Mcqueen
- Published October 27, 2010
- Word count 378
One of the things when selecting injectors for your car, or for your engine, is to know, what type of injector you want. One of the biggest things you need to know when selecting injectors is the o-ring size of the injector.
Some injectors come in 14mm o-ring size, and others come with 11mm o-rings. The dimension from o-ring to o-ring is a big thing.
Some injectors have 2 o-rings on them (one at each end), meaning it seals in the manifold with an o-ring, and it also seals in the fuel rail with an o-ring.
Another type of injector has an o-ring at the fuel rail end, and a buffer seal at the manifold end.
This is very important if you are going to start to run some boost, and you don't want to lose boost past where the injector sits. So, the correct placement and the correct injector is a big thing for high performance and big drivability.
There is another type of injector. It has a 14mm recess, but you can fit an 11mm o-ring to it. That may be perfect to help with the scenario of your car. This all comes back to working out what size injector you want for your engine.
You can also see there that we have different styles of connectors for different vehicles. Once again, generally you can match the injector to the car to save any kind of further cost and effort in wiring.
One of the other big issues with injectors that we come across a lot is that people go too big with their injectors. They always think that 800 or 1,000cc injectors is what you need. You can match an injector to the power rating of what the car requirements are.
This is very easily done. On average it takes 5cc of fuel injector size for every horse power the car wants to produce. This is an equation that we use quite often in the trade.
For example, if a car was to produce 400hp, we would install injectors that would supply 450hp. There is no reason to put injectors in it so it can go to 1,000hp.
It is a waist of time, and the drivability down low, at idle and fuel economy is not there.
Robbie McQueen is an expert in dyno tuning electronic fuel injection and engine management systems in Bayswater, Melbourne, Australia.
You can find out more information about Robbie McQueen and engine management system tuning at http://www.wolfems.com
He can be reached at 03 9761 3609.
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