Quote:
Originally Posted by Raceboy
I really have a hard time understanding what the expert guy means by "outperforming" because I can't see anything in carbs that could even be remotely better than EFI with ITB's. Maybe he meant carbs compared to regular common plenum EFI? Even then it is not true, because with any decent EFI you can tune acceleration enrichment and advance so that it pretty much matches individual throttles, though ITB's+ EFI is still a bit better.
Here's few comparison points regarding fuel compared carbs to EFI:
1. Injection timing can be changed to desired position in crank degrees, on carbs, not.
2. Fuel atomization is better on EFI due to finer nozzle and higher fuel pressure.
3. You can place the injectors anywhere you like in the intake based on your application (mostly rpm limit).
And that is fuel only, then there's the ignition.
Regarding price, it is easy to spend thousands of dollars if you buy all things from Clewett but you can get/make the same things much cheaper and still get the same result. Even look-wise if you care for anodizing and such.
There are several ECUs that have many (really working) funtions and are affordable: VEMS (my preference), Omex 600, LINK/Vipec, MSIII) etc.
If you do 95% of the work yourself, you can get EFI for less than $2000 (~$800 ECU, 1200 for fuel injectors, rails, FPR, coil-pack etc).
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I wholeheartedly agree that EFI is a far more versatile system and can generally out perform most other types but cost is always a factor.
Can you show (pictures) a complete EFI system installed on a 911 engine that costs less than $ 2,000.
BTW: when you consider cost, labor is always a factor. Your labor may be valueless but mine certainly is not.