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Post by RedBeauty84ZX on Apr 1, 2005 2:51:40 GMT -5
I know this is a dumb question, but im still new to rotarys. I was wondering why rx7's have primary and secondary injectors?
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Post by hypothermix on Apr 1, 2005 9:48:54 GMT -5
not a dumb question. I couldn't give you a answer without looking it up
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Post by DriftHappy on Apr 1, 2005 11:31:58 GMT -5
I do believe because Mazda did'nt want to run 2-1000cc injectors and it was probably more efficient to run 2 sets of 2, than to put all 4 in a row. But that's just probably B.S..
The '84-'85 GSL-SE were the first EFI Rotaries and they were just equiped with 2- 680cc injectors.
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Post by hypothermix on Apr 1, 2005 13:23:15 GMT -5
thats what i thought.
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Post by RedBeauty84ZX on Apr 2, 2005 18:00:36 GMT -5
Thanks for the replys, thats been bugging me for a while.
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Post by rxkevin on Apr 6, 2005 22:04:08 GMT -5
they did two set of injectors also for a better idle... thats why if you put to big of an injector in your primary position it is real hard to get a smoth and not overly rich idle. By the way the primarys do the low load injecting untile you get into high load and thats when all injectors are working at once.
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Post by razorback on Sept 18, 2005 6:45:47 GMT -5
its due to the timing and etc, secondary injectors come on after 3k rpm. rotarys use alot more fuel in the upper rpms. so its just easier to stage the injectors like that. fds have 550/850 t2s hard 550/550, na's have..460/460 (one might use 640 cc for secondary injectors) thats all i know off hand.
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Post by rxkevin on Sept 18, 2005 20:43:17 GMT -5
its due to the timing and etc how does is it that its due to the timing? I just thought that the higher the load the more fuel the motor needs. |
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Post by razorback on Sept 19, 2005 13:07:55 GMT -5
err i wrote that half asleep, i meant staging.
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