General Question about injector size?
#1
Junior Member
Thread Starter
Join Date: Oct 2006
Location: Columbia, SC
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
General Question about injector size?
I am still new at the rx7 . but why do they put larger cc inj. as sec. and smaller cc. as the pri. and not the other way around. Are the sec. for the top in or long haul?
#2
Crash Auto?Fix Auto.
iTrader: (3)
stock 7's came with the same size in all 4 holes.
As the words would indicate...primary is the first, and secondary is, well, secondary. Secondaries come on-line (on the stock ECU) around 3500-3800rpm, depending on load.
The reason people put smaller primaries in is because huge secondaries would be pouring gas into the motor at idle, smaller primaries can run the engine at low loads/speeds more efficiently.
As the words would indicate...primary is the first, and secondary is, well, secondary. Secondaries come on-line (on the stock ECU) around 3500-3800rpm, depending on load.
The reason people put smaller primaries in is because huge secondaries would be pouring gas into the motor at idle, smaller primaries can run the engine at low loads/speeds more efficiently.
#3
Junior Member
Thread Starter
Join Date: Oct 2006
Location: Columbia, SC
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
So another way to save gas is not to rev past 3500 so the secondarys dont cut on, and if you make the secondary inj. larger the more load the motor can handle at higher rev.
#5
Rotaries confuse me
iTrader: (7)
Originally Posted by TjsRx7
So another way to save gas is not to rev past 3500 so the secondarys dont cut on, and if you make the secondary inj. larger the more load the motor can handle at higher rev.
With a bridgeport, your powerband shifts upward. Basically, you have "no" power under a certain rpm depending on the bridge (ex. 4000 rpm). Have fun with that on the street...
Last edited by My5ABaby; 11-06-06 at 04:49 PM.
#6
Junior Member
Thread Starter
Join Date: Oct 2006
Location: Columbia, SC
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
With a bridgeport, your powerband shifts upward. Basically, you have "no" power under a certain rpm depending on the bridge (ex. 4000 rpm). Have fun with that on the street...
Thread
Thread Starter
Forum
Replies
Last Post
Frisky Arab
2nd Generation Specific (1986-1992)
13
08-18-15 05:30 PM
KAL797
Test Area 51
0
08-11-15 03:47 PM