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sean210
12-15-2007, 02:35 PM
Someone gave me injectors out of a 91/turbo. I know that they are a bigger cc but will they fit in my 89/ n/a?
Nalleywhacker
12-15-2007, 03:14 PM
yes
AJ'S 88NA
12-15-2007, 04:15 PM
They are bigger and you will run rich without a means of adjusting the AFR.
7M-fanatic
12-15-2007, 05:37 PM
They will fit the fuel rail, But your injector plugs won't fit them.
And they are WAY TOO BIG for a NA car !!

I run stock size injectors on my NA, and it has cams, Hi comp pistons, big valves, a 70mm throttle, headers, and an 80mm exhaust......
And they are just fine, with the use of a S-AFC and an adjustable fuel pressure regulator.
ill Z
12-16-2007, 03:07 PM
Correct me if I'm wrong, but doesn't larger injectors not have anything to do with pushing more fuel? You would need other supporting mods to get there, 440cc's is just refering to the maximum amount of fuel you can acheive from them?
CRE
12-16-2007, 03:28 PM
Correct me if I'm wrong, but doesn't larger injectors not have anything to do with pushing more fuel? You would need other supporting mods to get there, 440cc's is just refering to the maximum amount of fuel you can acheive from them?

Consider yourself corrected. ;)

Yes, 440cc's refers to the flow at a duty cycle of 100%. However, to get there the entire scale of the injector is raised. 440cc injectors typically flow 25% more than 330cc injectors at any given duty cycle.
Nalleywhacker
12-16-2007, 06:08 PM
Correct me if I'm wrong, but doesn't larger injectors not have anything to do with pushing more fuel? You would need other supporting mods to get there, 440cc's is just refering to the maximum amount of fuel you can acheive from them?

yes they would push more fuel cause your putting larger injectors in but the fuel pressure is staying the same, so more fuel, if you have a fpr and turn down your pressure you can run larger injectors with the same amount of fuel as stock though theres no point in doing that cause the fuel doesnt adamise as well.
7M-fanatic
12-17-2007, 09:05 AM
yes they would push more fuel cause your putting larger injectors in but the fuel pressure is staying the same, so more fuel, if you have a fpr and turn down your pressure you can run larger injectors with the same amount of fuel as stock though theres no point in doing that cause the fuel doesnt adamise as well.

Yes, why ??

If you go to an adjustable fuel pressure regulator, why change the injectors?
Just turn the pressure up on the stock injectors.
Not only will they flow more, but you end up getting a better spray pattern out of them.

That is if you actually need more fuel, and that is doubtful......
cuel
12-17-2007, 06:46 PM
If you need injectors, I have a set out of my 87 n/a parts car. Drop me a pm if you want them.
Nalleywhacker
12-17-2007, 09:48 PM
Yes, why ??

If you go to an adjustable fuel pressure regulator, why change the injectors?
Just turn the pressure up on the stock injectors.
Not only will they flow more, but you end up getting a better spray pattern out of them.

That is if you actually need more fuel, and that is doubtful......


you are correct. it is pointless to put the 440's in a stock na i was just stating if he did he would have to get a fpr.