Best, most economic daily driver injectors????

[Squid4life]

For those of you who have had multiple injector setups, I was wondering in your experience what is the most economical injector?

I picked up a mostly stock 87 T that I will be driving every day. Not too concerned about max performance (yet, of course...) but more concerned about economy. I will keep it at 15 psi. Car has stock heads, cam intake, TB etc. Has a dutt neck IC, and slightly larger injectors now, with a custom chip. I have not even driven it enough to see what the mileage is, but curious what others experience is with best economy injectors. I would say my driving is 75% city/merge on/merge off driving which is not conducive to best gas mileage, but what do you guys think?

My other car has 60's and does ok. But, with regards to driveability and economy, is it 100% true that "as long as you have a chip burned for them, they are all the same"? Doubtful. If hi-Z 80's got the same economy as stockers or 43's, I would be impressed.

Input? Just kind of thinking out loud here, as this question has been in my mind as I go from "quick street car" to "clean driver car".

 

[GNRick]

When new they were rated at 17/24. I know some guys say they get gazillion mpg in "lean cruise mode". I would guess the closer to stock, the higher the mpg.

 

[deezdad]

Cant say from experience but from EVERYTHING i've read it would be the 42.5 lb bosch lime top ford lightning injectors.

 

[Hotrodbuick]

I can't say from experience but with my car having the ta49 and 60lb injectors its getting about 17 around town driving if I keep my foot out of it. But I would think more than just injectors effect mpg; turbo, cam, and converter have to be all working together.

 

[Squid4life]

True, but for the guys who may have stayed mostly stock or didn't change much else other than injectors, I was curious if they had a "favorite" for economy. I would have assumed stock or slightly larger, but you never know. Chips have come a long way since I bought my first turbo Buick, that is for sure. Wonder if Eric or Bob can burn an e85 chip for near stock injectors? I know Eric said my 60's were about maxed out, but that was for ~25 psi. Wonder if you could run e85, with stock or near stock injectors, at only 15ish psi. Of course, that is totally not using the e85 for its max potential, but I have a station about 2 miles from my house and e85 is damn cheap. I lost a few mph, but beat on the other car with 60's. Wonder if easy 15 psi max daily driving on e85 would yield much better results with this car, mostly stock, with small injectors...

 

[Squid4life]

The new car has a tighter converter too, so that should help my mph, considering all the merge on/merge off/ sit and wait traffic I see each day.

 

[Hotrodbuick]

E85 should decrease mpgs as it will take almost twice as much alcohol for every gallon of regular gas. Since e85 is close to alcohol it should take more of it than regular gas as my understanding of e85. I know in my other car the 10% ethanol in our gas has dropped my mpgs by about 5, I have a place that sells regular gas with no ethanol although it costs more I get better mpgs so it's worth it to me.

 

[bison]

I've got over 20mpg with mine. 85lb/hr. The injector flow rate doesn't effect the fuel mileage. Driver technique and engine setup do more than anything

 

[750H.P.V6]

If you're running closed loop with the same A/F ratio then the economy should be the same.

Neal

 

[TurboTnZ06]

I run 80# inj with TT 6.0 and pump 93/alky and around town (45mph speed limit in town) I get 15-ish.

I ran 60's on a stock basic recipe GN (exhaust, pump, TT, chip, stock airbox 13.0/104 on pump 93 only) and got 20+ mpg highway lots of times, even 22mpg at 80+ mph on 28 inch DR's from FL to GA for racing in Reynolds.

 

[davelostmissing]

I get 23/24 mpg highway with stock injectors and stock chip. I don't hear many saying they get that with other combos.

 

[Phoff]

Biggest factors in fuel economy with Turbo Regals that I have owned.

Tires were by far the biggest ingredient in fuel milage.

Computer Chip

Torque Converter

Injectors had no affect unless they were over 60lbs hr.

Pete

 

[Red C5]

I've never noticed an increase or decrease in fuel economy just from an injector change. I would think that the tuning is what controls the amount of fuel being sprayed, not the injector itself.

 

[Pronto]

At 15lbs boost and on 93 octane, Ford blue top 36s work fine. I ran them for several years to mid 12s with a TT chip.

 

[Chuck Leeper]

The good old stock injs are hard to beat. I've flow tested/cleaned many sets w >100K on them... Just like my Timex watch.

 

[Rafs-T-Type]

Tires were by far the biggest ingredient in fuel milage.


Pete

Are you saying taller tires netted you better MPG? Or heavier tires made it worse? What are you saying?

 

[Phoff]

Are you saying taller tires netted you better MPG? Or heavier tires made it worse? What are you saying?

Wider tires. Going from 215mm to 255mm knocked off 3mpg from my average.

Pete

 

[Phoff]

The good old stock injs are hard to beat. I've flow tested/cleaned many sets w >100K on them... Just like my Timex watch.

I agree.

Pete

 

[Rafs-T-Type]

Wider tires. Going from 215mm to 255mm knocked off 3mpg from my average.

Pete

Why would wider make it worse? Increased friction? Or a combination with increased rotational mass? - Thanks

 

[Phoff]

Mostly friction.

Pete