1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections
View Poll Results: so which do you prefer?
carb
31
47.69%
computer mumbo jumbo
30
46.15%
no preference
4
6.15%
Voters: 65. You may not vote on this poll

do you prefer carbed or fuel injected?

Old Jul 26, 2004 | 02:52 PM
  #26  
Feds's Avatar
More Mazdas than Sense
Tenured Member 05 Years
 
Joined: Aug 2003
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From: Sunny Downtown Fenwick
However, I DO want to put my Haltech on soon, in order to fine tune, and run different boost levels without having to rejet or run rich/lean, plus the better fuel economy.
That's what I'm saying.

A carburettor is more of a compromise than an FI system.

An FI system will give you perfect fueling more often than a carb.

An FI system is equivalent to running several different carbs, including one that adjusts itself constantly.

Properly tuned vs. Properly tuned, the torque curve of an FI motor will be above the torque curve of a carb except possibly at max power +/- 500 rpm, leading to faster acceleration throughout the range save for the 500 or 750 rpm around the power peak that the carb delivers more power. (I know that +/- 500 rpm > 500 and 750, but you get the idea)

A carb will often give more max power than an efi system, but the efi system will produce more torque and power at other parts of the RPM range.

That is my 5 different ways of saying the same thing. Pick the one you like.

I am not a rice tuner. I started building my Chevelle when I was 8. Between the chevelle and the RX, I had a Pontiac Phoenix ('76) and a '77 T-bird, and a mixer-style propane pickup truck. Those were the interesting ones. The Z-24 hatchback and the 323 and the '84 Cadi, and the '86 Prelude were not so interesting. Oh, and I have worked for pro mod drag teams as well as designing, building, installing, and tuning FI systems for the odd OEM.

Carbs definitely have their place, and I apreciate what Sterling and Carl are doing for the 12a folks. Unless it was a turbo 12a, the cost/benefit of designing and installing an EFI system vs. getting a Sterling carb would be slim. And believe you me that I still get a little sweaty looking at 3 deuces on a flatty, or two fours on a 6-71, but given my druthers, I'll take a Hilborn converted to electric control.

You neglected the part of my statement where I said:

a proper carb will deliver as much or more peak power as an FI system
Which, as far as I'm concerned, implies that a proper carb will deliver MORE peak power than an FI system. However, WAY back in the day, when Holley's TBI system hit the street, HOT ROD (or PHR) did a Holley carb vs. Holley TBI comparison using the same engine (block, heads, exhaust, cam) in the same car. The carb made something like 3 or 5 more HP at peak, but the TBI got the car down the track 2 or 3 tenths quicker. AND gave beter economy, AND started better, AND idled better, AND drove around town better. Can you feel 2 or 3 tenths? No. Will it win you races? Yes. Is almost any aftermarket/2nd gen conversion better than the first iteration of Holley's TBI? Yes.

Carbs are cake. FI is cake you can eat.

How's that for a novel?
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Old Jul 26, 2004 | 04:33 PM
  #27  
Rotortuner's Avatar
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Tenured Member 20 Years
 
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From: Ohio
for NA cars that are street cars, road race, or weekend drag cars and dont have to auto cross, i vote carb, but for cars that are boosted or have to autocross then it better be fuel injection for tuneability and reliability.
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Old Jul 26, 2004 | 06:55 PM
  #28  
Brianhsval's Avatar
I'm old but not slow
Tenured Member 10 Years
 
Joined: Jan 2004
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From: Huntsville,Al
Please explain the difference between autoX and road racing. I know what both are, but fail to see the need for a carb in one and not the other. Tuneability and reliability would be needed for ALL racing would it not?
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