EFI vs. a Carb: Which makes more Horsepower?

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

\Now let me tell you what REALLY makes efi better at the salt, or any other race venue. If you do your home work before you leave for the "Great White Dyno" you're done! Altitude compensation is a wonderful tuning tool ;). If you want to try other things like more or less timing, add fuel, or ??? go ahead, but the basic package should be dialed in at home (on the dyno) and anything else you do is because you want to. You'll find out soon enough that your not going to "find" 10 mph in the tune up unless you forgot to do your homework.

Good point...and one that seemingly needs to be shared with other efi racers...because I see a LOT of laptops out there with guys "finding the tune."

[Dynoroom]

Re: EFI vs. a Carb: Which makes more Horsepower?

Good point...and one that seemingly needs to be shared with other efi racers...because I see a LOT of laptops out there with guys "finding the tune."
[/quote]

Yep, kinda like drivers who walk around in their suit & nomex to "look the part"

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

I used to love it when J.O. journalists would show up at press days in their driving suits.

[Saltfever]

Re: EFI vs. a Carb: Which makes more Horsepower?

It seems that the carb has an edge because of "wet flow dynamics". I have always thought the EFI injector was too close to the intake valve to allow for a proper liquid-to-gas phase change. (not for street but high HP application). If the injector was backed further up the intake port path (allowing more time for atomization) do you think it would make more HP? Didn't Kinsler mechanical FI do that and claim more HP than a Hilborn? Or was there some other claim?

[Dynoroom]

Re: EFI vs. a Carb: Which makes more Horsepower?

J.O.??

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

Saltfever...you mean like in F1?

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

J.O.??

"jagoff," to tribute the Grayism.

[Dynoroom]

Re: EFI vs. a Carb: Which makes more Horsepower?

It seems that the carb has an edge because of "wet flow dynamics". I have always thought the EFI injector was too close to the intake valve to allow for a proper liquid-to-gas phase change. (not for street but high HP application). If the injector was backed further up the intake port path (allowing more time for atomization) do you think it would make more HP? Didn't Kinsler mechanical FI do that and claim more HP than a Hilborn? Or was there some other claim?

You're a smart fella Fever, you'll get this yet... just remember we're talk'in gasoline here, but seems to me them Honda IRL engines have the injectors waaayy up the port too.... hummm

[Dynoroom]

Re: EFI vs. a Carb: Which makes more Horsepower?

J.O.??

"jagoff," to tribute the Grayism.

Ohh. I loved it when Gray would say that...

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

You're a smart fella Fever, you'll get this yet... just remember we're talk'in gasoline here, but seems to me them Honda IRL engines have the injectors waaayy up the port too.... hummm

Does alchohol pretty much disappear if the injector is too high?

And, pardon my ignorance, but what fuel do they run in IRL? Methanol?

[Dynoroom]

Re: EFI vs. a Carb: Which makes more Horsepower?

You're a smart fella Fever, you'll get this yet... just remember we're talk'in gasoline here, but seems to me them Honda IRL engines have the injectors waaayy up the port too.... hummm

Does alchohol pretty much disappear if the injector is too high?

And, pardon my ignorance, but what fuel do they run in IRL? Methanol?

Ethanol

[biginch]

Re: EFI vs. a Carb: Which makes more Horsepower?

distance from the valve to the injector is a time dependent variable. the higher the expected air flow speed the farther from the valve the injector needs to be.

oh, i agree, in peak terms, a carb will usually win out, efi is nicer to drive, and if you are colorblind, you can still tune......

[Freiburger]

Re: EFI vs. a Carb: Which makes more Horsepower?

Wouldn't methanol make more power? Why ethanol?

[biginch]

Re: EFI vs. a Carb: Which makes more Horsepower?

politics

[Saltfever]

Re: EFI vs. a Carb: Which makes more Horsepower?

Wouldn't methanol make more power? Why ethanol?

Hmm, ethanol comes from corn. The corn belt is where? The IRL is headquartered where? ;D