10k in pocket. New block or EFI ?

[Cobrabill]

I don't have to witness a Chevy running of a cliff to know what happens at the bottom.Injection is injection.I don't care who's it is.Peak HP is determined by how efficient a air pump the engine is.Fuel delivery system is ALMOST irrelevant.

If that FI system picked 100 HP over a Webber set-up,then either the Webbers are a lot worse than i thought or the tuner should be fired.

It's great that you are making the numbers you are and that you are happy with it.But to say that FI is superior in every aspect is false.And in the bang for the buck catagory,it's way down the page.But if you(or anyone else) want to do it-knock yourself out.

[FUNFER2]

Clois- I was very happy that Dean took some time out and called me. We had a conversation about this EFI and I'm sold on them. Sounds like a great system. It's very expensive though.

[Great Asp]

Originally Posted by Cobrabill

I don't have to witness a Chevy running of a cliff to know what happens at the bottom.Injection is injection.I don't care who's it is.Peak HP is determined by how efficient a air pump the engine is.Fuel delivery system is ALMOST irrelevant.

If that FI system picked 100 HP over a Webber set-up,then either the Webbers are a lot worse than i thought or the tuner should be fired.

It's great that you are making the numbers you are and that you are happy with it.But to say that FI is superior in every aspect is false.And in the bang for the buck catagory,it's way down the page.But if you(or anyone else) want to do it-knock yourself out.

"I don't have to witness a Chevy running of a cliff to know what happens at the bottom." Do you know what a T-bone looks like?

"But to say that FI is superior in every aspect is false" When someone says that let me know.

"And in the bang for the buck catagory,it's way down the page.But if you(or anyone else) want to do it-knock yourself out." Gee thanks. I guess a Volkswagon would have been more practical. I'll have to re-think this whole Cobra thing

E

[FUNFER2]

I agree. With EFI supporting the cfm and other parameters, with the computer adjusting on the fly, how can a carb. do the same ?

[Cobrabill]

Originally Posted by FUNFER2

I agree. With EFI supporting the cfm and other parameters, with the computer adjusting on the fly, how can a carb. do the same ?

Keven,does that computer change how much air will fit thru the throttle blades,intake runner or past the valve?

[Cobrabill]

[quote=Great Asp1) Do you know what a T-bone looks like?

2)When someone says that let me know.

3)Gee thanks. I guess a Volkswagon would have been more practical. I'll have to re-think this whole Cobra thing E[/QUOTE]

1)Sure.Another non-sequitur would be nice
2)You did.But not in so many words.
3)Don't get all worked up fer christ sakes.If WE were the pratical type,this board would be a ghost town.And the last time i looked,the FI/carb debate wasn't Cobra specific.


My whole point is that for people chasing the almighty HP,FI isn't the answer.

[Great Asp]

Bill,

1) Do you know what a T-bone looks like? "Sure.Another non-sequitur would be nice" Do I have to tell you how to look?

2)When someone says that let me know. "You did.But not in so many words." Thanks clearing that up, you are right, I'm sure

3)Gee thanks. I guess a Volkswagon would have been more practical. I'll have to re-think this whole Cobra thing E "Don't get all worked up fer christ sakes.If WE were the pratical type,this board would be a ghost town.And the last time i looked,the FI/carb debate wasn't Cobra specific." I didn't think it was a big leap to the statement I made based on your comments.

E

[olddog]

Originally Posted by Cobrabill

Injection is injection.I don't care who's it is.Peak HP is determined by how efficient a air pump the engine is.Fuel delivery system is ALMOST irrelevant.

You can flow a bunch more air down a pipe, at a given delta pressure, than you can air with 8% gasoline mixed with it. Fuel laden air does not flow well in a manifold. So at least in theory, an engine can pump much more air if you don't mix the fuel into the air right at the begining, like a carb or throttle body injection does. Ideally the fuel would go in via direct injection into the cylinder after the intake valve was closed.

By its very nature a carb has to create a low pressure zone to suck the fuel through the jets, creating a flow restriction. EFI does not have this problem.

Now the factory EFI stuff was designed for good emissions and low end torque. On Hp it does not compete with a carb. Most of the aftermarket stuff is patterned off the factory systems and still trying to meet emissions. It would not surprise me at all if an aftermarket EFI system, that was design from the ground up to make power and not care about emissions, made more power than a carb.

[stuartb]

For me it was an easy choice, EFI was the way to go with a change in altitude of about 5000 ft. on my normal drives.

[Cobrabill]

Originally Posted by stuartb

For me it was an easy choice, EFI was the way to go with a change in altitude of about 5000 ft. on my normal drives.

I was going to mention "your" situation but i thought it would be a digression of sorts.But that is one advantage of the "correct" FI system.

[Cobrabill]

Originally Posted by olddog

1)You can flow a bunch more air down a pipe, at a given delta pressure, than you can air with 8% gasoline mixed with it. Fuel laden air does not flow well in a manifold. So at least in theory, an engine can pump much more air if you don't mix the fuel into the air right at the begining, like a carb or throttle body injection does. Ideally the fuel would go in via direct injection into the cylinder after the intake valve was closed.

2)By its very nature a carb has to create a low pressure zone to suck the fuel through the jets, creating a flow restriction. EFI does not have this problem.

3)Now the factory EFI stuff was designed for good emissions and low end torque. 4)On Hp it does not compete with a carb. 5)Most of the aftermarket stuff is patterned off the factory systems and still trying to meet emissions. 6)It would not surprise me at all if an aftermarket EFI system, that was design from the ground up to make power and not care about emissions, made more power than a carb.

1)That's why manifold designs(wet vs dry) are different.The amount of air an engine can pump IRRELEVANT to the fuel system.
2)And yet,it(the carb) still makes as much(or more) HP as FI.Go figure
3)Factory EFI was designed for emissions-PERIOD.
4)Yes-it does.Look at all the Viper,Vettes & such.But we aren't talking about factory-are we?
5)False
6)Too ridiculous to respond to.