anyone locally done this
is it worth it
i tried searching the board but theres so many different opinons
i dont know what to think
i wanna hear some honest opinons from u local guys
thanx

 

I have not done it, I'm sure it'll work as there is an LT4 carb intake for LT1's, but I think its a waste, plus you will not be able to go as big with a cam as you would with FI, I just think its kinda pointless but hey.

 

i just want a lot of power similar to ur numbers
but still make aircare

 

Matt- why do you think that a large cam won't work with a carb but will with EFI?

 

if you think you can make the same hp and have better emisions with a carb .. you got a LOT of learnin to do

mike: precision tuning and driveability

 

Uhm, you want to explain that one to me

You think you cant run a big cam in a carburated engine?

I'm swithching to a carb on my 396 project and I can assure you I'll be running a BIG solid roller.

 

yet anyone with an FI car could do the same and more and STILL pass aircare

 

WOT and idle carbs(when properly tuned) and EFI are the same
At part throtle EFI will walk all over carbs.

 

Give me a break. 95% of the guys on this site dont give a sh** about emissions and quite frankly, I'm one of them.

Whether or not a particular F.I. car pollutes a bit less then a simalar motor with a carb is irrelavent. At an emissions test, you either pass or you fail. Period. For example, a stroked 396 with fully ported AFR 210's and a solid roller, you're not gonna pass emissions with or without fuel injection.

Why do so many people get ticked off when someone wants to try using a carburator instead of fuel injection? Everybody gets all defensive and starts putting down carbs and how aweful they are and how wonderful f.I. is .

Probably 99% of all the racing series' out right now from NHRA, Nascar, Trans AM Series etc. etc. etc. - all these car's are carburated and as you can see, the performance of the cars in these sports are pretty dam good.


Ps.

Just for the record, before I blew my motor, I 'd lost 9 street races in 5 years. Of those 9 cars that beat me, 8 of them were carburated Carb's can't be all that bad

 

doesnt matter or not if you dont give a **** about emmisions, the author of this thread does.

 

I realize there are lots of tuning and driveability advantages with EFI but that was not the way I read Matt's post. To me he sounded like he was saying that you can't run as big a cam with a carb as you can with EFI period which didn't mean emissions were a concern. As for really big cams in general...EFI won't help you much once you go past a certain point. For an all out drag racer a carb is a very good choice as 93 formy has also stated and he is right on.

I'm going to run a carb on my new project for the first while but will switch to EFI later due to the initial break in and cost. I'll dyno with the carb and with EFI and see what the difference is from part throttle to WOT. I'm betting WOT will be just as good which is all I care to run the 1/4.

94 Blue - if you want to have a dying chance of power like Bunkers and still pass emissions, stay with the EFI and get a bottle or maybe an LS1

 

carburators are freakin useless .. the only people who go back to carb are ones who cant figure out how to tune FI or people with useless 93s that are harder to tune than a carb ..

which one do you prefer ? sittin on your seat with a laptop or burning ur hands on the hot manifold taking the carb apart to change the jets and adjust float bowls over and over and over ?

 

Quick change float bowls. Never have to remove a float bowl to change a jet again Still have to deal with dripping fuel though

 

Hmm.. interesting, I never said you cant run a big cam, just that you can run bigger with FI, few pointers:


variable timing (EFI you can throw a ton at idle while maintaining good timing where the cam is a bog and limiting at its power range)

fuel (you can take out fuel at idle not to flood the engine while still giving a good fuel mixture mid range and top end, so fine to every bit of map/rpm variable)

big cams promote reversion back into the intake, fuel injectors sit closer to the valve making fuel delivery much more preceise, not dumping fuel, cams already suffer from reversion so the more exact the fueling the less reversion will affect low/mid RPM performance (also emissions)

big cams offer low vacume at idle, fuel needs atomizing, in a carb, this is done at the venturi, so less vacume = more raw fuel which does not ignite very well at all, fuel injection does not need vacume to atomize the fuel mixture and give that cylinder just what it needs as the atomizing is done in the injector with high pressure at it's side.

decel you can shut the fuel off to prevent over fueling with injections (computer)

the list goes on and I'm tired just came from work.

PS. Sure you will see many Carbed cars that have big cams, notice how most are solid roller? Yeah, thats cuz a solid roller of that is much easier to make run, thus why you can go with a bigger selection with solid roller (clearance at the valve takes care of most duration LOL), how many carbed cars do you see with big hydraulic roller cams that drive around every day and still get a ton of milage? Or just big hydraulics in general with low cubes on the block, yeah they need more displacement to create more vacume and make that big cam seem small.

etc...

 

hey whats this about crappy 93s!!! you can tune on real time with tunercat, unlike your lt1 edit:P


basically 94 blue, you dont want to go to carb unless your building a drag car, retro fitting a lt1 into a carb equipped vehicle, breaking in the motor on a dyno.