tbi or carb
#1
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Car: 91 rs
Engine: 350
Transmission: 700r4
Axle/Gears: 4.10
tbi or carb
i have a 91 rs with 350 tbi and 700r4 and i was wandering wich would be better tbi or carb. my only problem is im trying to get more horespower and i already have a carb (holly 750 doublepumper but no intake) or should instead of getting an intake for the carb buy a hop up throttle body and an intake should i splurge for the throttle boby or the carb
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Car: 1999 Pontiac T/A Firehawk
Engine: ***'s Engine
Transmission: T56
I don't know. I'd run whichever you prefer. But you'll be spending more money than you think on the TBI setup, because the factory TBI unit probably won't get you where you want to go.
Me, I prefer carb, because I can't stand dealing with balky ECMs. But that's personal opinion.
Me, I prefer carb, because I can't stand dealing with balky ECMs. But that's personal opinion.
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Car: 91 Camaro TBI 5.0
Transmission: Auto
I aswell would go carb, much easier to obtain HP than a tbi, tbi just didn't make very much sense to me. However, changing over to carb may serve just as much as a headache as getting HP out of your tbi. Depending on how much power you're looking for, you could always install a spacer between your tbi and manifold, install a rougher cam and reprogram the ecm to get atleast above 250 hp. You're main lose is having a 305 Ci block. I wouldn't expect more from it. Going carb will grant more options in achieving hp, however the clean up of all the ecm wiring and redirecting of the vacuum and emmisions control isn't worth it.
#5
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Originally Posted by camarodrew
i have a 91 rs with 350 tbi and 700r4 and i was wandering wich would be better tbi or carb. my only problem is im trying to get more horespower and i already have a carb (holly 750 doublepumper but no intake) or should instead of getting an intake for the carb...
#6
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Engine: sbc 350
several opinions so far, all for carb,
what is wromg with tbi...
....tbi situation....
for up to 300 HP,
possibly with a new intake manifold, bigger TBs?.
probably needing a new prom.
............
but with that stuff, you
get the advantages of fuel injection
I don't see problems for tbi until you
start having issues with the injectors
not flowing enough fuel
what is wromg with tbi...
....tbi situation....
for up to 300 HP,
possibly with a new intake manifold, bigger TBs?.
probably needing a new prom.
............
but with that stuff, you
get the advantages of fuel injection
I don't see problems for tbi until you
start having issues with the injectors
not flowing enough fuel
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#8
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Engine: sbc 350
'drew,
Do you have access to someone who can 'tune'?
ok, so the car -305 had tbi, and you swapped in a 350
with tbi? if yes, you should consider keeping tbi.
btw, what cam is in the 350?
Do you have access to someone who can 'tune'?
ok, so the car -305 had tbi, and you swapped in a 350
with tbi? if yes, you should consider keeping tbi.
btw, what cam is in the 350?
#9
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Car: 91 rs
Engine: 350
Transmission: 700r4
Axle/Gears: 4.10
thanks the 350 is stock but fresh and yes i do know someone that can tune but there a** holes should i deal with them or get the carb and yaeh there that bad
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Car: 2000 BMW M5
Get a carb. TBI is a step in the wrong direction. There is no real right way to make HP with a TBI other than getting the largest injectors you can, which still are not all that large compared to the lb/hr rate you can get with 8 properly sized injectors. Then you end up cranking the TBI fuel pressure up to 2 or 3 times what the factory designed and having to burn chips to try to get it to idle right.
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Originally Posted by 327_TPI_77_Maro
Get a carb. TBI is a step in the wrong direction. There is no real right way to make HP with a TBI other than getting the largest injectors you can, which still are not all that large compared to the lb/hr rate you can get with 8 properly sized injectors. Then you end up cranking the TBI fuel pressure up to 2 or 3 times what the factory designed and having to burn chips to try to get it to idle right.
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Engine: sbc 350
'drew, first of all, consider putting in a decent camshaft,
while you have the chance.
There is no substitute for a good cam.
do a search, you can find out the
issues with going to carb.
you need to think about
. the carb to tranny cable
. what to do with the distributor
.the carb needs a low pressure regulator
. probably other stuff
while you have the chance.
There is no substitute for a good cam.
do a search, you can find out the
issues with going to carb.
you need to think about
. the carb to tranny cable
. what to do with the distributor
.the carb needs a low pressure regulator
. probably other stuff
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Car: 1987 TA
Engine: 350 stock/twecked
Transmission: 700r4
dito
i would do this you will really like it
latger
rick
I beg to differ, GM ran 32 PSI fuel pressure on the last 454 TBI trucks with two small 45 lb/hr injectors. At 32 PSI they were equivalent to 73 lb/hr each. I have run 45/55/61/and 68 lb/hr injectors at 32-35 PSI with no problems. Chip tuning is not that hard to learn. I have pulled 301 RWHP @ 6,500 out of a TBI 305 with 61 lb/hr injectors and was not out of injector, I was out of engine!
latger
rick
#15
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Originally Posted by Rick King
dito
i would do this you will really like it
latger
rick
i would do this you will really like it
latger
rick
YouTube - 350 TBI
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