305 Worth It????
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Engine: 302 5.0
305 Worth It????
I currently have a 91 RS with a 3.1L v6 but I know a person selling a 91 RS with a 305 v8... Carburated I believe.... They owner says there is some thing wrong with the fuel pump I am wanting to drop it into mine, and ditch the bod... So is the 305 worth it, or should I hold off to a 350... How would I know if it's TBI or TPI... which is better TBI or TPI??? My friend told me you can bore 305's to a 348.... would that be worth it...
I am just happy it will be a v8:lala: :lala:
I am just happy it will be a v8:lala: :lala:
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Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
A carbed motor will look like the image below. TBI will have 2 barrels and an injector (roundish with 2 wires coming out the top) centered over the 2 barrels. You'll have to remove the aircleaner to see which one it is.
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Re: 305 Worth It????
Originally posted by trickedout02
My friend told me you can bore 305's to a 348....
My friend told me you can bore 305's to a 348....
Whether it's "worth it" is up to you. It's a lot of work, but having a complete donor car is the only sane way to approach it.
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Engine: 302 5.0
it's the whole car I am buying the 91 camaro has a 305 in it... it's a RS. I was reading that a stock 91 camaro rs 305 TBI has only 220 horses?? is this true?? How many horses are you 305's kickin???
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by trickedout02
it's the whole car I am buying the 91 camaro has a 305 in it... it's a RS. I was reading that a stock 91 camaro rs 305 TBI has only 220 horses?? is this true?? How many horses are you 305's kickin???
it's the whole car I am buying the 91 camaro has a 305 in it... it's a RS. I was reading that a stock 91 camaro rs 305 TBI has only 220 horses?? is this true?? How many horses are you 305's kickin???
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Engine: 302 5.0
Yeah I'll do that... thnx, for all the info... is the tranny that the 305 has in it along with the TBI and all the accessories can be hooked straight up to a 350???
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Car: '90 RS
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Transmission: Magnum T56
Originally posted by trickedout02
Yeah I'll do that... thnx, for all the info... is the tranny that the 305 has in it along with the TBI and all the accessories can be hooked straight up to a 350???
Yeah I'll do that... thnx, for all the info... is the tranny that the 305 has in it along with the TBI and all the accessories can be hooked straight up to a 350???
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Car: 1991 Camaro RS
I have a 91 RS 305 TBI car and a 89 RS 2.8.
The 305 will seem like a big block compared to your 2.8. This will wear off as you realise you car isn't really that fast. Do what everyone is telling you and buy the 91 305, use it as a project car while you are driving your v6.
If you don't do this you will be out of a car, and *** forbid that you run into a problem. There will be issues you haven't addressed too.
Issues off the top of my head...
1. Your 3.1L has a high pressure fuel pump, it is too much for the TBI and not enough for TPI. You will have to drop the tank to replace it.
2. Your tach will be off as its calibarted for a V6.
3. Wiring is gonna have to be swapped over and grafted together. This is going to be hard.
Do a search. Read everything you can about the V6 to V8 swaps and the three forms of induction.
The 305 will seem like a big block compared to your 2.8. This will wear off as you realise you car isn't really that fast. Do what everyone is telling you and buy the 91 305, use it as a project car while you are driving your v6.
If you don't do this you will be out of a car, and *** forbid that you run into a problem. There will be issues you haven't addressed too.
Issues off the top of my head...
1. Your 3.1L has a high pressure fuel pump, it is too much for the TBI and not enough for TPI. You will have to drop the tank to replace it.
2. Your tach will be off as its calibarted for a V6.
3. Wiring is gonna have to be swapped over and grafted together. This is going to be hard.
Do a search. Read everything you can about the V6 to V8 swaps and the three forms of induction.
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by dennis6
1. Your 3.1L has a high pressure fuel pump, it is too much for the TBI and not enough for TPI. You will have to drop the tank to replace it.
1. Your 3.1L has a high pressure fuel pump, it is too much for the TBI and not enough for TPI. You will have to drop the tank to replace it.
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Engine: 302 5.0
yeah, I my friend was telling my before I buy this car, was to take a gallon of gas with me to the car, take off the tbi, and pure some gas down into the injector, while someone trys to crank it up, if it cranks then you know the problems lyes somewhere in the fuel lines to the fuel pump, if you hear a clicking sound when you turn the key over, from near the tank is, then the pump is working, and it must be a line....
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Car: 1991 Camaro RS
Originally posted by ShiftyCapone
Any fuel pump will work with a TBI. Pressure wise that is assuming that you want anything that peforms more than the stocker. The fuel pressure regulator will control the amount that is recieved by the injectors. More is better because the stock TBI pump is so weak. It will really come in handy when you need a pump to supply a constant 15psi+ of pressure at 5,000 rpm. That would be with a heads and cammed Lo3.
Any fuel pump will work with a TBI. Pressure wise that is assuming that you want anything that peforms more than the stocker. The fuel pressure regulator will control the amount that is recieved by the injectors. More is better because the stock TBI pump is so weak. It will really come in handy when you need a pump to supply a constant 15psi+ of pressure at 5,000 rpm. That would be with a heads and cammed Lo3.
Secondly, the people that have tpi that have went carb will tell you the regulator causes fluctuations in the fuel pressure. A regular regulator will burn up the fuel pump.
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Car: '90 RS
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Originally posted by dennis6
Not true. First you need an expensive return style regulator.
Secondly, the people that have tpi that have went carb will tell you the regulator causes fluctuations in the fuel pressure. A regular regulator will burn up the fuel pump.
Not true. First you need an expensive return style regulator.
Secondly, the people that have tpi that have went carb will tell you the regulator causes fluctuations in the fuel pressure. A regular regulator will burn up the fuel pump.
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Car: 86 Camaro
Engine: L98 350 bore .060 out, Carb power
Transmission: slusher 700 beatbox
honestly, dont waste time with a TBI. if you want FI go TPI. i said to hell with FI all togeather and threw a carb on. you can tear out all your wiring with a carb and clean up the engine bay. i think its easier to make power with a carb, just have to tune it every now and again. i think FI is better for the daily driver though, it will start pretty much every time you want it to without busting out the screw driver to adjust the carb or playing with your choke
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Car: 1986 Pontiac Firebird
Engine: 1991 305 TBI
Transmission: Th700-R4
There is NOTHING wrong with TBI. Not only is it very versatile, but it is easier to work on than TPI's and Carbs. Nor is there anything wrong with the 305's. With the right knowledge you can get tons of power out of them. Most anything that will work with teh 350's will work with teh 305 since they are damned near the same.
If you want more power, start off with a holley 1000cfm and an Edelbrock FI-compatable intake manifold. Since FI's are computer controlled, you can make adjustments on a laptop. Unlike a carb, where there's lost of fine tuning, the FI's will do it for you.
Take a look here for TONS of **** you can do with the 305TBIs. They're not bad engines at all.
If you want more power, start off with a holley 1000cfm and an Edelbrock FI-compatable intake manifold. Since FI's are computer controlled, you can make adjustments on a laptop. Unlike a carb, where there's lost of fine tuning, the FI's will do it for you.
Take a look here for TONS of **** you can do with the 305TBIs. They're not bad engines at all.
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Car: 86 Camaro
Engine: L98 350 bore .060 out, Carb power
Transmission: slusher 700 beatbox
never said they were bad, just not as good. ive heard it all when it comes to 305 v 350. if your gonna spend money get the 350. more power. can argue up and down all youd like but the 350s make more power then the 305s, no problem. as far as the tbi to carb, id rather a carb ANYDAY man. all the big boy cars at the track are carbed, well most are.
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2 barrel TBI is like a 2 barrel carb, almost worthless with a very few exceptions. The cost of making either one competent is outrageous. TBI is decent when you have a 4 barrel unit.
The 305 vs 350 argument is similar. There is something wrong with a 305 and its not the displacement. Its the valve shrouding. You have to use small valves and can't put larger ones in because of the cylinder bore.
As said earlier anything done to a 350 can be done to a 305, but don't expect near the return for your investment. A pair of modified Vortec heads and a comp XE 268 cam will yield 400 hp on a 350. Try that with a 305.
The 305 vs 350 argument is similar. There is something wrong with a 305 and its not the displacement. Its the valve shrouding. You have to use small valves and can't put larger ones in because of the cylinder bore.
As said earlier anything done to a 350 can be done to a 305, but don't expect near the return for your investment. A pair of modified Vortec heads and a comp XE 268 cam will yield 400 hp on a 350. Try that with a 305.
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Car: 1988 IROC CONVERTIBLE
Engine: 305 TPI PAXTON SUPERCHARGER & NOS
Transmission: T5
Originally posted by dennis6
2 barrel TBI is like a 2 barrel carb, almost worthless with a very few exceptions. The cost of making either one competent is outrageous. TBI is decent when you have a 4 barrel unit.
The 305 vs 350 argument is similar. There is something wrong with a 305 and its not the displacement. Its the valve shrouding. You have to use small valves and can't put larger ones in because of the cylinder bore.
As said earlier anything done to a 350 can be done to a 305, but don't expect near the return for your investment. A pair of modified Vortec heads and a comp XE 268 cam will yield 400 hp on a 350. Try that with a 305.
2 barrel TBI is like a 2 barrel carb, almost worthless with a very few exceptions. The cost of making either one competent is outrageous. TBI is decent when you have a 4 barrel unit.
The 305 vs 350 argument is similar. There is something wrong with a 305 and its not the displacement. Its the valve shrouding. You have to use small valves and can't put larger ones in because of the cylinder bore.
As said earlier anything done to a 350 can be done to a 305, but don't expect near the return for your investment. A pair of modified Vortec heads and a comp XE 268 cam will yield 400 hp on a 350. Try that with a 305.
I am planning on replacing my 305 TPI with a 350 while still retaining the Tune Port Injection. What motor should I get considering being on budget. I guess I want to get the biggest bang for the buck. Also could you list a few places where I can purchase the motor and items I should replace such as the cam, heads etc.. to get optimum horsepower.
Thanks
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Originally posted by jovial86
There is NOTHING wrong with TBI. Not only is it very versatile, but it is easier to work on than TPI's and Carbs. Nor is there anything wrong with the 305's. With the right knowledge you can get tons of power out of them. Most anything that will work with teh 350's will work with teh 305 since they are damned near the same.
If you want more power, start off with a holley 1000cfm and an Edelbrock FI-compatable intake manifold. Since FI's are computer controlled, you can make adjustments on a laptop. Unlike a carb, where there's lost of fine tuning, the FI's will do it for you.
Take a look here for TONS of **** you can do with the 305TBIs. They're not bad engines at all.
There is NOTHING wrong with TBI. Not only is it very versatile, but it is easier to work on than TPI's and Carbs. Nor is there anything wrong with the 305's. With the right knowledge you can get tons of power out of them. Most anything that will work with teh 350's will work with teh 305 since they are damned near the same.
If you want more power, start off with a holley 1000cfm and an Edelbrock FI-compatable intake manifold. Since FI's are computer controlled, you can make adjustments on a laptop. Unlike a carb, where there's lost of fine tuning, the FI's will do it for you.
Take a look here for TONS of **** you can do with the 305TBIs. They're not bad engines at all.
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Car: 1991 Camaro RS
Originally posted by IrocZonNos
Dennis,
I am planning on replacing my 305 TPI with a 350 while still retaining the Tune Port Injection. What motor should I get considering being on budget. I guess I want to get the biggest bang for the buck. Also could you list a few places where I can purchase the motor and items I should replace such as the cam, heads etc.. to get optimum horsepower.
Thanks
Dennis,
I am planning on replacing my 305 TPI with a 350 while still retaining the Tune Port Injection. What motor should I get considering being on budget. I guess I want to get the biggest bang for the buck. Also could you list a few places where I can purchase the motor and items I should replace such as the cam, heads etc.. to get optimum horsepower.
Thanks
L98 Shortblock $1136 dollars form SDPC
Heads you have a few choices
Upgraded Roller Vortec
or Pro Topline heads from Shaver Racing Heads .
Cam:
Ideal is an LT4 Hot Cam.
Seriously think about ditching the stock TPI for a Stealth Ram. You can buy just the intake and fuel rails for about $400 from Jegs or Summit.
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For right around 2000 dollars you should have about 400 hp with this setup. The stock TPI will kill some of it, that is why I stated you should get the stealhram base and fuel rails.
1.6 Roller rockers should put you at or over 400 hp.
1.6 Roller rockers should put you at or over 400 hp.
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