How can I get alot of horsepower out of a 305?
12-01-2004, 02:52 PM
#51
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And like I said it is not pointless to build a 305 depending on what you have to start with and what your end goal is.
I sure hope there is enough people out there doing their own research on building motors and not relying on what is posted on line as the end all of what to do
I sure hope there is enough people out there doing their own research on building motors and not relying on what is posted on line as the end all of what to do
12-01-2004, 03:37 PM
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And I also hope that people won't be misled into spending some amount of money, and getting less for it.
Like I said .... HP per $$$. A 350 core is some $50 or $100; and you get 15% more HP for the same $$$ beyond that. Period.
Like I said .... HP per $$$. A 350 core is some $50 or $100; and you get 15% more HP for the same $$$ beyond that. Period.
12-01-2004, 03:47 PM
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Car: 1966 impala , 1998 sebring vert,1978 buick regal turbo, 1991 chevy silverado 3/4ton 4x4 lifted
Engine: 283, 2.5,3.8 turbo 350
Transmission: powerglide,auto overdrive, th350,4L80
Originally posted by RB83L69
And I also hope that people won't be misled into spending some amount of money, and getting less for it.
Like I said .... HP per $$$. A 350 core is some $50 or $100; and you get 15% more HP for the same $$$ beyond that. Period.
And I also hope that people won't be misled into spending some amount of money, and getting less for it.
Like I said .... HP per $$$. A 350 core is some $50 or $100; and you get 15% more HP for the same $$$ beyond that. Period.
12-01-2004, 04:20 PM
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And like I said it is not pointless to build a 305 depending on what you have to start with and what your end goal is.
Pistons arent cheaper, its not smarter, and there aint no way in hell that the 350 with the EXACT SAME components will only make 5 more HP.
12-06-2004, 01:31 PM
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Car: 88 GTA
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you should prolly save up for a 350. thats what i'm going to do, In the mean time i'm going to do pretty much full ignition/ exhaust, and maybe some other parts that can be transferred over to the 350 when i can afford an engine swap.
12-13-2004, 06:06 AM
#56
If you want my opinion, and opinions are cheap....
I say be different, if you want a 5.0L engine, do it. When fate came around and ruined my TPI 305 in a flood, i rebuilt my engine to keep the virgin block still in the car ( i wanted it original). I noticed you put 86 in your name, so if you have an 86 like i do, i recommend changing the cam for at least the L69/LB9 cam that came in the 1985 cars. In 1986 they used the wimpy LG4 cam on the TPI and killed the horsepower. The first thing i did when i had the engine rebuilt is i bought that camshaft, and believe me its worth the $50 i paid at carquest. The reason i picked this cam is because chevy did all the testing already and i knew it would work, and it bumped the horsepower from 190 to 215. The second thing you probably want to do, which is pretty cheap, is replace the stock rockers from 1.5 to 1.6 ratio. I plan to do this in the near future since it will boost your lift without having to get a bigger cam. I didn't know the L69 HO had bigger exhaust manifolds until just now, i guess you learn something every day! And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it. I wouldnt worry too much about what other people think about a 305, they aren't going to drive it right?
I say be different, if you want a 5.0L engine, do it. When fate came around and ruined my TPI 305 in a flood, i rebuilt my engine to keep the virgin block still in the car ( i wanted it original). I noticed you put 86 in your name, so if you have an 86 like i do, i recommend changing the cam for at least the L69/LB9 cam that came in the 1985 cars. In 1986 they used the wimpy LG4 cam on the TPI and killed the horsepower. The first thing i did when i had the engine rebuilt is i bought that camshaft, and believe me its worth the $50 i paid at carquest. The reason i picked this cam is because chevy did all the testing already and i knew it would work, and it bumped the horsepower from 190 to 215. The second thing you probably want to do, which is pretty cheap, is replace the stock rockers from 1.5 to 1.6 ratio. I plan to do this in the near future since it will boost your lift without having to get a bigger cam. I didn't know the L69 HO had bigger exhaust manifolds until just now, i guess you learn something every day! And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it. I wouldnt worry too much about what other people think about a 305, they aren't going to drive it right?
12-13-2004, 08:42 AM
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Car: 1966 impala , 1998 sebring vert,1978 buick regal turbo, 1991 chevy silverado 3/4ton 4x4 lifted
Engine: 283, 2.5,3.8 turbo 350
Transmission: powerglide,auto overdrive, th350,4L80
Originally posted by Lucid
And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it.
And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it.
Now if you would have taken a 350 and put a healthy cam in it you would be "dusting" alot more cars
There is no replacement for displacement .....period....
12-13-2004, 10:53 AM
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Originally posted by Lucid
If you want my opinion, and opinions are cheap....
I say be different, if you want a 5.0L engine, do it. When fate came around and ruined my TPI 305 in a flood, i rebuilt my engine to keep the virgin block still in the car ( i wanted it original). I noticed you put 86 in your name, so if you have an 86 like i do, i recommend changing the cam for at least the L69/LB9 cam that came in the 1985 cars. In 1986 they used the wimpy LG4 cam on the TPI and killed the horsepower. The first thing i did when i had the engine rebuilt is i bought that camshaft, and believe me its worth the $50 i paid at carquest. The reason i picked this cam is because chevy did all the testing already and i knew it would work, and it bumped the horsepower from 190 to 215. The second thing you probably want to do, which is pretty cheap, is replace the stock rockers from 1.5 to 1.6 ratio. I plan to do this in the near future since it will boost your lift without having to get a bigger cam. I didn't know the L69 HO had bigger exhaust manifolds until just now, i guess you learn something every day! And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it. I wouldnt worry too much about what other people think about a 305, they aren't going to drive it right?
If you want my opinion, and opinions are cheap....
I say be different, if you want a 5.0L engine, do it. When fate came around and ruined my TPI 305 in a flood, i rebuilt my engine to keep the virgin block still in the car ( i wanted it original). I noticed you put 86 in your name, so if you have an 86 like i do, i recommend changing the cam for at least the L69/LB9 cam that came in the 1985 cars. In 1986 they used the wimpy LG4 cam on the TPI and killed the horsepower. The first thing i did when i had the engine rebuilt is i bought that camshaft, and believe me its worth the $50 i paid at carquest. The reason i picked this cam is because chevy did all the testing already and i knew it would work, and it bumped the horsepower from 190 to 215. The second thing you probably want to do, which is pretty cheap, is replace the stock rockers from 1.5 to 1.6 ratio. I plan to do this in the near future since it will boost your lift without having to get a bigger cam. I didn't know the L69 HO had bigger exhaust manifolds until just now, i guess you learn something every day! And to all the 350 lovers out there, ive dusted a few L98s and Vettes, and i know a guy with this awesome LG4 305 with a T5 that has dusted cobras, vettes, jap crap, you name it. I wouldnt worry too much about what other people think about a 305, they aren't going to drive it right?
No sense in worrying about what other people think, because they wont care, just like you said. They will be too busy laughing when they win.
12-29-2004, 11:03 PM
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You guys are all right. Don't waste your time on a 305. I am only pushing 343 RWHP on my 305 and Willie has only gained around 100 more HP with his mods.
Stick to a crate motor and call it a day!
Stick to a crate motor and call it a day!
12-29-2004, 11:10 PM
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Originally posted by mypontiac
You guys are all right. Don't waste your time on a 305. I am only pushing 343 RWHP on my 305 and Willie has only gained around 100 more HP with his mods.
Stick to a crate motor and call it a day!
You guys are all right. Don't waste your time on a 305. I am only pushing 343 RWHP on my 305 and Willie has only gained around 100 more HP with his mods.
Stick to a crate motor and call it a day!
And it could have been like 390 or more if you would have started with a 350 instead. So what exactly is your point? Besides the fact that you got talked into a 305 instead?
Edit: BTW, way to bring a thread back to life fanning the fire!
Last edited by ljnowell; 12-29-2004 at 11:12 PM.
12-29-2004, 11:28 PM
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Car: 1985 Camaro Z-28
Engine: 305 V-8 4BBL (H) Supercharged
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Weiand makes a smog legal blower for our little 305's that can add another 100 hp onto a stock motor with original carb!!
12-29-2004, 11:35 PM
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Car: 1985 Camaro Z-28
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Ok, so the extra grand you spend buying a 350 could get you 1/2 way towards your wieand blower.
12-29-2004, 11:40 PM
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Originally posted by KnightWarrior
Ok, so the extra grand you spend buying a 350 could get you 1/2 way towards your wieand blower.
Ok, so the extra grand you spend buying a 350 could get you 1/2 way towards your wieand blower.
How do you figure a grand? This thread is based on rebuilding an engine. There is not a 1000 dollar difference in rebuilding a 305 and 350. The only cost difference is the price of the 350 core, which is no more than 100 dollars.
12-29-2004, 11:45 PM
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The grand is based on a quality rebuilt or crate motor. But let's face it, at smog time a 350 is a no-no. Only what came with it (305) is what smog ***** want to see under the hoodat least here in cali.
12-29-2004, 11:51 PM
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Originally posted by KnightWarrior
The grand is based on a quality rebuilt or crate motor. But let's face it, at smog time a 350 is a no-no. Only what came with it (305) is what smog ***** want to see under the hoodat least here in cali.
The grand is based on a quality rebuilt or crate motor. But let's face it, at smog time a 350 is a no-no. Only what came with it (305) is what smog ***** want to see under the hoodat least here in cali.
As far as emmissions you are right. Some people sneak past with 350's because they look exactly the same. If they check the casting number though, you are screwed. I am lucky, no emmisions in my area. Thats why I have a 2.8L MPFI camaro with a Carb'd 350 in it.
12-30-2004, 06:04 AM
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I have a 305, and I've gone through MANY mods- if you're interested in working on cars at all, get a 350 and rebuild that, rather than the 305 or you will regret it until the day you die.
12-30-2004, 12:34 PM
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The only reason I would consider rebuilding my 305 instead of a 350 is because I've considered twin turboing it. BUT, I would use some cheap 14B's off a 1st gen DSM car, which you can find for like $100 each. They should support a 305 to about 5000-5500RPM or so, but wouldn't support near that on a 350. It would be much cheaper to buy two 14B's and t/t a 305 than it would be to buy two 16Gs or 18Gs to t/t a 350. What's nice about building the turbo setup on a 305 with 14Bs, is that you could always buy 16G's in the future and swap onto a 350. My thing is the up-front cost of another $600-700 for the upgraded turbos.
In any case, I'm just saying the only reason I'd rebuild the 305 is for that reason. In either case, whenever my little 305 decides to puke, I'm dropping a 350 in. It may come even sooner than that since my motor has 84k miles on it right now. Chances are I'm going to run out of bolt-ons to do before the motor dies, so the 350 would go in when I can't (easily) make any more power out of the 305
In any case, I'm just saying the only reason I'd rebuild the 305 is for that reason. In either case, whenever my little 305 decides to puke, I'm dropping a 350 in. It may come even sooner than that since my motor has 84k miles on it right now. Chances are I'm going to run out of bolt-ons to do before the motor dies, so the 350 would go in when I can't (easily) make any more power out of the 305
12-30-2004, 01:24 PM
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I'm hoping to be a bit faster than that....low to mid 13s from my setup. Isn't quite together just yet. I have about another $500 to spend on getting all the parts, but that cost includes headers/Ypipe (Hedmans I think)
12-30-2004, 04:38 PM
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Car: 1991 Conv. TA
Engine: Forged 350 with D-1SC
And it could have been like 390 or more if you would have started with a 350 instead. So what exactly is your point? Besides the fact that you got talked into a 305 instead?
Talk to the hand.
I have more power that most on the board. I didn't have to remove my engine to make this power. I still have matching numbers on a rare 1991 convertible.
Nuff said. :rockon: :rockon: :rockon:
Talk to the hand.
I have more power that most on the board. I didn't have to remove my engine to make this power. I still have matching numbers on a rare 1991 convertible.
Nuff said. :rockon: :rockon: :rockon:
12-30-2004, 05:30 PM
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Originally posted by mypontiac
And it could have been like 390 or more if you would have started with a 350 instead. So what exactly is your point? Besides the fact that you got talked into a 305 instead?
Talk to the hand.
I have more power that most on the board. I didn't have to remove my engine to make this power. I still have matching numbers on a rare 1991 convertible.
Nuff said. :rockon: :rockon: :rockon:
And it could have been like 390 or more if you would have started with a 350 instead. So what exactly is your point? Besides the fact that you got talked into a 305 instead?
Talk to the hand.
I have more power that most on the board. I didn't have to remove my engine to make this power. I still have matching numbers on a rare 1991 convertible.
Nuff said. :rockon: :rockon: :rockon:
I am going to be a good member and stop posting on this pointless thread.
Enjoy your 305's, and keep building them, all the 350 guys will love for it.
12-30-2004, 09:17 PM
#74
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Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Matching numbers means jack squat on a thirdgen.
Well, that would depend on rarity on the car. I happen to own one of the rarest, a 1987 Z28 convertible (1 of 12) with a 305 TPI / 5-speed (1 of 2). This car must remain numbers matching.
If you put all that work into an engine, AND rebuilt the bottom end, then you wasted your money.
This is not a black and white issue. There are several shades of gray in between. In other words, there is no right and no wrong. It depends on what you want. I for one have built my 305 to the hilt. Why? Simple. I wanted to prove to guys that run 350's and larger cubes that a 305 can play the same game. My current best is a 12.00 @ 117.62 mph with a D1SC making 14-psig boost. My new setup will be Gale Banks' twin turbos in lieu of the D1SC running through ATI's twin intercooler setup, which I designed for a third gen. Can you say "10's"? (Maybe 9's.)
Enjoy your 305's, and keep building them....
Absolutely!
...all the 350 guys will love for it.
hehehe....... It's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
Laters! I'm done here.
Well, that would depend on rarity on the car. I happen to own one of the rarest, a 1987 Z28 convertible (1 of 12) with a 305 TPI / 5-speed (1 of 2). This car must remain numbers matching.
If you put all that work into an engine, AND rebuilt the bottom end, then you wasted your money.
This is not a black and white issue. There are several shades of gray in between. In other words, there is no right and no wrong. It depends on what you want. I for one have built my 305 to the hilt. Why? Simple. I wanted to prove to guys that run 350's and larger cubes that a 305 can play the same game. My current best is a 12.00 @ 117.62 mph with a D1SC making 14-psig boost. My new setup will be Gale Banks' twin turbos in lieu of the D1SC running through ATI's twin intercooler setup, which I designed for a third gen. Can you say "10's"? (Maybe 9's.)
Enjoy your 305's, and keep building them....
Absolutely!
...all the 350 guys will love for it.
hehehe....... It's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
Laters! I'm done here.
01-03-2005, 05:33 PM
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Originally posted by Willie
[BIt's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
[/B]
[BIt's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
[/B]
01-12-2005, 08:22 PM
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Car: 1987 Camaro Z-28 IROC
Engine: 5.0 305ci TPI
Transmission: 700R4
I happen to like my 305
No its not a 350, but my 87 Z-28 IROC is a rare original as well.. 305 TPI..No t-tops, Option 3 package, 700R4, with 52000 miles..With just a few mods, I raised my RWHP to 200 and 274 RWTQ..First I added the TPIS fast pak with adjustable fuel reg, added SLP shortie headers, jet-hot coated, SLP off road Y-pipe, 3" stainless exhaust with 80 series flowmaster, then duals out the back, then I added SLP large intake runners, ported and polished them, ported and polished the plenum, de-screened the MAF, 8.8 MSD plug wires, and the 700R4 was rebuilt with a trans go comp shift kit with B&M Mega shifter..The end result is 200 RWHP from the dyno..I wouldn`t spend anymore money on trying to get more out of the 305..but hate to pull it out in favor of a 350..would only go that far if it had alot of miles on it and the body was crap,,but its never been driven in the winter and barely in the rain..and it is pretty quick..Oh yea, I added a QTP electric cut-out too which really sounds awesome, and had the prom chip custom tuned and re-programed.. but the cost was a bit more than a $1000 that the guy wanted to spend..
01-12-2005, 09:28 PM
#78
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Car: 1991 Conv. TA
Engine: Forged 350 with D-1SC
Roadvoyeur,
Damn fine looking engine! :yourock:
Your mods sound very much like what I did to my TA prior to adding the ATI supercharger.
If you decide you want more power with the original engine, contact Dave at http://www.tenperf.com/.
I went from 260 FWHP to 343 RWHP with the addition of the supercharger.
Looks to me like you did all of the prep work and are already for it!
All a matter of $$$.
Damn fine looking engine! :yourock:
Your mods sound very much like what I did to my TA prior to adding the ATI supercharger.
If you decide you want more power with the original engine, contact Dave at http://www.tenperf.com/.
I went from 260 FWHP to 343 RWHP with the addition of the supercharger.
Looks to me like you did all of the prep work and are already for it!
All a matter of $$$.
01-12-2005, 09:59 PM
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Car: 1991 Conv. TA
Engine: Forged 350 with D-1SC
KnightWarrior,
Not sure if you are directing this to me, but mileage is not a problem with my car.
When I used my car as a daily driver, I only filled up once a week.
With a supercharger on a 305, the fuel only gets significantly used during boost. Nice set up.
So basiacally, if you want to play you got to pay!
Not sure if you are directing this to me, but mileage is not a problem with my car.
When I used my car as a daily driver, I only filled up once a week.
With a supercharger on a 305, the fuel only gets significantly used during boost. Nice set up.
So basiacally, if you want to play you got to pay!
01-13-2005, 06:48 PM
#81
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Car: 1984 Camaro on steroids/ 1987 iroc-z28 5 speed.
Engine: 383 nitrous motor / poindexter 305
Transmission: Th350
Originally posted by Willie
Matching numbers means jack squat on a thirdgen.
Well, that would depend on rarity on the car. I happen to own one of the rarest, a 1987 Z28 convertible (1 of 12) with a 305 TPI / 5-speed (1 of 2). This car must remain numbers matching.
If you put all that work into an engine, AND rebuilt the bottom end, then you wasted your money.
This is not a black and white issue. There are several shades of gray in between. In other words, there is no right and no wrong. It depends on what you want. I for one have built my 305 to the hilt. Why? Simple. I wanted to prove to guys that run 350's and larger cubes that a 305 can play the same game. My current best is a 12.00 @ 117.62 mph with a D1SC making 14-psig boost. My new setup will be Gale Banks' twin turbos in lieu of the D1SC running through ATI's twin intercooler setup, which I designed for a third gen. Can you say "10's"? (Maybe 9's.)
Enjoy your 305's, and keep building them....
Absolutely!
...all the 350 guys will love for it.
hehehe....... It's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
Laters! I'm done here.
Matching numbers means jack squat on a thirdgen.
Well, that would depend on rarity on the car. I happen to own one of the rarest, a 1987 Z28 convertible (1 of 12) with a 305 TPI / 5-speed (1 of 2). This car must remain numbers matching.
If you put all that work into an engine, AND rebuilt the bottom end, then you wasted your money.
This is not a black and white issue. There are several shades of gray in between. In other words, there is no right and no wrong. It depends on what you want. I for one have built my 305 to the hilt. Why? Simple. I wanted to prove to guys that run 350's and larger cubes that a 305 can play the same game. My current best is a 12.00 @ 117.62 mph with a D1SC making 14-psig boost. My new setup will be Gale Banks' twin turbos in lieu of the D1SC running through ATI's twin intercooler setup, which I designed for a third gen. Can you say "10's"? (Maybe 9's.)
Enjoy your 305's, and keep building them....
Absolutely!
...all the 350 guys will love for it.
hehehe....... It's these guys who I always seem to surprise at the track. They usually come over to me in the pits and ask what I'm running. I always answer, "A 305."
Laters! I'm done here.
01-13-2005, 09:47 PM
#82
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Car: 1987 Camaro Z-28 IROC
Engine: 5.0 305ci TPI
Transmission: 700R4
My Pontiac
Thanks My Pontiac, I will check out the link you suggested and I have considered a supercharger last summer, but now with the gains you related to me, I just might have to seriously look into it..
Here is another pic of my 87 Z-28 IROC..
http://members.cardomain.com/roadvoyeur
Here is another pic of my 87 Z-28 IROC..
http://members.cardomain.com/roadvoyeur
01-13-2005, 10:14 PM
#83
Originally posted by REALPOWER
Are you planning on running 10's or 9's on a stock (but modified) bottom end? If your not beefing up your bottom end, you couldn't pay me enough to take a pass down the track in it.
Are you planning on running 10's or 9's on a stock (but modified) bottom end? If your not beefing up your bottom end, you couldn't pay me enough to take a pass down the track in it.
01-14-2005, 02:07 PM
#84
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Car: 1984 Camaro on steroids/ 1987 iroc-z28 5 speed.
Engine: 383 nitrous motor / poindexter 305
Transmission: Th350
It says
Forged TRW Pistons (Flat top with valve reliefs)
ARP Main Bearing Studs
Stock Crankshaft
Stock Connecting Rods
Melling High Volume Oil Pump
???
Forged TRW Pistons (Flat top with valve reliefs)
ARP Main Bearing Studs
Stock Crankshaft
Stock Connecting Rods
Melling High Volume Oil Pump
???
01-14-2005, 02:51 PM
#86
here ya go, 2 minute search got these results:
https://www.thirdgen.org/techbb2/sho...&highlight=305
https://www.thirdgen.org/techbb2/sho...&highlight=305
01-14-2005, 03:12 PM
#87
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Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
Originally posted by mw66nova
are you looking on his website? that thing hasn't been updated in like years man!
are you looking on his website? that thing hasn't been updated in like years man!
Not the dude's fault if Willie is lazy. Right Willie? 
01-14-2005, 09:16 PM
#88
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Car: 1984 Camaro on steroids/ 1987 iroc-z28 5 speed.
Engine: 383 nitrous motor / poindexter 305
Transmission: Th350
Originally posted by mw66nova
are you looking on his website? that thing hasn't been updated in like years man!
are you looking on his website? that thing hasn't been updated in like years man!
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