V8 vs. built 4.3
- Thread starter 1BadElky
- Start date
sparkwire
Donating Member
Re: V8 vs. built 4.3
http://weberracing.net/Engine-Type-...k-Assembled-Shortblocks/c2_3_22_31/index.html are 4.3 builds less expensive than these? not trying to advertise just compare.
http://weberracing.net/Engine-Type-...k-Assembled-Shortblocks/c2_3_22_31/index.html are 4.3 builds less expensive than these? not trying to advertise just compare.
Last edited:
dgoodhue
BuSTeD 4.3
Re: V8 vs. built 4.3
Its hard to comapre motor from 2 different shops. When I had my Corvette I would hear about guy with 2000-2500 stoker SBC with parts included. My local shop want that in labor for splayed 4 bolt SBC not including parts.
If you want to compare them, think about a 4.3 as a 3/4 350. Most of the parts cost the same, their might not be as many choices (especially connecting rods) but they rally don't cost much different to build up.
The major differences in cost for short block would be 4 bolt splayed caps, billet crank (if you go that route) for the 4.3's. I am not expert on LS series, but I think the only thing that is pricey is resleeving the aluminum blocks (I am not sure if anyone does this anymore with all the block choices out their)
Heads, their are lot of options for heads with LS and SBC's. You could get away with a basic stock heads or fully port CNC set of aftermarket aluminum heads. Their are far few choices with 4.3, Factory castings, race castings, and how much do you want to spend porting them. Their are also costs associated with swapping to Vortecs. Once you get into the more exotic heads, you really looking at full custom setup.
Once most people get into the Bowtie build up with custom heads, intake, Billet crank and realizing almost everything will have to be fabricated is when LS Turbo series, starts looking very appealing, if you going to have to fabricated it anyways might as well use cheaper motor that has more potential and still can be less stressed than an all out 4.3.
sparkwire said:
Its hard to comapre motor from 2 different shops. When I had my Corvette I would hear about guy with 2000-2500 stoker SBC with parts included. My local shop want that in labor for splayed 4 bolt SBC not including parts.
If you want to compare them, think about a 4.3 as a 3/4 350. Most of the parts cost the same, their might not be as many choices (especially connecting rods) but they rally don't cost much different to build up.
The major differences in cost for short block would be 4 bolt splayed caps, billet crank (if you go that route) for the 4.3's. I am not expert on LS series, but I think the only thing that is pricey is resleeving the aluminum blocks (I am not sure if anyone does this anymore with all the block choices out their)
Heads, their are lot of options for heads with LS and SBC's. You could get away with a basic stock heads or fully port CNC set of aftermarket aluminum heads. Their are far few choices with 4.3, Factory castings, race castings, and how much do you want to spend porting them. Their are also costs associated with swapping to Vortecs. Once you get into the more exotic heads, you really looking at full custom setup.
Once most people get into the Bowtie build up with custom heads, intake, Billet crank and realizing almost everything will have to be fabricated is when LS Turbo series, starts looking very appealing, if you going to have to fabricated it anyways might as well use cheaper motor that has more potential and still can be less stressed than an all out 4.3.
NecroWolf
lost marbles member
Re: V8 vs. built 4.3
as far as price difference i got offered a low mile 02 ss camaro ls motor for 2000. this was a cut out, complete intake to oil pan. but you would have to either use the stock ecm or get the complete fast setup w/ their ignition control box and trans controler. so pricewise its probably close in the end if you're going twin turbo. of course you could do like i'm doing and make all the upgrades you can before you swap the motor.
as far as price difference i got offered a low mile 02 ss camaro ls motor for 2000. this was a cut out, complete intake to oil pan. but you would have to either use the stock ecm or get the complete fast setup w/ their ignition control box and trans controler. so pricewise its probably close in the end if you're going twin turbo. of course you could do like i'm doing and make all the upgrades you can before you swap the motor.
HighPerformanceTrucks
Lift & Shift Specialist
Re: V8 vs. built 4.3
I was at the same crossroads, but I ultimately opted to stick with a turbo v6. I could have had a complete C6 Z06 7 liter motor dry sump and all and still have plenty of money left over, but I decided a Turbo V6 is really the heart and soul of the Syclone. Plus the motor is lighter and less weight hanging over the front axle which helps in my case since I'm basically road racing the truck anyway.
I was at the same crossroads, but I ultimately opted to stick with a turbo v6. I could have had a complete C6 Z06 7 liter motor dry sump and all and still have plenty of money left over, but I decided a Turbo V6 is really the heart and soul of the Syclone. Plus the motor is lighter and less weight hanging over the front axle which helps in my case since I'm basically road racing the truck anyway.
Ground Rat
New member
Re: V8 vs. built 4.3
Have you thought about going switching to a twin screw blower?ivanko barbell said:
Daveman2
Autox Blazer
Re: V8 vs. built 4.3
I'm sort of in the same boat as the thread starter, I have a mildly built N/A V6 (maybe 240rwhp), and I am contemplating my various routes to go in the future for performance. It's already a pretty fun truck, but the LS Swap seems so tempting. However, not many cars run a v6 on the track/auto-x, so I think it's pretty interesting to keep it.
I'm also making my blazer as light as possible, so a 4.3L with a strong top end and not much low end torque would be fine, it pulls in 3rd below 1500RPM as it is, and I still have a good 300lbs to drop or more, also if I could built it so it could spin it to 6k+rpms regularly it
would probably sound amazing and be a blast to drive.
I'm also in California, so emissions always kill me. Trying to build a 300HP N/A V6 is alot harder to keep legal versus a stock 400HP aluminum V8 swap of a newer year, and then I could add bolt-ons and still stay legal but make insane power.
What to do?
:rotf: :rotf: :rotf:Ground Rat said:
I'm sort of in the same boat as the thread starter, I have a mildly built N/A V6 (maybe 240rwhp), and I am contemplating my various routes to go in the future for performance. It's already a pretty fun truck, but the LS Swap seems so tempting. However, not many cars run a v6 on the track/auto-x, so I think it's pretty interesting to keep it.
I'm also making my blazer as light as possible, so a 4.3L with a strong top end and not much low end torque would be fine, it pulls in 3rd below 1500RPM as it is, and I still have a good 300lbs to drop or more, also if I could built it so it could spin it to 6k+rpms regularly it
would probably sound amazing and be a blast to drive.
I'm also in California, so emissions always kill me. Trying to build a 300HP N/A V6 is alot harder to keep legal versus a stock 400HP aluminum V8 swap of a newer year, and then I could add bolt-ons and still stay legal but make insane power.
What to do?
The Devils Own Chariot
Active member
Re: V8 vs. built 4.3
I raced an s10 with a 700r4 and sy/ty drivetrain AWD. He was running a 327 with a 750cc carb. It was no match for the stock sy with alcohol injection.
I raced an s10 with a 700r4 and sy/ty drivetrain AWD. He was running a 327 with a 750cc carb. It was no match for the stock sy with alcohol injection.
NecroWolf
lost marbles member
Re: V8 vs. built 4.3
the biggest headache i could see in this would be fitting the ls motor and a 4l80 in there, being as the trans tunnel needs modified. seeing as i'm going to end up doing floor surgery at some ponit down the road on my ty i think i might just try it. does andyone have the aproximate measurements required for the modification?
the biggest headache i could see in this would be fitting the ls motor and a 4l80 in there, being as the trans tunnel needs modified. seeing as i'm going to end up doing floor surgery at some ponit down the road on my ty i think i might just try it. does andyone have the aproximate measurements required for the modification?
HighPerformanceTrucks
Lift & Shift Specialist
Re: V8 vs. built 4.3
No. Not after the money I sunk into the project.
No. Not after the money I sunk into the project.
Ground Rat said: