View Full Version : 4.3l<305v8
THA_BAD_ONE-0
03-06-06, 01:33 PM
Just asking does a stock 4.3l make more power than a 305v8
Matt 4.3 TBI
03-06-06, 01:43 PM
I was looking at swapping a 305 TBI from an 89 Camaro into my Blazer a few years ago. That is until I saw the depressing numbers it had. 170hp and 255ft/lbs. My 4.3 stock cranked out 160hp and 230ft/lbs. Wasn't near enough of a gain to warrant the time and money involved.
Sparky2263
03-07-06, 08:28 AM
The 305 has more power potential. Heck, a 283 has more power potential. 8 firing sequences vs. 6 at the same cubes will win out every time.
But, a badass V6 is still pretty cool.
THA_BAD_ONE-0
03-08-06, 01:11 PM
Well if i keep it what will i have to do to get it running pretty quick. With out going into the motor. With the stock bore and a cam and lifter set what else will get me running good Maybe at 230 crank
Keep it... why yank a good motor? I'd look into headers, 3" dual exhaust with a cross pipe and Edelbrock intake to start...
Another good 305 article...
http://www.goingfaster.com/spo/praisetbi.html
An excerpt from the article: 'Some "knowledgeable" people will tell you that a 305 can't make any appreciable street power, they'll tell you that you can't ever do anything serious with any engine as small as a 305. I tend to approach life differently than other people, instead of asking what a motor can't do, instead I ask what a motor can do.'
firefighter
03-08-06, 06:34 PM
I've seen some tough 305's in the past but the problem allways ends up being it will cost the exact same amount to mod a 305 as it would a 350 so the fact becomes why give up the cubes (and potential power) by building a 305. If you have a 305 you inevitably will need to build the short block you might as well hit the junk yard and get a 350 for a couple of hundred and build it.
firefighter
03-08-06, 06:34 PM
Keep it... why yank a good motor? I'd look into headers, 3" dual exhaust with a cross pipe and Edelbrock intake to start...
Another good 305 article...
http://www.goingfaster.com/spo/praisetbi.html
An excerpt from the article: 'Some "knowledgeable" people will tell you that a 305 can't make any appreciable street power, they'll tell you that you can't ever do anything serious with any engine as small as a 305. I tend to approach life differently than other people, instead of asking what a motor can't do, instead I ask what a motor can do.'
and is this the Tink from the ORG?
I just think if you already have a 305, why not mod it, run the crap out of it and if/when it goes then replace it with the 350... Most parts you can buy to mod the 305 can be used on the 350. Plus, as cheap as the SR Torquer heads are why not buy them too....
As I have said before, I agree the 350 is better BUT if you have the 305 use it... it isn't a boat anchor... you can get appreciable street power out of it. Besides EVERYONE goes 350, why not do something different?? Heck just because everyone yanks a 4.3L for the 350, I'm not... I want to know what I can get out of that 4.3L in my Blazer.
firefighter, yup this is Tink from the ORG...
Sparky2263
03-09-06, 09:51 AM
you already have a 305, why not mod it, run the crap out of it and if/when it goes then replace it with the 350
yup, yup.
305 in a Monte SS. 292 cam, 3000 stall,4.11 gears, worked cast iron heads (not near as good as Vortecs or S/R Torquers) = 13.2's in the 1/4.
you could get just as much power from the 4.3l because you can bore it and stroke it and end up with less weight than the 305, you could all but siamese the 4.3l you can not do nearly as much to the 305.
plus the equivalent 305 will not take the abuse or hp that the 4.3l will. i've built a 305 and it was a huge waste of time. you can get 300+ out of the 4.3L the most i've seen from a 305 was from a magazine build up with something like 327hp or something and the work they did was not worth it.
the 305 is a boat anchor.
Sparky2263
03-15-06, 10:46 PM
I digress. The split crank pin on the V6 is the weak point. The stock racers are putting upwards of 375 hp to the wheels with a cast iron intake and heads.
And that takes a LOT of rpm's. rpm's a 4.3 could never stand.
Sparky2263
03-15-06, 10:49 PM
yup, yup.
305 in a Monte SS. 292 cam, 3000 stall,4.11 gears, worked cast iron heads (not near as good as Vortecs or S/R Torquers) = 13.2's in the 1/4.
At 3600 lbs. Anybody got a hp calculator? ;)
At 3600 lbs. Anybody got a hp calculator? ;)
Yup!
Sparky2263
03-16-06, 05:59 PM
Wellllll...............
you've got to do a lot of work to a 305 to get 320 hp. i would say you could do more to the 4.3 and come out on top if you fixed the bottom end. there is no solution to the cylinder wall problems and intake manifold leaking on the 305. atleast the 4.3L takes on the block of the 350.
THA_BAD_ONE-0
03-18-06, 07:30 PM
you can build a 305 for a cheap price when almost every sbc part fit it. Beside dont you like tha v8 sound. I was once like you saying i going six but why when stuff is cheap and it sounds cool
THA_BAD_ONE-0
03-18-06, 07:32 PM
Yea, i kind of left out some pretty important info on my motor that i just found out. 86 305HO. I think my hp numbers are not as depressing as i thought. Did it have like 2sumthin hp??????
ssdime8238
03-18-06, 09:27 PM
i think the ho ones had like 190hp but from what i heard they werent all that great. my 87 z28 with a 305 went for a 15.2 in the 1/4 all stock with a 139 thousand miles not saying thats fast but for a all stock motor its not all that bad...also there is a company called power house performance that makes a stroker kit for a 305 kinda cool and alittle different.
i'm not saying you can't make power with a 305, but they are seriously prone to over heating if you try and do anything to the bore, the later versions aren't AS bad, but the best thing you can do is put mpfi from a camaro on it with a good cam, stroke it and hope fore the best. you can punch out a 4.3L just as much as a 350, and stroke it. if the crank is an issue... replace it, but you will not have the cylinder wall and over heating problems that maxed out 305's do.
it maybe cheap to do up a 305, but it's just as cheap to put 350 parts into a 4.3L in that regard.
THA_BAD_ONE-0
03-19-06, 10:31 AM
Which is true. But i am having a 350 built for my truck. But as far as now my v6 is blown. And my dads a mechanic so he says i need to take steps so, so far i went from 2.5l, 4.3l, 4.3l, and now 5.0lHO, after this will be my first and built 355. So now you can see where i am coming from.
it maybe cheap to do up a 305, but it's just as cheap to put 350 parts into a 4.3L in that regard.
This is what I guess I don't get... I've been looking at building up the 4.3L in my 2wd and the 350 in my pickup... what I find is parts (cams, intakes) for the 4.3L are vastly more expensive then those for the V8.
Sparky2263
03-20-06, 08:50 AM
Yup, yup. Pistons, timing chain, balancer, flywheel, pushrods, lifters, valves and rockers are about the only carryovers. The stuff you REALLY want (cams, intakes and headers) are less choice and more expensive.
As I said before, 8 firing pulses, 43 more cubic inches will win out every time.
THA_BAD_ONE-0
03-20-06, 09:55 PM
I passed on what you said sparky about the monte and got this in return.
Quote: Originally Posted by Tha s-10 305 in a Monte SS. 292 cam, 3000 stall,4.11 gears, worked cast iron heads (not near as good as Vortecs or S/R Torquers) = 13.2's in the 1/4. my mistake
I think your buddy may be lying to you about the size engine he's got. I can't say that I have saw a 305 with a cam that big .... but I can tell you it would be a DOG. your talking around 240 @ .050 in a 305 with tiny valve heads. No vacuum... so forget your power brakes. definitely don't try your buddies set-up. just put it in their stock or maybe put a stock LT1 cam some guy has that is upgrading.
put your 292 cam in your 305 and come back and tell me how wrong I am. It will be a POS in my opinion. you would basically be camming for top end power. something a long stroke... tiny bore motor.wasn't designed for....sure anything is possible.......to really make something like that work you would need some serious compression to try and gain back some of the low end the cam has taken away. BTW 305's are also notorious detonators. the bores will only take so big of valves so that will further limit top end. You will have a loping idle no doubt ..extremely crappy gas mileage....and mediocre power at best with a 3000 stall and 4.10 gears . forget the stall or gears and you have a rice boys fantasy. IMO
I dont know but i take sparky's word over his But idunno Is what he saying true
Sparky2263
03-20-06, 10:19 PM
No power brakes, crappy gas mileage, mediocre power.....yup, yup, he got me there.
But, I was running 13.2's for under $1500. That was the fun part.
;)
true the shorter pieces like the cam and crank will cost you, but everything else is parity.
2 more cylinders 25% more weight also and highly limited potential. you really can't do much to a 305's internals and it will not 'bolt' in.
Mintsick
03-22-06, 11:22 AM
true the shorter pieces like the cam and crank will cost you, but everything else is parity.
2 more cylinders 25% more weight also and highly limited potential. you really can't do much to a 305's internals and it will not 'bolt' in.
Definitely, the crank is a definite issue, but for the 4.3L cams people seem to forget that most 4.3 cams are roller, which are more expensive to begin with.
true the shorter pieces like the cam and crank will cost you, but everything else is parity.
2 more cylinders 25% more weight also and highly limited potential. you really can't do much to a 305's internals and it will not 'bolt' in.
How does adding 2 cylinders limit your potential. As sparky has proved, you can pull a 13 sec, (maybe down to low 12 even high 11 on juice) out of a 305 for as much work as you could on the 4.3
Slo Dimer
03-23-06, 08:13 PM
Personally, I would....
http://cgi.ebay.com/ebaymotors/1986-Buick-Grand-National-GN-Engine-Motor_W0QQitemZ8049100969QQcategoryZ33615QQrdZ1QQc mdZViewItem
...but thats just me.
THA_BAD_ONE-0
03-23-06, 11:59 PM
naw i find wit my 3o'z There was a build in a mag with a 307 with cam intake and heads pull 315 hp wit 330tq i think so i find but thanks And that under 1000.00 What would it take for a 4.3l to be in the high 12's and low 13's
Sparky2263
03-24-06, 08:35 AM
A 135 shot of nitrous......
;)
biglouie_underpressure
03-26-06, 05:23 AM
I digress. The split crank pin on the V6 is the weak point. The stock racers are putting upwards of 375 hp to the wheels with a cast iron intake and heads.
And that takes a LOT of rpm's. rpm's a 4.3 could never stand.
it's been proven time after time a 4.3 crank can handle 600hp with billet caps altho it's a split pin the journal is 2.250 vs a small block 2.100 and the blocks are the weakest link if your talking 92+.
biglouie_underpressure
03-26-06, 05:33 AM
How does adding 2 cylinders limit your potential. As sparky has proved, you can pull a 13 sec, (maybe down to low 12 even high 11 on juice) out of a 305 for as much work as you could on the 4.3
5.0L v6 vs. a 305 v8 who will win?
5.0L v6 vs. a 305 v8 who will win?
How are you going to make it a 5.0 v6? If you are strokeing it that is a $2K crank. If you are boreing it that is a $2K block. To get some good heads for the v6, because for the displacement if you want to rev the motor you are going to needs something better than vortecs, that is annother $2K. Also, you can put crappier flowing heads on the v8 and still have more total air flow capability due to the extra ports.
Sparky2263
03-26-06, 11:15 AM
Well, that's a question I've already answered. 8 firing pulses vs. 6 will win out at the same cubic inches. The 8 cyl. will be much less peaky and have a much flatter curve.
I'm not sure why the argument is still carrying. Why would we want anyone to believe a V-6 would be superior to a V-8? Common sense carrys the day for those who don't get caught up in whacked out theorys.
The original question was, if I had both (a 4.3 or a 5.0), which should I go with.
The 305, hands down. As was stated earlier, anything you do to it will carry over to a bigger small block Chevy. That in itself ends it for me.
northcoastrides
03-26-06, 01:07 PM
naw i find wit my 3o'z There was a build in a mag with a 307 with cam intake and heads pull 315 hp wit 330tq i think so i find but thanks And that under 1000.00 What would it take for a 4.3l to be in the high 12's and low 13's lots of $$$...but if a V8 swap is only going to net 270-315 hp it hardly seems worth it considering the extra weight you now have to push,might as well put the effort into the 4.3.So I guess what I'm saying if your on a budget V8 swap isn't the way to go because instead of just reworking the motor you'll end reworking the entire drive train.Every swap has it's difference's but what they all have in common is in the long run it will cost 2-3 times more than you planed on,I also remember alot of guys in the 80's droping stock V8's into Vega's they thought they would have a rocket ship but instead all they had was a low performance motor in a lighter package "still a stone". Everything we humans do there's only one equation we have to remember ( you get what you pay for )especially horsepower with one exception the project someone else already put money and time into and wants to bail out of
biglouie_underpressure
03-27-06, 04:15 PM
How are you going to make it a 5.0 v6? If you are strokeing it that is a $2K crank. If you are boreing it that is a $2K block. To get some good heads for the v6, because for the displacement if you want to rev the motor you are going to needs something better than vortecs, that is annother $2K. Also, you can put crappier flowing heads on the v8 and still have more total air flow capability due to the extra ports.
didn't answer the question...the question had to do with weight not $$
5.0L v6 vs. a 305 v8 who will win?
Thats not even the debate here. It is 4.3 v6 vs. a 305 v8, and I know who id put my money on.
biglouie_underpressure
03-27-06, 04:19 PM
lets all face it a 305 swap is lame for the power and weight your getting for 8 cylinders.
biglouie_underpressure
03-27-06, 04:21 PM
Thats not even the debate here. It is 4.3 v6 vs. a 305 v8, and I know who id put my money on.
lol depends of if sparky is building the motor j/k . how about you put up your money on your 383 combo against my good ole 4.3 ;)
Lemme get her built, sprayed and 4 linked and then well talk ;)
Sparky2263
03-27-06, 06:10 PM
Just asking does a stock 4.3l make more power than a 305v8
Back to the original post. The answer is no.
Sparky2263
03-27-06, 06:12 PM
The 305 has more power potential. Heck, a 283 has more power potential. 8 firing sequences vs. 6 at the same cubes will win out every time.
But, a badass V6 is still pretty cool.
And my original response.
Have we beat this horse enough yet?
THA_BAD_ONE-0
03-28-06, 01:50 PM
[QUOTE=Sparky2263]And my original response.
Have we beat this horse enough yet?[/QUOTE
I think we have there is nothing else to debate. I Made my decision!!
biglouie_underpressure
03-28-06, 03:06 PM
And my original response.
Have we beat this horse enough yet?
i guess not ! hommie is still doing a 305 swap lol. One thing i do like about a 305 are those small cute pistons.
:kicks dead horses body:
Yup, weve killed this one...killed it dead.
Sparky2263
04-16-06, 07:33 PM
Thread resurrected.
Guy I race with at G-ville. 305, stock block, stock heads with some work, small cam, dual plane cheapy intake, Edelbrock carb. Stock converter, 3.08 rear gears (as can be evidenced by the meager 60' time).
I'll let the pics speak for themselves. Momma always said, "seein is believen"....
http://www.s10planet.com/forum/attachment.php?attachmentid=2220&stc=1
http://www.s10planet.com/forum/attachment.php?attachmentid=2219&stc=1
THA_BAD_ONE-0
04-17-06, 12:35 PM
i like the sounds of dat
THA_BAD_ONE-0
05-03-06, 01:20 PM
i want some more info on that truck
i want some more info on that truck
Well...
Its white, has hoodpins, is 2wd....
What exactally do you want to know? Cam specs? Suspension setup? What color underware the driver wears when hes driving?
THA_BAD_ONE-0
05-03-06, 01:55 PM
the underwear part for sho cuz when i drive mine i wear the checker flag ones, Besides that what trans, engine mods, cam specs what intake what carb, just more info on the truck does he belong to this site
Powered by vBulletin® Version 4.1.7 Copyright © 2012 vBulletin Solutions, Inc. All rights reserved.