Once again, seems you didnt read anything, I don't remember anyone downing the potential of ls engines. Maybe you could quote the post that did?

 

I don't need to read every word in the posts above to see that what we have is a good old fashioned internet battle over what engine a few guys like more than the others. You seem to know so much about the BBC's that for a while it was like reading your posts that you felt we were all supposed to stop and listen to the expert.... Nobody slammed you or your BBC. Everyone has very different opinions and preferences and some know better how to use them to their advantage to go fast. At no point did anyone but you ask for another board member to pull their head from their asses or to re-read anything - of course I'm sure this is only because none of the "LS guys" are capable of comprehending all thats been said or maaaaybe we all just don't have the most recent "new math" and "ricer" calculators.

Until you know what others do and don't think or understand - why don't you quit insisting everyone read things several times over.... not everyone needs to do so. I certainly don't. Maybe I should quote a post for you? Seriously? Are you an instructor for The Turbo Forums now? I mean it sounds like you have a fair amount of knowledge pertaining to BBC motors, seems legit too. I don't and I do not pretend to but then I'm not preaching about any one motor either....

Have a good night fellas. LOL I'm done . . . gonna go read every other post and assume the rest some more.

 

this thread should be the introduction to the meat spin video cuz there is some serious dick slinging going on here

how about we just agree both motors are capable of making big power and be done with it?

 

without reading the last # posts I feel this statement is

DING DING DING....... WINNER!!!

 

LOL I think most have been in agreement with that . . .

 

Look, no hard feelings. I feel this no different than GM vs Ford vs Mopar vs Foreign. All can be made to perform equally well to an extent. Though this instance is more like the classic Chevy vs Ford as the LS shares more visual and dimensional similarities with a SBF than a SBC

 

I'm currently making the same decision. I have a 72 Monte with a 402. Even with stock parts I could easily fab up a set of headers, mount a S475 and convert to EFI for cheap and make 600hp. The problem I'm having is the car gets a consistent 11-12 mpg stock. Currently I run 87oct but with the turbo I'll need 93oct and with 93 topping $5 here in the Chicago area that will get expensive pretty quick when you put 5000-7000 miles on the car every summer. A good friend of mine just finished an LS swap in a Monte minus the turbo and his car is getting 21 mpg and makes around 380 hp.

We've discussed building various small cube BBC's but for the cost of the 5.3LS motor and the huge increase in mileage they can offer the 5.3 is almost a no brainier for me. I'm going tomorrow to look at a pair of 5.3's. Both from low mileage 1500 silverado's. The guy claims they are complete with all accessory's, harness and computer. Asking price is $350 for one and $450 for the other.

Hard to beat really. I only want around 600HP as the rest of the car is 100% stock and I have no plans on doing too much to change I use the car as a DD during the summer.

 

So... making the switch over also, I thought about it long and hard, I'm parting out my 496 aluminum headed bbc, bunch of good parts. I do have a stock 6.0l lq4 engine on the floor ready for mods. forged pistons, rods but that's about it, I'm looking to get at least 1000hp out of it by fall with some good turbos. My engine builder (building all types of engines) had all the chevy engines sbc, bbc, in his life and is currently using a lsx with twin Precision PT6776H turbos. At first the turbos were on a complete stock 6.0l with stock reused rod bolts and head bolts, yes I said reused TTY bolts, the set up consistently put his 3400 lb truck in the 10.00 sec. in the 1/4 mile on 8 psi, currently using a 427lsx he is now running 8.90's on only 8 psi. I asked if he were to do it again what would it be? he replied, not a bbc but only as a second choice. As a experienced engine builder all he has to do all day while putting engines together is physically see every engines weaknesses. Yes there's issues with pushing water however this issue has been recently improved with better 7 layer mls head gaskets and although its not fully fixed I'm sure in the future it will only be improved. So I just have to take his advice, I'm a bit hesitant because the bbc I had pushed my 2850lb chevy malibu into the 8.90's but I was really stressing the 2 bolt main block (main cap walk), my next step was to get the aftermarket 4 bolt main block and go bigger. After researching the ls1 platform and hearing about 1100+HP on a junkyard 4.8l with over 60 dyno pulls ( thanks car craft), My choice is now the ls motor. I mean hell, if I just replace the motor every year with a fresh junkyard one, its still cheaper than maintaining the old school bbc. I will get to the bottom of this with my own experience, put it this way I'm going to try do it with the money I recover from selling off the used bbc stuff just under $4000.00 and hopefully will see 8.90's out of it again with the 6.0l, I am counting on the weight loss as a helper along with lots of boost, I'm no stranger to fabing, I should be able to stretch my money out pretty far to accomplish my goals. I did just about finish my first ls build for under 3100.00 and that was the complete 4wd s10 blazer, It dose run, I just dont know how fast it is yet. here's a pic
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Nice! ^^^^ What manifolds were those or are they headers?

 

Thanks! I used this kit back when it was $89.99 there galvanized mild steel, I wish they were'nt galvanized cause they may have turned out better. I only have 130.00 In the set, but thats what happens when you have more time than money. http://www.jegs.com/i/JEGS Performance Products/555/31883/10002/-1 I guess I'm not sure how mild steel is going to hold up in the turbo world if I only get a couple years out of them it will be O.K. this projuct was just to get my feet wet with turbo charging.
later I found these on flee bay witch I may use on this next turbo project.http://www.ebay.com/itm/280755295084?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649



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i just read thru this 5-page pi$$ing contest with the apparent winner being a junkyard LS* unless you have a bbc to start with...
i have a BBC and would want to know more about this turbo stuff needed to make it not quite as good as the LS*junkyard stuff.
when the hood is opened the wow-factor of a BBC with or without added hardware is appealing to me...

 

I think part of the reason an LS is so great besides weight is that you can get them super easily. You can practically pick one up at walmart these days, and prices reflect that. Some of these guys pick up a 5.3L for half of what a gen V 454 costs here with peanut port heads. Even the newest BBCs (not an 8100) are about 10 years old now, and even then they weren't stuck into everything like the LS series is.

JMO throw a decent cam in it, mild port on some big ovals if you have em throw something fairly large like an 80-88mm T6 turbo on it and let it rip. Shouldn't have to do a ton more, maybe some rods/pistons if you're feeling frisky. Use a standard Blow through setup and enjoy. Hell, it's not like me where I'm totally bass ackwards and actually putting money into doing something with a Gen 1 SBC. That's probably the worse of the three by a huge margin. Not as good head flow, less durability and less cubes.