TT bbc or TT Ls
Thread Starter
Staging Lane
Joined: May 2009
Posts: 65
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TT bbc or TT Ls I have a 71 chevelle project that i had to put on hold, but i want to start back on it after the holidays. The car will be mostly street with grudge racing from time to time at the track. Im looking to make between 900-1100 max hp. what route should i go with and what size turbos should i look into?
At 900-1100 max hp, the LS will not be at a cost disadvantage, and will have a weight advantage over the BBC. Seems like a no-brainer. When you start going higher, the cost/benefit shifts more toward the BBC the higher your power goals are.
Mostly street driven with some grudge stuff added, is the goal something with decent mpg that's wicked fast or does fuel milage not matter, if only driven locally it won't be an issue, if you want to drive this beast, the LS motor wins hands down, many setups have been done with great success and your power goals are very easily reached with power in reserve, you could go Turbo or Centrifugal SC and have a lot of fun! BBC has some benefits when having strength in reserve and power, yet when boosted the low end will be difficult to get hooked on the street.. yet both will have their advantages.
Enjoy whatever you decide!
Enjoy whatever you decide!
Go 370ci or a 390ci like mine. Fully forged bottom end. Some will say use the stock crank, but why......you can get a Callies 3.825" crank cheap. Thats what I used in my 390ci.. I wanted a little more cubes to spin the turbo faster. But to each his own on that thought process....
Get a resleeved aluminum LS3 (expensive) I think resleeving alone is about $1,600. Or just get an iron LQ9 block very cheap in the few hundred $$$ range.
But man, a bigger muscle car like that....I would go BBC with a centrifugal supercharger.
Find a cheap iron 454ci truck block and make a 496ci out of it.
Torque from a BBC is badass compared to a SBC.
I don't see how its possible to make a 1,000 HP reliable set up in an LS engine for the same as you can make a 1,000 HP BBC set up that will last a very very long time.
But maybe with a stock crank, forged pistons and rods.....iron LQ9 block.....370ci.....inexpensive heads, LS6 intake and TB. You can get close to that cost.
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Thread Starter
Staging Lane
Joined: May 2009
Posts: 65
Likes: 0
If you already have the big block, it's really a lot cheaper to that way.
Blow through carb, no IC and E85.
In a Chevelle, I'd add an IC.
I've two buddies who went that way.
First is a 540 68 Camaro, single monster turbo, massive IC, blow through carb. Best of 8.10@172.
The other is a 69 Nova. Twin S475's, blow through carb, best of 8.50@169. Only has a few runs on it.
Pretty easy HP
Myself, I could have added a turbo to the old 496 and scared the crap out of myself. But I wanted the LS turbo challenge, learning the efi etc.
one thing I will say. Although my buddies cars are both street cars, at an estimated 5mpg......on a good day......you really can't drive them anywhere........
Ron
Blow through carb, no IC and E85.
In a Chevelle, I'd add an IC.
I've two buddies who went that way.
First is a 540 68 Camaro, single monster turbo, massive IC, blow through carb. Best of 8.10@172.
The other is a 69 Nova. Twin S475's, blow through carb, best of 8.50@169. Only has a few runs on it.
Pretty easy HP
Myself, I could have added a turbo to the old 496 and scared the crap out of myself. But I wanted the LS turbo challenge, learning the efi etc.
one thing I will say. Although my buddies cars are both street cars, at an estimated 5mpg......on a good day......you really can't drive them anywhere........
Ron
Of course.
But plan to spend a ton of money to get 1,000+ HP out of any LS set up.
BBC can be done so damn cheap with a junkyard truck block and heads. And a supercharger. And you get the raw power the supercharged engine gives, like a normally aspirated engine. No turbo lag to deal with.
My 1,000+ RWHP LS set up all installed and tuned, the best I can estimate, but there's always extra **** that comes up.....will be right at $17,000, including my 390ci iron block LQ9 with a fully forged bottom end, Stage 4 4L80E tranny which is a must do with 1,000+ HP....and all labor to install the kit, tranny and tuning.
BBC + sc'er....nowhere near that much. I looked into this years ago because I was gonna put a Normally Aspirated 800 HP BBC in my 1998 F-Body till I found out how much fabbing and labor it would take.
What tranny you going with?
.
But plan to spend a ton of money to get 1,000+ HP out of any LS set up.
BBC can be done so damn cheap with a junkyard truck block and heads. And a supercharger. And you get the raw power the supercharged engine gives, like a normally aspirated engine. No turbo lag to deal with.
My 1,000+ RWHP LS set up all installed and tuned, the best I can estimate, but there's always extra **** that comes up.....will be right at $17,000, including my 390ci iron block LQ9 with a fully forged bottom end, Stage 4 4L80E tranny which is a must do with 1,000+ HP....and all labor to install the kit, tranny and tuning.
BBC + sc'er....nowhere near that much. I looked into this years ago because I was gonna put a Normally Aspirated 800 HP BBC in my 1998 F-Body till I found out how much fabbing and labor it would take.
What tranny you going with?
.
Last edited by LS6427; Dec 24, 2017 at 03:38 PM.
$14,000 + intake a some other stuff. Normally Aspirated 1250 HP. Raw power....and massive torque.
This is exactly what I would buy if I had an older muscle car. Stage II 1,250 HP.
http://www.shafiroff.com/chevy-power...g-block-sc.php
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This is exactly what I would buy if I had an older muscle car. Stage II 1,250 HP.
http://www.shafiroff.com/chevy-power...g-block-sc.php
.
Originally Posted by LS6427
Of course.
But plan to spend a ton of money to get 1,000+ HP out of any LS set up.
BBC can be done so damn cheap with a junkyard truck block and heads. And a supercharger. And you get the raw power the supercharged engine gives, like a normally aspirated engine. No turbo lag to deal with.
My 1,000+ RWHP LS set up all installed and tuned, the best I can estimate, but there's always extra **** that comes up.....will be right at $17,000, including my 390ci iron block LQ9 with a fully forged bottom end, Stage 4 4L80E tranny which is a must do with 1,000+ HP....and all labor to install the kit, tranny and tuning.
BBC + sc'er....nowhere near that much. I looked into this years ago because I was gonna put a Normally Aspirated 800 HP BBC in my 1998 F-Body till I found out how much fabbing and labor it would take.
What tranny you going with?
.
But plan to spend a ton of money to get 1,000+ HP out of any LS set up.
BBC can be done so damn cheap with a junkyard truck block and heads. And a supercharger. And you get the raw power the supercharged engine gives, like a normally aspirated engine. No turbo lag to deal with.
My 1,000+ RWHP LS set up all installed and tuned, the best I can estimate, but there's always extra **** that comes up.....will be right at $17,000, including my 390ci iron block LQ9 with a fully forged bottom end, Stage 4 4L80E tranny which is a must do with 1,000+ HP....and all labor to install the kit, tranny and tuning.
BBC + sc'er....nowhere near that much. I looked into this years ago because I was gonna put a Normally Aspirated 800 HP BBC in my 1998 F-Body till I found out how much fabbing and labor it would take.
What tranny you going with?
.
You get my meaning I believe.....
A SC'ed car cruising at 50mph and smacks the pedal to the floor, its instant red line and power.
A Turbo car cruising at 50mph and smacks the pedal to the floor.....every one of them has a period of time for the turbo to spool and then the power comes in.....it IS NOT instant like a SC'ed car or a normally aspirated car and the turbo engine is not smooth all the way through the power curve until its fully spooled.
And I have a turbo kit going in just because I want a lot of power that a SC'er cannot offer unless I want to listen to that mind-crippling F1 screaming 1 million decibels all the time and no A/C.
I hope that "lag" that "all" turbo engines have is minimized as much as possible. Thats the goal of all turbo set ups.
I just think turbo people hate hearing that word "lag", as if its talking bad about turbos. Its just a fact of turbos......
.
A SC'ed car cruising at 50mph and smacks the pedal to the floor, its instant red line and power.
A Turbo car cruising at 50mph and smacks the pedal to the floor.....every one of them has a period of time for the turbo to spool and then the power comes in.....it IS NOT instant like a SC'ed car or a normally aspirated car and the turbo engine is not smooth all the way through the power curve until its fully spooled.
And I have a turbo kit going in just because I want a lot of power that a SC'er cannot offer unless I want to listen to that mind-crippling F1 screaming 1 million decibels all the time and no A/C.
I hope that "lag" that "all" turbo engines have is minimized as much as possible. Thats the goal of all turbo set ups.
I just think turbo people hate hearing that word "lag", as if its talking bad about turbos. Its just a fact of turbos......
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