what you choise (6.0 single turbo) or (big block 540 twin turbo) ? - Chevelle Tech
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post #1 of 24 (permalink) Old Mar 26th, 20, 1:21 PM Thread Starter
 
Join Date: Mar 2020
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Question what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

hi guys,
I'm new in this forum
I will start my project soon
(street-strip) +1100 (((on the wheel))))
in the beginning, I'm really confused between going with (twin-turbo 540 big Block) or single LS 6.0
I want to go with big Block but most of the people always against me and they told me (big Block is too heavy for your car ... you will not get what you want ), etc..........
so I do a lot of research about that
And to be honest, I saw both of the engines (boosted).. and they were great
but with big Block always have perfect Torque and really good numbers even with low boost
after a couple of months, I sew A lot of Projects with LS so I Change my mind
because I think is not easy to find all the custom part for Bbc like headers and etc..
after that, I decided to go with LS
so I chose these parts

LS 6.0 forged bottom end
225 AFR cylinder head
Holley sniper intake
single-precision turbo 88
e85
+1100 on the wheel




But before a couple of days, I so Richard Holdener test a new engine from Blueprint Engines
540 bbc Compression ratio

exactly what I'm looking for
Long block and ready for the boost
8.5 Compression ratio
Richard Holdener test this engine with twin S475 on 15.8 PSI
1300 HP on dyno ( i think it will be around 1000 one the wheel )
and I know I can boost this engine more ... easily because the low compression
After I saw this test on the engine I decided to go with a big block ((right now))
I know it's not easy to find the part for Bbc but I think it's worth

so, guys, I need your opinion if you were me, what would your choice and why?


and I hope it will be a nice discussion

thanks so many guys
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post #2 of 24 (permalink) Old Mar 26th, 20, 1:37 PM
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Drew
 
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Location: Toronto Ont Can
Posts: 536
Just supercharge a 6.2Ls.
Toss on some spray.
Easy peasy

Or another popular mod is a twin
Turbo a 5.3LS.




https://youtu.be/sABmL2hB8hY
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post #3 of 24 (permalink) Old Mar 26th, 20, 1:44 PM
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Bob
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

weight matters if you are competing. Weight is not so important for bragging rights on the street. A 540 with a large single or procharger makes as much or more sense as a twin IMO.

Bob
1972 Nova
496 AFR315
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post #4 of 24 (permalink) Old Mar 26th, 20, 2:43 PM
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

What vehicle is this going in?

Tighten it till it strips and back it off a quarter turn.
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post #5 of 24 (permalink) Old Mar 26th, 20, 5:50 PM
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Jarad
 
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Location: Louisville, KY
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Option A- 6.0 make 550 NA add 15psi make 1100.
Option B- 540 make 800 NA add 15psi make 1600.

Personally I'd go with the BBC if the funds are available.

Just theoretical numbers...
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post #6 of 24 (permalink) Old Mar 26th, 20, 6:04 PM
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Jim
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

There was a guy on here that had a 540 TT that put well over 1100rwhp, 70 chevelle, don't know what happened to him. I think he was from Hibbing MN.

Jim

77 Monte
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post #7 of 24 (permalink) Old Mar 26th, 20, 6:25 PM Thread Starter
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

Quote:
Originally Posted by 1sikride View Post
Just supercharge a 6.2Ls.
Toss on some spray.
Easy peasy

Or another popular mod is a twin
Turbo a 5.3LS.




https://youtu.be/sABmL2hB8hY
this is so good
if i go with 6.2
I think i will spend the same amount of money as BBC right?
but if i go with bbc
i will have a different power level with the same price
correct me if I'm wrong
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post #8 of 24 (permalink) Old Mar 26th, 20, 6:30 PM Thread Starter
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

Quote:
Originally Posted by Supernova72 View Post
weight matters if you are competing. Weight is not so important for bragging rights on the street. A 540 with a large single or procharger makes as much or more sense as a twin IMO.
most of the people tell to go with 540 twin-turbo
because of turbo lag and backpressure
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post #9 of 24 (permalink) Old Mar 26th, 20, 6:31 PM Thread Starter
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

Quote:
Originally Posted by Alwhite00 View Post
What vehicle is this going in?
at the moment i will go with my caprice 86 b body
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post #10 of 24 (permalink) Old Mar 26th, 20, 6:37 PM Thread Starter
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

Quote:
Originally Posted by JBoggs View Post
Option A- 6.0 make 550 NA add 15psi make 1100.
Option B- 540 make 800 NA add 15psi make 1600.

Personally I'd go with the BBC if the funds are available.

Just theoretical numbers...
this BBC with 8.5 comparison ratio
650 HP on the dyno
15.8 PSI 1300HP on e85
but with this comparison, I can go more than 20 psi easily
I think it's worth
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post #11 of 24 (permalink) Old Mar 26th, 20, 11:46 PM
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Chris
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

heres some real experience.

most 6.0L making 1000hp or more, especially at the wheels are turning 7000rpm or slightly more with 15psi atleast. more like 20-22psi. boost wont even start until 3500-4000 rpm with a 88mm on street duty.

a 540 BBC will do this horsepower level at 10-12psi and at 5500rpm and paint a torque curve even diesel lovers will be jealous about. don't really need twins do this either.

pretty easy decision.

lots of magazines bragging about +1000hp but most people don't realize what it really takes to get these numbers in a endurance drag motor.

1968 Beaumont
540 BBC + 15psi Boost via Single Garrett GTX
Stock looking, and fairly stock sounding
HP and ET not determined yet!

Boosted Beaumont Build:

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post #12 of 24 (permalink) Old Mar 27th, 20, 8:58 AM
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Rob
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

You really need to assess the intended purpose of the vehicle and be honest with yourself on expectations. Example, if you want a nimble light weight car that can handle twisty turns and accelerate hard out of corners and down straight aways and try to pull some decent gas mileage, then I'd lean towards the LS engine. However, if you want a pro street type vehicle with brute power and unreal acceleration with no regard for gas mileage, then jump on the big block.
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post #13 of 24 (permalink) Old Mar 27th, 20, 9:21 AM
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Rick
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

427 BB twin turbo. Guy down the road has one and is a wicked fast street car. With a turbo, large inches is not always the way to go.


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post #14 of 24 (permalink) Old Mar 27th, 20, 9:32 AM
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Claude
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

I'd definitely go with the LS. Even though I have a BBC in my car (was already there when I bought the car), if something bad happened to it, I'd replace it with a turbocharged LS.

Claude.

1971 Chevelle SS
1987 Buick Grand National 9.48 @ 142 mph
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post #15 of 24 (permalink) Old Mar 27th, 20, 11:43 AM
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mark
 
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Re: what you choise (6.0 single turbo) or (big block 540 twin turbo) ?

If you are worried about the weight of the BBC, do what I did, and get an all aluminum BBC, and do what you want with it.

What is your budget, and is the car already set up to handle the power levels you are talking about?

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