Ls3 with a holley 750 HP on the street

  • Thread starter LsxBuickRegal1982
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LsxBuickRegal1982

LsxBuickRegal1982

Apprentice
Nov 9, 2018
93
32
18
#1
I have a Chevy performance CT525 crate engine with a holley 750Hp double pumper and a howards cam for a weekend street driven ls swap 82 regal and I was wondering would this carb be too much on the street I am running a GM single plane intake and a Howards cam.
 

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TURNA

TURNA

Geezer
Jul 24, 2009
7,246
9,654
113
Socialist NY
#2
What trans?

Chevy recommends a 650 for that engine but tested it with a 750.

So the Dyno numbers on the sheet used a 750 Holley
 
LsxBuickRegal1982

LsxBuickRegal1982

Apprentice
Nov 9, 2018
93
32
18
#3
Th400 with a 3000 stall and a 3.73 posi rear end with 275/60/R15 drag radial
 
TURNA

TURNA

Geezer
Jul 24, 2009
7,246
9,654
113
Socialist NY
#4
A basic rule is vacuum secondary's with an auto

Mechanical with a manual

But that said I usually use a mechanical secondary carb
 
B

bracketchev1221

Master Mechanic
Jan 18, 2018
390
351
43
#5
You'll be fine with the 750. It has enough gear and converter to help get it going.
 
vanrah

vanrah

G-Body Guru
Apr 16, 2013
744
795
93
Near Afton, Wisconsin
#6
Greetings LSx82 & all; I really like the cam ya picked & the intake. With that carb you may find ya got a little flat spot going full on from a slow roll. But like Bracket Chevy & Turna said you'll be fine for an all out on the converter start. Good Luck & if ya got carb questions just ask us guys, Ole' Bopb
 
LsxBuickRegal1982

LsxBuickRegal1982

Apprentice
Nov 9, 2018
93
32
18
#7
Thank you for all the insight I hope I can get this thing tuned cause I prefer a carb over efi any day
 
motorheadmike

motorheadmike

Comic Book Super Hero
Nov 18, 2009
3,656
7,099
113
Ottawa, Ontario Canada
#8
Injectedcutty

Injectedcutty

Comic Book Super Hero
Nov 24, 2014
3,431
8,399
113
Louisville, KY
#9
Carbed LS isn't bad, but so much more efficiency, power, tunability is on the table with EFI. Not to mention, some EFI setups look wicked :sneaky:;)!!!
20181125_124621-jpg.100873
 
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