Does a small block with a roots style blower need premium fuel?
08-27-2019, 02:56 PM
#2
Registered
iTrader: (1)
Any more info ? 
That being said, big chances are no, it should use premium.
But that answer has as much info as the opening post.
That being said, big chances are no, it should use premium.
But that answer has as much info as the opening post.
08-27-2019, 06:01 PM
#4
Registered
iTrader: (3)
Thats like asking if you always need an umbrella when its cloudy out.
if your static compression is 7.5:1 and your running 3 psi of boost with an intercooler and aluminum heads...no
If your static compression is 9:1 and your running 7 psi of boost, the answer is yes
If your somewhere in between, you need to break out the slide rule.
if your static compression is 7.5:1 and your running 3 psi of boost with an intercooler and aluminum heads...no
If your static compression is 9:1 and your running 7 psi of boost, the answer is yes
If your somewhere in between, you need to break out the slide rule.
08-27-2019, 06:37 PM
#6
Registered
I wouldn't run 87. Gas is cheaper than a rebuild.
08-27-2019, 07:04 PM
#7
Registered
Thread Starter
Thats like asking if you always need an umbrella when its cloudy out.
if your static compression is 7.5:1 and your running 3 psi of boost with an intercooler and aluminum heads...no
If your static compression is 9:1 and your running 7 psi of boost, the answer is yes
If your somewhere in between, you need to break out the slide rule.
if your static compression is 7.5:1 and your running 3 psi of boost with an intercooler and aluminum heads...no
If your static compression is 9:1 and your running 7 psi of boost, the answer is yes
If your somewhere in between, you need to break out the slide rule.
thank you you for the informative answer, that answers my questions.
08-27-2019, 07:17 PM
#8
Charter Member # 55
Charter Member
Skip down to effective comp ratio. You can run about 9.0 CR on 87 octane.
https://documents.holley.com/techlib..._tech_info.pdf
https://documents.holley.com/techlib..._tech_info.pdf
