Drag Racing Discussions > Drag Racing

New to supercharging, need some pointers

<< < (3/6) > >>

Supercat:
Copper head gaskets.

Draw 3D:
My little SBC has 11.5:1 compression ratio and in my opinion, if you start with low compression, you're going to have to spin the blower much faster and at a certain point, it will become the less efficient, and, the intake air will get heated more and that's not what you want to do.

dreracecar:

--- Quote from: Draw 3D on August 03, 2019, 07:52:37 AM ---My little SBC has 11.5:1 compression ratio and in my opinion, if you start with low compression, you're going to have to spin the blower much faster and at a certain point, it will become the less efficient, and, the intake air will get heated more and that's not what you want to do.

--- End quote ---


   All blowers have a maximum boost they obtain till they start to cavitate, they are not linear and boost does not increase the more OD/rpms you give it.  Blower OD is to regulate when full boost is achived  say 5 over comes in at 60' while 25 over- 10' but on both runs saw a max boost of 22#

  Lower static lets the motor work easier from the start and then power on once the car gets rolling and has the rpm to handle the increased load the blower provides. Higher static puts more load on the drivetrain at the hit.
  But as Glenn mentioned-- find out which way works for you, I run what works for me and haven't change the basic combo in 24 years

  Alc maintains a 64* cooling charge into the intake port, If you are running gas then the intake charge must be cooled

Draw 3D:

--- Quote from: dreracecar on August 03, 2019, 08:57:32 AM ---Alc maintains a 64* cooling charge into the intake port
--- End quote ---
Don't think that is correct, temp at the intake port would be determined by amount of pressure and amount of air compressed mixed with the alcohol.

dreracecar:
Then why is it the my Intake manifold is cold after a run???

Navigation

[0] Message Index

[#] Next page

[*] Previous page