177 Supercharger on a 400 Pontiac
 

On a mild built street/strip 400 Pontiac, would a 177 be big enough or would it need atleast a 6-71?

How fast you want to go?



GTO George

With a 30 over 455 I’ve went 9.40’s with a 177 on only 3-4 lbs of boost in a 2,800 lb car. Aluminum heads with a roller cam. Could only get 3-4 lbs of boost out of the 177. On steel heads and a smallish hydraulic cam aNd the same 455 I could get 6-9 lbs of boost. I also went 9 teens with a 250 blower.



GTO George

George, what intake did you use to attach that 177 blower to?

The first 177 I bought was a universal set up, it actually bolted to the single four barrel intake. The 250 I had I used a BDS blower intake, the 177 on my wife’s TA I also used a BDS blower intake so I could squeeze it under its hood. I’ll try to get pics later.



GTO George

Do they still sell the one's that bolt to the intake?

GT.

No, it would be nice. The downside was it put the blower up a bit high, using a bds intake I squeezed it under my wife’s TA hood.......thanks to the Dude Scoop!


GTO George

Did you have to make your own adapter?

Yes I did, I used a 5/8” (over kill) piece of a aluminum.


GTO George