no top end power???

[carrerarsr65]

just rebuilt my 3.0sc big port motor 10.5 je pistons 964 cams and weber 40idas,headers 1.5 inch 2in 2out exhaust, the carbs seem to spot on , I was wondering could I have made the wrong cam choice the motor falls on its face around 5k unacceptle the motor is also twin plugged running hpv-1 , should I go up or down on my 3rd dial on the hpv-1 box I think its at +2 right now . any way thanks for any in put, oh ya set it up at 1.27 static time

[Steve@Rennsport]

One really needs a LOT more information in order to offer you anything constructive,... :

Questions:

1) What venturies and jetting do you have?

2) What muffler do you have?

3) Whose headers are you using?

4) What octane fuel?

5) Cam timing spec? (your cams are quite mild!)

6) Precisely,....how much total timing do you have?


Once I have all this, I can offer you some substantive suggestions.

[carrerarsr65]

I'm running 36 vents,155mains ,headers 1.5 ,megaphone style/I also have a 2in 2out dansk ,static time 1.26 for the 964 cam , I think this is where my problem is , I was ill advised on cam choice,26 degrees at 6k . I think I should give DC a call for a more aggressive cam .thanks for your time steve I bought my je piston from you thanks again al from mass

[carrerarsr65]

I think the headers are old h/e with there boxes missing

[Steve@Rennsport]

Hi Al!

Yessir, you need more cam to get a strong pull to 6500-7K.

I like the Webcam 120/104 for setups like yours.