Numbers for porting a 390 or J Red 2188

[Mastermind]

I've never denied that.

 

[tree monkey]

 

[Gypo Logger]

If the 390 is anything like the 385, I used:
Intake 147 66.5 mm
Ex 168 24 mm
Tr 130 29mm
These are Ken Dun figures.

 

[David Young]

If the 390 is anything like the 385, I used:
Intake 147 66.5 mm
Ex 168 24 mm
Tr 130 29mm
These are Ken Dun figures.

Wow betcha shed get down.

 

[tree monkey]

what carb?

 

[Gypo Logger]

what carb?

Pretty sure it was the stock Walbro and not a Tilly. I think the 390 had the tilly which may work good on the 385.