proform 750

[aaronk785]

Have a question about a preform 750 I bought awhile back. I opened it up to jet down a bit and noticed that it had screw in afr there are 6 other tapped holes in each metering block with nothing in them. 3 on each side. Is this normal and is this for further tuning. Or did they forget them at the factory?

 

[yellow rose]

Those are emulsion bleeds. Your plates only have 3? Most of the Pro Form blocks I've seen have 4 per Venturi.

If you want to run the emulsion they have you can run that. IIRC, those blocks have a .028 hole in them. I usually start with a .028 hole in the 1 and 3 hole from the top and block 2 and 4. But it depends on how much air bleed you have and jet sizes etc.

 

[aaronk785]

Thank you.