Holley rebuild and setup for standard 250

[SLO247 1,713]

I'm about to order a kit and air cleaner to setup the 350 on the xf. Just a standard motor, I'll be doing the usual extractors and exhaust.

 

What jets, power valve and squirter? Tried googling but xfalcon is down and had most of the info.

 

What size air cleaner will fit? 6 3/8 x 2 1/8 OK?

 

I'll be sure to get a kit with reusable bowl gaskets.

 

Any tips or advice for a complete carby noob? I've never had one apart.

[broken-wheel 659]

get a vacuum gauge and use it setup your idle mixture and select the PV or else you will throw money down the exhaust pipe

[SLO247 1,713]

I need a starting point. This is an old carby, I have no idea what's in there. Ill tune it after building and fitting the carb.

[bigpaulo 239]

I think, from memory, i have 60 jets (or there abouts), 8.5 power valve, and a 38 squirter. I think...

I remember when changing the power valve i also bent a thin guitar string into the powervalve holes in the metering block. Acts as a restrictor and i found my car definitely ran better with it in there. Stock apart from carby and exhaust.

[Nath 1,975]

I'm about to order a kit and air cleaner to setup the 350 on the xf. Just a standard motor, I'll be doing the usual extractors and exhaust.

 

 

Any tips or advice for a complete carby noob? I've never had one apart.

Nice to see you've joined the darkside.

[SLO247 1,713]

I think, from memory, i have 60 jets (or there abouts), 8.5 power valve, and a 38 squirter. I think...

I remember when changing the power valve i also bent a thin guitar string into the powervalve holes in the metering block. Acts as a restrictor and i found my car definitely ran better with it in there. Stock apart from carby and exhaust.

Perfect, thanks.

[gerg 10,871]

The correct air cleaner is the biggest you can fit. I reckon that size you quoted is pretty small. Try around 10" if you can fit it, or an oval type.

 

That Holley tune sounds fairly close to stock, which is a great place to start but you need to see what list number you have before settling on a tune or playing with bits of wire in the PVCRs. The info is easy to find in a search.

[SLO247 1,713]

7448. I'll find a bigger filter then, thanks.

[SLO247 1,713]

Will a 9x2 fit?

[gerg 10,871]

One way to find out i guess! Probably won't be a problem if it's a drop-base type. 7448 lists as having 61 jets but from memory they have very large PVCRs (dunno exactly) hence bigpaulo's trick of downsizing with guitar strings shoved in. 38 squirters are huge for an engine that size, I'd try the stock 28s first.

[thunderbolt 150]

if your carful peen the PV restrictions smaller with a nail punch and re drill them 25 thou

 

9x2 aircleaner will fit if its on a redline manifold

14x2 will fit if ya cut away some of the frame uner the bonnet

[SLO247 1,713]

28 it is. 9x2 it is. Will find a drop base. Awesome help thanks.

[SLO247 1,713]

After some eBay trolling it looks like a 9x2 drop base is a rare thing.

 

I'll see what jets etc are in it first.

[bear351c 10,270]

Good shit, guys.

[thunderbolt 150]

dosen't need drop base

[SLO247 1,713]

For either a 9 or a 14?

[thunderbolt 150]

for the 9x2 and a 14 inch drop base will hit the shock tower. A14x2 fat base only fits if the frame for the bonnet is cut

if you have a mig welder modify a stcock air cleaner