Well I came across a deal I couldn't pass up and pulled the trigger. I bought a FRPP 306 crate engine rated at 340hp. I really wanted another 347, but this was a good deal.

My question is Edelbrock or Holley. FRPP Tech suggests a Edelbrock RPM air Gap with a 600 or 650 Holley. Tech guy (Seemed really knowledgeable and helpful) thought I would make more power with a Holley at higher RPM's than a Edelbrock. What is everyone's thought on this and 600 or 650?

Prior to the conversation, I was thinking of going with the Edelbrock 600 or part #1405 with the #1478 electric choke conversion.

Also mechanical or electric fuel pump?

Thanks

 

Edelbrock Victor Jr intake with like a 600-650 Quick Fuel (I think they have the best bang/buck street carbs). Especially if you run an annular booster QFT, signal will not be an issue with a Vic. Jr.

And before someone bitches...and I know they will....I've come to the point where I prefer single planes on performance engines because they already make a ton of bottom end torque (way more than you can hook), and single planes have WAY better fuel distribution/balance.

 

id go edlebrock intake and holley carb its a great combo and if ford techs say that combo id trust their input!

 

Probably won't go with the Victor jr as FRPP lists the redline at 5800rpm. So i'm pretty set on the RPM Air Gap. But open on the carb brand, CFM and mechanical or electric fuel pump. I'd like as much power as possible (doesn't everyone), but driveability is most important.

 

So what? I've seen Vic. Jr. combos that make retarded peak power in 302's at 6K and under.

If you have some gear in the car, it'll be fine. Even if you lose 20-30lb-ft at low rpm it will still blow the tires off. I got rid of the RPM Air Gap on my 331 because 1st gear is useless on the street by 1/4 throttle. And that's with taller gearing than most. And a 1,000cfm throttle (EFI).

Single planes have WAY better cylinder distribution. I wouldn't run one on a stock headed engine, but they're fine on a built engine with some gear in the car.

My carb preference is Quick Fuel. They have a lot of carbs for street use with great performance options for a fair price. Mech. 2nd actually runs better with manuals or high stall autos, better fuel distribution and with 1:1 linkage a ton of throttle response.

Also, I'd change the cam before you dropped it in. The heads are ok, but the cam in the Ford crate engines really hold them back. It's probably costing you at least 40-50hp.

 

I prefer edelbrock ....and the majority of street cars have carbs that are oversized for the RPM range. I would question even a 600cfm with that displacement unles the VE is extroidanary.

Find an on line cfm calculator and check it yourself, Internet opinions are often like stories you hear at the bar.

 

The problem is most of the decent carbs are 650cfm or bigger. These days most everything that's smaller than 650 is likely to have ****ty metering blocks and boosters (Holley type). Edelbrocks are simple and reliable carbs, but they're just the old Carter AFB design and have been outdated for many years; they tend to make noticeably less power than a good Holley, but are much simpler.

As far as fuel pump, that's up to you. But I dunno if the Ford alphabet crate engines have the eccentric for a mechanical. Electric is fine, plumb a return style system/regulator and follow the guidelines for pump placement etc. At least with an electric you have a prime, in case you take the carb apart to tune it, or fuel evaporates from the bowl.

 

Yes my carter AFB with mech 2nds made significantly less power than my holley street avenger 670...That said I am almost certian that I am going to try out a QFT hot rod 600 with mech 2nds because it does indeed seem like the best carb out there!

-Gun

 

Lots of different directions to go. Thanks for the replys thus far.

 

Yeah, unlike in the past, there is a vast number of options these days. The hardest part in the past was simply finding a part....now the hardest part is choosing which one to use.