.

 

Going the carb way is cheaper but sometimes it is hard to get your adapter to fit under the hood and also hooking up your EGR. May take a few extra custom mods there. The Holley manifols is probably the best because it has 2" bores, flows extremely well and retains all of your old hook-ups. The only thing with that manifold is converting to an older style EGR. The Edebrock is literally a direct bolt on and everything fits onto it no problem. I have heard that it is the same desing as their performer intakes which flow really well. However, this manifold is plagued with the small stock ores that don't allow you to use a larger TBI unit down the road like the Carb and holley intakes do. I am going to be a guiea pig this winter break and attempt to have the bores enlarged in my TBI intake (I have the edlebrock one).

 

The Edelbrock performer TBI is a direct bolt on, no problems at all there! The Edelbrock Performer Carb (3706) flows much better, but you're going to run into a few problems installing it, but nothing major.

 

shifty ??? why did holley develop theirs with a 2.00 inch bore? was that a 454 truck application? i assume edeldrock is a 1 11/16 due to it being designed/ used for f body replacement 305 cid. if so, is the intake port manifold runner to head intake port a better match with holley if we use a high perf head(like me) that has a larger port??? i was sold on edelbrock but now i am thinking may not flow enough as compared to holley ???

 

If the edelbrock intake had 2" bores I bet it would flow about the same as the Holley. Since Edelbrock wanted the TBI intake to be a direct bolt on they kept the stock size TBI bores that are found on 305's and 350's. I doubt they imagined people would build TBI's enough to need anyhting larger than the stock unit. My guess is that since Holley makes the 670 TBI along with a whole bunch of other set-ups (4bbl) that have 2" bores it was a way for people to have to buy their intake if they want to run that big of a unit. It is a smart move and makes a lot of sense. The Edelbrock intake is made the exact same as Edelbrock's other performer carb intakes which can support gobs of power. It is restricted though because of the stock bore sizes whereas a carb intake has no real restriction up top. I am going to be boring my Edelbrock intake up to 2" in the next couple of days. I may screw it up because I geuss there are some water passages that are too close to the bores. I may botch it up completey but I have the stock intake to fall back on if I fail. I am going to be the guinea pig on this but I think it can help out a lot of people on this board.

 

https://www.thirdgen.org/techbb2/sho...hreadid=214533

read that post it has a lot of interesting stuff about intakes. particularly single plane.

IMHO single planes are the way to go w/ TBI. I'll be swapping to one later this year, k, later 2004.

If you're going for easy replacement, edelbrock sounds good. if you're going for more power in the future and want carb, i'd suggest single plane, from all i've read its all good no bad.

-chuck