If I bolt an Edelbrock 289 Performer intake paired with an Edelbrock 1406 on a stock 302 with factory exhaust manifold, will I damage anything? Can the engine handle that setup? Thanks

 

Yep no problem. ..But to maximize the benefits ya oughtta really ditch those cast iron manifolds and install headers... yer leaving HP and TQ on the table.

 

That's what I was thinking! Thank you. When having an exhaust installed, do you install the headers yourself and then drive to an exhaust place, or do they do it all for you?

 

Don't ask HIO that question. LOL
That's what most of us do. Now, if you have fab skills and the tools and equipment to do it, by all means. Get after it.

 

Haha... Very funny Teach!

Atypical of other Ferrari owners, I do 98 percent of my fabbing and wrenching.

For urban and suburbanites, the typical course of action is to install the headers yourself and then have the vehicle delivered (towed/rollback) to a muffler shop for finishing.

Alternatively, deliver the vehicle to a shop that will do all the work. Of course the total cost will be commensurate with the services rendered.

 

2X on the headers. In it's most basic form an engine is an air pump. AIR/fuel goes in and exhaust air comes out. If one of those two avenues is choked off a bit then the engine can't perform up to it's potential. What goes in has to be able to come out just as easily.

 

The worst part about headers is getting a set that FITS and SEALS well. A set of shorties would do well in your application. If headers are a bit much to deal with, a nice dual exhaust using your manifolds would at least help.

Is your truck an automatic or stick? Automatic being a bit easier since you don't have to work around a clutch linkage.

 

"Shorties"
Do Galaxie hearers do well in these 390 bumps? I haven't seen anyone with that set up yet.

 

I know the long tube Galaxie cast iron headers will not clear. I have a set on my '64 Galaxie and I kinda mocked them up to compare. They would run into the crossmember under the bellhousing.

Shorties? Not sure actually. They might? The factory cast irons would get pricey. I know the long tube goes north of $500 for a pair of decent ones.

Something like Sanderson shorties? I know I have seen mention of them before, but have no real first hand knowledge.

 

Shorty headers on a 302 is the way to go. I have long tubes and they are too close to the cross member. They fit but the collector flange is tough to get not to hit the cross member.

 

Maybe Jeff can have some input on this, but if it is for a 302, what about going to the PnP and getting the ones off of a 1998 to 2002 Explorer?

 

The 2/1/98 to 2002 Explorer 302's had the GT40P heads. Which had the spark plugs pointing straight out like a SBC. So they had different factory shortie headers. 97-2/1/98 had GT40 heads with angled plugs like any other SBF. I have seen on here guys with Bump 351W transplants having to use Fox Chassis Mustang 302 shorties. Seems like the last 2 both went with BBK.


I think you are going to blaze the trail for the Explorer shorties Dave.


BBK Performance 1515 - BBK Shorty Headers



Headers, Shorty, Steel, Chrome, Ford, 5.0L, Pair
(16)
Part Number: BBK-1515 More Detail...
Estimated Ship Date: Today


$199.99








BBK Performance 15150 - BBK Shorty Headers


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Headers, Shorty, Steel, Ceramic Coated, Ford, 5.0L, Pair
(8)
Part Number: BBK-15150 More Detail...
Estimated Ship Date: Today

$299.99

 

My truck is an Auto, I was looking at the cheapish Stainless long tube tri-y headers. I like the fact that they're stainless. I've read that long tube tri-y's are good for torque.

 

And think about this. That $500 will buy you some 15Hp at 6000RPMS!
Wow! What a deal! That amounts to almost 0Hp gain in the RPM range that one usually drives in. But that is just information gleaned from the advertising done by Hooker and Hedman. They *used* to provide a graph showing the Hp and Tq gains.
The Galaxie cast headers will require notching the frame and then welding in some support to reinforce where you cut it. It can be done.
I took my '62 Galaxie 406 short cast headers and bolted them onto the 428 in my truck. I decided that I didn't want to do all of the work required for them. The exhaust tubing could easily be routed away from the crossmember though. Now I'm looking for the Mustang 428CJ cast headers.

 

From '95 to 2/1/98, the Explorer 5.0L engines had GT40 (3-bar) heads. These are very good heads (basically the heads that were used on the '93-'95 Cobra 5.0L engines) and have the conventional plug angle that the common 302/5.0L heads have --as opposed to the much less angled plugs of the GT40P Explorer (4-bar) heads.

However, I would not recommend the use of any factory Mustang or Explorer GT40 5.0L factory shorty headers. They have too many crimps in them to be really free-flowing (tubing is not mandrel bent).

Mac or especially JBA headers would be a vast improvement, if you want to install free-flowing mandrel bent shorties.