351w build 97 roller
Thread Starter
|
Mountain Pass
Joined: Oct 2012
Posts: 124
Likes: 0
There really doesn't seem to be much out there in the line of low end torque for roller cam applications except for retrofit kits. One of my potentials I'd the crane 444211 cam. Shows 1000-5000 rpm but summit shows 1500-5500. I currently have a few intakes. An 85 h.o. intake, an offy dual port that's currently on eBay, a weiand stealth and an edelbrock performer which will probably go on eBay. I think the weiand will be my best bet. I'm debating on wether to buy a holley 600 or try my autolite 4100 first. I also found a mad 6al box at the junkyard today. Hopefully the best 10$ I ever spent.
Thread Starter
|
Mountain Pass
Joined: Oct 2012
Posts: 124
Likes: 0
By dual pattern you mean efi/carb? Only way I'm going efi is with an aftermarket kit which may happen years down the road but there would be a different cam then. I may pick up a couple and test them out. I really wish you could get some noticeable lump and bottom end. Damn science from letting me live my dreams.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
No, that is when a cam has more lift and duration on the exhaust side than on the intake side, these Fords heads really benefit form it.
Laughing Gas
Joined: Apr 2014
Posts: 884
Likes: 5
From: Shreveport, LA
I'm with Conan, the Comp 35 510-8, XE258HR would be my choice. If you do plan to use the GT40p's it will need crutching on the exhaust thus the dual pattern. Carb applications can get away with 110° lobe seperation but 112° is still good.
If you do decide to get the 185's, it should still work well.
If you do decide to get the 185's, it should still work well.
Laughing Gas
Joined: Apr 2014
Posts: 884
Likes: 5
From: Shreveport, LA
Depending on the pressure, a place called Alex's Parts has some decent kits from what I hear. Ed Curtis, Flowtech Induction has got GT40 drop in kits that are really good quality.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Elder User
Joined: Nov 2009
Posts: 666
Likes: 0
From: Chicago area
Stock OEM HO 5.0 valve springs were good to 6K which is beyond the engines peak power. Unless you plan on running a cam with over .500 inches of lift or spinning it past 6K OEM valve springs should work. The spring that came with the GT40P heads are not as good since the engines were all installed in Explorers and came with cams that didn't make any power above 5K.
Laughing Gas
Joined: Apr 2014
Posts: 884
Likes: 5
From: Shreveport, LA
Stock springs are notoriously weak, not to mention the age on them. Lift and potential RPM aren't the only things that matter in a good valve spring. Roller lobes today are fairly aggressive and neither spring will be able to control them. Especially not the stock GT40P springs. I would NOT run the stock 5.0L springs on any of the cams we've been discussing.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Comp cams always has a recommended spring set for their cams, you don't have to use that exact spring and if it's a dual spring it won't fit without machining anyway, but any single spring that is relatively close will do the job as any spring in this category will be a fair bit stouter than the stock springs. FWIW I ran a Comp XE264HR in my '90 truck 5.0 with the stock E7TE valve springs.. no problems but The motor rarely got north of 4500rpm. I have seen it stated that the valve springs on the GT heads weren't as capable as those on the E7 heads but even if that is true I don't know if there is enough difference in them to be worth talking about.
Laughing Gas
Joined: Apr 2014
Posts: 884
Likes: 5
From: Shreveport, LA
Laughing Gas
Joined: Apr 2014
Posts: 884
Likes: 5
From: Shreveport, LA
Those from FTI, GT40-K1, may be a little much for that cam. However, they can make a good recommendation for seat and open pressure for the right spring kit. I hear a lot of people are satisfied with the Alex's Parts kits.