I was wondering if anyone has actually used the weiand stealth intake for a 390? I am looking towards a 400+ HP buildup in a couple months and I am debating on the two manifolds. The stealth is a single plane but not very high and claims to get power from idle to 6000 rpm. The performer RPM is a taller dual plane manifold. The stealth is cheaper but not enough to make the decision for me. Desktop dyno produced higher top end and equal mid range power with the single plain selected. It says that I will get 450hp with the parts I'm using but I think that's a little optimistic. I will be using a .554 lift 230 duration at .050 cam with a 750 holley single pumper, 10:1 pistons, port matched heads with a 3 angle valve job, headers and accel distributor. I would like to go with a dual pattern cam but the kit doesn't give me that choice. Also I would like to know if anyone knows where to find some really strong aftermarket rods. PAW's stage II seem to be stock rods that just got a good looking over and shot peened and magnafluxed. I want to feel safe at 6,000 rpm. I know stock rods are pretty good but I don't want to ruin my investment because of a short cut. My truck is a 1970 and I want this truck to be somewhat streetable so I'll play with the TC and rear end when I figure out how this beast is going to act.
Rat, I do believe you should go with the RPM. I don't see much use for single plane unless you are a pro drag racer, especially in a truck. Even my 427 has a dual plane intake, double 4 barrel, but it is dual plane not a tunnel ram. I would agree that desktop is optimistic somewhat. Have you considered running the 1.65 exhaust from the 428CJ? The 390 really needs the help on the outflow, some guy on Ebay has been selling new sets of valves at a good price. Accel distributer?!! Don't do it! The duraspark is really the best for your ford V8, and less exspensive too. Go to a parts store and get a rebuilt for a 76 390, you can hook it to a 5 wire dodge control box for less than 50$, simpler and cheaper than the duraspark brainbox. DF
rat, your stock rods are fine all the way to at least 6500. The scary parts are the stock rod bolts. About as strong as a wet noodle. Replace them with ARPs or something similar. DF
Definitely will have the best rods. Going with the ARP chrome Moly. That's one area where I'm reallly taking no short cuts. I will be racing against my buddies and whoever else probably once a month. I live on an Air Force Base and drive a mile to work with a gas station in between so as long as I can keep it under 25mph without riding the brakes I will be fine. Do you still think that the weiand will be a little too racy? This isn't my only mode of transportation. Those valves look like a pretty good deal. I thought I already has 1.65 exaust but I'm probably wrong. Either way I will when I get done. Are 2.19 valves possible in my stock heads?
2.19 will work for the bore, but probably not the heads(I know someone who runs 427 low riser heads on a 352!), but aren't practical anyways, 2.09 would be better, also just because a intake is single plane doesn't mean it is high RPM, look at the streetmaster, it's good to what 4500 RPM give or take depending on engine size? It was a small runner single plane, just because a intake is single plane means very little sometimes, you need to check the runner size to get a better idea of which intake would be better. for a truck between the two intakes I'd pick the smaller as long as it's still close to the size of your intake ports on the heads.
I heard the stealth is not a new design and not like other stealths. I heard it was bought from some other company and they just used the same old design. The Performer RPM is a newer design and a great intake. As for DP cam, I'd get one. Some FE cams are just chevy cuts on a Ford cam, while others actually look at the design of the FE engine and design a cam for it. Crower makes some of the best.
well, The 390 I built for my '67 F-250 is along the lines that you want. In the quarter mile it pulls 15.1's, no joke, I have the time slips to prove it. With this motor in a half ton, it should pull 13's no prob. The motor is just a standard block out of a '72 F-250. I'm using the stock rods and crank. I did use the ARP rod and main bolts without a second thought. I have 9.5:1 sterling hyperutectic pistons and I don't remember what brand of rings but they are file to fit. The heads are C83A casting heads (standard truck) but I ported and polished to 428SCJ specs. The cam is a Comp. Cam, part number FB 282S-10, its a mechanical cam with .571 lift on intake and exhaust and 236 degrees of duration at .050, it has a slight lope and it doesn't bother me. For an intake I'm using a 428 S code, but the Edel. RPM manifold is the same. For carb I have a 750 holley vac. secondary and hedman headers. And a mallory dual point distrubutor. I'm probably pushing over 400 horse with no problems, and I now have over 15,000 miles on it without a problem. Good luck with your motor!!
nitrous, are you telling us that you can't get more than 5500? Get new valve springs! I've had no trouble spinning 6700, although the power seems to stop building at 6250. I run the springs that Crane said go with this cam, some duals with 125# seat pressure and 450 over the nose at .600 lift. Get yourself a new cam and springs! From Crane or CamDynamics, Comp does not know how to make Ford parts, especially for FEs. DF
Nitrous your engine should be able to spin past 5500 unless the manifold is holding it back the HP calculator at http://www.fordmuscle.com/calculators/horsepower.html says that if you only get 15.1's and are at 4500lbs, your flywheel horsepower is around 280hp but the trap speed gives a much better estimate of horsepower and I wouldn't really trust that HP, I'd say your more like 350...
>The cam
>is a Comp. Cam, part
>number FB 282S-10, its a
>mechanical cam with .571 lift
>on intake and exhaust and
>236 degrees of duration at
>.050, it has a slight
>lope and it doesn't bother
>me.
How do you like that cam? I am thinking of running it in my 410, does it pull hard all the way throught he RPM band? how often do you need to change the lash on it?
>For an intake I'm
>using a 428 S code,
>but the Edel. RPM manifold
>is the same.
The Edelbrock Performer is the same as the S code, the RPM is a better manifold than a S code.
Do yuo have a problem with wheelhop? I do really bad and I'm trying to think of a way to cure it without doing a flip kit to run caltracs yet
Nitrous, I would have to guess that something is holding you back. Is your engine out of breath ? I run a ford power parts 4267-B intake, I think it was made by blue thunder. It is taller than an RPM performer and the passages are bigger, with a heavy taper to the runners. The center divider between the two planes has been cut down about 2 inches. My heads are C8AE that have been ported and the big 2.09 and 1.65 valves have been added.The cam is from CamDynamics, with 238* in and 248* at 050, lift is just over .600. I would not run a single pattern cam in an FE. The ignition is duraspark with Jacobs computer control. Are you running up against weak valve springs? The heavy 3/8s valves in the FE need plenty of spring pressure! I am running Crane duals that are intended for a big solid cam. The engine also has Rhoads hi-bleed lifters (very noisy!). The oiling system has been done and oil was restricted to the lifters with a pipe plug drilled to .100 to prevent lifter pump up. Idle is choppy but liveable. I would not want to spend all day at 6250, but getting there for shifts is not a problem. Arp main studs and rod bolts were used for some peace of mind. DF
Fe427 and dino....come to think of it, my manifold is probably holding me back. All I did to the manifold is port matched. I'll check in about getting another manifold, my friend has a Sindwinder that he'll let me buy, that should help me out right? And my truck isn't weighing at 45 its actually about 4900 with me in it. I still have the belly tank underneath it and my dad has a real heavy step bumper. The times and the truck isnt' very consistent. The 15.1 I pulled is with a little bit of tire spin but alot of VHT on the truck. I normally pull 15.3 and spin the right rear (sometimes both) through the 60 footer. I do not have a posi. I do like the cam, but I don't recommed it for a "heavy" truck. I think I'll like it better when I get this motor in my '59 Half-ton and actual get a stall converter for it like it said I should of. I ajust them about 10,000 miles. I don't have alot of wheel hop. I just flat out smoke the tires till 25 or 30 mph then she starts to. I don't have traction bars or anything. Just the camper special 8 leafs out back.for tires I have the 9.50-16.5, they are roughly 31 inches tall. I did restrict the top end for oil, and I am running dual springs, I dont' recall the the pressures for them, but they are quite high.
Nitrous, the sidewinder will make a fine intake for you. If you buy it, just open the ports to the gasket face, don't grind the runners out to CJ size, the extra area around the floor doesn't your flow. DF
Where are you guys getting these different intakes? The only aftermarket intakes I have found is the Edelbrock Performer, Performer RPM and the weiand. Will any of them give me better performance than the Performer RPM? Who makes this sidewinder? I've also seen posts about a Blue sumthineranuther. I use PAW, summit, jegs, wrenchhead.com, carparts.com and racesearch.com. What am I missing?
