Ok, ive got a stock internal 351W in my 88 Bronco. The parts I've bought (but haven't been able to install yet because I'm stuck here in IRAQ): BBK 65mm twin Throttle body, AirRaid TB spacer, K&N FIPK, Ford Racing Mass air conversion kit, Edelbrock 5.8 Truck intake manifold, Crane hydraulic roller lifters, iron GT40 heads with Crane 1.6 roller rockers. I've already installed Hooker Comp. headers and an MSD6AL. Anybody have any thoughts on if this combo will work and what kind of power it might make? Also need an idea on a cam. ALL SUGGESTIONS are GREATLY APPRECIATED!!!

 

i also have a set of underdrive pulleys to throw on it, as well

 

throw the TB spacer in the garbage or use it as a paper weight. the underdrive pulleys also can be throw or sold.

how do you plan to run the roller lifters on a flat tappet cam?
are the headers shorties or long tube? whats the rest of the exhaust like?
Hard to say what it will put out, i would recommend a dyno tune once everything is installed to get it dialed in.

 

1 and 5/8 primary long tubes, 2.5" dual pipes with no cats going to Flowmaster 40's. As far as the cam, that's the part I'm looking to find. I know a need a small base circle roller, but still want something to open up my engine up. Any ideas on a grind?

 

a small base circle cam is very very expensive. Honestly your not going to gain anything by going that route. a flat tappet cam running roller rockers and regular hydrolic lifters would do fine. you want power/torque down low, anything over 4500-5000rpms is a waste on a bronco. if you are dead set on a roller cam then get an F4TE block which is 94+.
does your bronco have duals already? if not i wouldnt go that route. mainly because its a waste of money, it wont flow well because of all the crazy bends to get around the Tcase. a custom Y pipe running into a Single 3" exhaust running out the stock location will perform far better for our rigs. Search its been talked about a lot. I also like the hooker Aerochamber muffler, its sound is way better then the flowmaster and it wont drone in the cab while going down the hwy.

 

I have a 351W roller block that I was going to build and put in my 92 Bronc. I have decided not to. Roller setups are best at high RPM and we don't normally see those speeds in our Broncos. Roller cams are expensive and not worth it for the street. Anybody want a roller block?

 

I'll second that. The Crane 444232 performed great in my 5.8, great TQ right off idle and power all the way to 5k(actually the stock heads and intake began smothering it badly around 4k but it still tried). If I were picking another cam for a mass air motor I's seriously look at something like this one.. Crane Cams 443511 - Crane Z Series Hydraulic Flat Tappet Camshafts - summitracing.com
or this one...
Crane Cams 523921 - Crane PowerMax Camshafts - summitracing.com
The tighter LSA should build more TQ and 0.500" lift will make the most of the hear flow capacity. I think I'm going to put these through DesktopDyno to see how they compare, I have already tried a lot of different cams and I haven't found any that significantly outperform the one I have.

BTW.. once you get north of 300 HP you'll need bigger injectors, and that will require a tuner if you want stock drivability and emissions. Also note that upgrading the cam and installing a complete exhaust is all that's required on the stock motor to net the full potential of the stock heads and produce about 280hp. So your motor with the GT40 heads and bigger Edelbrock intake should have no problem breaking 300hp.. I'd predict about 320hp with one of the cams mentioned. The Edelbrock intake has very long runners so you definitely want a cam that produces all it's power under 5000rpm.

 

thats an awesome block and you would be silly to change at this point. the roller cam does many things like improve longevity, smooths out the revs. also that block can also run a regular flat tappet cam if you so desire which is nice to. I used this motor for a 5.8 swap i did on my older 88 bronco and it ran so smooth, if you added 1.7 rockers you honestly dont even need to change the cam. the stock roller 5.8 cam performs really well already.

 

I would stick with the roller cam....

I would go with a dual profile MILD camshaft. Your LSA should be around 112... Keep your lift mild...favor the duration on the exhaust side.

The edelbrock intake is a good addition...use the BBk throttle body on it.

The TB spacer is a paper weight.

Take your headers in for thermal barrier coating.

If you have a stock bottom end(roller) and you use the heads...(make sure they have hook ups for your emissions), you can put down up to 300 hp and 330 ft lbs. This ofcourse will be contingent on several factors:

1. how well do the cyl heads flow?
2. How do the intake and cyl heads interface?
3. How does the camshaft compliment the characteristics of the cyl head intake combo?

Figure on getting flowrates first...then get the cam that is right for that combo....

Otherwise, you'll have a detuned engine.

I have a similar combo, Same year as well....I am putting 340+ hp to the ground. Now if I can get 5 speed manual trans on it for mileage...

I get 13 +/- 0.5 mpg on 32in tires and 3.55 rear end on a C6 trans. Was worse with speed density...