84 w150 engine build

14hemiexpress · Nov 17, 2014

The two cams are very similar close enough that you wouldn't See the difference. That's a good cam for what your looking for. And no avitar... Mine doesn't show either just haven't taken the time to figure how to fix it.

Marksman · Nov 17, 2014

I just figured that by the time I bought it, lifters and new springs it would be more than $159 like the cam I found. I will probably go with it.

I'm going to investigate on the picture thing some..

Fixed that... Figured my profile picture would double as my avitar but i was wrong. Added one and it is all good.

how much would a set of headers gain me?

Marksman · Nov 18, 2014

Read somewhere it would gain me 30-50 HP. This sound about right?

RonJon '06 · Nov 18, 2014

I was looking at these for my '85. They advertise 8-14 HP increase over stock. They also come ceramic coated.

Mobile: Flowtech Standard Header 13500FLT: Find best Exhaust Header -Performance at Advance Auto Parts

Marksman · Nov 18, 2014

My dad has a set that he gave me off of a 78 pickup. Not sure what they are but they're bound to be better than the manifolds.

RonJon '06 · Nov 18, 2014

If they're in decent shape then why not? I think you're right, anything would be better than stock.

Marksman · Nov 18, 2014

The collectors are cut off but that can be easily fixed. Other than that they are in good shape. They have been sitting outside for about 20 years but they aren't rusty.

Marksman · Nov 22, 2014

Just bought the cam. Should be here in a week or so. I'll continue to slowly buy parts for it. I'll put it on an engine stand and pull the crank out while I'm off school for thanksgiving.

Marksman · Nov 22, 2014

Was looking at valves and researching, and i read that by 'upgrading' to 2.02 valves i would be sacrificing low end power and torque over the 1.88 valves. The site said that i wouldn't benefit from the larger valves until 6500+ RPM. 1.88 valves are cheaper too.

Thoughts?

14hemiexpress · Nov 23, 2014

Marksman said:
Was looking at valves and researching, and i read that by 'upgrading' to 2.02 valves i would be sacrificing low end power and torque over the 1.88 valves. The site said that i wouldn't benefit from the larger valves until 6500+ RPM. 1.88 valves are cheaper too.

Thoughts?

In my head 2.02 would help over the 1.88 because more air and fuel in more you can burn. But I'm coming up with the same research that below 6k doesn't help much if any. So stick with the factory 1.88 and spend a little more on a good 3 angle valve job.

Marksman · Nov 23, 2014

Sounds like a plan.

Thanks.

Merc225hp · Nov 23, 2014

Marksman said:
Was looking at valves and researching, and i read that by 'upgrading' to 2.02 valves i would be sacrificing low end power and torque over the 1.88 valves. The site said that i wouldn't benefit from the larger valves until 6500+ RPM. 1.88 valves are cheaper too.

Thoughts?

I tell people this all the time but most have "Bigger is better" in their heads, most don't listen and then they are wtf is going on.

14hemiexpress · Nov 23, 2014

Merc225hp said:
I tell people this all the time but most have "Bigger is better" in their heads, most don't listen and then they are wtf is going on.

The way this makes sense in my head is the 1.88 valves flow better than what the cylinder heads can flow so it makes going bigger mute, such as having a 1050 dominator on a 300 horse engine it's complete over kill.

Merc225hp · Nov 23, 2014

This is where I would sit back and figure out how much I expect to spend on modding the LA heads vs converting to the Magnum heads. What head will flow better with min work, what is the more desirable valve train style (shaft mounted rockers vs stud/pedestal).

Marksman · Nov 23, 2014

I'm just going off of "fix what ya got". I have heads, and I have the tooling to redo them. Plus, I already bought the cam, and wouldn't I have to have a roller cam because of the different rockers and such on the magnums?

RonJon '06 · Nov 24, 2014

The flat tappet cam lobes are angled so that the lifters will spin in the block where as the roller cam lobes are flat. Also the slope of the flat tappet cam lobe would cause the valves to open and close more slowly if using roller lifters because of the much smaller surface area compared to a hydraulic lifter.

Flat Tappets Roller Followers | Kams Inc.

If you go with the Magnum heads you'd probably want to go with a roller cam and lifters, oiling pushrods and new rockers that can accept oil from the pushrods. I also read that putting a roller cam in an LA block requires a cam thrust bearing to keep the cam from moving forward and backward.

Merc225hp · Nov 24, 2014

These parts will let you run a flat tappet cam with the Magnum heads. You don't have to run a roller cam at all and can use the cam you have ordered.

Special length Pushrods: MP# P5007477
Mopar/AMC lifters: Comp Cams #822 or MP4529220
Magnum head bolts: MP# P4876759

Rockers I would go adjustable either SBC with the Crane Cam kit, Crane Rocker Arm Guide-plate Conversion Kits 36655-16 $135 or Mopar kit Magnum rockers, stands, guide plate, and bolts: MP# P4876050 (eight required) non adjustable. Mopar performance 1.7 adjustable kit P5007404 Magnum V8(1992-02) roller rockers 1.7 ratio $569.00

14hemiexpress · Nov 25, 2014

How much more cN the magnum heads flow vs the LA heads once they are ported out? I mean if you do a decent amount of work the the LA heads they should flow a decent amount. From the OP's perspective he's on a budget build of less than $1000 if possible, so he spends 500 on swapping to the magnums that eats half his budget up and that's before he gets them overhauled. Sticking true to the $1000 budget I would see if you can get someone to give them a nice port and polish and they probably out flow the magnums at that point. Am I wrong in thinking you can get the LA heads to out flow stock magnums? I know if you port the magnums and the LA's the magnums will out flow them. I just know first hand how out of control something can get when you start swapping to different stuff I sawpped a stright 6 for a sbc in my c10 and it was just part after part that was different I know that's bigger scale than what's going on here. If OP can keep it simple and make the best with what he has he will be closer to on budget.

Merc225hp · Nov 25, 2014

A google search will tell you flow rates of the two heads and what heads take better to port work. So easy and lots to gain, I offered my op, many have done this swap, up to the op how he goes.

http://www.mopar1.us/cylhead.html

14hemiexpress · Nov 25, 2014

Merc225hp said:
A google search will tell you flow rates of the two heads and what heads take better to port work. So easy and lots to gain, I offered my op, many have done this swap, up to the op how he goes.

Mopar LA Cylinder Head Comparison

There is some good information there. Can debate witch way to go all day long, there is no doubt the magnums are a beter cylinder head.

84 w150 engine build

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