I'm interested in this thread as I may have to rebuild my 5.8 in a while. It sounds like the 5.8 would perform more effectively with the 5.0 intake, is that correct? If so, what else would one need to do to the 5.8 in order to have the parts work together? IE: cam?
If one put the 5.0 intake on the 5.8 would it give the 5.8 more bottom end or top end power? I know that intake size can mean a huge difference in bottom end torque or high rpm power so am curious.

 

The 4.10 axle gearing certainly helped there but if you can believe it the stock Lightning cam is also quite a bit smaller than the 5.0HO cam.


Not a lot overall but the Comp 35-512-8 will prouduce more low rpm Tq.

No

 

No. For starters the intakes are not interchangable because the blocks are different widths, but even if they were the intake won't make any difference unless the stock heads are also changed... because those are also far too small for this displacement. To maximize the potential(at least 1hp per cu/in) the whole topend of the motor has to be swapped for afteramrket parts, but then you'll also need to sink some serious dollars into upgrades for the EFI and fuel systems.
If however you just want to maximize low RPM Tq then the stock parts are fine but the cam will need to change and the complete exhaust system has to go in favor of longtubes and either a single or small dual setup.

 

Thank you for the information Conanski. I will definitely have to do some serious research when it's time to overhaul my engine. I will be putting headers and dual exhaust on it though. I LOVE the look of duals out the back of a pickup so they are a must for me some day.

 

Here is where its at now.

 

I think I figured out the deal with the fan shroud. I do believe the thinner shroud is for the thicker super cooling radiator. My truck did not come with the bigger radiator, but I installed one when replacing a bad one. My friends truck has the thicker shroud with the thinner radiator and the fan sits half in and half out. I guess I'll use the shroud I got from the donor truck.

 

Will the stock ECU have trouble with what I'm planning on doing?

It sounds like that cam will be exactly what I want.

I'd like to have the 4.10 rear like the Lightning. That would also help with the get up and go department. The 3.55 will have to do for a while.

I'm kinda surprised that Ford didn't put a better cam or even a roller cam in the Lightning.

 

You could be right about them being intentionally choked down. I wouldn't put it past them.

 

I'm going to run true dual exhaust on the truck probably with Dynomax Ultraflo mufflers. How would I go about splitting off the tube from the air pump to both pipes?

As for headers, I'm most likely going with JBA in stainless with 3/8 flanges. I really only want to buy headers once.

 

Probably easier to run a single system till it splits in the rear if your keeping the cats. although, I'm not sure if the newer cats need the air injection pipe ran into them could be wrong though.

 

I'm fairly set on running true duals down the passenger side with the mufflers turned sideways so they can be side by side. I've always wanted to have it this way instead of a SIDO muffler.

I'm thinking the little high flow bullet cats will work, but not sure exactly which ones to get. I understand that most modern cats don't need the air injection, but prefer to do it anyway. It could help. I also think it has to be connected to pass emissions.

 

Conanski, Can you be more specific on which 1.6 roller rockers to use with that cam? I'm hoping to get some that clear the stock valve covers with minimal clearancing.

 

Stock rocker arms are 1.6 ratio

 

That's what Conanski said to use with the Comp cam.

 

Ty Is building this for my truck and i'm giving him my 302