MSD Atomic airforce

M1ck3y · May 20

Looking at getting this manifold to go with a cam, but I’m not sure what parts I need to make it work.

I know it needs a pulley and a longer belt, but not the specifics.

SeekAndDestroy · May 20

I only saw the one for the Vette, part #2700. It will probably bolt on and work, but it’s going to kill the bottom end torque. The only gains will be at 5k and up. Not very daily driver friendly.

Call Davenport and see what they think about it.

If I were you I’d save that money for a converter

M1ck3y · May 20

8 hours ago, SeekAndDestroy said:

I only saw the one for the Vette, part #2700. It will probably bolt on and work, but it’s going to kill the bottom end torque. The only gains will be at 5k and up. Not very daily driver friendly.

Call Davenport and see what they think about it.

If I were you I’d save that money for a converter

Yeah below 5000 it loses probably 30ft lbs, but up top it takes off with a cam.

It does bolt up, but the belt will be in the way. I have to somehow add a pulley somewhere to drop the height of the belt…

I know a converter would make sense, but ive fallen hostage to the numbers game.

Davenport did recommend an msd. But I’m waiting to hear back whether or not they’ve ever installed one on a truck. I’m assuming no..

Edited May 20 by M1ck3y

M1ck3y · May 20

You gotta keep in mind too, that a msd with a tune likely makes more torque than an l86 manifold with a stock tune. Or at least the difference in power isn’t as dramatic.

SeekAndDestroy · May 20

9 hours ago, M1ck3y said:

You gotta keep in mind too, that a msd with a tune likely makes more torque than an l86 manifold with a stock tune. Or at least the difference in power isn’t as dramatic.

I'll assume the DOD delete cam in the graph has the stock lift. It makes 450 ft/lbs from 2000 (with headers and E85). With your setup, heavy tires and a level, you'll be sluggish off the line with the MSD and cam. It doesn't make 450 until about 3000, and it makes the least peak torque.

The MSD intake is $2300 for 47 HP peak, and it makes it above 6000. I have upgraded push rods and valve springs and I shift at 6100. If you want to spin faster you might have to upgrade everything in the heads.

A Circle D converter is $2100. It will make your truck feel better off the line and go faster in a race. They will have the engine out already, it's not going to cost much more labor to put it in.

If you are chasing numbers go for the torque. IMO getting snapped back in the seat from a stop is more impressive than a 60-120 roll.

M1ck3y · May 20

I hear what you’re saying, I just feel that 30 ft lbs loss isn’t going to be that dramatic compared to a stock 6.2. At full throttle you spend what; a second under 4500? After that all you see is 4500 rpm and up.

I blow the tires off as is, less torque down low will actually allow me to hook up, climb rpm and then I’m laughing.

I'm confirming with Davenport whether or not additional upgrades are required to take it out to 7.

im also doing e85, but it sounds like the fuel pump may or may not be up to it. So maybe e60 worst case scenario. It cost 6-7 grand to upgrade the fuel system!

Edited May 21 by M1ck3y

M1ck3y · May 21

17 hours ago, SeekAndDestroy said:

I'll assume the DOD delete cam in the graph has the stock lift. It makes 450 ft/lbs from 2000 (with headers and E85). With your setup, heavy tires and a level, you'll be sluggish off the line with the MSD and cam. It doesn't make 450 until about 3000, and it makes the least peak torque.

The MSD intake is $2300 for 47 HP peak, and it makes it above 6000. I have upgraded push rods and valve springs and I shift at 6100. If you want to spin faster you might have to upgrade everything in the heads.

A Circle D converter is $2100. It will make your truck feel better off the line and go faster in a race. They will have the engine out already, it's not going to cost much more labor to put it in.

If you are chasing numbers go for the torque. IMO getting snapped back in the seat from a stop is more impressive than a 60-120 roll.

No need to do further upgrades to take it out to 7000. Except for maybe trunnion rocker arms. Which I was doing anyways for durability.

SeekAndDestroy · May 21

5 hours ago, M1ck3y said:

No need to do further upgrades to take it out to 7000. Except for maybe trunnion rocker arms. Which I was doing anyways for durability.

6k for a fuel system upgrade... that's insane. I know parts for our trucks are expensive but wow, outrageous.

Hooking up is a problem. It makes sense to set up your truck like that for racing.

7000 RPM shifts! I can't wait to hear what that sounds like. Going to be an awesome truck!

M1ck3y · May 21

49 minutes ago, SeekAndDestroy said:

6k for a fuel system upgrade... that's insane. I know parts for our trucks are expensive but wow, outrageous.

Hooking up is a problem. It makes sense to set up your truck like that for racing.

7000 RPM shifts! I can't wait to hear what that sounds like. Going to be an awesome truck!

Yeah, I guess there’s a high side and a low side to the fuel system. High side would be an lt4 fuel pump and injectors. Low side is actually in the gas tank itself.

Pretty excited. It’s going to be a long wait though; I’m not booked in until August 5th.

SeekAndDestroy · May 22

Waiting is the hardest part, lol.

Just looked up those parts. It’s almost $5000 for 2 fuel pumps and a set of injectors… yikes

M1ck3y · May 24

Still waiting to hear if Davenport can make an Msd fit… I told them about adding a pulley, but I’ll have to wait and see if they agree with that.

Im also trying to figure out how to put together a 4” intake to go with an lt5 throttle body. It’ll have to be custom, nothing really made for our trucks.

Edited May 24 by M1ck3y