454 MPI MAG upgrades
 

Ok, want 550 Hp and factory looks out of my 454 Mag Mpi's. They are the 385 hp models. No superchargers (I think)
Who has the proven combination?

Re: 454 MPI MAG upgrades
 

I have a package that picks your engine up 100HP it is listed on my website. Tyler

Re: 454 MPI MAG upgrades
 

550 out of your 454 isn't going to happen without a supercharger. Sorry.

Re: 454 MPI MAG upgrades
 

800xcr is correct go with a procharger and not alot of boost(psi) due to crank also you didnt say how many hour are on the mtr.

Re: 454 MPI MAG upgrades
 

Crank is forged, isn't it? Boost should not be limited due to this motors crank.

Re: 454 MPI MAG upgrades
 

I agree, while it is a stock GM crank, it is forged. Dont know much about boost and blowers, but the crank is decent.

Re: 454 MPI MAG upgrades
 

The crank will take it but the valves and head gaskets won't.

Re: 454 MPI MAG upgrades
 

I agree with that. I dont understand how blower manufacturers can advertise their systems as a "Bolt On" . As Tyler said, at least change the head gaskets and valves.

Re: 454 MPI MAG upgrades
 

Why is 550 not going to happen? The crank & rods will handle it. The heads need a little work & a piston change to get 10:1 with the right cam should get there. I don't think I am out of line with what I want. Am I???
Tyler's kit nets 485 and that is just a cam swap & head work. 65 more HP doesn't seem out of reach.

Re: 454 MPI MAG upgrades
 

550hp is possible out of a 454MAG if forced air induction or nitrous is introduced. Raising the compression to 10:1 may also work. But what octane do you need to run and how reliable is that hp? Where we boat 89 octane is what most water pumps have to offer. I would take a hard look at Tyler's kit, I am.

Re: 454 MPI MAG upgrades
 

10:1 is pushing it. Especially with a steel head. You will have to consider what exhaust to run. To get 550, you may need a big solid roller. Reversion and idle quality will be a problem. You may have to go for dry pipes, I had to.

Re: 454 MPI MAG upgrades
 

I'm willing to learn, educate me.

Re: 454 MPI MAG upgrades
 

Seems like a reasonable goal to me. Might have to stretch for the last 50hp, but 500hp should be easily obtainable with good aluminum heads, true header exhaust (think CMI sport tubes), the right cam and the right intake (I'm a carb guy so I don't know what you'll need to do to your FI).

Just get matched components designed to let that baby rev up to 6000rpm and you'll get there (only 481 ft-lbs of torque needed at that rpm!).

Re: 454 MPI MAG upgrades
 

I've also been told th swap out the rocker arms for 1.8's. Any truth to that? On a stock setup that is.

Re: 454 MPI MAG upgrades
 

If you are changing the cam, just get the right lobes ground. No need for 1.8 rockers then.

Re: 454 MPI MAG upgrades
 

Just thinking in the in-term....

Re: 454 MPI MAG upgrades
 

I just bought a set of 1.8 roller rockers to replace the 1.7 stamped steel on my 502MPI.
I was going to do it last year during my rebuild but I ran out of $$.
A few people have told me that the valve guides will wear out faster with 1.8 but with such a mild cam in the stock engine, I'm going to chance it.
Desk-top-dyno shows that the added lift should be good for +15-20HP. And with +5-10HP from going roller, I'm hoping to see another 150-200rpm on top...
We'll see in the spring... :drink:

Re: 454 MPI MAG upgrades
 

N/A Setup from Gellner Engineering

9.6:1 JE forged pistons
Blue printed and balanced
stock GM crank
stock rods
Dart Alumn ported and polished heads
Roller Rocker lifers
crancams camshaft
MSD ignition
holley carb
dart hi riser intake manifold

dyno 514hp 510tq.

Re: 454 MPI MAG upgrades
 

Build a 540 and keep the 454 FI intake plus all assorted decals. Don't forget to paint everything black as it was. :D

Re: 454 MPI MAG upgrades
 

Stoke It To A 496.