too small exhaust and tb would cause high-end loss and not low end loss

 

Lastrights asked so I though I should tell him what Jbomb's is running.

 

dont need to get your gonads in a uproar

 

thank you. saved me from having to say it to everybody.

AND it was on the truck before exhaust did not change

 

I was told when I was having starting issues that if the fuel sync was off you would have major running issues. I highly doubt that is your problem

 

Id have it checked, the fuel sync. Not only is this your base timing it also tells the injectors when to fire.

 

maybe you need a stronger ignition to run that 408 do you have a msd 6a box ?

 

standard ignition. But it ran great before and still runs great up top. going to try swaping the intake. and ckecking the stall of the tc. Could be the sprag went out on it or the aluminum housing for it. Unlikely but got to entertain all ideas.

If none of these work getting rid of the motor and truck and buying a cummins.

 

HMMM sucks i wouldnt its a brand new 408 it could be something stupid

 

Solved! (99% sure)

Muscle motors said that I had too much cylinder pressure and I was detonation. they were right. On the hiway today under load i could hear it so i kept out of the throttle.

Why was this not happenig before?

Because as you may have known from past threads i was given the wrong piston rings in my kit from indy. The ring were causing blow by and relesing this pressure.

So Now I will have a cam designed for this motor and not one recomended from x company.

I was telling my bro who built the motor my specs on cam and he said right away that that cam sucks *** for a stroker.


Problem solved(verify in a few weeks) :icon_ razz:: icon_razz::icon_r azz: