Matthew Starr said:
[ To give you guys a bit of a teaser i just had the heads rebuilt (excuse my lack of knowledge about engines) but i don't really understand what was done. I do know how ever that my engine is now a 3.8l
Matt,
You should not spout off at the mouth when you have no clue what you are talking about. there is no way in hell you can increase displacement with doing anything to the heads. THE ONLY WAY TO INCREASE DISPLACEMENT IS TO BORE THE CYLINDERS OUT, OR STROKE THE MOTOR.
For those of you who dont know, a stroker motor is using a different crank that makes the piston have more downward travel, which increases the displacement of the cylinder. Which would most definitely require the use of a custom oilpan.
Most people who have headwork done, have the air passages ported and polished. the result of this is being able to flow more air into the cylinders, BUT without aftermarket cams, or forced induction, you arent going to see a benefit.
An aftermarket intake cam is going to increase the time the intake valve stays open, which results in more air being injested into the engine. Of course with more air being injested into the motor, you have to have an aftermarket exhaust cam to increase the time the exhaust valves stay open to expell the gasses. this results in low vacuum. That is why you get a pretty nasty uneven idle. Its like when you see a tricked out muscle car with an idle that shakes the whole car.
in order to make all of this work properly, and actually make power, the timing has to be modified, which in turn will require some type of aftermarket ECU.
Im pretty sure a set of aftermarket cams are going to cost atleast $1500, if not more. You can also have companies do a custom grind for whatever duration you want.
So, matt, the way it stands, you are probably making an additional 15hp with ALL of the mods you have performed so far. If you really want to prove something, put it on the dyno, and post up a sheet.
Oh, BTW, im sure the video you posted was with all of your bumpers, spare tire, hitch, interior, hood, and whatever else you could take off the thing to make it lighter.
My truck is stock as a clock all the way down to the jack. not to mention a box that houses 2 12" subs. Add me to the mix(im 230), and id say you probably have me by at least 500lbs. one other thing you did not take into consideration is the size of my tires. Im running 285/75/16 tires, that is going to also play a factor. Just wondering, will your truck spin the tires? even power braking?