Slow rev's relate to slow take off?

[redbullssg]

I have had a few V6's in my time, but it seems like the Dodge 3.5l spins up very slow. I mean when you sit in park and rev the motor and rev it, it take abnormally long to spool up. Why is that? Is it because it has a heavy crank to try to improve the low end torque? It reminds me of my Polaris Scrambler 400. It reved slow like that, then I lightend the fly wheel by less than a pound and it changed dramatically. It changed the whole attitude of the bike. Went from taking off slow from a stand still to flippin over when I nailed it... I wonder if lightening the rotating mass would do the same for our motors. I didn't miss the low end torque after doing it because of the way it spooled up so fast, the HP was more readily available. It didn't change the HP, but it just got there quicker....

What do you all think?

[lowryder99]

Well in neutral it revs slow because the electronic throttle control...no cable and linkage means the computer gets to tell it what to do sometimes and not so much with the skinny pedal.

[Bryali]

I agree with lowryder. The computers on these cars is probably the biggest problem. That's why having a Predator is so important. We have to trick the computer to accept all the changes we've done to our motors.

[redbullssg]

So, the computer tells it to Rev down slowly to? It is slow up, and slow down, like it has a heavy crank, or rotating mass. My Polaris was the same way, until I lightened it up.

I plan on getting a Preditor, as soon as I find one for the right price, but I have heard 3.5s with them installed and it sounds the same, as far as the Rev.. Nothing cool about vvvvvvvrrrrrrrrrrrrrrrrrrrrrrrrrrRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrm mmmmmmmmmmmmmmmmmmmmmmmmmmmmmm, instead of vvvvvrrrrrrrRRRRRRRAAAAAArrrrrrrrrmmmmmmmmm, like the HEMI's. Notice the "AAAAAA" sound in the HEMI rev? =)

[Brad SXT]

from what I've heard the hanging revs are part of the engine design in an attempt to increase engine life. I get the impression the 3.5l engine wasn't made to go fast...

[oakcharger]

I believe the valve runners inside our intake manifolds are a culprit as well as they regulate the air travel based on the RPM of the crank sensor. only if we could replace the upper intake manifold

[Exzaber]

maybe someone will come out with one soon . " hint hint"

[redbullssg]

I wish someone would! There has to be room for more improvement. Plus 310hp to the wheels of a 3.6l Camaro, and 29mpg makes me kinda ill.....

[oakcharger]

yeah the GM v6 has a much different upper intake. Hope and wait for a nice upgrade for us v6ers

[TTMR]

I don't know guys that variable intake runner system is actually pretty good.

[wishing for hemi]

the system is good for economy but not racing. the mustang guys have been taking the flaps off of the valves so the long runner/ short runner switching doesnt happen. it is always open, i plan on getting something over the winter for some experiments on this. taking the butterflies off of the intake but leaving the rods in the middle so the computer can still move them just not slow down the air flow. by doing this i think i will loose a great deal mpg wise but i would be willing to swap it back and forth with my stock intake during the race season

[oakcharger]

I was looking into this as i did see the same thing with the Mustang 6ers as well. if you want to coordinate and pool some ideas im in. More direct air, more power, so what about millage LOL

[BlueMagic300]

i dont know but i have a 3.5 and it keeps up with the hemi i have cold air intake srt 8 exhaust and the predator

[ToddStone]

It'll keep for a short while until they actually hit the gas. I had a hard time with it on our Mount Saint Helens run last August with my CAI and the R/T and Diablo. I need more low end tq to get to them quicker and a better mid range to keep going longer with them. I think that's where a few extra mods ie; cams, lower intake and tb will come in handy.

I've been trying to figure out a new upper intake too. What might come in handy is if the CAI could pull in more air from the front of the car and not down a long tub where the heat hits it from the engine.

[wishing for hemi]

I was looking into this as i did see the same thing with the Mustang 6ers as well. if you want to coordinate and pool some ideas im in. More direct air, more power, so what about millage LOL

as long as it doesnt lean out to bad should be alright. got to dyno test it anyway so may as well give it a try. for now i am going to be looking for a junk 3.5 that has the intake and just scoop it up from the junk yard to start i will shave em down then more and more until the only thing left is the small rod that the butterfly connects too. but yeah any ideas would be appreciated