from my VG 5spd. I need to know what I can do to get faster revs from my VG and I don't mean ECU upgrade. Too much $$ right now and pointless at this time. I need to know what else I can do so all you gear heads help me out (even though you hate the VGs, ok?)
Thanks, guys...

 

so u have the udp yet?

 

its not hate.....its fear!

 

vg powa!!

 

No. I've been reluctant because I felt that to get the best gain I needed the whole set. I know that underdrive pullys help reduce the drain from a/c and stuff like that to gain more horsepower (like 2 at the max) but I haven't heard anything of them helping revs faster?????

 

well.. it would make sense that it helps rev faster
cuz the pulley wont drag down on the car nearly as
much as before, killing parasitic losses

 

Very good point. This is the kind of input I was looking for. Thanks, Yak! Ok, can I find the UDP at Place Racing? I think that's the only place I've found it for the VG but if you know of somewhere else (maybe cheaper) let me know. I think I'm gonna have to invest in the UDP after all. Should I just get the crank pully or the entire set???

 

UDP
Shaved or lighter Flywheel
Unhook the AC

 

Try some 195-35-15s. That should do it.

 

so you're simply looking to make the engine rev faster when you floor it in neutral?

in that case, you need to reduce anything dragging on the system. i.e. alternator/power steering/etc...

that means get a UDP/lightened pulley.

You also want to reduce rotating weight as much as possible. that means either reduce the mass of your current flywheel (have it lightened), or buy a lightened flywheel from Stillen or some place. (they're almost as much as a new ECU though)


You also need to free up your airflow as much as possible. that means intake and exhaust mods.

My car with just intake, lightened stock flywheel, and UDP makes a HUGE difference in the revving speed. before, I'd floor it for 2-3 seconds and be at 4000rpm. now if I floor it for more than a second, it hits the rev limiter.
the revs increase faster than the tach can keep up. when I let off the gas, the tach needle actually bounces around on the tach until it's stable.

 

Thanks. I've actually done the flywheel, intake, and exhaust... but I'm just not satisfied with it. I think you all have convinved me to get the UDP, though. Thanks again, and if anyone else has anything to add I would appreciate...

 

My VE rev's a bunch quicker! Just get the da** UDP is what we're saying!

 

......????????????............
I have 225/50/ZR17
what diff would rims/tires make on the revs?????

 

my exhaust and UDP helped ALOT, the exhaust actually helped more than the udp

 

ummmmmm pics dammit??????

 

pics of what? you can't see 'em from outside the car..


well you can see my UDP.. silver anodized aluminum pulley and I don't have the cover on that side of the engine..

 

I think he means pics of ry's exhaust. HEY FLY: you were supposed to post those pics! OT: did you find out for sure about the bose amps? I still want that thing...

 

A little term known as "unsprung weight." Larger wheels are often times, but not always, heavier than smaller diameter wheels. Same for the tires themselves. Unsprung weight is the weight of things like wheels, tires, brakes, hubs, cv's and any aprts of the car that are not supported (help up) by the springs of the car. This is all dead weight that the car must "push" to get moving. The less unsprung weight your car has the less inertial energy required to get it going. That's all for physics class today.

 

Yeah, ok, but I'm failing to see how that could possibly effect the revs of the engine. How could that ever have an effect on the car if it's not even moving?? It just doesn't make sense. If you have a point, please help me to see it...

BTW: my 17's are collectivly almost 4 lbs. lighter than the stock 15's that came on the car. Forged billet aluminum. Very light. The tires may be heavier than stock, but the rims are so light it more than makes up for it.

 

That much is true. If the car isn't moving (stationary in park or neutral) it won't make a lick of difference. Unsprung weight is a factor in acceleration. The car will rev freer under acceleration with less weight to get moving. Hence the "point."

 

Um guys I think Jeff was joking about how the smaller diameter tires would effect the gearing: Causing the faster revs (this would only apply to when the car was moving)

 

My point exactly.
The lightened flywheel helped the most so far, but again I don't have the UR UDP. One bad thing I can say about the lightended flywheel is this:
At idle my car is very noisy. Not the exhaust tone, that's nice. It's a swooshy kind of sucking air noise. At first I thought I had some sort of leak or something, but when I took it in to get looked at by the professionals they said it was fine and what I was hearing was flywheel noise.!?? Anyone else have a lightened flywheel and experienced this? It can be heard outside the car, but inside it is very noticable and I keep having to explain to everyone who rides with me what it is and I'm not sure I really know myself other than it's "flywheel noise".