Even though the rim and tire may way the same as 15" sawblades, the radius of gyration is significantly higher, since the 18" rims concentrate the wheel weight at the rim. So you've got a lot more wheel inertia to overcome just due to geometry. In addition, you need more torque to accelerate a car with large wheels, since the opposing force at the tire contact patch is at a larger radius.

On the other hand, as you rightly state, first gear with sawblades is virtually useless.

 

Craigo. No dyno, no comment. Nuff said.

 

Steve,

I realize that the larger a rim is, the more power it's going to take to rotate it. That's nothing new. If anything, I feel that the wide/slightly heavy 18's help keep me planted to the ground. I can't imagine the kind of torque steer I would get with the tiny 15's, I would probubly swerve off the road. (somehow I think Dave B. is going to say the exact opposite of this)

 

Jeffco, notice how I didn't say "well since my car has 350hp and 313TQ I should be..blah blah blah..." I want to dyno very soon!! I'm very anxious to see what kind of power my car is making and see if there are any places I can improve on..

JeffreyN/A-VE has Craigy10psi-VQ envy

 

Well Craigmont soda, if you dyno'd within' the last year, 99.99% of your oddball questions would have been automatically answered right?

I only envy your parent's $ Craigmont soda

 

Cool. Then you understand what we're saying that even though your wheels may not weigh more than say, sawblades, your acceleration is going to suffer due to the increased size.

I like my sawblades for that very reason, but I gotta admit Maximas look so much better with the right aftermarket rims.

 

Ask your parents to buy you a turbo.

 

 

Nah, I think i'll ask em for a 2002 SS 6spd, and keep the Max as a beater. Go straight for the brute power, whaddaya think?


www.JeFFrEy92sElIkEsMeN.com

 

Craigylikescats

 

Cats huh? Interesting...

 

so whens she getting dynoed craig?!


Eric

 

Traction is HEAVILY dependent on the type of tire you're running. Run crap tires on the 15" rims and you'll spin forever. Put sticky tires on there and traction is fine. I recently replaced the OEM RSAs on my sawblades and traction is immensely better. I'm running Sumitomo HTR 200s (V-rated summer). Wide low profile tires are good for turns, not necessarily straights. I hook up better with my 15s than I do with my sticky W-rated 17s. Ever since purchasing sticky tires, I don't have problems with excessive spin in 1st like I use to. I've got considerably more power than I did a year ago and I can mash the gas in 1st from a roll (going straight) with no worries of the tires spinning. I barely chirp 2nd either.

I guess I'm not saying to dump the 18" rims for the street, but be aware that you are definately slower with the 18s. The heavier weight and huge enertia required to spin big 18s is substainial and seeing that the Vortech doesn't make huge torque, the rims suck out power. When you go to the track, run your 15s. Even with bald RSAs I was able to grab a bunch of 2.2 60 foots. The trick is not to get greedy with the throttle. Wind up to 3000rpms and slowly slip (don't burn it) the clutch to get the car rolling and when it hooks up, progressively add gas and release the clutch. NEVER dump the clutch nor release it terribly fast. Let the SC do the work for you. If you pull off a 2.3 60' you'll be doing pretty for racing with a SC.


Dave

 

I hate (well i do now) quoting how much power my car has without actually dyno'ing, but based on similer setups I should be putting out over 300ft/lbs of torque to the crank. I guess it's just the way that torque is delivered (linear) that is the main deficit.

Do you honestly think that I would fair better with 15x6.5" rims with stock sh!tty tires vs. 18x8.5" rims with W-rated Nitto's? My car handles significantly better with this setup versus my only 17x8's with the H-rated Kumho's, and I can get up and going from a stop pretty good if I try hard. I'm sure with my nerves and lead foot at the track, even if I push the peddle down a HAIR too much with the stockers i'll just blow through first. The first time I tryed launching with my current setup, I accidently redlined it by touching the throttle just a bit too much.

I can't wait to hit the track though. June 5th marks the beginning of a new era for me. I'll be at orlando speedway like everyweek.

Erica: I need to call a place. Turbo Tom said theres a place on Colonial (orlando) that's very reputable. I'll have to call when I have some free time.

 

craigy: do you really think you will be at the track every saturday/sunday?! If so, be prepared to take it to the shop on monday...that biatch wont last....


Eric

 

 

Eric

 

What do you tell people?

When someone says, "Holy crap, a supercharged Maxima! How much power does that thing make?" The correct answer for you is, "I don't know, I haven't dyno'd it yet."

 

Yes sir.