mistermax

lets say an otherwise stock 2k2+ auto is equipped with hotshot or cattman headers. can they pull on stock 6spd 2k2's? and by how much?

meccanoble

iTrader: (22)

hmmm, that would be an interesting race. I think the auto may win. The drivetrain loss i dont think is greater than the gains from cattman headers on the 3.5 engine. Isnt that like a 20-25 @ the wheels gain? and normally arent the transfer of power from the crank to the wheels normally a 20 hp loss? (i remember the 4th gens having 190 hp and people putting out 176 or so stock?). Plus the power under the curve may be better wit the header setup....Interesting race nonetheless....

steven88

iTrader: (28)

from a dig...the auto will have a chance of winning....that is if the 6spd messes up...it's very tricky to launch a 6spd too...but from a roll...the 6spd should still pull away....depends on wut kind of roll too....if it's 65 and above....the advantage is more towards the 6spd.....cuz right when the auto tranny hits 3rd gear....its a very loooong gear while the 6spd is still holding 3rd all the way to 92-93ish mph

screamindman

Are those Cattman's really pulling 20-25hp more. It seems possible because the hotshots are showing 19hp (I think someone dyno'd them on the org)? Good question about who'd win. That would be a close one....

Nissan SE-R

Easy answer! The 6 speed with the headers

bigdo26

iTrader: (3)

in a 1/4 race, i'd put my $$ on the auto. anything from a roll tho, the 6 speed has a better chance cause of the close gear ratios. but both are quick

SoonerFan

iTrader: (5)

and the word isnt "fast" (top speed) the word is "quick" (amount of time to get there)
very diffirent

and i would win

Puppetmaster

iTrader: (48)

Not if I were there...

SoonerFan

iTrader: (5)

we have the same car!

Puppetmaster

iTrader: (48)

Almost the same...

LA02MAX

iTrader: (3)

you always have to bring up the fact that you have HLSD unlike most people, huh?? :attention

steven88

iTrader: (28)

puppet master has HLSD!?!?!

mjg

it still won't make his car quicker in a straight line.

LA02MAX

iTrader: (3)

yup...(i hope that wasnt a joke, cuz i took it seriously )

i thought that it would make it a bit quicker, simply because the power to the ground would be managed a bit better than a non-HLSD max...

steven88

iTrader: (28)

I heard two different stories....

1. Our maximas have so much TQ that the HLSD WILL NOT help wheel hop in a straight line race....it will only help our car's if it's exiting a corner

2. HLSD does help our cars in a straight line race becuz the power would be managed just like maxilvr06 said.....

can any body clear & confirm these scenarios?

JClaw

iTrader: (17)

Solid motor mounts kill wheel hop, not HLSD. It's good for curves, but doesn't really have an effect for straight lines...

Puppetmaster

iTrader: (48)

No it won't, I never said it would... I was kidding around with Jason (Soonerfan)... sorry to cause any confusion...

MaxedOut2003

iTrader: (2)

i went to a track and i had a run with a 6spd max 03, i have a 03 auto , both had EVERYTHING STOCK we did a run from 20 mph up till 100 we stayed neck to neck the entire way we did 5 runs out of the 5 runs he once got about 1/4 of a car on me, and that was when i took it up to 120.

This was a secured area where we had these runs.

LA02MAX

iTrader: (3)

yeah, when i said that i wasn't exactly expecting it to turn into an HLSD debate, but i was just commenting about how you said you and sooner's cars were almost the same, which to me, implied how you had HLSD and he didn't
and don't get me wrong, if i had HLSD, i would be bragging about it to regular 6-spd owners as well

mjg

You didn't say anything, i wasn't putting words in your mouth ; ).

I was just saying, that's all. I threw an HLSD on my car remember?
Definatley makes the car more reliable in lousy weather, and when you wanna have fun around the twisties.

scopium

the stick better pull quick on the line... cause high end auto and stick are pretty much the same...i think auto would take

Puppetmaster

iTrader: (48)

I agree... you can feel the HLSD help in the wet or snow... and even when gunning it around or out of corners, but that leads me to believe that it would at least help when you're launching, since like already mentioned above by Steven and Maxilvr06, the power to the ground is "managed" by the HLSD. The only time I think I've "felt" the HLSD work is when I've taken a corner in wet conditions and tried gunning it when I'm halfway out of the curve... the inner wheel feels as if its slipping but then the car still straightens out nicely when the outer wheel starts to pull more.

From my understanding, the HLSD works by shifting some power to the wheel with more traction while still supplying a little to the other wheel. An open differential transfers the power to the wheel with least traction (path of least resistance). Thus, if the car had HLSD, power would be distributed more evenly between the 2 front wheels leading to more traction on launches (assuming no/negligible wheel hop). That's why if ya took a car with HLSD and dumped the clutch at say 3000, you would almost always see twins left behind (I've tried this a couple times, its true). I'm not pretending to know a lot about this, but just based on my understanding, it seems that with HLSD, launching would be better, so all comments/criticisms are welcome.

And yeah, wheel hop is only reduced by reduced flexing of the motor mounts and maybe the suspension bushings, not HLSD. Wheel hop is not the same as traction.



PS: I have HLSD.

LA02MAX

iTrader: (3)

exactly what i was thinking....that's why it would make more sense that an HLSD-equipped car would, in fact be better off the line...i think that most of these people are referring to a race from a roll, which really wouldnt matter whether you had HLSD or not, because the traction is pretty much already there, unlike from a stop...(if that made sense at all!)

not fair....

Puppetmaster

iTrader: (48)

For those of you interested, I stumbled across another thread debating the effectiveness of LSD on launches (given that this was in the FI forum, so they're talkin waaay more hp to the ground than we are)... their opinion is that it doesn't help much...

http://forums.maxima.org/showthread.php?t=397419

SoonerFan

iTrader: (5)

so it looks like we have the same car after all when it comes to a straight line race.
and i would take you now since i have MT-90 and you dont