How too get more low end power for 1997 240sx LE

[DorianrZX]

I just swapped my stock wheels for massive 18'' ones and iv'e noticed a large loss of power at low RPM's. Iv'e parted with the stock wheels and the 18's look amazing. Is there anything I can add to get my power/torque back.

Would a turbocharger create 'turbo-lag' or would it help me in my situation?

[Dittoz7]

Every Turbo Creates Turbo Lag.

[krayzie94]

I just swapped my stock wheels for massive 18'' ones and iv'e noticed a large loss of power at low RPM's. Iv'e parted with the stock wheels and the 18's look amazing. Is there anything I can add to get my power/torque back.

Would a turbocharger create 'turbo-lag' or would it help me in my situation?

Sounds like supercharger, nitrous, and 110 Octane are your only hope.

[asoomal]

The cheapest way to do this is to swap your cams.

zerothread/152578

According to that thread, 240/240 should give you a nice low end torque curve.

Or you can run a low boost turbo setup, such as a T2 series turbo. You'll barely have any lag, and you'll have lots of low end power. It's also possible to supercharge the KA, if you really want to.

Supercharger link: zerothread/191929

If you have some stupid amount of cash, might as well swap a LS1 in it :P

[simmode1]

Really? How wide are these 18's?

[E7-S14]

Every Turbo Creates Turbo Lag.

such a misleading answer

yes every turbo charger creates lag.but a good sized turbo like a t3/t4t25/t28 will spool rather quickly

im going to assume your not going to boost your car anytime soon so maybe cams would be a smart choice for you
Modified by E7-S14 at 5:14 PM 1/19/2009

[asoomal]

such a misleading answer

yes every turbo charger creates lag.but a good sized turbo like a t3/t4t25/t38 will spool rather quickly

im going to assume your not going to boost your car anytime soon so maybe cams would be a smart choice for you

I'd love to have a quick spooling T38 turbo...

[E7-S14]

I'd love to have a quick spooling T38 turbo...

hahame too

[daconkiftador]

^Im pretty sure their on sale this week.. time to buy.

[S14toRPS13]

Throw in a V8. Seriously though, bigger wheels are going to mess up your final drive making your car feel slower. You remember that term plus-sizing. A properly sized turbo will give you good midrange, but it won't help out with lowend.

[nifares240]

how heavy are the 18's?

[ArcherV20]

Is the LS1 swap really that much more expensive than the CA or SR? Or are we talking RB levels of work?

Always intrigued me, I'd love to pick up another S14 just to drop a V8 in it.

[nifares240]

no man. it's way cheaper than sr or ca.

[xX RB Xx]

Is the LS1 swap really that much more expensive than the CA or SR? Or are we talking RB levels of work?

Always intrigued me, I'd love to pick up another S14 just to drop a V8 in it.

haha rb's are easy bro..

and plus with a v8.. you can go to any parts store and but a full v8 swap.. im sure they have blocks n **** just laying around. or at least around my area they dude.. thats all people want.. big blocks chevys and what not..

[White Comet]

ls swap the heck out of your car

[DorianrZX]

I love my rims to death but im focused on preformance.

I have the 18'' Stern St-8 rims&Nexen 255/40/18 Tires

Is it possible if I get slimer tires like a 215 and kept the rims would i recover my power loss??

[myS13wantsaVQ35]

I do not think changing your tires are going to help you all that much. I would go with the ls swap if you want some real power at a good price.

[AZ89two4Tsx]

^ Holy crap, going from a 255 to a 215?!? Yeah right. And no, you wouldn't really see a big difference. You would just have tires that are rediculously stretched. If you're looking for a cost effective power-adder, the cam swap is a decent idea.

Btw, how wide are these wheels? 255 so I'm assuming about 9.5 maybe?

[DorianrZX]

yeh they're 9.5 wide. I dont want to swap i love the KA.

With 16'' stock going to 18'' how does the 2 inches rob so much of my power.????

[vda240]

get rid of the wheels then...

I got my 18x9.5 wheels with 245/40/18 tires instead of my 15 inch oem ones, and my car does not feel slower at all, if all, it feels the same if not alittle bit faster.

[myS13wantsaVQ35]

it is not the fact you went from 16 to 18, the width is crazy wide for a ka.

[AZ89two4Tsx]

It's not so much the diameter, it's the width/weight. If I remember correctly the 16s on an kouki are 6.5" wide. The ones you have are 9.5" wide. That is A LOT more rubber to the road thus creating more friction and slowing you down some. Also take into account the extra weight from the 18s, thus creating more rotating mass.

[S14toRPS13]

It's not so much the diameter, it's the width/weight. If I remember correctly the 16s on an kouki are 6.5" wide. The ones you have are 9.5" wide. That is A LOT more rubber to the road thus creating more friction and slowing you down some. Also take into account the extra weight from the 18s, thus creating more rotating mass.

This thread is so full wrong information. If you buy bigger wheels, you need a lower profile tire to keep your final drive the same. That's why some of you probably experienced a different reading on your speedometer after going from 15's or 16's to 18's. Obviously the 18's are going to have more weight on them too, but some of you guys need to learn about how the diameter changes your gear ratio. Imagine throwing on a transmission from a torquey motor like the LS7 and fabbing that transmission up to a motor like a D16 from a Civic. The gears are too long for the motor and it'll take forever for that D16 will struggle through the gears. The similar thing is happening here. The gear ratio has been changed and the gears are too long for the current engine.

OP, to keep it simple, your car most likely feels slower now because now the overall diameter of your wheel is bigger than the original diameter from the factory. Therefore, you have changed your final gear ratio and you engine doesn't like it.

[S14toRPS13]

I love my rims to death but im focused on preformance.

I have the 18'' Stern St-8 rims&Nexen 255/40/18 Tires

Is it possible if I get slimer tires like a 215 and kept the rims would i recover my power loss??

The width of the tire is mainly for traction purposes only. Don't listen to these people. Most likely you'll need to go with something like a 235/40/18 to lower your sidewall and your overall diameter of your wheel to correct your gear ratio again.