Obviously I'm partial to a turbo 2J, but the uz platform is still pretty awesome, the price to performance ratio is outrageous for big numbers though and the engine bay gets tight fast when going fi. The instant torque down low is alot of fun compared to a 2J, but once your at speed a turbo 2J is an absolute blast, it just wants to keep going.

But who can deny how sweet an itb uz sounds.. oh yeah, mmmm racecar, doesn't even matter if it's acutally fast or not, people will just think you backed off on purpose with a sound like this.

 

^ truly spoken

im looking into investing in an exhaust right now, purely for aesthetics/sound but cant see how someone would justify paying like 100 dollars for every hp for an exhaust, myself included.

think it may just be a latter mod

 

This video is awesome

 

What heads were you talking about here? I'm assuming you ment headers since they are not mentioned and would help alot on the gs 400. Search and do some research before going into heads and headers, it's not as simple as throwing on a muffler.

Always go by horsepower at the wheels, provides a much better answer for real world applications. Crank HP is great for engines mounted on stands not in cars. Since crank HP measures higher since theres no loss from transmission, ect, companies selling parts will claim gains at the crank because 30Hp lookes better then 22WHp.

Can you post a dyno of a stock GS400 putting 250ish WHp? I've seen most to be around 225ish. Also 380Hp at the crank will make more like 285WHP since about 25% is lost before making it to the wheels.

So OP, thats about 60 WHP your looking to add and by intake exhaust and a tune you wont add that much. Adding headers aswell, search for a dyno I haven't seen any proven numbers but could be close to your goals if not more. If we start talking about changing heads then we can look at different cams and theres no reason why you couldn't get much much more power still NA. However the cost will also start adding up fast aswell. Even just headers are very time consuming to install.

 

Just drive the car...if you want a race car buy one

 

More like 15-20% loss. The car put down 250whp which is around 15%. So with full exhaust, short ram and a tune I say 28x-29x whp give or take.

 

[QUOTE=gs400rpg;7274844]What heads were you talking about here? I'm assuming you ment headers since they are not mentioned and would help alot on the gs 400. Search and do some research before going into heads and headers, it's not as simple as throwing on a muffler.



Always go by horsepower at the wheels, provides a much better answer for real world applications. Crank HP is great for engines mounted on stands not in cars. Since crank HP measures higher since theres no loss from transmission, ect, companies selling parts will claim gains at the crank because 30Hp lookes better then 22WHp.



Can you post a dyno of a stock GS400 putting 250ish WHp? I've seen most to be around 225ish. Also 380Hp at the crank will make more like 285WHP since about 25% is lost before making it to the wheels.

So OP, thats about 60 WHP your looking to add and by intake exhaust and a tune you wont add that much. Adding headers aswell, search for a dyno I haven't seen any proven numbers but could be close to your goals if not more. If we start talking about changing heads then we can look at different cams and theres no reason why you couldn't get much much more power still NA. However the cost will also start adding up fast aswell. Even just headers are very time consuminqg to install.[/

I was talking bout getting headers. The only mods I'm goin to add is a full exhaust, tune and a intake. I dont really have the money beyond that. So my question was referring to how much power is that gonna give me to the crank? I have a pretty good idea of how much it's gonna give me to the wheels. I'm looking to create a street inspired GS4. But its mostly gonna look fast. Despite only having those few mods

 

Nope. 380 crank would give you just barely 300whp; we have roughly a 20% loss due to the tranny. Also, a bone stock GS4 will give you around 235 - 245 whp depending on how it was maintained in it's earlier life.

The mods indicated by the OP will probably make him hit aroun 290 - 300whp, so he should see the crank numbers he's trying to achieve. That's assuming that the heads will add around 25whp, if not he will see lower. Throw a set of headers into the mix and he will see 300whp for sure. Look at my setup. A little under 283whp and I don't have my heads done.

 

Ok so now thats clear just a intake tune and your M2 exhaust, depending how well it's done I'd say 20whp more with headers maybe 40WHp in all. Your right it will look and sound faster then it is.

Rock-a-Lex knows what he's talking about.
Read here https://www.clublexus.com/forums/gs-...nd-tanabe.html
post #4 is right on and Bigwes search is your key.


20 to 25% loss seems right.

In the video SRTGS300 posted we never see an actual dyno graph, and the wheels and tires are not stock so theres chance for weight and size differences. Also the first run they claim 228 in the wrong gear "228HP and 238TQ and then 250HP and 276TQ"

Perhaps the biggest difference is between dyno types themselves. Dyno's can be very useful for tuning and showing differences when changing parts or tune with the same car on the same dyno. Just to claim my car made X WHp they are useless in my opinion.

When it comes to plain simple bragging rights and crank power just tell your buddy's your exhaust, tune and intake and some ebay chip get you a claimed 380HP... yeah..., but when you race and loose to a 200WHP gutted civic don't ask why.

 

Fyi, my results and the gains I saw were done on a dyno dynamics dyno...it does not inflate the hp results like other dynos do, such as a dynojet dyno. So my findings are accurate. Headers alone as well as an A/F controller alone can yield 15-20whp each. Good luck.

 

What is a A/F controller?

 

Nevermind, I kno what it is