If i get this car, there has to be some mod ability. My goal is NA with about 280 to the wheels. The Coupe generally pushes around 240, so i am wondering what can make it have about 280.
My current car is a acura tls, which headers alone give you about 30 hp to the wheels on a 6mt. Intake added about another 10hp, and these are comptech parts which have been proven over and over with plenty of different dynos.
So if a 3.2SOHC with 260 stock can gain about 40 to the wheels (peak), i figure there has to be something that 0the 3.5 can use. If i do get the G, i will definately be putting on a UR crank pulley, since i love it on my own car. But what else?

 

Unfortunately, to get close to SAE corrected 270 at the wheels you would need just about every N/A performance mod available, including cams, headers, high-flow cats, exhaust, pulleys, plenum, ECU reprogramming, and intake. Including labor that would cost you WAY more than the cost of a Vortech supercharger and even then you might only end up with 265 HP at the wheels.

Buy a nitrous kit or go with forced induction, I say.

--Steve

 

I'm not too sure about those Acura claims (mods aren't additive, they work together), but don't forget that 280hp to the wheels on a FWD is definitely different than 280hp to the wheels on a RWD when calculating acceleration. The RWD cars handle the hp much better (i.e. transfer of weight and push vs. pull). I have quite a few of the NA mods listed above and am going in for a dyno run on May 22nd. No base line, sorry.

For those who don't know, I've added the following performance mods...

RT High Flow Cats
Crawford Plenum V5
Z-Tube
JWT Popcharger
UR Underdrive Crank Pulley (installed this weekend)
JIC Y-Pipe (hopefully will be here within a week)
...and 4 coats of zaino [img]/w3timages/icons/wink.gif[/img]

All I'm missing is cams, headers and the ECU reprogram (which I've read the TS ECU doesn't do much for a 6MT). If I get anything near 260rwhp, then 280rwhp is probably possible with the additionally mentioned mods. For the record, I've spent about $1850-ish on my mods to date. The headers and cams are probably another $1000 to $1500 installed, and the ECU upgrade is just over $600 (good enough guesses?). My best guess would be ~$4000 for 280rwhp, which comes out to about $80/rwhp. This would be pretty close to the introductory FI price (minus install) which would yield an additional ~50 rwhp @ ~330rwhp.

For those like me who don't want to lose the entire factory warranty, NA is the only way to go. For those who are all guts and all glory, go FI and hope for the best.

Self proclaimed member of the 300bhp club (soon to be even more [img]/w3timages/icons/smile.gif[/img])

 

Our cars are more like 220 to the wheels stock, and yes, i would agree that you would need every N/A mod out there to come close. Camshafts a must, then eliminate cats, put in headers, exhaust, intake, TS ECU, SAFC, after that you would be pretty close.
on a side note, you would save a lot of money by going with a Supercharger when adding all the above up.

IP / 6MT / Xenons Everywhere / Mirror Tint / Injen CAI / Injen Exhaust / Tanabe Springs / Ground Wires / Apex'i S-AFC II / Some things you don't know about yet!

 

Neff I am very much looking forward to your dyno results!!! You have pretty much the exact setup I would like to do to my car. So I'm hoping you end up with great results!!!!! May 22nd can't come soon enough!!! [img]/w3timages/icons/smile.gif[/img]



R.I.P. Pat Tillman 1976 - 2004

 

Funny how PimpinPearl has claimed a dyno run of 249rwhp with only an exhaust and an intake, yet he states the average G only measures 220 rwhp. I actually know Pearl and we're going to the dyno day on 5-22 together, so I have to be nice and won't flame him. (He's actually a pretty cool guy)

But for the record, there is NO intake and exhaust to date that yield 29rwhp... Also I can go find up to 10 posts where stock 6MT coupes get on average 230-235rwhp (which is approx 17% paracitic loss from 280bhp). We are going to have Demonteverde with his stock 6MT on the same day doing dyno runs, and if DED doesn't do any mods before then, that would be 2 stock G's for a comparison.

Pearl, I'll bet a round of drinks for everyone at the dyno day that there is NO G35 that gets 220rwhp or lower. Wanna take the bet? Looser pays...


Self proclaimed member of the 300bhp club (soon to be even more [img]/w3timages/icons/smile.gif[/img])

 

I'll put a sock in my intake to get free drinks..................

2004 G35C 6MT Black. Yes Honey, I promise no mods. I love it just the way it is.

 

from what I've heard the TS ECU upgrade responds better when you have mods..I forgot his name on the boards but there is a guy with just about your set up plus the ECU upgrade and nismo clutch, he posted a pic of his 0-60 time..it was like 4.8 seconds.

 

tonio,

I read that post, but would "trust" the numbers better if the guy went to a 1/8 or 1/4 mile drag strip and posted numbers. Those G-Timers are neat, but very error prone. People can intentionally mount them in improper configurations, enter weight data that is bogus, etc... I AM NOT SAYING THAT THIS INDIVIDUAL HAS DONE ANY OF THESE THINGS... I'm saying that certified drag strip times are not really disputable (especially when you go with a group of people). Plus the guy could just be one heck of a driver to get 4.8 seconds to 60.

Self proclaimed member of the 300bhp club (soon to be even more [img]/w3timages/icons/smile.gif[/img])

 

once again neff....
SUPER AIRFLOW CONVERTOR!!!!!! SAFC.... i think i have said this on four different threads to you!!!! I'm am cracking up!!!! You can be sure to beat me on the track with all my extra weight, so don't get scared or anything by my dynoes.

IP / 6MT / Xenons Everywhere / Mirror Tint / Injen CAI / Injen Exhaust / Tanabe Springs / Ground Wires / Apex'i S-AFC II / Some things you don't know about yet!

 

agreed.. I can't argue with that but I can say I've seen the car in person and I believe his quarter mile time at the track was 13.86 (theres a video of it at g35frenzy.com). I do understand that there are different variables in this but in terms of the ECU upgrade, he said that the difference before and after the mod was night and day, well worth the money you'll spend for it.

 

Pearl,

I just finished searching google, freshalloy, nico forums, etc... for the A'pexi S-AFC and S-AFC2. It seems like it gives the user the ability to adjust the fuel levels (making the car run richer or more lean), how does this equate to hp or torque? I couldn't find anything that said this system did anything other than change (voltage?) by a factor of 2.04. If you show up Saturday, I'm going to have to pick your brain on this topic. I guess I just don't understand how this "feature" could add significant gains to a NA engine.

Also, you've made the SAFC comment a couple of times in a couple of posts but I didn't have time to research it, and haven't heard of it before. You'll have a chance to explain how the SAFC works either this Saturday, or on dyno day, and maybe I'll end up getting one too.

Self proclaimed member of the 300bhp club (soon to be even more [img]/w3timages/icons/smile.gif[/img])

 

Neff,
The MAF sends voltage data to the ECU to tell it how much fuel to send. By altering this voltage, you can make the car run more lean. For every engine there is an optimal "power" setting for A/F mixture. In our current config, it runs too rich, which makes it cooler thus safer. By leaning the mixture, you will get more power.

I don't know how a liquid cooled engine does this, but in an air cooled engine we can also run "lean of peak" to achieve cooler cylinder head temps and cooler exhaust temps. Nissan runs "rich of peak" for safety and longevity of engines.

2004.5 Coupe/5AT/Ivory/Everything but chin spoiler/Z Tube-Popcharger/Crawford V5 Plenum on the way

 

Neff,
I'm pretty sure you already understand that leaner means more power but if you want a good read try here:
http://www.av8n.com/how/
(Chapter 1 is most pertinent)
or here:
http://www.avweb.com/news/columns/182084-1.html
(read all Deakin writes, he's a great OWT buster)

alot of it is aviation related but the principles are the same.

2004.5 Coupe/5AT/Ivory/Everything but chin spoiler/Z Tube-Popcharger/Crawford V5 Plenum on the way

 

Actually, after speaking with a co-worker, I found out the opposite of -fishes statements to be "true". Some of you may remember (and some of you have met) a good friend of mine who works on the Porsche GT Racing team. This afternoon he explained, in great detail, how this S-AFC actually works.

I was told that the S-AFC II actually tells the ECU that there is MORE air entering the intake. This fools the car into dumping MORE GAS into the injectors. The car is being tricked into "compensating" for more gas. This means the car is running richer (kind of like those 300mph dragsters that go through gallons of gas/second).

Apparently the optimim A/F ratio is 14.7. That's 14.7 parts of air per 1.0 part of fuel. By making the mixture more rich (i.e. making the ratio 12.5) you get MORE GAS per volume of air.

I was told the effects are actually "worse" for the environment having to do with producing more "green house gasses". It's also bad for your stock cats (but works well with the higher flowing race cats [img]/w3timages/icons/wink.gif[/img]).

Tomorrow my buddy is bringing in a book that goes into this explaination to a greater level than I have explained. I'll try to copy it and post parts of it on the website, one way or another.

Pearl, Thankyou for putting up with my misinformed, misunderstood, sorry butt [img]/w3timages/icons/smile.gif[/img]. Apparently this CAN BE a good mod, if you don't mind the dimished gas mileage that comes with the territory.

Does anyone know if this S-AFC can be programmed "on the fly" from inside the car? If so, I might look into getting one...

Also, I found out that the Porsche GT Racing team has 3 set "AFC" levels for their race cars. When they have a yellow light, they get close to 14.7 (to save gas), and when they run under the green they run closer to 12.5 (the actual numbers are not supposed to be known). These cars have about 450-hp and when running "richer" then gain about 20-30 MORE HORSE POWER. It seems like PimpinPearl has stumbled onto something that I find VERY INTERESTING.

Thanks again -Pearl!!!

Self proclaimed member of the 300bhp club (soon to be even more [img]/w3timages/icons/smile.gif[/img])