Hey all,

I just signed up here on the boards. Currently, I have sold my 03 explorer and am looking at g35 coupes. I have some questions. I posted this in the wrong forum..thought it is better here.

I have been into the modified car scene for a while and have a 94 rx-7 with all engine and performance modifications per my driving needs. It puts down 415 rwhp with 126mph trap speeds. I do not want another vehicle that constantly breaks due to heavy modffication. I may keep the fd3s and use it for autox on the weekends but I want a daily driver with some spirit.

with my rx, i found that i was pushing into unreliable territory after i surpassed 370rwhp. I spent considerable time and planning to reach the 400rwhp mark and while it is performing well I still fear the day i hear detonation from a bad tank of gas or the like. the further one mods the less reliable the vehicle gets.

I really like the looks of the g35. It could use a little more umpf and I am wondering which modification paths are successful in the g35 community (ie supercharging over turbo charging, what parts, vendors etc..).

I would be happy with a 325rwhp daily driver and am hoping that there has been enough testing and trials with modifying this vehicle that I may be pointed in a good path. if people are still in the guinie pig stage with these cars and mods then I would probably just do the exhaust, intake, headers, fuel and basics...however I always get the itch for more guts under the hood.

any suggestions on which mod lists have found success would be appreciated.

are many people pushing 325rwhp+ experiencing many difficulties (are people even reaching this regularily with the current mods available).....not counting difficulties beyond proper modding order and tuning.

if you ask people on the rx boards, there are certain successful paths of modding which we have found. I helped design my own based on how I wanted the car to drive and handle. I am hoping you all might have some input for me as I am venturing away from the rotary scene and into these greener pastures.


Thanks much


J

 

i believe the HKS supercharger is quite reliable and will put you in that HP territory. no tuning needed. i am considering one if JWT twin turbo doesnt fit my needs when it comes out.

 

no tuning needed? huh? ok..maybe i come from too much of a rotary motor background but how could i not need more fuel and precise tuning if i was pushing 100rwhp over stock? please educate me.

j

 

The HKS comes already pre-tuned. Plug and play. Just keep in mind that this system does not work well with any other mods. The HKS would be very low on my list. It is a good kit but a lot of money that amount of power. IMO you can go with the turbonetics kit for about the same if not less $. This kit is putting down like 360whp and comes pre-tuned as well. I guess you could buy a boost controller and turn down the boost a little so you don't make as much power. So far to date no engine catastrophies with turbonetics but the kit has been on the market for less than 6 months. There are a bunch of people getting them installed right now. IMO this is going to be the best bang for the buck FI kit on the market for the VQ35.

You may also want to check out the APS ST that is coming out in July. Besides the APS TT it is the best and most complete FI system on the market (fuel system included). The APS ST also comes pre-tuned. It is putting down like 380whp. Anything under 400whp seems to be safe for the VQ35. So far to date there have been no engine catastrophies with the APS TT, which is putting down 400-420whp. One guys has been running 505whp on the APS TT and a stock block for about 8000 miles with no problems. APS does not recommend you run that much power on the stock block. I can't image the ST being more dangerous than than the TT.

What ever system you choose just make sure you know all the pro' and con's before you make the final decision.

Good Luck!

 

Saying that the APS TT is putting down 400-420 is slightly exaggerating. The kit out of the box on a stock engine is putting down 360whp. That's bone stock and not tuned. After people are tuning the Unichip (which you have to go through a unichip tuner) then they are getting 400-420 and even higher depending on other mods.

 

The most reliable supercharger out of all of them is the Stillen one. It has been proven to not have any problems.

 

Do a search...there are problems with the Stillen , [ belts , pulleys , very noisy , and that [ impo ] ugly hood .


You'll find small problems with every kit . APS TT is showing small problems that need to be over come . The Vortech , ATI , HKS , PE , they all have had them . Do your research and decide for your self and what you can afford . Try to find guy with the kits in their car and get a ride from them . Dont decide on the kit that is in the first car you get a ride in .

 

Ok, then I guess this guy is exaggerating.....415whp with test pipes and nismo exhaust on out of the box tune.

http://www.my350z.com/forum/showthread.php?t=125516

 

the problem with pretuned maps is they are not tuned for the vehicle. in my rx7 that would mean a doomed motor. trust me...been there. are precise afr's not necessary on a motor like this? I would think they would be...especially if you are putting down numbers that high.

pretuning is just a guesstimate. every car is different. is there no stand alone engine management systems for fuel which are available? I would think that would be the smartest path so that I could have it tuned in cali by a reputable tuner. that way it is tuned for my mods on my car...not another companies mods (which vary in performance many times) on my vehicle which they do not have at their disposal for matching afr's

think of it this way...if ten g35s are dynoed each one puts down different numbers. some put down twenty hp over others even in stock form. each vehicle is different and needs to be tuned accordingly IMHO. If there is no stand alone fuel management hardware/software for this vehicle then I suppose guesstimate pretuning is the only way to go. However, no matter what the vendors say, that is still a best guess based on the cars they have the maps tuned for.

please correct me if im wrong...am trying to learn here before making any decisions.


jason

 

No standalones available for our cars yet except the HKS V Pro and it has to be tuned by an authorized dealer (very limited).

As far as the tune not working for all cars you are right, but at those power levels unless you have major work to the car the pre tune will work just fine on the VQ35. Infact there are several kits that are pretuned and locked so you can't retune them.

 

I agree with your assessment on the out of the box power. However you should qualify that statement by saying it's with the stock cats and a 91 premium map. Indications are that if you go with a free flowing exhaust that number could get up around 380 hp.

The stock map for 93 octane will get you even more than this.

Also the stock kits come with a pre-set stock map. Yes it is not tuned specifically for your car, but the data is based off of APS's tune of the kit, so it's misleading to say the APS kit is not tuned.

 

Haven't heard of any of those problems. But no engine problems have been seen with the Stillen.

 

I was into tuning scene for quite a while... also have owned an RX-7(FC).

Rotary engines require great care. Everything has to be perfect all the time or your engine is toast... this is not the case with piston engines. Also, the factory tunes of the FI kits are at very rich AFR, so it is pretty safe to run it without tuning. However, with fine tuning, you would be able to be at the optimal AFR and get the maximum power out of your setup.

I just got simply too tired of how much I have to care with my FC... so I got rid of it. Owning a rotary engined car after Supra with indestructable(well, not really but almost ) 2JZ-GTE wasn't an experience I was quite ready for... I thought I knew enough about rotaries and was ready to get one after countless hours of research but that wasn't the case