Hey just thought I would seek out some knowledge and insperation from you guys. Now this is a question for a possible future mod that I am currenly concidering, granted this wont be for a couple of years given the scope and financial strain that I will obviously incur. Now I have just been doing a little research on the matter and would like to know what you guys think and possible alternatives(*baring any type of FI*).

What I have been considering is changing the engine displacement from 3.5L to a 4.0+L by boring out the cylinders and possibly aquiring a stocker kit to complement this or just one of the two. Now I know there are a lot of factors that come into play for this and it's probably not going to be easy, but since I really want to stay N/A with the car and know that any little bit of HP gain beyond 300whp will have to be done through building the engine, do you guys think it's a good idea and is the VQ worth going through all that trouble?

Now i'm already pushing out close to 270whp and next year I am going to be doing heads and cams to hopefully get me up to 300 with a tune, I am wondering how much I could potentially push out staying N/A and not scrificing too much reliability/drivability.

Thanks for the input guys and I hope I wasn't too vague on my intentions.

 

you'll get more responses over on my350z.com, but i suspect the folks there will tell you its not worth the money.

 

no, not worth the cost/benefit ratio imho. What are your reservations going F/I?

 

If you want over 4.0L displacement then you will have to get a stroker kit. Installing one of those is not an easy and trouble free task. Gains will also be fairly small if you don't get the right supporting mods. Basically think hard before you jump into this.

Doing an engine swap with an LSX is something you can consider if you really want to stay NA, also you'll ultimately be making more power. It'll be cheaper too.

Do I think it's worth it? Yeah, that's why I did it, but everyone is different and are looking for different things.

 

If you are looking for NA power I think you need a lot head work and some pretty aggressive cams along with the stroker kit. Higher compression pistons will be essential as well. the stock DE is at 10.3:1, 35HR is 10.6:1 and the 37HR is 11:1.

Cheaper to do a LS swap like he said^^ but depends what you are going for. If money isn't an issue then who cares...

 

I could not think of anything more bad *** than an LS3 or 7 in a G. Put a little american muscle in our cars.

 

Thanks, I dunno what it is but I just like the idea of getting pure power straight up from the engine without FI, not that I really have anything against turbos or superchargers, I guess I kind of see it as cheating a little which i'm sure is not the case. I guess in the end I may end up conceding to the norm.

 

Thanks guys much appreciated, I definitely have a lot to think about in the coming years on what more to do with the engine.

 

ah first of all i would never go american muscle too heavey of an engien and eats gas i would just go with costworth they sell a short block and the complete kit for about 8 to 9k if you are willing to spend the money as it was stated in the imprt tuner magazine it gives 400hp i don't know if thats true but i am willing to give in but i am all JDM, i would never go USDM F**k that as seen with the 300ZXTT ive seen it eat z06 cobras roush mustangs and Z28 camaros with procharge and a built engine just give it a little more time and your mod list will grow. Eventually you will be eating up newer cars peoplejust don't know the potetial this engine has like the japanese do they even have a race engine model ade by NISMO for the VQ35DE with up to 400+hp

http://images.google.com/imgres?imgu...%3Den%26sa%3DX

Already, the Nissan 350Z has taken off as a circuit car in Japan. This Nismo developed race version of the VQ35DE - complete with tricked heads, 13.5:1 compression, beautiful tubular extractors and a short-length six-runner intake - makes 450kW at 8000 rpm and 422Nm at 7000 rpm. As we said, it is a race engine...

 

The LS all aluminum V8 is far from being heavy.

 

The cosworth block you can currently buy is only 3.5L. There is a guy on my350z with an all out NA HKS + cosworth build, you can look at for real world reference. The one that importtuner had was a stroked out engine to 3.8L and the 438hp is at the crank.

 

at the crank thats good isn't it? plus the mods that should equal 400+hp

 

At the crank is not good or bad, but the numbers there will be significantly higher than at the wheels. Pushing 400whp at the wheels NA with a VQ is not going to be easy no matter how you spin it.

 

yea thats true man hope a very good diferential and engine built helps out my choice i would have a Master mechanic do that work for me or have a shop that builds racing engines do the work reliability since its been done before not sure if anyone else has done that. But i'll give this engine a few more years ti'll they find better ways and engineering to build strong N/'A engines after all they are still new. but not that new and its the 1st of its kind.

 

You can check out my build if you are interested, it is built by a race engine shop that has been making race engines for the past 30 years on the Nissan platform. The engine has had extensive work done to it and should be running very very soon.