Intercooler Questions

I'm modifying an '88 Z31 for speed, but I'm confused.

My process begins with the exhaust, intake, boost controller, and now... I/C. I don't want to spend a lot of money on a I/C kit but don't have to tools to make my own, or the time to be that creative.

I found this kit....

http://www.cmperformanceexhaust.com/online-store/z31-intercooler-kit/z31-i-c-kit-01?pop=0

and this one.....

http://www.cmperformanceexhaust.com/online-store/z31-intercooler-kit/z31-i-c-kit-02

Idk, why the first kit is so much cheaper. Also, is it a full kit? Lastly, I was planning on getting a manual boost controller, how does this play out with the BOV?

I found this kit

http://www.directtuning.com/store/pc-26504-78-hks-intercooler-kit-300zx-84-87-turbo.aspx

(here are pictures on a car, scroll to bottom)
http://www.cardomain.com/ride/405427/1987-nissan-300zx/page-6

But if I lower the car, I''m afraid that PVC will kiss the pavement.


Any help?

 

[SLEEPER]

Kit one is simply bigger silicone pipes - you could do that yourself. Kit two has a BOV and some other bits
But neither include a new intercooler so IMHO are just a waste of time.

The third includes a bigger intercooler so that is the only option i would consider out of the three.

As for manual boost controllers.....

For me thats a definate no no because you have no definate control on the boost.
If you are operating it way below the engine and turbos safety level I suppose thats ok but whats the piont in that ?
With an electronic one you can safely go much closer to the engine's limit.

In any event you will need an accurate boost guage and you need to check your engines limit.

Lastly you might be better off getting a proffessional map done - especially if you fit a boost controller.

Any turbo engine , especially nissans , will produce lots more power with more boost and the right turbo - the problem is that a lot of people just bolt them on without a thought and then are surprised when something bad happens

 

[PKnFR]

Thanks for the reply.

I'm not trying to build this to be a racer. This build is with the intention to be my DD (Daily Driver) with some balls when the time need be. I'm modifying the stock VG30DET. If I were to go balls out, I would drop an RB26DETT and mash the pedal.

I am somewhat following the article:

http://z31.com/faq/turbo.faq.shtml

The stock turbo is capable of running 15psi, but I only want to run about 10psi. I believe that will also compensate for any boost creep I may get. Also, the system I plan on using is the 2 Stage Boost Controller

http://www.boostvalve.com/pricelist.html

which has a toggle between two boost settings. Therefore, I can switch between the stock boost of 7psi and my "racing" level of 10psi. Also, I want to say the stock internal wastegate is a bleeder valve, therefore, opening before full boost is even reached. This system boasts that it does not open before reaching desired boost pressure.

Granted an electric or fuzzy logic controller helps with boost curve and can predict boost creep, thereby stopping it, I don't really want to dish out all the cash. Especially when I won't be romping on the throttle all the time.

And I just went back to the site and found that the HKS system is for 87 and below.... Mine is an 88

Also, I do plan on getting an accurate boost gauge. I have come to see demonstrations and tests the show mechanical boost gauges being the more accurate item when compared to electronic. Do you have any information that goes against this?