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Z31 300ZX(T) 1984-1989 Zs - Engine and Chassis Discussion

       
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Old Mar 2nd, 2005, 12:26 AM   #1 (permalink)
RandomGuy
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300zx AE! Modding...

Hey how is everything, this is my first thread, first post... I am new to this forum. I just acquired a 300zx turbo AE...
I know there is an 'initial mods' thread, but it isn't as clear as one would want.
Can you guys post your opinions on what should be the FIRST and SECOND mod to a AE 3z...
My thoughts...
First mod... upgrade the stock intake mani (heard these are really bad and bottleneck performance)... i also heard that with a little modding... a pathfinder mani would do the trick... not sure on this though...Ppl say that before fidget-ing with the boost... first do all the other things. ???
as for the boost controller... and the like... I am not sure of the pricing on this... but my starting budget is around 400 bux...(including CHEAP backyard friend labor)... Anyone have any suggestions?..

PS: this AE IS NOT RESTORE MATERIAL... it's gonna be a beast eventually.
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Old Mar 2nd, 2005, 12:57 AM   #2 (permalink)
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First order of business would be to raise boost. You should be able to get to 12 psi with no problems and no other mods. Get an open style air filter, upping the boost on the stock one can cause the turbo to suck the rubber intake piping closed. That's not good.

$400 is a nice chunk to start with.

A manual boost controller will run about $50. Get a real boost guage as well. An Autometer will run you about $60. An open air filter like mine (Spectre) will run about $50, including replacing all the intake piping. I used 3" aluminized exhaust piping, you might want to use something different as this will rust over time. Unless you are like me and take your car apart 3 times a week, this is not for you.

You could spend the rest on a catback, open that restrictive exhaust a bit, and then the added boost will give you that much more power. A decent catback is about $350 shipped from Certified Muffler, or maybe a local shop can piece together one for you for less.

Good places to start if you just want another 40-60 Hp right off the bat.

Above 12-13 pounds of boost, I recommend a fuel pump and an appropriate fuel pressure regulator. Both of those will likely run you more than $400, though. The things I've listed above are a good place to start, and will most likely satisfy your lust for Hp, at least for a little while.......
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Old Mar 2nd, 2005, 10:11 AM   #3 (permalink)
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thanks alot.
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Old Mar 2nd, 2005, 11:34 AM   #4 (permalink)
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a friend recomended an electronic boost controller... Anyone know how much those would and should run around... remember my tight budget... any opinions on either manual or electronic... use the savings from manual for other things... or just get an electronic to begin with... he said its not much cheaper than the manual plus the boost guage...etc
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Old Mar 2nd, 2005, 12:08 PM   #5 (permalink)
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An electronic boost controller will really gouge into your budget. Prices are around 300 bucks you can spend more or less just depends. I would recommend getting an intake, and even though it is out of your price a 3in turbo back exhuast (or 3in downpipe with an electronic cut out welded in), and a boost controller. It is fairly cheap at this point, but after this your going to have to start spending money as your turbocharger will be at the max, you will be out of fuel, and your going to need an intercooler.
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Old Mar 2nd, 2005, 05:55 PM   #6 (permalink)
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Quote:
Originally Posted by RandomGuy
a friend recomended an electronic boost controller... Anyone know how much those would and should run around... remember my tight budget... any opinions on either manual or electronic... use the savings from manual for other things... or just get an electronic to begin with... he said its not much cheaper than the manual plus the boost guage...etc
The MBC I posted the link to is about $55 shipped. A boost guage is about $60 at your local ricer shop. That $115. An EBC is gonna cost you about double that and then some, even a used one. The cheapest I've seen Profec-Bs running through the local channels were about $250-$275.....
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Old Mar 5th, 2005, 09:56 AM   #7 (permalink)
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hrm strange... i see a S***LOAD of MBC's on ebay for under 15 bux shipped ... lotsa them with "high feedback" ... but a friend said that to have an MBC you need a boost guage so you know how much boost you're running... If you dont mind... does anyone know how much it costs for a boost guage?

Last edited by RandomGuy : Mar 5th, 2005 at 10:18 AM.
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Old Mar 5th, 2005, 10:23 AM   #8 (permalink)
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Well Zen estimated 60 for a decent one, but there's a large selection to choose from.
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Old Mar 5th, 2005, 10:24 AM   #9 (permalink)
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Quote:
Originally Posted by RandomGuy
hrm strange... i see a S***LOAD of MBC's on ebay for under 15 bux shipped ... lotsa them with "high feedback" ... but a friend said that to have an MBC you need a boost guage so you know how much boost you're running... If you dont mind... does anyone know how much it costs for a boost guage?

I got mine for like 35 bucks just to get me going. Autometer Autogage.
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Old Mar 5th, 2005, 10:30 AM   #10 (permalink)
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Originally Posted by ♣AsleepZ♣
Autometer Autogage.
how much¿ heh.... how long to install?
.
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Old Mar 5th, 2005, 12:46 PM   #11 (permalink)
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Quote:
Originally Posted by RandomGuy
how much¿ heh.... how long to install?
.

I said I got it for 35 bucks. Took about 15 minutes to install.
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Old Mar 5th, 2005, 03:06 PM   #12 (permalink)
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Quote:
Originally Posted by RandomGuy
hrm strange... i see a S***LOAD of MBC's on ebay for under 15 bux shipped ... lotsa them with "high feedback" ... but a friend said that to have an MBC you need a boost guage so you know how much boost you're running... If you dont mind... does anyone know how much it costs for a boost guage?
I don't really trust Ebay manual boost controllers, you never know exactly how it will work...... The one I purchased from a legit source has worked perfectly for over a year.
And your friend is somewhat correct, but you should have a boost guage with any boost controller you use. The difference between safe psi and engine damage (at least on the stock fuel system) is about 3 psi, you really want to know exactly what is going on in your engine at all times. Get a boost guage no matter what controller you use.

What brands are these boost controllers you've seen on Ebay? Are they used or new? I certainly would never buy a used MBC off Ebay. $15 is not worth a blown engine.....
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Old Mar 5th, 2005, 11:06 PM   #13 (permalink)
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Quote:
Originally Posted by ♣Zen31ZR♣
I don't really trust Ebay manual boost controllers, you never know exactly how it will work...... The one I purchased from a legit source has worked perfectly for over a year.
And your friend is somewhat correct, but you should have a boost guage with any boost controller you use. The difference between safe psi and engine damage (at least on the stock fuel system) is about 3 psi, you really want to know exactly what is going on in your engine at all times. Get a boost guage no matter what controller you use.

What brands are these boost controllers you've seen on Ebay? Are they used or new? I certainly would never buy a used MBC off Ebay. $15 is not worth a blown engine.....

nah used...brand new... but
sorry i thought you meant the MBC was 35$...
so a boost guage is around ~50 for example right... do you need any additional parts... is the installation really hard? i Ebayed for boost guages... couldnt find anything under 200....

just my luck tho....

1 more thing... THIS IS BY FAR THE MOST HELPFUL FORUM IVE EVER BEEN AT... even though only a handful of active members...good info... for that i thank yall.
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Old Mar 5th, 2005, 11:10 PM   #14 (permalink)
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For modifications I would suggest not using Ebay. You keep saying eBay this and that and the thing is you can get really screwed on there.

As for a Boost gauge google it and I bet there are a bunch. www.amzperformance.com has a few listed and so do many other sites. If you can't find one for less then 200 something is wrong.

You shouldn't need anything extra everything should be included in the kit.
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Old Mar 5th, 2005, 11:10 PM   #15 (permalink)
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Quote:
Originally Posted by RandomGuy
nah used...brand new... but
sorry i thought you meant the MBC was 35$...
so a boost guage is around ~50 for example right... do you need any additional parts... is the installation really hard? i Ebayed for boost guages... couldnt find anything under 200....

just my luck tho....

1 more thing... THIS IS BY FAR THE MOST HELPFUL FORUM IVE EVER BEEN AT... even though only a handful of active members...good info... for that i thank yall.
Check www.summitracing.com for a Autometer Autogage boost gauge. Or look at the Autometer Ultra-Lite gauges. If the boost gauge is going in the center of the dash where the 2 exsisting ones are get the size 2 5/8"
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