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Old 03-10-2010, 01:11 PM
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Default FI-R: Turbo VQ35 Spec V.. fire up video!

Finally settled on a setup that I like (scrapped two previous designs), and got it all fabbed up..

Got it cranked up yesterday.. I still have to install the meth injection kit, fans, gauges, and misc. stuff, but, it should be driveable this week.
Travis

This thing should spool up at around 2500rpm, and make ~400whp @ 7psi. This is our new CNC profiled compressor wheel, with a T350 turbine, in a .63 A/R T3 housing, and .60 A/R T04E compressor housing.

The goal was to build a super-responsive setup, with minimal lag, and a HUGE powerband, with tons of area under the curve. The piping length sorta inhibits our goal, but, we'll see how well it turns out.

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Old 03-10-2010, 01:14 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

The way the piping sits in that vid is that permanent?
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but if the car does not run, and i have the key in my pocket's pant, the fog can be rest open
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Old 03-10-2010, 01:17 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Yes.. it is.. why?
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Old 03-10-2010, 01:18 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

i dunno if im seeing right but no i/c?? or you plan on using water-air?
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Old 03-10-2010, 01:18 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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Yes.. it is.. why?
Just wondering why you chose not to use an intercooler.
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but if the car does not run, and i have the key in my pocket's pant, the fog can be rest open
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Old 03-10-2010, 01:23 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Using only meth for cooling it seems...
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Old 03-10-2010, 01:24 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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Using only meth for cooling it seems...
imagine the responsiveness from that turbo.... mmmmm....
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Old 03-10-2010, 01:25 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

No intercooler..

We're going to run methanol injection, which is a great means of "chemical intercooling"..

By using a water/meth mix, instead of a traditional intercooler, there are huge advantages:


Methanol (when it mixes with the gasoline, passing the injectors), increases the NET octane to about 96-98, at a 50/50 water to meth ratio. This makes the engine less prone to detonation, and allows more aggresive timing advance.

Water vapor/mist pulls heat out of the intake ports, combustion chambers, valves, etc.. and helps to cool down the charge air temps.

Less/shorter piping means A LOT less lag, and better transient response.


There are people running 100% meth, and 20+psi, with no other means of intercooling. The only downside, is that you have to fill the tank up.. However, we will be using regular old windshield washer fluid (40% meth/60% water), and it's available for 1.50 a gallon. That should last a week or so.. depending on how heavy of a foot my customer has.

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Old 03-10-2010, 01:29 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

^^^That's great, I never knew it lasted that long, I thought a gallon would last a couple of hours at best.

Question, if the tanks runs dry and the driver doesn't know or isn't paying attention, does the motor go "boom"?

I mean I guess he will monitor his EGT's etc...
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Old 03-10-2010, 01:31 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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^^^That's great, I never knew it lasted that long, I thought a gallon would last a couple of hours at best.

Question, if the tanks runs dry and the driver doesn't know or isn't paying attention, does the motor go "boom"?

I mean I guess he will monitor his EGT's etc...
There's a warning light for when the meth gets close to empty. Even if it DOES go dry, at 7psi, he would have to really hammer on it to blow the motor.

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Old 03-10-2010, 01:32 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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There's a warning light for when the meth gets close to empty. Even if it DOES go dry, at 7psi, he would have to really hammer on it to blow the motor.

Travis
You've thought of everything haven't you.
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Old 03-10-2010, 01:32 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

ahhhhh, ok cool... you dont usually see boosted street driven cars without some sort of intercooler. but sounds good to me lol
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Old 03-10-2010, 01:37 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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ahhhhh, ok cool... you dont usually see boosted street driven cars without some sort of intercooler. but sounds good to me lol
While it is true that the main idea for intercooling has been the air to air cooler, it's honestly the least efficient out of the bunch.. especially on a street car that gets driven in traffic. Meth injection is 100%, every time.. no worries about heat soak, and variatons in effectiveness. With meth, you can tune around a constant percentage of effectiveness, and not have to worry about it.

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Old 03-10-2010, 05:03 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Hmmmm interesting but you're right about the massive advantage of meth vs. Air to air intercooler. Nice build man that car is gonna rip.


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Old 03-12-2010, 01:42 AM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Pulled my hair out for most of the day, trying to diagnose a misfire problem at idle, and on tip-in. Turns out, the MAF didn't like being so close to the turbo and/or the pipe going from 2" (turbo outlet), to 3", in about 12", created a weird flow pattern across the element. So, I had to rework the charge pipe, and set the MAF back before the turbo (draw through). After some cutting/fitting, everything worked out great, and the problem is solved. I buttoned up the return fuel system today, as well, and it's now running on that setup. Tomorrow, we will probably get to drive the car late in the evening. I'll shoot some video footage if we get to that point.

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Old 03-12-2010, 01:48 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

How much cooler does meth make the IAT? Highway crusing in about 40* weather i see about 60* IAT w/ my intercooler.
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Old 03-12-2010, 01:54 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Man that looks nice. Where is your shop located at?
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Old 03-12-2010, 01:58 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

Louisiana iirc.
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Old 03-12-2010, 02:03 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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Louisiana iirc.
You are correct sir.

You sure know you're shit Travis... if I ever do anything crazy with my whip I be headin' for Cajun country. I'm glad to see someone make a name for the Nissan/Spec community. You are a master of your craft.
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Last edited by OrangeUaVol; 03-12-2010 at 02:06 PM.. Reason: Edit: Props to Travis
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Old 03-12-2010, 03:24 PM
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Default Re: FI-R: Turbo VQ35 Spec V.. fire up video!

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How much cooler does meth make the IAT? Highway crusing in about 40* weather i see about 60* IAT w/ my intercooler.
Well, cruising, the temp should be about the same as ambient, with a slight warmup, depending on where you draw your air from (into the turbo), and how much piping is exposed to underhood heat. We're pulling air out of the driver's side bumper, and have a very short route to the TB, so, I'd say that IAT's will be close to ambient.

In boost, the cooling factor will be constant, although, immeasurable, because most of what's going on, in terms of cooling, will occur in the plenum/runners and the combustion chambers (with the only variation being heat soak from the 20" of piping, from the turbo to the TB, and the intake manifold itself).

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