Jumbo Boost

[jumbosrule]

SFR advertises 750 whp on the G35 auto tranny. I'm sure they can get the FX tranny near similar numbers.

The overheating sounds like maybe the coolers should be re-oriented. I didn't read the whole thread. Are these oil or coolant cooled turbos?

So Speed Force Racing does have a 5AT build that can hold more power. I looked into it and decided if I ever blow my level 10 built tranny, I'd switch to SFR. Ray's post above is talking about the level 10 build. SFR actually sold a 5AT to another local FX owner here in Houston who is now making over 500 to the wheels on a supercharger. SFR was asking $3000 plus core swap. I have always said if I somehow blow the Level 10 tranny, I'll go for the SFR. Not sure I'll have to do that because I built the car for this boost/power level and would have to go to a bigger turbo to get past 500whp.

Overheating was a blown head gasket. After replacing the entire short block and head gasket, temperatures have been rock solid. The turbos are oil cooled, and the motor uses an aftermarket oil cooler.

 

[raymond]

It's because of our drivetrain weight that the transmission is limited. One way to get more power would be to get a light weight drive shaft and the lightest wheels you can find.

By the way why did no one ever looked into our drive shaft anyway.......i cannot find any communication here on that.
Is it by any chance the same as any other Nissan/Infiniti we know. I know the 350Z already has a lightweight drive shaft......is ours so much heavier.....??

Using an already exhisting shaft would be much cheaper then letting on be custom made i gues.

Found these guys: http://www.driveshaftshop.com/

 

[rookie]

FX has a different flange at the diff, we also have a center bearing in the driveshaft. Z is 1 piece and shorter than a G.

 

[raymond]

FX has a different flange at the diff, we also have a center bearing in the driveshaft. Z is 1 piece and shorter than a G.

Hmmm so custom it would be then......:wub:

Will the 350Z Diff fit our drive shaft then as i have that lying here ready to mount soon....??

 

[rookie]

You would need to swap flanges. It's not difficult.

 

[raymond]

You would need to swap flanges. It's not difficult.

OK perfect cause i already bought a bunch of stuff......

Swap the flange at the shaft or at the diff...??

 

[rookie]

At the diff.

FX


G/Z

 

[jumbosrule]

So I did my own research on a driveshaft and I found a place in California (of course) that does custom driveshafts out of carbon fiber. About $1800 US. The guy that built my FX at Powerfab Auto did this for his own G and said we could easily get one made for the FX in the proper length. Our Stock shaft is around 70+ lbs and the CF shaft is around 20 lbs.

I've never contacted the company because I just didn't think it would be worth the expense. Again if I were building for a higher power goal I might have decided differently.

 

[rookie]

acpt http://www.acpt.com/driveshaft/index.html

They are in Huntington Beach. Have talked to them about it, they wanted to see the diff flange and oem one for a week or two to do it.

 

[raymond]

acpt http://www.acpt.com/driveshaft/index.html

They are in Huntington Beach. Have talked to them about it, they wanted to see the diff flange and oem one for a week or two to do it.

Thanks for the pics Viet. Did you still use the FX driveshaft or swap that out when going M/T.....??
Are you and Brad and say John interested in such thing...?? Maybe we can ask a little GB pricing and can arrange production of one. Thing is that this won't stress out the current A/T tranny that much and i already have all that stuff lying around so buying another tranny is just not what i am looking for.
I also understand due to the weight loss the whole system would react more quick as well.....something wich a build tranny doesn't offer so there is still something to gain down that road then just more HP i gues........

Any takers.....?? :wub:

 

[jumbosrule]

Ray, I'd be interested if the price makes it worth it. John has AWD and can't use the same driveshaft as RWD. I would donate my parts for development but I'm not able to take down the FX right now.

There are other HUGE benefits to the composite driveshaft besides what you are saying - one of those is a, "torsional spring rate". The entire shaft does flex a bit, acting as a giant dampener for any shock in the driveline. It also absorbs vibration better, saving bearing life on both ends of the system.

Plus it is straight up baller...

 

[raymond]

Ray, I'd be interested if the price makes it worth it. John has AWD and can't use the same driveshaft as RWD. I would donate my parts for development but I'm not able to take down the FX right now.

There are other HUGE benefits to the composite driveshaft besides what you are saying - one of those is a, "torsional spring rate". The entire shaft does flex a bit, acting as a giant dampener for any shock in the driveline. It also absorbs vibration better, saving bearing life on both ends of the system.

Plus it is straight up baller...

I did not know the drive shaft of a RWD was Different then a AWD. Makes sense though. Thought it would only be different when having a front wheel drive and then going AWD.
Should we put a feeler out there if any other performance buys with a RWD would be interested or not.......??

 

[raymond]

So no interest.on the shaft guys...??

Sent from my GT-I9100

 

[jumbosrule]

Ray - I'm interested in the shaft! Maybe we can find something at SEMA to get the ball rolling?

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Had an issue pop up. Driving the car around a couple days ago, I heard a faint metallic pop and what sounded like a big ol exhaust leak roared into existance. It got ridiculous loud (like when my muffler fell off my Miata). Immediately stopped and checked out the car the best I could. Could not find any broken pipes or loose connections. I was able to build minimal boost, so I was pretty positive there was something wrong on the hot side of the turbo pipes.

After getting it up in the air it was easy to see than one of my 02 bung plugs had somehow worked loose and come off. Replacing the plug solved the issue immediately. Never had any lights or warnings, the car just felt limp until that plug was replaced. Glad it was only a $3 fix!

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I have also replaced my oil catch system yet again. The previous design allowed vapors through the breathers and got the engine bay pretty dirty. We are now moving to a dual catch design with vacuum lines attached between the intake air filter and the turbo's compressor. The PCV valve has been drilled out and both lines are unrestricted.

Last month I mocked up the new design and it has been running in my car like this:



Yesterday I finally got around to having a permanent mount made for it and installation should be today. I'll post photos just as soon as I take them.

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Finally, I plan to take the FX to Royal Purple Raceway this Friday (Oct 7) to lay down my first 1/4 mile drag time. Hoping a couple other guys will want to join up because I'm a total noob to the dragstrip. Excited to see the results on paper though. Anybody want to hazard a guess?

I'm HOPING somewhere between 11.7 and 12.3 seconds. Not sure how realistic that is.

 

[raymond]

Ray - I'm interested in the shaft! Maybe we can find something at SEMA to get the ball rolling?.

Are those guys from cpt also @ sema you think. Or we could just contact them for a quote....... Viet are you interested....??
Further that pvc valve you made open. You mean the one at the valve cover right? What is the benifit off opening that up....??

 

[rookie]

6MT trans is different length than 5AT, I modified my oem shaft already.

 

[tchuck]

...
Finally, I plan to take the FX to Royal Purple Raceway this Friday (Oct 7) to lay down my first 1/4 mile drag time. Hoping a couple other guys will want to join up because I'm a total noob to the dragstrip. Excited to see the results on paper though. Anybody want to hazard a guess?

I'm HOPING somewhere between 11.7 and 12.3 seconds. Not sure how realistic that is.

13.2-13.7 is my guess. What psi will you be running?

 

[jumbosrule]

12psi - I've never changed boost levels.

New OCC setup, finally happy with it.

 

[tchuck]

12psi - I've never changed boost levels.

...

Huh. I thought I remembered you talking about different boost levels. Maybe you just meant that you have an iron will and modulate with the gas pedal...?

I like the new catch can.


Sent from my BlackBerry 9800

 

[raymond]

6MT trans is different length than 5AT, I modified my oem shaft already.

Yeah understandable. Is it steal or CF as well....??

Heard a story of a guy breaking his CF shaft on a EVO i thought. So no issue free i gues that way also.........