SPOHN'S Journal II Track Demon Reborn

wstar

You mean the diameter of the primary tubes at the top? My experience with them is the car seems much better at ~5k+ on FI LTH than it does down in the 3-5K range. Sure that's the nature of the engine, too, but I think the FI's push it more in that direction.

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Sh0velMan

Well, maybe you can measure the primary size and report back? I head always hard they were 1 5/8ths primaries, which IMO is a bit small.

The PPE's and momentums are (at least) 1 3/4. I know that seems like a small difference, but small changes like that make big differences.

That and I'm not crazy about the FI's collector design.

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Megan370z

yeah me too I was told it was 1 5/8 on the PPE but after mesuring it it was in deed 1 3/4 steped to 1 7/8 ( all Outside Diameter )
there was probably a confusion at Inside and outside being told
since 1 3/4 OD is 1 5/8 ID .....

being steped to 1 7/8 from 1 3/4 will result in a slightly better breathing at HIGH Rpm (6000+) but at the cost of a very small lost in the lower powerband.

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simota1

wow dude so thats a real pic? i thought that was photoshopped

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SPOHN

Lol. No, it's real.

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simota1

thats to awesome man lol

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SPOHN

I was street swiping for the rest of the guys.

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Sh0velMan

You're doing this or something like it, right?

AAM Competition - Nissan GT-R, 370Z Turbo Performance Specialists

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Shamu

Highly recommended especially on a FI car. I'm running a custom made AAM fuel return and regulator on my car.

I'm curious which forged internals are you going with for track motor spoon? I wasn't willing to risk my stock internal motor on track so pulled blower off until I can build proper engine to handle increased heat and stress. Want to get a sense of what people are doing to beef motors up for FI on the track.

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Grant

SPOHN

This is pretty cool simple mod for a RFS. Never knew they had one using stock fuel rails. Usually you don't need a RFS unless over 600whp+.

Shamu, I'm not going to be running a built motor yet. Something happens, it happens. Ill be ready. But these cars can handle a lot FI on lower boost settings. It's the heat ill have to see about.

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Shamu

VQ can handle low amounts of boost in street and ax situations. I haven't seen a single boosted VQ engine last on track. You're probably looking very limited motor life without forged internals and major cooling efforts. Why not prepare yourself now rather than face inevitable later in the season? There's a reason I'm not running blown motor anymore. Wasn't willing to spend money on rebuild yet. Oh well you will have some short term fun! I guess you could just replace motor with used one from junk yard. To build proper FI track motor you're looking at $20 k easy. That's why I'm saving my pennies for GTR motor that will run stock or even less boost. I will be interested in how long a stock motor lasts on track with turbo though its a cool experiment. Bets? I say 6 track days.

You need RFS and fuel regulator with most any boosted application. Marketing from companies selling turbos and non RFS fueling systems will tell you otherwise but don't believe them. Stock non return system isn't designed for any level of tuning in my opinion. You will always be compromised without return and a proper regulator.

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Grant

theDreamer

I am curious to see how your car performs under boost while at the track.
Most guys so far have been SC.

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SPOHN

There was another guy that was hardly ever on here that tracked his FI TT kit on the track. He had a 500+ WHP on a Greddy kit. He would over heat the oil after 8 laps and he had a Hugh oil cooling system with no luck. So far as the motor itself and the longivity is another question.

I don't plan to run that much power on the track but heat will be a issue and I'm working on several mods to help add this. Then ill go from there. I ultimatly plan to have a Time Attack car so heat issues won't be all that much of an issue. Ill just have to see where my car takes me.

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theDreamer

Are you talking about the white Nismo that FP built, fully caged, gutted, etc?

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SPOHN

That's correct, Jay.

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