SPOHN'S Journal II Track Demon Reborn

Sh0velMan

From all the evidence I've seen, and from my own knowledge of the FI headers... I think they are tiny for this engine. They seem to fall on their *** @ high RPM as compared to PPE and the Momentums.

Just anecdotal evidence there though.

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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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sixpax

Is there a story behind this ?

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SPOHN

Not really. Just coming back from riding the Dragon at ZDayz and they just happen to be cutting a lot of thick grass on the side of the road. So the two cars in front of me were throwing it up and my grill was catching all of it.

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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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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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