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.

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.

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.

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.

Is there a story behind this ? :tup:

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.

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

Lol. No, it's real.

thats to awesome man lol

I was street swiping for the rest of the guys.

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

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

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.

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.

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

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.

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

That's correct, Jay.

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.

Can you share what mods you're planning to do for cooling?

I would like to hear from track drivers

I thought they got it more under control when they added more oil reserve to the system and modified the front bumper?

Jay was a good guy!

his oil cooler was the size of our damn radiators!

I think they may have. It was a NASCAR style oil cooler.

Mine literally is the size of my radiator... almost.

It's like 28" x 14" but only a half inch thick.

With the motor pulled I'm shaving the first fire wall in hope it won't trap heat and allow the heat to flow out the vented hood and cowl area. On top of some more ducting, GTM's bigger oil pan, and my 34R cooler. Ill add another if I have to.

Have you thought about doing the vented fender liners on each side, so the air will flow on the edges of your stillen front straight through and out.

I have a lot of plans in that area just time and money is always a issue. Defiantly custom.

I dont understand why your going FI either on such a dedicated track car. Even if you plan on not producing crazy 450-500 hp and more like 400 something in order to save engine and keep temps down...isnt it the added weight of a tt kit negate a +50 hp bump? Thats what I was always worried with going FI, heat issues, and the obvious power to weight ratio. Adding 100hp with doing a tt kit on a na car isnt the same as adding 100hp to an already boosted car since the naturally FI vehicle already had the weight on it and in some instances you're actually using lighter than stock replacement parts.

It is not always about the top end HP, you have to look at the new power curve and when you have usable power, great TQ levels, but you do have to weight the weight side (especially since it is all front).

Like the engineers of the GTR said one time on TV. Anyone that thinks power to weight is a issue than there amateurs. Lol. Why do you think the GTR is a beast? On paper the HP/ weight ratio shouldn't do what it does.

But yea. It's the way power is deliveried threw the ban. I was getting my butt handed to me by Porches that had the same power as I did.

True but thats because GTR has A LOT more engineering behind every single little component of it. So that doesnt really apply to a 370z that has NONE of that suspension, torque vectoring diffs, AWD, super computing, etc technology. But like Shamu said I think the best way of doing a TT 370 would be to swap in the gtr powertrain. A set up that came that way from factory and will be consistantly reliable.

I ran with a 500whp stillen supercharged 370z at the track 2 weeks ago. Thing couldnt pull on me in the straights.

Allthough, if you can pull this off and the car runs great, I will be VERY impressed with ya. Your car is already one of the top 3 impressive 370s I have ever seen. Good luck!

No offense to Stillen SC owners but the kit has no TQ and unless you are talking a mile long straight that kit will not do much above a well built track 370z because of weight and power curve.
The TT setups will give Spohn better TQ, more power under the curve and with his heat management he will be fine. Will the engine last 5 years? Probably not, but honestly unless he is running endurance races he should be good for his track days.

The GTR is built seemless and thus why it holds together. I'm not worried. What happens happens. I will always try to learn and improve. I won't ever give up on this plateform.

As far as the car that couldn't pull on you. That can be so many different things. Mostly driver. But it's also a supercharger. Lol.

I like the idea of doing track-car engine projects in general. Someday my car will have an LS3, which is about as daunting as a track-reliable TT project. More work, maybe slightly less risk. But really, that's all about enjoying doing the work, it's not so much about making lap times. I pass guys in Z06s and Porsches sometimes. Sometimes I get passed by a Miata. Whether I upgrade my engine isn't going to have a huge impact on that. At least, not as much impact as upgrading the driver.

Yea, the need to up-grade the nut behind the steering wheel as I was told by my driving instructor.

I'm going this route for sure.

LS3 + a mild cam upgrade with longtubes, cone filter intake, you're talking about close to 450whp without doing anything to the reliability of the engine, which at this point, is pretty damned reliable.

And it's the same engine that's been in how many cars over the last decade? Parts parts parts galore. I can't wait. I'm fairly sure it weighs the same or less than the VQ37 as well, so that'll be awesome.

As much as I could do this I just can't get passed the sacreligious side of it. A Nissan V8 but defiantly can't put a Chevy motor of any thing else.

I hear ya, but until Nissan has an affordable V8 that can do anything close to the power the LSx can do, I'll just have to get over it. :-/

I know what you mean but every time I hear Nick's car at ZDayZ I get some tingling in my pants. :)

Holy ****! What a nice build. Beast.

Your not kidding
Thanks.