complete engine overhaul questions.

Cmike2780

I think the OP wants to mod this engine like it was from a classic American muscle car, and i guesss thats okay to a degree, but Nissans approach is different because the design goal was different. I get the fascination and draw to NA, but there is nothing "simple" about a properly built FI motor. No one in their right mind would say the Veyron w16 engineers took the easy route going with turbos. I dunno, I love the sound of NA engines, but ours sound like a can I rocks to begin with. If anything, the turbos drowns out some of the noise.

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fuct

OP, sounds like you have waaaaay more important things to stress about than a silly car.

best of luck to you though!

FL 4Motion

at the end of the day, you gotta do what makes you happy, if the OP wants to blow his wad trying to build a super crazy N/A monster Z, more power to him. There's def easier, cheaper, and more tried and true ways to do 500whp (TT or stage II s/c) but hey, I'll be the first to say if it happens, I'll be pretty excited to see it cause I think n/a builds are neato as well.

roy'sz

First mod I would do in his situation is the stage 3 J.O.B. Just sayin....

vividracing

LS1 swap.

/thread.

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theDreamer

Fixed.

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Jeffblue

yea word... if you want v8 NA power... you need a v8. pretty much sums it up.

vividracing

Well he mentioned $9500 to get an old AMC built up, so I figured a budget of around $10k. Even an LS1 swap is going to break that figure unless he does a lot of work himself.

If money isn't an issue, then yeah a cammed LS7 with upgraded valve train and an intake would be awesome.

My Civic smokes 'stangs all day!!

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b1adesofcha0s

Lambo V12

/thread

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roy'sz

Bugatti veyron w16....that would be pimp!!!

b1adesofcha0s

Well the Veyron is quad-turboed so I don't think it would make the OP happy. Maybe if you just took the engine.

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roy'sz

^^hahahaha nice!!!

chii370

if it would fit w/o mods i would take it lol. VQ doesnt seem to be a very user friendly engine thus far. its not that it wouldnt make me happy. i just dont want just a turbo. i want an engine that makes no less then a certain amount at any given time.... aka NA. even SC has a power curve, not as delayed as turbos but its still there. turbos are a nightmare when they get older. they dont last nearly as long as the engine. i had a 1984 datson 300zx turbo and then a 1992 300zx after they start to get old, and get miles the tubro is usually the first thing that gives you problems far before the engine decides to take a ****. i have nothing against them, but ive just had bad experience with it. so when my Z hits 150k i dont want to be swaping in another turbine, or any other pricy part on a kit. SC are the same way, the compressor is NOT DESIGNED to last 150, 200, 300k, i think they are actually rated. my guess would be about 60-70k. these parts are designed for a car thats not going to be someones only driving vehicle for 10 years lol. one could argue that a NA build wont last that long ether. not entirely true. most people that build an engine do what to it??? beat it, all the time. at the track and on the street. have you ever tryed building an engine up to TAKE abuse and then not abusing it? except on very rare occasion? like 4-6 times a year at a track? i would love to just slam a turbo on there and get it over with, trust me. its a LOT of power, and its easy. but from my past experience they just dont last even under normal driving conditions, even the little bitty *** thing that came on that 84.

im sure you will find a million examples that will prove me wrong, but point is there are just far to many variables to even make a educated evaluation of whats going to happen. it all comes down to how well you take care of it. i get what you guys are saying and i understand it. im just kinda dead set on seeing if this will work. its not really necessary to poke fun at the guy thats treading the path less taken lol.

As for the swaps, that would be cool lol but its a nissan..... im not a blasphemer thats going to pull the good old 350 chevy in the dodge dart bullcrap. i want the car to be as close to original as possible, thats why i havent touched anything visual on the car and never will. well except maybe all leather interior, with the red stitching and embroidery ...... because i feel nissan really dropped the ball and should have made the nismo in leather instead of there ******* old man touring edition

chii370

and i just noticed jeffblue's avatar pic...... thats totally true, i fell for the trap twice lol.

wstar

Power curve: Even an NA motor has a happier end of the rev range, and the more extreme you mod an NA motor if anything the more curvey it gets. This is a rev-happy engine. If you're not at least at 3K RPM, preferably 4.5K+, you're really not in the happy range yet, you're in the moping around the mall parking lot range .

Now many turbos do make the curve a whole lot more extreme and IMHO less drivable, so I'll give you that. I've never been a bolt-on turbo fan though, I'd much rather choose the SC route for the Z, it's flatter and has better initial torque, and it's just less complicated. The only tradeoff really is a lower peak number than a turbo for bragging rights.

As far as engine life goes, I think a solid SC setup that isn't trying to break extreme barriers will hold up well in the long run. But keep in mind everything is relative to how you treat the engine (maintenance), how you drive it (grandma vs endurance races), and how sensitive you are to it slowly getting bad (things getting "loose" and losing power). An interesting data point: the (surely nearly identical) version of our VQ37VHR that Nissan puts in the race version of this car is listed as having a maintenance replacement interval of 3,700 miles.

Granted, that's track miles, they're shooting for the moment it begins to loose any noticeable power, and they probably lowered the number a little to increase engine sales. You can probably get a few hundreds K out of this engine daily driving on the street like a grandma, but otherwise you're looking at overhauls/replacements at some point regardless. There's no free lunch on an engine. Every mile you drive, something is slowly wearing down

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