Originally Posted by Crusher103

Because that is a stock 370Z dyno, you posted a modified one. Unless you get its Cam timing system i wouldnt expect to see a curve like that. It controls duration and lift. Its just the characteristics of a VQ to drop torque like that. Its really just the characteristic of an internal combustion engine lol.

Anyway things you should know by now, the intake manifold will make or break this swap more than. If your not concerned about appearance do something like sparks. And please dont be impressed only by high reading dynos, that is the easiest way to screw yourself over.

Originally Posted by aackshun

Maybe because it's stock... After a few mods they look like....



And TQ not mattering in the top end? Chas wha choo chiink, it is of my belief that TQ wins races and HP sells cars.

And Aaron's dyno (the one I posted) was the untuned one, when he tuned it, it turned into your typical VQ35, not something I want.

I might have to put this in my sig so I can stop saying it but...

If I wanted a bunch of top end HP with no TQ, I would have gotten a Honda.

Originally Posted by aackshun

I don't plan on having one, even though I'm quite sure I will get extremely similar lines @ WOT, the only thing I plan on having is TQ with my HP.

Yes, I do know... Why do you think I'm getting an Altima motor?

High reading dynojets???? Really??? Either way... Have you been paying attention to what I have been saying the whole time?

Originally Posted by Crusher103

oh btw, Aarons car was tuned, I was there lol. look at where his limiter cuts in, its at 6300rpm, he was going for 7000rpm.

Originally Posted by Crusher103

you are saying you dont want to lose tq on top end, It is quite irrelevant but if its what you want go for it. Either which way you will need some decent cams.

Originally Posted by aackshun

The one I posted was the untuned one... Well correction... Street tuned.



I posted the Blue run because I liked the TQ curve better than his Red one.

//Edit I looked at it again, I like the red one too



Then why save something about high reading dynos when all I'm concerned with is the curve of my power band?

Originally Posted by Crusher103

lol see what im saying. His dyno tune did him more favors in numbers and bragging rights, he went back to his street tune a couple of weeks after he had it dyno tuned.

i think you kinda misinterpreted what i was saying anyway. If you up the compression like i was suggesting(HR pistons&shaved head) its a bump up in power across the board not just a high rpm. If you are gonna do a build you might aswell get some decent cams. Duration decides where you make power, Lift is the amount of power.

But do as you please, my suggestion would be let the thing rev.

Originally Posted by aackshun

Originally Posted by aackshun

- Cams TBD

Originally Posted by aackshun

- Stock Z33 Injectors

Originally Posted by aackshun

- Minor Head Porting

Originally Posted by aackshun

- HR head gasket
- HR Head Bolts

Originally Posted by aackshun

- RU Water Pump
- RU Water Pump gasket

Originally Posted by aackshun

- RevUp Oil Pump

Originally Posted by aackshun

- ARP Rod Bolts

Originally Posted by aackshun

- JWT ECU (Not going to happen till after the motor goes in sadly)

Originally Posted by Crusher103

i dunno if i would consider a rev-up oil pump a waste of money depending on how high he plans on revving. if he is gonna stick around the stock rev limit or no higher than 7k then yea it probably is, any higher thou. Its some nice insurance.

Originally Posted by Weimar Ben

This isn't a first gen motor. Do you have any proof that the oil pump is inferior to the rev-up?

Originally Posted by Weimar Ben

Cams for this motor are expensive and the 07+ Altima motor already has half-decent cams. But this would get you the most gains from anything else on your list. But $1000+ for cams during the Greatest Depression is a lot of cheese.

You need to hang out @ My350z more often my friend, you can find new cams from failed builds for $800 shipped awl dae (problem is, is it the right cams that I need)

Waste of money, it'll get you nothing over the stock Altima injectors.
Unless the 07+ injectors flow more than the -06 ones then no. Plus I can get them for nearly free, good insurance.

Waste of money. These heads flow great stock.
False, the TQ falling off @ redline says otherwise

Waste of money. I don't think anyone has compared the stock 07+ altima head bolts with HR head bolts. If you were tearing down and building an engine, you should use NEW bolts anyways. If you were going FI, head studs would be better. The stock multi-layer metal head gasket is great and almost never fails. The only real difference between the HR and first gen head gasket is slightly better cooling. No difference at all in sealing performance.
True dat, I'll find out when tearing down the motor, but as for now new head bolts are the plan (they're pretty much the same price anyways).
I know this, I need every single degree cooler I can possibly get, my track day @ MSR was an eye opener for me.

Why not use the stocker? My stocker has 190k on it and is still in great condition. The engine oil lubricating these pumps make them last forever.

Revving to 8k could possibly be the demise of a stock water pump.

Another waste of money.
Insurance incase I have to rev to a billion to get the power I want.

This one is questionable. I don't think anyone really knows except Nissan engineers if the 07+ Altima engine has stronger rod bolts or not, but ARP couldn't hurt.
Again, doing the timing chain swap allows direct access to the crank... Why not? They're not that expensive....

Waste of money. The JWT will be tuned for 3.0L injectors and therefore you'll run rich with this ECU unless you can get JWT to change the fuel maps accordingly.
Not if I tell them NOT to tune it for 3.0L injectors.....

As for the Walbro pump...I had my stocker go out and purchased a new pump at Idiotzone or O'Reilly's a few years back and it was actually a Walbro pump inside the box.
Niiiiice!

Originally Posted by Crusher103

i dunno if i would consider a rev-up oil pump a waste of money depending on how high he plans on revving. if he is gonna stick around the stock rev limit or no higher than 7k then yea it probably is, any higher thou. Its some nice insurance.

Originally Posted by Weimar Ben

This isn't a first gen motor. Do you have any proof that the oil pump is inferior to the rev-up?

Originally Posted by Crusher103

True but is there proof its better than a rev-up's pump? I have walked down the unknown path it ended in disaster, i would rather walk down the known but thats just me.

Originally Posted by krazy6

The only thing I request from this build is a good intake manifold. That's the biggest bottle neck other than the cams.

The altima one may work well though. Haven't really seen much from it.

The heads flow a **** load for stock heads.

Originally Posted by aackshun

Something is starving the motor of air north of 6k, I'd love to see spark's intake manifold on a motor with cams, because we know on his setup the IM was not the bottle neck, his TQ still had a nice cliff towards his redline.

Originally Posted by krazy6

Yeah, too bad he sold the IM. He had plans for camming the motor too.

Originally Posted by NmexMAX

Maybe I'll cam mine.

Originally Posted by krazy6

You better!

Originally Posted by NmexMAX

I bought a set 2.5 years ago, w/ double shims, HR springs and an install tool. Puss'd out and sold them about 1.5 years ago.

Now, finances are in much better shape ... so yeah A bit obvious considering I just bo8ught a manifold of this nature.

Originally Posted by krazy6

What cam specs are you going with?

Originally Posted by NmexMAX

Now that I don't know.

Originally Posted by krazy6

Go big!

Originally Posted by aackshun

or......

Originally Posted by NmexMAX

Rod bolts done while engine is still in car = 7500 RPM...

Originally Posted by aackshun

Now if we could get your car some TQ @ 7500 to back up that awesome flat HP curve of yours

Originally Posted by aackshun

or......

Originally Posted by aackshun

You need to hang out @ My350z more often my friend, you can find new cams from failed builds for $800 shipped awl dae (problem is, is it the right cams that I need)

Originally Posted by aackshun

Waste of money, it'll get you nothing over the stock Altima injectors.
Unless the 07+ injectors flow more than the -06 ones then no. Plus I can get them for nearly free, good insurance.

Originally Posted by aackshun

Waste of money. These heads flow great stock.
False, the TQ falling off @ redline says otherwise

Originally Posted by aackshun

True dat, I'll find out when tearing down the motor, but as for now new head bolts are the plan (they're pretty much the same price anyways).
I know this, I need every single degree cooler I can possibly get, my track day @ MSR was an eye opener for me.

Originally Posted by aackshun

Revving to 8k could possibly be the demise of a stock water pump.

Originally Posted by aackshun

This one is questionable. I don't think anyone really knows except Nissan engineers if the 07+ Altima engine has stronger rod bolts or not, but ARP couldn't hurt.
Again, doing the timing chain swap allows direct access to the crank... Why not? They're not that expensive....

Originally Posted by aackshun

Waste of money. The JWT will be tuned for 3.0L injectors and therefore you'll run rich with this ECU unless you can get JWT to change the fuel maps accordingly.
Not if I tell them NOT to tune it for 3.0L injectors.....

Originally Posted by Weimar Ben

I don't doubt it, but $800 is still a lot for a set of cams. The fact of the matter is that we get sodomized on cams for our motors. But it's the only way to make any power at all above stock redline.

It's the only way to achieve what I want, cams + intake porting + gutting the IM, I will have VQ-esque TQ with my HP damnit!!! Screw the rest of the powerband, I only need about 1700rpm of glory!!!! Plus there's plenty of dyno data of 12+whp and like 15+ft/lbs untuned just by camming the motor

More fuel without more air is a fail. Since when do these motors run lean, NA?

Says everyone else who makes decent power

False, that's more a function of the stock cams, intake manifold, and valve timing a lot more than the heads. This isn't like some crappy head on some pushrod motor from the 80s made by drunk and/or high overpaid union members.

I meant to say velocity, I knew you'd pick on me for my poor choice in words.

The VQ35 heads have excellent flow, outflowing most if not all of the world's top performing motors

The 350z, which has the same heads, achieves a 105% VE at some RPMs which proves the heads flow great, stock.

Wow? Awesome, but you still said a very painful word... SOME rpms.... I'm only concerned about 6k+ right now when these motors seem to make the most HP

It's not really going to decrease the overall water temperature. That's more a function of the radiator/fan combo than anything else. Our radiators are a little small for the power output you're talking about. My PSD puts out 300rwhp and it has a radiator that's 2x the area and about 2x as thick as my 4th gen max radiator. And of course a diesel expels less waste heat than a gasser for a given power level too.

I'm not concerned about where the temperature needle lies, I'm more concerned about it STAYING, why not do everything I possibly can to keep this motor cool on the road course?

When I was doing my build, I used HR pistons and a thicker cometic head gasket because I had difficulty getting machine shops to touch the pistons. I used HR head bolts.

I have no intention on changing the pistons, making high numbers is not my goal in a 2600lb car.

If you want to use the OEM HR gaskets, I have some that I'll cut you a deal on.

Sweet

I suppose it's possible, but highly unlikely. There's no reciprocating mass. Never heard of a stock water pump failing because of revs. It's always because of a lack of cooling system maintenance or using the wrong coolant.

I will have to research some more on the Z forums they spend more time about 6k than any of us Maxist over here, the water pump aint that expensive anyways....

Yes, if you're revving the 8k, I wouldn't trust the stock rod bolts. I'm not sure that I would trust the stock rods with ARP bolts. But on the other hand HR pistons weigh less which put less stress on the stock rods. But physics says that velocity plays a much larger role in kinetic energy than does mass. E=.5mv^2

My physics is rusty... But I do not recall that formula... Then again I am a C+ physics student, damn 7am labs....

Ok, looks like you're right in that JWT will customize the fuel maps for the size injectors you specify, but then you have the other issue of timing with the HR pistons. The JWT will kill that motor, you'll have too much ignition advance.

Again, not running pistons at this point in time, unless I have some extremely convincing evidence, adding pistons to this project will not let me finish this before the year is over...

Originally Posted by ampire

Don't want to keep beating a dead horse here, but man, with all that work building the motor it might be less work just to take my advice, do the full ecu swap, put in a stock 3.5 instead, you can't beat stock reliability and if the motor does blow you can put a new 3.5 right in without any effort. Throw on some NWP intake spacers, NWP VIAS delete, ES motor mount poly bushings, while you are at it. The only real downside is getting all of the harness bits and having to switch to a non cable driven throttle body sucks.

Originally Posted by Crusher103

yea but that is boring, lets inject some excitement. Do a full ECU swap and injecting Plutonium for an extra "kick"

Originally Posted by ampire

02-03 ecu swap

Originally Posted by aackshun

And tuning?

Originally Posted by SurraTT

Come see me

Originally Posted by aackshun

Dammit I thought you were offline

Originally Posted by aackshun

Dammit I thought you were offline

GET OSIRIS WORKING!

//Edit don't worry about the tranny, my manager let me have the one here for the lowww lowwwww