700hp worth of interesting

 

Dayum.

 

My free VQ35 cams never arrived...

So I went with the stockers as planned. The timing chain assembly is back on. She turns by hand smoothly. My VQ30 upper oil pan has a 10AN fitting welded in as an oil return for the turbo. The VQ35 windage tray that sits in the bottom of the upper oil pan is different than the VQ30 and I had to mill a few of the baffles on the VQ30 upper down so it would fil properly.

Cleaned up the garage real good and now I am just waiting on my loaner motor hoist... Hey Corey!!!

 

MardiGrasMax,
Cant you use the tomei cams for the 350z?

 

who was suppost to send you the cams, so we can't point fingers and yell at them.

 

ive always wondered this also

all the people i know with built honda engines have at least a block gaurd or have it resleeved $$$$. hopfully the VQs sleeves are alot stronger

 

this could be a quick solutionsince resleeving and block guards aren't an option

block posting
http://www.homemadeturbo.com/tech_pr...block_posting/
this method is even reccomended by race motor builder Larry Endyne, so it does have some serious support behind it

or

using block filler
http://www.homemadeturbo.com/forum/i...?topic=36739.0
this method uses a form or rock salt, but Jegs actually sells REAL block filler specific for this-->
http://www.jegs.com/cgi-bin/ncommerc...77&prmenbr=361

 

The VQ is not a full wet cylinder sleave. Only the top half is wet, and the bottom is where the wiggle happens. I think the hondas are full wet?. If a stocke VQ35 will do 600whp, a built one should do more?

 

more pics more pics

 

Passed emissions testing. I got a waiver because the car is too low to the ground to roll on the rollers! Long block is together, now i just need to do the actual swap.

 

i dont think the stock vq35 will hold more than 400-450 hp w/out scattering. from what i hear its weaker than the vq30. thats probaly why he is building it. what clutch are you gonna use? werent you running a clutchnet before?

 

Yeah are you going to use the same clutchnet? I think you can move the torque resistance up to 600 lbs-tq.

 

I think it's more like 400 hp at the front wheels... http://www.turbo-kits.com/350Z_turbo_kits.html

 

Clutchnet it is. Im gonna more than likley keep the same clutch I have in their now, unless it looks really bad. Dropping the trans to change it aint too bad. If it dosent hold then maybe a 4 puck

 

That is PIMP!!!!

 

he is going to have more than 365-385 whp!

 

I cancel my last post, I guess I misunderstood what Matt told me....

Word to Vtec...

 

Wrong....VQ35s ARE stronger then the VQ30s. You guys are spreading MISinformation. PLEASE STOP!

The VQ35 rods are hot coined VANADIUM STEEL(technology not normally used in production engines...typically race engines), they weigh MORE, and the I-section area is slightly bigger then the VQ30 rods. VQ35 pistons even weigh MORE then VQ30 pistons, but not much for the bore increase.

The REAL reason VQ35s fail is: FIRST because there are a LOT more boosted VQ35s and most are twin-turbo kits producing gobs of torque our VQ30s never see, SECOND because Nissan did try to skimp some weight by using rod bolts without caps(weaker) which they corrected in the 2005 models, THIRD the VQ35s much longer stroke pushes piston speeds up dramatically which causes high tensile(stretching) stress plus bumped the revlimiter up 200rpm.

The far more advance ignition timing is also a factor IMHO.

So, in short VQ35s *ARE* stronger then VQ30s, they are just ABUSED more and more often, therefore people ASSume they aren't as durable. TORQUE kills rods, NOT HP, and that's where many VQ35s are failing. IMHO, drop down the revlimit especially DO NOT raise it to 7100rpm(TS ECU), keep AFR and timing under control, and a stock VQ35 will handle all the torque a 400-450whp TT kit can throw at it. I'd replace the rod bolts though.

 

http://www.airpowersystems.com/350z/...ank_signal.htm

That is the reason a lot of the Zs engines are failing. I saw a engine give out on the dyno at horsepowerhouse here. That was before APS noticed this though. I think APS it the only kit (350z wise) that has taken note of this, the stock vq35 will easily hold the twin turbos are that crank sensor issue is resolved.

 

Sounds like they are not so sure themselves (at bottom of page):

A final point to consider is that the timing scatter problem was only ever encountered on the APS engineering vehicle. It may indeed have been a problem on that vehicle only when used with a forced induction system. The problem may not be present on other 350Z vehicles with other forced induction systems, be they turbocharged or supercharged, however due to the intermittent and transient nature of the problem, APS was not prepared to take the risk of assuming that it was a one-off occurrence - hence inclusion of the APS solution with all APS 350Z Intercooled Turbo Systems.

 

Yeah, I saw that stephen, which I did raise an eyebrow at. But that company spent the money to import a left hand drive, US spec 350Z unwhich to build their kit from, unfortunlely, they only brought one in. I guess that is why there isnt further testing into the problem. I personally would trust the APS kit, and APS as a company far more than any of the other turbo kits for the Z out there. However, considering I don't own a Z, I just put that out there as information. And I've gone away from the 3.5 swap, because of other issues I see as possible, none of which I can prove. So I'll shutup now.

 

AGAIN...more MISinformation. More like a witch-hunt APS used for propaganda purposes.

That is pure BS and even APS can't back up their claim, yet everyone is so ready to accept it.

"the reason a lot of the Zs engines are failing" - please show me the evidence of this. I have read one or two out of 20-30 blown that possibly could have been a result of this, yet NOBODY has had any proof that could possibly confirm a CPS signal issue.

I wish APS wouldn't have diserviced the VQ community by pulling that ONE TIME that they can't even repeat out of their azz marketing ploy.

 

Preach on brotha!

 

Little angry today aren't we ice? Hah, I never said the CPS was causing every case of a VQ35 giving out. I'm well aware of how many idiots out there are keeping stock timing, and putting their rev limiters at 7000-7100, and going out highway racing. I honestly can't prove APS' claim, their shielded CPS might just be a temporary fix for some other issue. But they are trying, however "into the dark" their guiding is. I would hope to god the VQ35 would be stronger, considering we've got what, a 10 year difference between the spawn of the VQ30 in early 1995, and the newest 2005 completely re-done Z engine? I would hope new technologies, new materials, and the further commecialization of whats the norm of "aftermarket" into stock engines would of evolved the engine a little. I say with a J&S, and some head studs, the VQ35 could defintely put down 450, and last a long time. Sorry for commenting, like I said, I'll just shutup now.

 

No..not that way at all.

I'm just annoyed with these VQ35 claims people have been making lately, not just you. Hey, if I'm wrong...PLEASE show me. I love this kind of info, but I'm not seeing WHERE in the hell it's coming from. I only see two, maybe three websites, worth of information so it's only a subset of all the failures, and I could be missing the big picture.

Yes, a lot of the 350Z guys, at least when FI kits first came out, didn't have a clue what in the hell they were doing. They were blowing ATI kits up left and right due to fueling and/or timing issues. Seemed to me a lot of kidiots with WAY too much money that used to drive Civics upgraded to 350Zs without much experience in how to tune VQs. Luckily, there are some smart/experienced guys around over on the one board I visit and now they're well beyond that/us now IMO as far as knowledge/pioneering goes and I learn from their progress. They have a huge growing aftermarket and lots of money to throw around, so that helps whereas the Maxima community had been scraping table scraps for so many years we have refined the SC route pretty damn well. I think many of them could have avoided some of the teething pains by learning from our SC gurus like Mardi/Stephen/Kev/etc..

Anyways, enough "preaching", I just can't wait to see the next level Mardi is taking us too.

 

IN defence of the 3.5 i am reving it just as high as my 3.0 (7700-7900)

 

Yeah but as opposed to most people, you're nuts

 

Grossly over revving is the same thing as grossly under revving and you know that.

 

UPDATE PLEASE

 

Family, church, work.........................................car.

 

a mardi will you hurry up with my motor already, i got a couple indy races to win "

 

This is awesome. As for the vanadium steel, I have some cheap-o, no name wrenches in my garage that are made of vanadium steel.

 

So do some of my fish hooks.

Lighter yet stronger and twice as expensive as steel plus used in Formula engine parts .

 

damn! that is awesome. good luck mardi!

 

I wasn't trying to say that vanadium sucked, just that they use it to make wrenches.

 

Such as ?

 

The hood is off the car... Wifey and kids are going to Grandmas this week and next weekend, LETS GET IT ON!!! or in as it were!

 

Mardi makes me all giddy like a little school girl

 

I cant wait.. 10's are a must,

 

Yayyyy

But seriously...time for some progress here Mardi