Craig Mack

Would it be possible to bore and/or stroke the 3.0L VQ to a higher displacement? They have stroke kits for cars like the mustang V6's that increase them from 3.8L to 4.2L for around $500. What kind of advantages would this bring besides a throatier exhaust note? It would be nice to have a 3.5, or even a 3.8L 4th gen. VQ. A 4.0L or higher would be rediculous...

mtrai760

iTrader: (19)

Anythings possible with the right amount of money... I believe the max the VQ can be stroked to is 3.2, but I could be wrong...

SkylineGTR

u can use the VQ35DE crankshaft, and up the displacement to 3.3L, but u would need different connecting rods and pistons to keep the existing compression ratio, using just the 3.5 crank could end up increasing compression to 11:1 or something around there, and could cause all sorts of codes. Also i dont think the bore can be increased without cooling problems.

Nealoc187

iTrader: (23)

11:1 CR sounds good for me and the other all motor guys Heck lets go 12:1

NYCe MaXiMa

iTrader: (9)

yea
it has been done too if i am not mistaken..

mtrai760

iTrader: (19)

I read that stillen did it on their PGP Pace car, but I don't have the link anymore...

soundmike

iTrader: (24)

Yep, i read the same thing a couple months ago. I just can't remember who.

Nismo87SE

I say buy a VQ35DE and go from there. Have you seen the cost of building a motor? Its more than buying a used engine. Rod, main bearings + crankshaft would require work. Then your going to have to get different rods + pistons, have the block bored/honed. That stuff adds up.

NickStam

iTrader: (3)

The car that Mardi bought from Steve in Philly, and I think Rich's car (yellow max) are stroked (3.2L).

gtr_rider

iTrader: (50)

Lime

I don't think so...you wouldn't want to run boost on even higher compression, Nick, and he's SC.

Anyway, it's possible to dome a small amount, but you need to copmpletely reprogram the ECU for anything serious.

Black VQ

As it was mentioned earlier, to look into just getting a VQ35DE block. The blocks should be pretty much the same, as far as external dimensions so.

Now here's the part where I'm probably wrong. We know that the drive-by-wire throttle system would be a major pain to try and adapt to older Maximas. The same might go for the CVTC. Instead, the VQ30 head could go on the VQ35 block, and I think it might eliminate the problem. If the piston/valve clearances are okay, the 3L head and 3.5L block should work together...uh, I think.

Craig Mack

Would boring it out to 3.2L make any noticeable differences in exhaust note or power? And if so, how much of a difference and how much $$ would it cost?

And I remember Mardi telling me I could just drop in the 3.5L block and it would up my VQ to 3.5L. I think he said I could just do that without changing anything else and i'd be OK. I sure hope that'd be the case, but SkylineGTR makes some good points.

How much would a 3.5VQ block run me from a junk yard?

MaxSpeedSE

iTrader: (3)

Dident don in texas bor out his motor, and say he saw no gains what so ever ?

mtrai760

iTrader: (19)

No, he got his exhaust manifolds extrude honed and only didnt really gain any power.

Sprint

iTrader: (10)

Steve lied to Matt and Rich's car is still 3.0

nismo2020

iTrader: (1)

don threw up the specs of a vq30 vs vq35 a while back
check the search.

Black VQ

You can't bore it very much. Anything more than by .2L probably isn't a good idea. With the aluminum block, it just can't handle that much. The block might even be weaker after the overbore, due to the stress involved.
Stroking would definitely be easier on the engine, because you're just replacing parts. The key, like others have mentioned, is watching the resulting compression. If it's too high...ping, ping, BOOM!
The most trouble free route, imho, is to just get the VQ35 block. You'll not only have a block that was bored to 3.2L from the start, but you'll have the .3L of stroke too. There's less stuff to take apart, as well. We all know that the more stuff you take apart, the more chances you can mess up putting it back together.

SkylineGTR

well u can pick up a spare VQ30DE for far cheaper than any VQ35DE, so it could all work out. Pick up a spare VQ30DE, get a VQ35 crank, and heres a possibility, if using the standard VQ30DE pistons will get u increased compression with the VQ35 crank, depending on how much of an increase that compression is, if its within range, couldnt u just use the Arias Pistons, or the VQ30DET pistons instead, and the low compression piston from that will offset the increased compression from the VQ35 crank, and u might have avoided the whole compression issue.

NickStam

iTrader: (3)

I've seen the stroker kit for sale on a website. it's exists.

Bags

iTrader: (3)

I thought matt/mardi did that comparison

blizz20oma

iTrader: (1)

hehe...Craig, you just need to scratch all your itches in one fell swoop and get a 5.0 Mustang

Craig Mack

Nah...the 5.0's don't sound all that good IMHO. The DOHC 4.6L Cobra's sound beautiful. However, it's not my choice at this time. Gotta keep the Max. I am only 17 and my insurance is still $3000 a year. Imagine what it would be with a GT or Cobra! I'd get raped. My friend with a Lightning pays around $4000-5000 a year.

I plan on keeping this car till maybe mid College or after I graduate, then I will get me some muscle.

Lime

oh really? any URL's?

Maximamike

Sure..

http://www.paeco.com/

NickStam

iTrader: (3)

That wasn't the one, but I'll find it eventually.

MaxSpeedSE

iTrader: (3)

Why even wait that long to start working out?

NickStam

iTrader: (3)

It was a JUN Stroker kit.

I can't find it though

http://www.junauto.co.jp/products/index-e.html

if anyone can read Japanese, look here:

http://www.jun.co.jp/

MAXIN

iTrader: (5)

Craig Mack

I might get 4.6L soon, but the key word is MIGHT.

Dave B

Hehe..you haven't been around many older Mustangs then. The 5.0 and 4.6 sound pretty much the same. It always amazed me that Ford was able to make the 4.6 sound exactly like the old 5.0 even though they are completely different motors. The DOHC Cobra sounds just like a 5.0 until about 4500rpms when the secondaries kick in. The DOHC is a jewel of a motor. I must admit though, I'd much rather have a mint condition 93 5.0 LX hatchback or notchback over a 4.6 anything. The aftermarket for the 5.0 is absolutely insane and cheap. The 4.6 DOHC is quite a capable powerplant, but the useful mods are minimal. 4 cams, 32 valves, and an engine that literally has been shoehorned into the engine bay makes these very tight and extremely expensive. Ruining a DOHC Cobra motor is a $5000 mistake. No joke. 5.0s are dirt cheap. I'll take my black 93 notchback, with the 93 Cobra turbofan wheels, drag radials in the rear, a 3" cowl, heads, cam, intake manifold, headers, larger MAF, full exhaust (though quiet), 4.10s, and fully adjustable suspension anyday of the week. That combo right there is a solid mid-12 or lower setup that can compete in the 1/4 mile and on the SOLO II track and is completely docile around town. You can have all that for about $12000.


Dave

maximaracer28

I just knew this would be about making the car sound or look more like a stang or domestic car...seriously craig many people have said this, if your going to bore your motor to make it sound like a v-8 then its pointless....once again buy a camaro, stang etc with a v-8 and stop trying to make the maxima into one...its annoying each week I read your posts comparing sounds etc to domestic...

Craig Mack

...read my post again. I was wondering if it would add some torque or HP along with a deeper tone.





Read my last post. And I've toned down those posts alot.

Dave B., I sent you an email.

Triple8Sol

iTrader: (29)

Maybe I'm totally off, but isn't the VQ35DE essentially just a bored out version of the VQ30DE block?

Nismo87SE

Bigger bore and stroke.

Lime

heheh broken ol' 5.0's...see 'em at the track a lot. They usually blow up on one of their first passes. Ah well, still nifty sounding cars I guess. If I were going to get a v8 it would be a classic though. Way more fun.

Nismo87SE

modifying a VQ30 would be a waste of time $$ if you want max NA power. The VQ35 would cost just as much but put out way more power/torque. Goto www.car-part.com to find a VQ35DE from a 2k1 pathfinder and 2k2 max/altima.

1FSTMAX

iTrader: (29)

Check this out...

Craig Mack

Black VQ

That's the whole point I've been trying to get across. Option 1: Bore your stock VQ30DE block, you'll spend a lot of $$$ and only have 3.2L.
Option 2: Stroke your VQ30DE, you'll spend a lot of money and only have 3.3L.
Option 3: Do both, spend a ton of money, and you'll have a "poor man's" VQ35DE. It won't be as strong because of the stress that overboring put on the block, and you'll have a crazy compression ratio.

Option 4: Do it the right way by getting a VQ35DE. It'll be cheaper in the long run, and there will be less engine modifications to make it work. The block will be stronger because it has the '3.2L' bore from the start, and not an overbore. And in a 4th gen, you know a 3.5L would rip it up.