I have searched and read and know alot of people never post and alot of info never makes it to the org. Has anyone ever done or knows someone that has done this setup either dyno'd or tracked the car.

I read alot of old threads and they kinda leave you hanging or my search skills just suck. I read about the nismo heads with 3.0 combustion chambers and seen it was good for 12-1 cr with stock pistons and 13.X-1 with aftermarket and got me to thinking I have a crap load of parts sitting around.

I was thinking about taking a 3.5 shortblock, cleaning up the casting flaws and very light porting on some 3.0 heads, throwing in some jwt knockoff cams and hr valve springs, meth with either a dek uim or de usim with a sheet metal pelnum and a pftb just to see what is does.

 

btw, if you don't want to post feel free to pm me

 

3.5 block with ported heads, cams and 00vi would be nasty

 

Ported 3.0 heads*

 

i sold my s1s a week ago too.so far everybodysays go full 3.5 t637 sent pm

 

^ been there done that + alot of people are followers ^

want to try something different since I have the parts sitting around but honestly I would not suggest going out and buy the parts to try this

 

The main reason why people don't make the hybrid is the fact that the VQ35 heads flow better. At least I think that is the reason. lol

If you can make the VQ30 heads flow what the stock VQ35 heads flow, then you will be in good shape. Should make some nice power with the higher compression and cams.

DO IT!!!
I'm interested.

 

From what i hear the 3.5 heads out flow the 3.0 heads by so much that u can take the heads off a 3.5 put them on a 3.0 and even thou compression will fall a bit it will still theoretically make more power.

I think if u put that to the test in RL it will make less but people and their theories.

 

I highly doubt that, more of hear say and people talking out their azz. 3.5 heads flow better but 3.0 heads flow pretty good too. remember they can make power to 7k easy untouched and with very little work should be make power on a 3.5 with a 72k also. dont forget dandymax was making power all up there and felt it would continue to 8k

now if you want to rev to 8k thats another story but what I really want is to hear from people that have done it cause they ARE out there

 

Here is some data on VQ30 vs. VQ35 head flow.
http://forums.maxima.org/all-motor/3...flow-data.html

The VQ30 exhaust ports actually outflow the VQ35 exhaust ports. Intake ports are a different story though.

 

pathfinder heads

 

the only problem is I was going for a cheap bump the CR which means I would have to replace the pistons if I go with these heads. Plus I already have 3.0heads in the garage

 

I know some of the south florida guys have played around with this setup. Anyone know the results

 

Shoot Essential1 a PM, he knows some people who have done this.

 

We got a car down here with a 3.5 long block, ported 3.0 heads, 3.5 cams and FWD VQ35 intake manifold. It also has a JWT ecu with 7000k rev limit and OBX 3.5 equal length headers down to just a 2 1/4" exhaust. It's pretty quick. It runs side by side with another local max with:


* SSIM
* VQ35DE block and heads
* VQ35HR valve springs double-seated
* Debuloz Ebay JDM cams
* Intake cams clocked to full-retard CVCT position of ~64*
* 3" catback
* custom longtube equal length headers
* Emanage Blue tuned
* 3" MAF

(some might remember whos car this was)

00vi deffinately makes less power/tq than an 02IM on a 3.5 block. When he had the 00vi on it, he dynod around 240whp. havent dynod the new setup yet, but it is seriously way more powerful with the 02IM. There is no denying it that the 00vi was choking up the motor. Even the intake note sounds different.

Both cars love tripple digit spray by the way.

 

^that sounds tasty!! both cars. i'd like to see numbers of the Frankenstein (3.5 block 3.0 heads and 3.0 block 3.5 heads) always assumed it'd be stupid to use 3.0 heads on a 3.5 block, but buy the sound of it...i'm wrong

 

Mmmm so maybe ditch the 00vi and make a sheet metal intake

And track times on the hybrid setup ?

 

Setups like these very rarely make it to the track lol.

 

Maybe I should give Tilley a call ?

update: crap the # I had on him is disco

 

Long tube headers on a fwd car? Wonder what they look like.

Good luck with the build. Should be very interesting.

 

Long tube headers on a fwd car? Wonder what they look like.

Good luck with the build. Should be very interesting.

 

Not saying the 00vi is a bad manifold. It's just that it doesnt have enough volume to keep up with how much an internally bone stock 3.5 can breath. Research what SG motorsports did with their bone stock internal 350z on the dyno. This is why ITBs are so benificial to us. Our motors even in stock form need as much open space both on the intake and exhaust side.

True... lol. Although, when he finally made it to the track and the MAF died during the first run and he ran a 13.5

And as far as the cammed one goes, we've been to the track about 8 times... but it either rained, blew a tire out, lost 3rd gear, seized up the release bearing, snapped an axle, etc... Something doesnt want us going to the track. I tried going with my car 2 weeks ago and it started misfiring.

 

When refering to longtubes, we are just talking about this...




(my hotshots)

VS. shorty designs such as these...

 

i want to know why the long tube headers flow better than the shortys...serious question, and if it takes this thread off of course, i'm sorry in advance.

 

Yeah this would definatly take the thread off course but in my mind I would say because the merge is further back allowing the exhaust to gain more velocity. This could be completely wrong but its just how I see it.

 

3.5 block and 3.0 heads and a 00vi or mevi will be the way to go. it will raise the compression which means more power so do it lol. there was a guy on here that was beating regular 3.5 swap maximas in his 3.5 block and 3.0 heads with a mevi and he ported and polished the 3.0 heads

 

interesting hypothesis.

 

Thanks essntial. When you said custom it through me off thinking they were custom fabbed and longer then hotshots design.

 

I think they're around 330hp now

 

Yeah I remember that thread. Havent checked up on it in a while.

 

oh I either didn't read or didn't really register what your 2nd paragraph said. I thought you were turbo.

 

It has to do with exhaust pulses and tube length. When a cylinder fires the suction created after the collector helps to pull the exhaust gases from the next cylinder thus clearing out the cylinder for a better burn also the longer tube helps hold the heat and burn and make which makes more tq and mid range

But your right not really what this thread is about

 

Your correct I am turbo but also planning to make a n/a maxima next year

 

you remember his trap speed

 

If i'm not mistaken, I know who your talking about and that's the same motor that is in the car that I'm refering too. It went from 00vi to FWD 3.5 IM and it is significantly more powerful.

And if i remember correctly, kevin recently dynod the sentra w/ ITBs again with bigger exhaust and it's a little higher than that. . Completely different build though, but just showing that these DE's have more left in them all motor.

 

dont recall

 

What? what is this sheet metal plenum of which you speak? Are you designing something sneaky? Inquiring minds want to know.

 

I was planning to take a 3.5 uim and cut off the plenum and make a new sheet metal plenum and elbow for boost but I popped the motor.

Now I have to rework the #'s for a dek and will just cut off the flange from a de uim and make new runners, plenum with a 3.5-4inch diameter elbow that bolts up directly to a pftb

 

That would have been great as far as the plan you had to cut up the 3.5 UIM and make a sheet metal one. I consider it proven that the 3.5 UIM provides uneven flow distribution between both banks. I would stay away from it if possible.

 

If I still had the 3.5 version #1 of the intake would have been done this winter. I'll have more info about a 3.0/3.5 hyrid intake towards the summer