While this might not be exactlly correct info vs actual dyno numbers the gains shown are more than likley correct. I did embelish the VQ30DE cams lift number at .395" because I could not find that info, but I think its close (what is the actual lift number??). I used VQ30DE cams in the VQ35DE motor because I will have to use them to do the swap. I also went crazy and put the VQ30DE heads on to a VQ35DE block and got a CR of 11.6:1, it shows gains but I wouldnt imagine it would run for long, it would more than likley blow out a head gasket even if the J&S saved it from detonation. So a SC'd VQ35DE w/VQ30DE cams will do the trick I think. We shall see

FWIW the JWT cam specs didnt gain much power, I just have the lift and duration info that Cattman put out, but I need the detailed specs of valve opening and closing degrees in order to get a real look at them and I doubt JWT will disclose those details.

Oh yea if you put VQ35DE heads on a VQ30DE block you get a CR of ~9.1:1, HELLO TURBO GUYS!!! Who's yo daddy! I'm not sure if the slightly larger VQ35DE valves will clear the VQ30DE cylinder bore, but I would think so...

The patient arrives on Friday wink wink nudge nudge!!!

 

Good Luck

 

 

Very intersting info! So in theory if I put VQ30 heads on my 2002 max I would have a 11:1 compreresson ratio? If this is the case what do you estimate the gains to be on my car?


Once my car is turboed I want to max the car out at around 8 PSI. Do you have any idea what my WHP and WTQ would be like that? I am currently making 230 HP and 230 TQ NA. I often wonder how much power could safley be run in a VQ35..

 

Give me a model turbo and a spec sheet and I'll plug it in for you.

~500 crank hp IIRC

 

I don't know where I would get a spec sheet I looked at turbonetics site but had no luck. The model of the turbo is T3/T04e hybrid turbo from turbonetics

 

Hey Matt plug these #s in for a VQ30DE intake cam. 0.394" valve lift, 248* duration, intake valve opens at 13*BTDC then closes at 55*ABDC. For the exhaust cam here are the specs 0.362" lift, 240* duration, exhaust valve opens at 57*BBDC and closes at 3*ATDC.

 

I need to know the...
Flow in CFM (island flow)
Efficincy %
Pressure ratio (at island flow point)
Surge flow in CFM

Call up Turbonetics and ask them, they better know this stuff. muuhahahah

 

Here are some garret compressor maps http://64.225.76.178/catalog/compmaps/fig13.html.

 

Yea Im a newbie, but why would you want to put 3.0 head on a 3.5? Is the 3.5 head crap? Now when we head we talking the whole top of the engine including the intake manifold as well?

Sorry for being stupid.... Im a bit buzzed at the moment.

 

I'm not afraid to say it... Matt, your my idol!

 

Other way around... 3.5 heads onto a 3.0 block...
Larger chamber volume to reduce compression ratio (more boost friendly)

 

That's nuts.

Good luck with the project.

 

Can you put varible timing cammed 3.5 heads on a non-varible timing cammed 3.0? Be very careful about how the oil/water gallies line up. And be carefull about the front cover areas.

 

Sorry those dont have the info I need, Ethan please call Turbonetics and get the if you want me to run them.

 

1) Higher compression makes more power.
2) I dont know, it should be just about the same except for the combustion chamber cc's
3) Yes in my conversion I will use the 3.5L block, 3.5L heads and VQ35DE cams, intake etc. I will not be using the variable cam control.

 

Good points about the fluid passages. The front covers should swap over from what Ive seen. I am just going to keep the 3.5L heads on the 3.5L block not using the variable cam timing control. I will use the VQ30DE cams because the VQ35 cam profile is made for the variable control and will not work well with out it.

 

Crazy. This would be very intresting to see. Any idea how you would launch something like this without crazy amounts of TQ steer? I mean would you be able to launch it hard?

SuDZ

 

But what Im still trying to figure out is how you going to get the 3.5 in to your 4th gen? Does it fit right up? or is there going to be major frame modification and other things done to get the supercharger on there as well.

Dixit

 

Slicks and clutch modulation

 

Yes! It will fit, I will have to swap somw external engine parts, motor mounts, intake manifold, exhaust manifold, timing chain cover, etc..., from a VQ30DE to the VQ35DE, but it will fit.

 

More power to ya.

SuDZ

 

Only you matt, only you. And will the s/c still clear the left side of the engine? I know that is the main reason stillen did not want to do the s/c on the 3.5 cause it wouldnt clear.

 

Read one of my oterh posts, I'm not using the variable cam timing.

 

How long until you undergo some of this adventure?

SuDZ

 

Well I have to see how far I really want to go with it. I can go all the way, pistons, rods, cams, head work, etc... but thats allot of money and time and a severe sacrifice in reliability. My big fear here is if I break it down that it will leak or somthing after I put it all back together. If I keep it all together and dont get too serious about the internals I think I will retain more reliability. Their is little doubt in my mind that the stock motor assembly can handle the 430hp and 405ftlbs that DTD2K predicts, in fact I think DTD2k is a bit on the conservative side. If I keep the motor basically stock it should be in their in under 6 months, if I get crazy maybe a year.

 

I dont know how on earth you do not blow transmissions. To the others: I've ridden in matts car and I dont know how he doesnt blow the transmissions. I cant imagine whats gonna happen here. Perhaps its 6 speed tranny conversion time?

 

I dont power shift. I shift like a granny. I have enough power the hard shifting is not necessary. Quick jolts to the power train is what breaks parts. Smooth power applictaion is MUCH easier on parts.

 

Speaking of the tranny and the six speed. If you swap the engines will the 2k2 tranny bolt up easier or is there still other issues regarding it?

SuDZ

 

i don't know what any of this stuff means but it sure is cool, good luck

 

Now this is nuts..

 

dont read forums into to much detail ...but havent seen it asked- would the altima's 3.5L 5sp tranny mount up any better in 4th gens than the new 6sp ?

 

Matt do you think you couldanswer this qustion Iasked earlier? I'm really intersted in this.

 

It works out to 11.62:1 static CR. According to http://www.bgsoflex.com/auto.html you'd get a 4% HP increase, resulting in 239hp. I used 10.0:1 as the static CR for your 3.5 is that correct or is it 10.5:1?

 

It is 10:3:1

 

FSM says 10.5:1

 

Heres the spec per nissan

Type VQ35 - V6 with aluminum block and heads
Valvetrain dohc 4-valve/cyl.
Displacement [cc] 3498
Bore & Stroke [mm] 95.5 x 81.4
Compression Ratio 10.3:1
Redline [rpm] 6600

It's definatly 10:3:1, I've read this every where.


Now do you think the heads from a 95 max would fit on my 2002? Any chance you will figure this out when your doing your motor?

 

Yup 10.3:1 I was wrong.

Umm they should fit but their will need to be some things checked, like oil and water passages, valve clearance. I might be able to tell you in a few months. For the oil and water pasages you could compare head gaskets. The valve clearance will take some mechanicing to find out.

M

 

I got my an early x-mas present today!

(plastic valve covers, yuck)

 

20 hours after your post...

Are you done yet?