I am in the process of getting the gaskets I need for my 3.5L build up. I had my parts guy at Nissan check the part numbers for the 350z and Max head gaskets, they are different. So my guy orderd both for me so I could check them out. As it turns out they are both MLS gaskets but the 350z gasket is a 3 layer steel gasket and the Max is 2 layers. I had talked to a few knowledgeable folks about the MLS gaskets and they didnt like the Max 3.5L gasket because it was only two layers, as compared to a Supra MLS gaskets which is 3 or 4 layers. So if your going to build up a 3.5L get the 350z 3 layer gasket, it will hold!

 

MLS=multi-layer-sandwich?

Nice find Smardi!

 

sweet...



always the pioneer..

 

David Burnette comes through again.
























Yeah Matt you have come up in our conversations.......

 

Hmm, that's interesting. 255-287 apparently requires a stronger head gasket in their opinion. Wonder if they're anticipating higher power levels. Wonder what the 6th gen has?

 

your car is already sick I guess your working on getting AIDS now.

 

Multi Layer Steel, industy standard for modern engines now.

I actually went through a friend at Capitol Nissan in Maryland out side of DC. Local deals only, so if your in the metro DC area its a great hook up! cheeper than courtesy

 

Dumb question, but I have to ask it? will that gasket fit our VQ 3.0 engines or is it a totally different size?

 

Thank You, this will be useful in the near future!

 

is the gasket thicker?

 

Pretty sure it wont fit cause the bore is different so it wouldnt match up. Right?

 

3.5 gasket is different from the 3.0 gasket.

 

Always a pioneer, cant wait to see the results of the motor buildup

 

lord, I can't wait to see this beast.

 

Hook me up den....

 

Nice find.

 

I wonder what OTHER goodies the 350Z VQ has to offer.

What other internals have you found to be different then the Max VQ35? Pistons? Rods? Crank? Anything?

I know there are some aftermarket ones available for the 350Z, but these are probably cheaper.

I forget, which heads/cams are you going with, VQ30DE or VQ35DE?

 

VQ30 heads.

 

this is good news for my planned ATI procharger kit on my Z....

 

JoO baaastard!

 

I was thinking about that too.



If it is thicker, how much would it throw off the compression ratio, if any?

 

No both are .023"

 

Let me be the first to apoligize. 3 layer steel versus a 2 layer steel of course it would thicker regardless if it's 0.0000 or 0.00 difference. But I see with both of them 023 it's very minimal. My bad

 

Dont worry he cant go above 6psi (still low 13's ) unless he upgrades the injectors as well, and those are not out yet (not to my knowledge anyway) . Once they are out, they should also fit the 02-03 max's which means, well alot of things

 

are you sure man??

that ATI SC looks a bit... hokey.

 

I think it looks great but you can count on the production models not looking quite as good. I personally would wait for a few options to choose from.

 

ok, so 3.5 gaskets wont fit on 3.0 but since 300zx engines are made to take more damage, power and strain than maxima engines, do they come with better gaskets as well and would they fit on a stock maxima engine? both 3.0....good possibility ehh?

 

?

 

If you are refering to the 300zx/ VG30dett motor, I dont belive the VG and the VQ blocks are the same design. Good idea, wrong motor.

 

Not even close.

 

They can go above 6psi with a FMU. I don't believe they are using a fuel pressure riser, because the 350Z injectors flow more cc than our 3.0 injectors and ours are apparently good up to 10psi.

Or the GReddy E-manage and bigger injectors, which ARE out. I think they put down 430ish whp in one of my rice mags on a VQ35DETT.

 

i'm always wrong

 

Hmmm interesting. So what we now need to know is will the injectors from the 350 work with the 3.5 max I remember when dave dyno'd the alti 3.5 with the prototype hotshot headers the gains were near the 30whp mark and it was running lean. My predict that it should fo well over 30whp gain with a properly tuned fuel system which will obviously reqire better injectors. A FMU would also be needed to fine tune things so I guess the only person that knows if the injectors will work is DaveB, or im gonna give nissan a call and see if the injectors are of similar size, ect... Ill post back.

 

Crap, I just called and he said the part #'s were not even close to one another. Now I dont know what the exact difference is, Im hoping the body of the injector isnt the difference and itsonly the flow, ect... Like I said only person who can go into detail on this is DaveB.

 

The problem is that these cars(ATI 350Z and Altima w/HS headers) are running stock fuel pressure. You can't drop in way bigger injectors withOUT the ECU having a fit or idle problems. Mardigras successfully dropped in 370cc injectors in place of the VQ30 240cc injectors, but he had to use a FPR to lower down the fuel pressure to make it idle. Almost to the point that proper fuel atomization would cause issues. The mechanical bandaid of a FMU such as the Vortech or Cartech unit allows the fuel pressure to rise according to boost. This will allow you to increase the amount of fuel withOUT a modified ECU or stand-alone, however you risk the chance of an injector 'sticking' or going static.

I think SR20DEN has already determined the injectors are different, but I could be wrong.

I just DOUBT that the ATI 350Z was using a fuel pressure riser, because 6psi is nothing.

 

Well to be honest with you im not at all fimilair with the FMU setups so I dont know what is needed to correct this problem. So you are saying basically all is needed to correct the runnin lean problem is a FMU such as the Greddy Emanage or AFC-II? The sticking injector might emerge in the future which will cause a HUGE problem if your running boose. The last thing you want is your injector freaking out with 8-10psi runnin in the motor. Since you've been here longer and seem more mods come and go, edumacate me, (for all motor is all im consirned about here.) Is the AFC-II all that is needed? Or what else