maxam

hi guys .

I have a friend asking me about NA bult for his VQ30de .

he have :
VQ30DE ( reboored )
polishd heads
rev up oil pump
MEVI( polished )
VQ30DEK cams
nitros 50-100 shot
he want to upgrede heads gasket . he may go to VQ35HR head gaskets for better colling as he seyd .

so what do you suggest ?

MoncefA33

iTrader: (6)

The DEK cams are weak, get something aftermarket. Use the 00VI instead of the MEVI.

KRRZ350

iTrader: (29)

I used them on a de-k no problem, but I spent alot of time in the FSM's coolant diagrams confirming, all I had to do was the typical enlargement's on the block (Pics/info on JWT's website) & modify the de-k's secondary thermostat, so I don't see why it wouldn't work on a 95-99 3.0 with even less work.

Before someone chimes in about the bore size difference, it's very slight & won't cause any problems

FYI, if you go that route, or if anyone else is interested- I have brand new unopened Nissan HR headgaskets & headbolts, $80 shipped, PP is Maximaparts@hotmail.com

KRRZ350

iTrader: (29)

Oh and yeah, gotta agree, those de-k cams are insignificantly worse than the 4th gen ones, get rid of them, get some 3.5 or rev-up cams. I've got regular 3.5 cams you have them for $10 additional if you end up buying the HR head stuff, just to cover shipping really. You will need some spacers to make the 3.5 cams work though, I would recommend aftermarket ones though honestly, or at the least rev-up cams.

NmexMAX

iTrader: (22)

I'm curious as to the approach of the "polished heads" he took as well as the whole "rebored" deal.

How far is he revving? Any reason why he's got an HR oil pump?

Seems like a mechanical build, all hardware, no software. Any plans for ECU modifications/tuning? (overused word)

maxam

he seyd that he mey go for stage 1 turbo (with out intercooler) so he will keep it .

I dont know, I will see what jim wolf say than we will decide if its ok or not.
actully he is searching for thicker OEM head gaskets he dont want to order any thing .

Ahaa, than we will use stock DE cams

he is going to 7500 RPM as he sayed .
yes sure he does . E manage ultimate .

Quickywd01

iTrader: (16)

The DE-K intake manifold is still more "powerful" than the mevi throughout the rev band so it's worth the effort. Might as well let those cams work. And it's rare where you live. That outweighs the polishing done on the mevi.

Crusher103

iTrader: (10)

Wait, HR headgaskets on a 3.0? Will that work?

If you are boring out a 3.0 to the displacement of a 3.5, just get a 3.5. and with the amount of money being dumped into it, you gotta do something better than stock cams.

maxam

ahaa . OK frist we try mevi with dyno then 00vi . we will see wich is better.

maxam

we will do as jim wolf did .

he will not boring to git 3.5 pistons . but for bigger size 3.0. I think 0.050"

maxam

I have read jim wolf's file about the head gasket .

it's all about compareing HR head gaskets with DE's head gasket . then I got a pic of my old cometic head gasket and put it in front of me to compare it with the other . also a pic of the heads surface and 3.0 block surface .

this is 3.5 DE from jim wolf file



my old cometic head gasket from my old engine



and vq 35 HR from jim wolf file



as you can see 3.0 de mostly same as 3.5 DE . if 3.5 DE gaskets can be used on 3.0 as MY new engine so why we cannot use the HR on 3.0 with jim wolf's modification ?


but !! what is the purpose of the 0.1mm thick fire ring in the HR ? why is it at the top of the sleevs only ? I think this will make it unbalance for the heads

maxam

ohh I just forgot one thing . he will use ARP head bolts .

and A new question from my friend . is it ok to use double head gaskets ?

I think that is stupid question but it is good to avoid wrong thinking .

DrunkieTheBear

iTrader: (17)

Revving to 7500 RPM ain't gonna happen, his power will drop off severally after 7,000 RPMs IIRC and espically with a MEVI, since it doesn't have the legs the 00VI has. Pick up some Rev-up Cams for cheap, if your in there it will be worth it in the end.

NMex is right too, what do you plan to run this engine with, all hardware and no software will make him a dull boy.

And an Intercooler is only about $50-100 on ebay, running a turbo without an intercooler is like having sex with a fat chick, sure you could do it, but she ends up overheating on you.

DrunkieTheBear

iTrader: (17)

You didn't Kevin's post did you.... go back and read his 1st post

maxam

OK than +1 for ooVI

and +1 for intercooler. he likes fat chicks lool

but still head gasket questions not answerd yet .

DrunkieTheBear

iTrader: (17)

you still need Rev-up Cams IMO.

KRRZ350

iTrader: (29)

I'd be way to bugged out about trying to use two headgkets, might work but still, I wouldn't want to test that one. Lower your CR other ways, Cometic should have some thicker gaskets out for the HR by now.

ARP studs for the heads on a VQ (And most jap cars) are a complete waste of money, unless you a: want to be able to tear your motor down without buying new nissan headbolts every time, or b: get the L19's, It goes like this: ARP L19's > stock > ARP regular

t6378tp

iTrader: (69)

A intercooler is not required on low boost setup the turbo just does not generate that kinda heat. Now if he is planning to run above 5psi then yes I would get a intercooler or meth. But if you add the cost of the intercooler, piping and couplers then the psi drop that comes with it and the amount of time it takes to remove and cut your bumper it's just not worth it. If anything he can just run meth like the supercharger guys.

maxam

Ok guys he will not go for more than 5 PSI . he dont want to waste his money on piping and cutting as t6378tp sayed .

he got VQ3.5DE cams from a dead engine in the junk yards . I think that is good .

and he dont want to wast one month waiting for cometic gaskets to arrive . he dont have a spare car spare car loool .

but still head gasket questions not answerd yet !!!

what is the purpose of the 0.1mm thick fire ring in the HR ? why is it at the top of the sleevs only ?

I think this will make it unbalance for the heads .

i might go to Z350's forums to get the answers

doublea

iTrader: (7)

I just PM you. I have a bunch of brand new parts I can sell you for reasonable price, ie: Arias forged piston, crank bearing set etc.

Crusher103

iTrader: (10)

I have some bad post around here but seriously, you need to proofread before you click reply.

maxam

sorry

http://forums.maxima.org/all-motor/6...ially-jwt.html