maxam

do any of you had any idea about this ???

darton sleeves .




http://www.ebay.com/itm/Darton-Nissa...1ce3b1&vxp=mtr





have any of installed it on your VQ ?

I think this is the thing that will make our VQ can take more boost .

ranmas2004

iTrader: (2)

Dont need to do that....you trying to make 600whp on a FWD car??? Thats a waste....if you want just get aftermarket rods and pistons....you can take it up safely like that. If you have the 3.0 engine the internals are alot stronger than the 3.5 engine. How much power you trying to make? You know how much installing sleeves going to be? Take entire engine apart, machine engine, install, all the labor....to NOT be able to put 600whp down. Its up to you......just get rods and pistons if you want to go extreme.....

streetzlegend

iTrader: (8)

Id say about 50% of aftermarket sleeved VQ's fail, not because of the sleeves but because of the installer/builder (i hear alot of sunken sleeves).

Get yourself Rods and Pistons, strong head bolts, and you got yourself a 700hp capable engine. Our cylinders are pretty darn strong. To me, aint nothing wrong with 600hp on a FWD, i see feather weight civics with 600hp+ doing 9s, 8's at the track. Now if ur talking about street 600hp, then yeah thats just crazy (but id still do it, **** i got a built 3.5 and everyday i wanna push it more).

maxam

Im asking about this because last month my mechanic have finished rebuilding a 3.0 (cp pistons , comtic gasket , ARP bolts for heads and crank ) . he raised the boost to 17 PSI and got 400 hp but after many runs he got blown head gaskets .

now he is thinking about getting the sleeves to avoid that problem .
so what do you think ?

aic96max

iTrader: (12)

if he blew cometic gaskets, hes got major tuning/other issues.. guys should be able to make 400 on a stock engine. sleeves must be put in by a pro.. and a good one, if your looking for over 600-650 iirc

datdude20

iTrader: (17)

thats simply because they have better aftermarket support and all kinds of tricks to help them put the power to the ground. maximas dont.

ranmas2004

iTrader: (2)

Yeah...Im making 404whp on my engine at 8psi and no problems at all. Sounds like a garbage tune to me or maybe engine had problems before you put FI on and then FI just magnified the problem. Dont need sleeves for 400whp.

Flava_24/7

iTrader: (46)

Yup, with Cometic HG and the ARP head bolts he shouldnt have blown the HG.


To the OP, was the 400whp @ 17psi on TC or SCer? if Turbo, seems a bit low on the power for those boost levels. I put down 400whp with my SCer at less boost.

ranmas2004

iTrader: (2)

This is what I was thinking.....I believe there are 400whp SCed 3.0s at 13psi or something like that......17psi should have been like near 450-480whp......sounds like engine wasn't put together right....

maxam

it is TC . they bought a used motor and they rebuild it . but the mechanic sayed the radiator is not good at all . it is not original .

but I rule out any rebuilding issues because he is building 1000+whp motors and VQ is easy for hem .

Flava_24/7

iTrader: (46)

Well somethings definitely wrong. 17psi from a TC is quite a bit of boost.
If indeed the radiator isnt cooling correctly they should have seen the temp gauge getting hot well before it blew the HG. Of course if they ignored the gauge and continued to push it then sleeving the block wouldnt help.

Quickywd01

iTrader: (16)

You might have a good mechanic but a horrible tuner.

streetzlegend

iTrader: (8)

OP, They most likely used the standard ARP which I dont think are much of an upgrade compared to stock head bolts. You put HR bolts or L19s on a VQ and you got a whole lot of motor to use. Willing to bet the motor blew head gasket because of the tune or poor cooling or both. A VQ30 can handle a lot of power if you know how to tune and have strong head bolts.

Supporting mods? Stiff suspesions, torque link/strap for the motor, big slicks, 2step/nitrous for launch, subframe connectors, etc... I dont see what more supporting mods we need.

Nealoc187

iTrader: (23)

i think you need to throw more knowledge or tuning ability at the car if you are blowing up a built motor and only making 400whp @ 17psi, not more parts. Certainly not sleeves. Sleeved motors have pretty poor reliability compared to non sleeved based on my research, and they certainly aren't going to prevent blown head gaskets.

Any decent tuner should be able to make 400whp on a 3.0 on like 12psi. I question what was going on with your previous setup/tune.

you shouldn't even think about sleeving a VQ until you are looking at making numbers in the 700whp range.

Quickywd01

iTrader: (16)

Someone should tell him to post AFR's and such.

maxam

of course my friend it is 11.2 .

is it normal to have 450hp with boost of 18psi ? is that standard or it depends on the turbo it self ?

in this case we have a turbo T4 from garrett wich is very cheap and good .

t6378tp

iTrader: (69)

I wouldn't say 450 at 18psi is normal, it depends on so many things. Just cause the motor is built doesn't mean it's going to make like a 100 more hp than a stock motor at the same boost level. In fact if your running 8.8-1 cr vs stock you would make less. Now what should change is that you should be able to run 20-25 maybe even 30psi were as the stock motor can't, which in turn would allow you to make much more power than a stock motor. Althou like everyone said a sleeved block is not going to fix your hg issue.

imho 400hp at 17psi sounds like less than stock cr with like 14-16 degree's on timing

maxam

Of course my friend . CP pistons CR is 90 psi in each piston . They retard the timing 6 dgrees by AEM FIC with 95 octane fuel . But I still dont know how is HG gone easily like that .
Is there a special torque for Comtic HGs or using the standerd torque is fine ? Or should we upgrade the cooling system ? ( radiator , fans , oil cooler ....)

maxam

This set up is not mine at all . This set up was done by the mechanic who made my set up before 2 years . My car is still working fine but my mechanic just finished this new set up and got a blowen HGs . He thinks that the sleeves can solve the problem ..


And if Im taking about my self, I would learn from the others mistakes to prevent breaking my engine . If the sleeves are useful I may go for it in the future plan.

Nealoc187

iTrader: (23)

regardless of if you designed and planned and executed it or your mechanic did, from your description it was done poorly. sticking with the same mechanic and having him do an even more expensive and complicated setup when he can't even get a basic setup to work and run correctly and make the power/have the reliability it should is a bad idea in my opinion.

it sounds like your mechanic does not know what he is doing.

maxam

He have done 1000+ whp on GTR34 . And 700+whp on Z31
. He is very good with VGTT and RB engines . But when he coms to the VQ I dont know why he fails.
two months ago he built GTR35 engine and got 700+hp. And I still dont know why VQ fails with hem .

Quickywd01

iTrader: (16)

This makes no sense.

maxam

Anyway , In this case if the sleeves are waste of money , what should we do to prevent the same problem?

Quickywd01

iTrader: (16)

We don't know what to tell you because people on here are making more power on stock motors with no problems. Maybe you have a cooling problem? I'm out of ideas. You keep saying you have a perfect mechanic but why can't they figure out a problem like this? Show this to your mechanic: http://www.dynomagic.com/thefast_hlh.htm
http://forums.maxima.org/supercharge...o-results.html
If you want us to SAVE you from killing the car start posting every single detail of your setup. Pics wouldn't hurt either. Sounds like your tune is not right. Help us help you.

streetzlegend

iTrader: (8)

Or also, more detail on what caused the engine to hurt the head gasket. Too much timing is the most common issue on vq's I think.

Quickywd01

iTrader: (16)

maxam

Timing was retarded 8 degrees. Should we retad it more ?

There were two things were not good at all in the car .
1- the radiator was not original from nissan . It locks like it but it is not .

2- fans speed . They were connected directly on speed 1 all the time .

The car was good untel they rised the boost more than 10 psi. The engine became hotter run after run . When they rich 17 psi the temperature gauge was reading more than 220F . And the owner of the car kept it like that until he broke the engine . When they opened it they found the gaskets blown .

That is the full story . Got it from the mechanic .

Quickywd01

iTrader: (16)

Now I'm really confused. Are you the owner of the car?

ChrisMan287

iTrader: (34)

Something's not right here.

400whp at 17psi?

Quickywd01

iTrader: (16)

You shouldn't even drive the car let alone dyno it if it's overheating. And you should be smart enough to know how to set the fans up to cool the car. Common sense my butt.

maxam

I told you before . I'm not the owner of the car . this car was made by the same mechanic who made my car .

I just want to learn from others mistakes

maxam

we told the owner but he didn't listen .




low C/R pistons + small turbo = low power

Quickywd01

iTrader: (16)

Oh, what a waste of time.

maxam

Sorry my friend . That is what we call it trupleshoting . And find solutions .

Quickywd01

iTrader: (16)

Step 1. over heat the car
step 2. blow up the car
step 3. Why did car blow up?
step 4. because racecar wow I'm a genius. That's what we call stupidity.

People with superchargers and 8psi turbo are putting down 400hp at the wheels with stock everything in some cases.

I'm sorry but this is just sad, tell that other person/owner of the car to read a lot more at least on this forum. They are wasting their money and it could be used to make double the hp it did like others have stated. Well good luck.

After reading the thread again I felt bad so here are some pointers because what I was just going to leave up there isn't helpful.

You want a magic miracle to save that motor? http://forums.maxima.org/supercharge...explained.html

http://www.jandssafeguard.com/

Read...

Quickywd01

iTrader: (16)

I found the problem.

Nealoc187

iTrader: (23)

Maxam is not the owner? why did i think throughout this thread and all his other threads that he was the owner of the car?

I'm very confused.

t6378tp

iTrader: (69)

700hp on a built r35 is nothing to brag about imho

t6378tp

iTrader: (69)

maybe he pulled too much timing causing the egt's to shot up, I think pulling that timing on 10psi on a low cr motor is over kill

maxam

Some times . Not my all threads .
I have wrote allot about my car . But some times I ask about some thing for some one else just like this thread . I may get some thing new to learn and may others learn . So we are learning from eachother .