Question for those who know our engines. I know that our engines will fail eventually when under boost. My question is, what do you suggest should be changed in our block for reliability while under boost. Obvisously the compression needs to be lowered but what else would apply. I just want to see about 400hp for now. I drive long distances, so not really being used for a drag car. I just want to have fun every so often.

 

My car is ok with 373whp

 

Are you running on stock internals? Your supercharged right?

 

https://my350z.com/forum/forced-indu...for-noobs.html

It's all on the first page.

 

just started reading that. Thanks.

 

Yes stock block. many members running SC/ST/TT with stock block. You will be fine going FI with stock block if you looking for under 400 numbers...just find a good tuner and try search you will read lot of good info in this forum...

Good luck

 

This was right in the first page when i opened that link up:
The VQ35DE motors as already been proven to be a pretty stout motor. A Stock motors with any type of forced induction is usually good to around 400-420whp, before you run into longevity issues. The week link in the VQ35DE motors is the stock connecting rods. I have seen people bend them trying to make over 420+whp for an extended period of time. Now granted, there are people that have made more power with the stock rods, but as I said.... you start running into the "How long is it going to last" questions.

The stock crank and stock sleeves have already been proven to handle 900+hp. Again, longevity and reliability are the two main points here. There is one company making 700+whp on the stock sleeves and stock crank for a very longtime now and the motor is still holding strong. Some people prefer to "Sleeve" there blocks. This is an added precaution to make sure the block last longer. Sleeves will allow you to run higher boost, and make more power reliably. If you choose to sleeve your block, do you homework and make sure you have a experienced machine shop do the work.

The stock VQ heads and cams are a thing of beauty. They flow great, and people still use them, un-altered, and are making over 700whp. There are companies out there that make a great alternative for cams. Brian Crower, JWT, Tomei, HKS just to name a few. Cams in the area of a 264 degree cam are what most people will upgrade to. Companies do make 272's, 268's, and even 280's, but the higher lobe duration you get, you will get a rougher idle.

My question is, why do some people on here blow their engines if they are running under 400hp? I have read of people not barely under boost, blowing thier motor on a hot day. Have these people pushed their cars daily or drive it with the pedal to the floor or over boosted or what?

 

you are on the border line. if you have the money to do a mild build for reliability then go for it. low compression pistons, forged rods, new bearings, hg, stock heads etc... if thats not the case then expect solid 380whp with stock internals, turbo kit or supercharger and a good tune.

 

It can be many things.

- motor wasn't healthy condition when they installed the kit
- bad tune
- hard drive
- no maint

etc etc etc

 

There are no absolutes. There is no 100% safe power level. If you consider that metal fatigue is cumulative, the power level you run will be inversely proportional to the mean time to failure. That's it - simple, because nothing lasts forever. Of course there will always be outliers to the mean and some rods will bend sooner or later than others.

The question you have to ask yourself is: do you feel lucky?



(lol - sorry couldn't resist - )

 

nice

I'll have to find a conservative tuner then where i am located. I would be happy with the 350 range..

 

 

I couldnt resist Raj as i have been boosted for oner 55,000 miles and am still standing tall.And at that statement i probably have used up my last lucky straw.

 

LOL. How does it feel to be an outlier? At least you are on the right side of the curve! That "punk" in the movie got lucky too, lol!

 

I dont know yet.Maybe i got lucky and got one of those freak motors..................yea right.

 

Glad you read my thread!