Well, after a few months of enjoyment and about 5,000 boosted miles, I perforated by passenger side block wall today. Street driving habits are mild, track not so much. But this happened on the street. Had been boosting around 10psi but only hit 8.5psi when it let go. I had ran it up in 1st a little and then hit it in second when it made a loud noise and started knocking heavily. Drove it/coasted about 100 yds to get off the road way and shut it down. I wish I had shut it down immediately and then dealt with getting it out of the road later. Nothing out of the ordinary, all readings were normal when I was driving. Oil pressure, water temp, etc.

My local shop got it on the rack and verified I have a window in my block. Nothing outside the motor hanging or damaged (that they can see on prelim investigation) hanging under the car. Not sure what I am going to do at this point. Four options:

1. Built VQ35HR
2. Stock Engine VQ35HR
3. LS Swap (local shop specialty)
4. Part Out

With the questioned reliability of HR builds I am scared as heck to try this route. The last thing I need is another busted block.

I'm a little surprised that this happened but would certainly like to gather your input on what to look at as we take it apart. Questions, opinions, reasonable comments accepted. Original Build Thread Found Here.

Basic Summary:
07 VQ35HR Stock Block
GTM Stage 2 Tuner Kit
GTM 3" Down pipes
GTM 3" Exhaust
Support Fuel, Uprev, Etc.
OS Giken Twin Disk Clutch
34 Row Oil Cooler
Bummed out for sure.....

 

Go Ls

 

Was Get That Money aka GTM involved any where in your build. I mean did they even supply a bolt or even some permatex in your build. If that is the case and GTM was involved then hmmmmmm....... yeah have a nice day sire.

I recommend built block and call it a day. I would recommend Dynosty and see what they offer.

https://my350z.com/forum/engine/5107...ur-engine.html

http://www.dynosty.com/products-services/

 

I spun a bearing in my built motor there are no offerings for aftermarket bearing for the hr. Unless u go with gtm ones that are crazy expensive. Although I believe my issue was with oil not the build itself as the oil was extremely thin days after it had been parked

 

My stock block popped in the exact same fashion. I lasted 3000 miles on stock block. 9000 on built.

Chances are if your habits forced the car to blow that soon, you will join the club of Shame even built. Don't make the mistake many of us have. Don't build this car.

 

Not sure where you are going with the insults to the provider of the kit, it worked well and made great power.

I will certainly consider my original shop as well as Mr Hal @ Dynosty to supply the built bottom end if that is the route I take. Just scares the crap out of me to spend a bunch of money on a built bottom end and run the risk of doing it again....exactly what Alberto and others have alluded to. I don't need a 50-60k Z car. I would rather just cut the losses, recoup what I can and be done.

 

Single turbo 2JZ swap.

 

I think what Alberto is eluding to is get out while you can. FI and pushing the limit with 350z's can be considered one hell of rollercoaster ride that may cause depression and alcoholism. Sorry for your misfortunes and I hope you figure everything out.

 

Get out while you can

 

I'd get another stock block and detune it a bit or at least have another tuner go over it -- you could have had detonation over a long period and not known it, or just a bad block in general. Oil cooler couldn't hurt either. A local guy has been running around 12psi on a VHR GTM twins hard driven for a couple years now. 30k boosted mi on my stock DE lots of track time and hard driving no issues yet. It's going to be a gamble any way you look at it tho... even N/A engines can pop.

 

Sorry to hear mine popped after 4 days mine was a de. Also had one of the best tuners.. I'm selling the turbo kit and keeping the car n/a. Built motor is gonna cost you a ton! You could do a ls swap for around 10k if you do it yourself but looking at a lot of down time. All the small stuff adds up! But sorry to hear about the engine it sucks!

 

I would follow this, building these blocks is still unknown territory and a gamble. The safest thing to do is just to install an oem bottom block and retune. Building the block, from what ive read, is difficult because the clearancing is far from a science.

 

Reading these horror posts,they sure may scare the hell out of guys wanting to go the
FI route.On a positive,it may be a reminder that if you decide to boost your engine
you better spend the bucks on a proper build.I'd suggest to "over build".
Seems as though everyone at one time has learned their lesson the hard and expensive
way when things blow up.Been thinking lately about going FI.Stuff like this
sort of changes your mind.

 

Man. That sucks. Lots of good opinions here. I thought HR was pretty sound but I know anything can pop. Gl w whichever route. Makes me want to lower the boost a tad.

 

when i go fi im keeping it modest. built bottom end, low boost, stock rpm limit.

 

That's easy to say ... Once you get a taste you will want more.

 

LOL, this^^ thoughts of upgraded turbos and built bottom end are getting very distracting lately.

 

easy to say-"when I boost mine" also. or "Im saving up for FI"

 

I'm just buying a 2010 GT-R to take care of my boost bug.

 

well not everyone has horror stories...i had 20k miles on my boosted stock block DE..saw alot of track time and drove it pretty hard..420whp on a dynojet 355 ft. lbs...i think its just luck of the draw...good luck with what you choose to do. who tuned the car or were you just running a generic tune that comes with the kit?