If you put a TT Kit on a Z do you have to rebuild the block even if its a low 7psi boost?

 

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

https://my350z.com/forum/forced-indu...ust-watch.html

 

nope

 

yes

 

maybe

 

however it depends not only on the psi, but also on the actual hp provided by your setup. for example, i've seen 5-6 psi ST or TT give you ~400 HP easily, and 8-9 PSI superchargers struggling to get 400 hp.. both systems are relatively safe on stock block at that hp, but for a 8-9 psi ST or TT setup, you can get enough hp to blow up your stock engine easily (so i've heard).

above is only based on what i've read from other threads and in no way a personal experience. i'm sure the guys w/ fi setup will chime in.

 

A huge part is also the tune.

 

I would say that it depends on what motor (DE, DE revup or HR) and what HP you are shooting for. Each one of those motors is rated for a different max stock HP. How much money you are able spend will also dictate your build and therefore you HP. There will be a lot of outside considerations that you should factor in. You should research all of this before you make your own decision.

 

people blow motors built and not built at all sorts of PSI... 5psi-XXpsi in a 350z, there never seems to be a safe route xD maybe HR but dont know much about those. just ask around getting a motor built is never a guarantee you will have a bulletproof setup.

 

Many of us have run turbo kits on stock blocks with great results, on the other hand several guys have blown stock motors at low boost. Alot depends on the tune, i would certainly give it a shot if I was you.

 

HP does not kill motors as much as torque. This is why you don't see nearly as many blown SC motors as you see T or TT.

A turbo kit can make 400ft/tq at the wheels at 3800rpm. Now if you are not smart, and "punch it" in any gear at 2500rpm all the time, the motor will blow. This will create a tremendous amount of stress on the internals, rods more than anything else. The higher the starting gear the harder it is on the motor. So it is not only the power, it is how you use it.

 

you learn something new everyday! Never thought about it like that...

 

You don't have to build the motor per say, but like mentioned before it will depend on your hp goals and setup. I've been running a 18g TT setup on stock block for 2 years at 8lbs at 430whp... My stock block owes me nothing with just over 15k miles... I'm swapping now for my built block for no other reason then i'm hungry for more power.

As mentioned above, alot has to do with the tune... I would HIGHLY suggest you research tuners, both on here and then on google (google can hold records through other portal sites that forums cannot alter or archive)... alot of information gets hidden on forums over time and can be decieving if you are looking to get into boost (I learned the hard way)

So you do not need to rebuild your motor if your going with a conservative tune, take care of your car, and know when and when not to boost your car... That's my feeling, and I would read through the FI for noobs posted above. If your staying below 400whp, I would keep the stock block. Just my 2 cents.

 

BTW what color did you go with?

https://my350z.com/forum/exterior-an...-of-paint.html

 

This is why I come here and read.

 

Interesting. So, more stress is placed on the engine at 6th gear, wot, at 3k rpm then, lets say.. 6k 3rd gear at wot? If this is true, then a/f ratio at 2.5k should be 10s-11s even at low boost? i thought.. since engine is running at low rpms, the engine was under less stress.

 

Stock block + 400whp=

 

^ Not so fast. Here is some data on FI with stock block.

https://my350z.com/forum/forced-indu...solidated.html