Stock Block VHR limit.
 

For all my F.I. folks, I plan on getting my 370z boosted this summer. I've been seeing a lot of videos on YouTube in which some 370z's are touching between 600-700whp on the stock block. My main concern is how reliable my block will be running the numbers I have planned short-term before building the motor down the road. My mods for this build are as follows:

BP Turbo kit (COMP 6467 Turbo)
CJM S1.SE Fuel Return System
IDX 1300CC injectors
AEM 340 lph Fuel Pump
Tomei Catback Exhaust
Zspeed Stage 3 clutch w/ lightweight flywheel

I intend to run 10.5 psi off wastegate spring and E85. My goal is to be in the 500-550whp and 450-520tq. range. I'm sure this will be easily obtainable with the help of my tuner. I feel this is a conservative power goal. The kicker is my engine is at 138k miles (mainly highway) and will slightly increase as I recently just bought a new daily. I have not done a compression test, although, I do feel the motor is still fairly healthy. I need opinions and feedback on if my motor will be fairly reliable for the time being until I do an engine rebuild down the road. Any feedback is welcomed, negative or positive. Thanks!

With that many miles it is hard to say how long it will last. You need to do a compression test to see how it is doing. I can just about guarantee the galley gaskets may be done. Hard to say since it is a 2014.

You will be fine. Just don’t be a dummy

I read somewhere an unofficial claim that said they are pretty much maxed out at 700whp and 600wtq. They don't last long with that much power. It is safe to assume if you stay around 500 whp and 450tq it should last a good decent amount of time.

Now if I had the money and intended to go forced induction, I would do supporting mods first such as exhaust, clutch & flywheel, big oil cooler, motor & transmission mounts, differential brace, differential bushing and a tuning license.

Then I would have the motor built from the ground up or at very least pistons and connecting rods. Get the injectors and fuel pump along with aftermarket fuel pump hat.

Then I would get the turbo kit and the remaining needed parts.

Proceeding in this order will insure you to do it only once.

Some basic maintenance (like oil galley gaskets) would be a wise investment

For a 2014, the gallery gasket is most certainly the fixed version and doesn't need changing but it wouldn't hurt to check it while the motor is out.

As for reliable power, the GTR limit for stock rods is 600 ft/lbs. Anything over and its guaranteed to not last long.

As for the 370Z, the rods have about a 20% decrease in width compared to the GTR so I wouldn't expect the stock rods to last a reasonable timeframe above 500 WTQ.

I would definitely do a filter cut and a compression test before doing anything though. The worst thing is having the motor go out right after you install everything.

:iagree:
Definitely compression/leak down test & correct supporting mods :tiphat:
Unsure if that single 340 will fuel those 1300’s :ugh2:

Sharpen up your pencil & make a thorough list before you begin, and try to eliminate weak spots.

Recently had a discussion with a friend about this & boosting a stock block, staying 10/12# max....they wil hold for a while :tup:

Have a reliable tuner; as they’re tune will contribute the most to the longevity....+ you purchasing consistent fuel :tiphat:

I think i'm going to do that for a piece of mind. I have had the car for over 5 years, put over 120k miles on it since owning it, and haven't had a single issue with the motor/trans. Still on original oem clutch/flywheel. Kept up on maintenance regularly. Obviously, F.I. can deff cause inevitable problems, which I know it will it in some sort of fashion. Just hope it'll last long enough for me to have fun in it till I do an engine rebuild.

As jchammond pointed out, why are you trying to feed those 1300cc injectors with a single 340. I run twin pumps with my 1300cc's

That is what the shop I'm taking my car to told me to get. Still kind of a novice on proper fueling needs for the right injector sizing. As I get closer to slapping the kit on, I will reach out to the shop again to ensure if the 340 can support the 1300cc's. Worse case is I just cough up more money and get the cjm twin pump and another 340.

Or possibly just go with a single walbro 525 hellcat. That would save some money.

What shop are you using? It makes a big difference on your outcome.

:iagree:
Can definitely make or break your engine for sure :eek:

I live in Maryland. There is a reputable shop outside of Baltimore called Hills Garage. They specialize in Nissan/Infiniti's.

I would suggest MA-Motorsports in Glen Arm. They have done all my work.

I'll reach out to them and see what they are about. What is done to your Z if you don't mind me asking?

Set aside a couple of weeks to read it all and watch the videos.

http://www.the370z.com/forced-induct...ports-228.html

1)Listen to Spooler....he's done more for FI on this platform than most others on this forum, or any other that I am aware of.
a)Read his build thread and learn, learn, learn!!!
2)Cut once, cry once, go to MA and spend the extra money on a proper pump to support those 1300's.
3)Hoon until you rebuild.

Thanks buddy.

I just dropped Jon a text to let him know you would be contacting him. Another Derrick for his long list of Derek, Derrick, and Derick customers. LOL, They have a lot.

I just do me. I don't know any other way. Some folks like it, some folks don't. I posted it to help folks learn and save themselves the heartache.

I'm Derrick. Meet my brother Derrick, and my other brother Derrick.

Funny story, When Dalen move back home and Jon took over. He had to figure out which Derrick I was. They have 3 customers with them name Derrick.

:rofl2::rofl2::rofl2:

Brother, you'll be well taken care of at Hill's frank knows his stuff!! Ask to see Zach's car build...Solid deck block, crazy fuel system, boosted performance 68/71 lots of goodies to get some ideas,

;)

Or mamotorsports who builds race cars and specializes in nissans

Everything you have listed except for the fuel pump and the Exhaust is almost exactly just like my build except I have FI Exhaust and a twin pump CJM Assembly and a new 2020Z mine made 565@11psi Tuned @Dynosty Daily Driver for me pump gas only for now.

How was your experience @ Dynosty? I'm considering having them tune my TopGunZ Rotrex kit once I get it installed. I'm stock block, 93 octane. Similar to your build, other than the boost source.

Dynosty is good.

Thanks Spooler. I know you've had a good bit of work done @ MA. I'm in Pittsburgh & MA is actually a bit closer to me. I'm trying to decide between those two, and possibly also R/T Tuning in Philly.

For tuning, go to RT Tuning. He tuned my car twice and did a good job both times.

Thanks

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You can't go wrong getting an install and tune from Dynosty. They do hold the 1/4mile record with the kit your using and they installed and tuned it there. Hal knows his stuff across several platforms and one only heard and seen great things from him and his team there.

I had my TopgunZ kit installed and tuned by Vince at RT Tuning which produced 543whp and 426tq. RT Tuning also did my clutch upgrade, fuel return system and custom gauges in the original pods. I will be upgrading to the new Rotrex kit, installing an oil cooler and RT Tuning will be doing the installs and tune again.

Nice. Was that on 93 octane?

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All on 93

SOHO stage 2.5 kit, installed and tuned @ Z1 Motorsports

The 704 is on E70, the others are pump 93

I've put about 6k miles on the car, mostly on setting 2(6XX), and it's been great thus far.

It's seen plenty of abuse across all different settings giving friends rides and the occasional highway shenanigans, but I don't just beat on it all the time.

I also keep a can or 2 of Boostane in the car and use 1/4-1/3 of a bottle per fill up on pump gas.

1016whp but it blew up after an night of hooning.

You're supposed to cook that stuff in your garden, not smoke it. LMAO!!!

Who's car are you talking about?

Unique Motorsports. It ran lol