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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.
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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
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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. |
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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.
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What shop are you using? It makes a big difference on your outcome.
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Can definitely make or break your engine for sure :eek: |
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