how much psi can the stock motor hold?

[jflogerzi]

No one has enough data to prove one way or another. You gotta pay to play. With a proper tune and the right mods you can reduce your risk. But these engines have proven to pop even under NA. I have driven in a boosted twin(turbo and S/C) as a passenger and I can tell I was giddy like a school girl. Turbo is the best for DD driving.

[14BRZ]

Originally Posted by jflogerzi

No one has enough data to prove one way or another. You gotta pay to play. With a proper tune and the right mods you can reduce your risk. But these engines have proven to pop even under NA. I have driven in a boosted twin(turbo and S/C) as a passenger and I can tell I was giddy like a school girl. Turbo is the best for DD driving.

^ You're welcome

I'm at 10 psi on pump and theres no reason to go any higher than that on the 91 we have here. Ill be on e85 soon with a map for 12 psi and one for 14-16 depending on what my clutch can handle without slipping. For safety, its all about the tune and not going crazy high with boost levels

[sluflyer06]

0 if you want it to last any long term miles. These motors just aren't built for these power levels, build the motor and then boost.

I and most of my friends already went down the blown motor road in evos and stis in our 20s. We learned then the smart moves to make when it comes to power. Reports of people with 20k and less miles mean zilch for reliability. When people start hitting 60k boosted miles we will get a better picture, I doubt many will ever make it that far on a stock bottom end.

[Synack]

I know I'm not on stock motor but maybe this will help someone. 9:1 compression, forged pistons & rods. 20 psi, 350whp on journal bearing turbo, 93 octane.

Up next, BB turbo with 93 and E85. Aiming for 375whp and 450whp tunes.

[FirestormFRS]

Originally Posted by AVodka14

Purely curious. You really think the motor for our platform was built to handle boost? I know the DIT is the same motor for the most part. And that Tada wanted the purchaser to do what they pleased with the car. Just wasn't sure boost was part of his equation or not. Curious for more details from you. Thanks.

The engine was designed from the beginning to be both NA and Turbocharged. The engine was meant to be used across multiple platforms requiring different levels of power. The major difference between the 86 and other platforms using the FA20 family is fueling and compression ratio.

[xUhMeyziing]

well i guess my question remains unanswered haha. i guess ill just have to find out

[14BRZ]

Originally Posted by xUhMeyziing

well i guess my question remains unanswered haha. i guess ill just have to find out

Uhhh what? You've been told how much boost multiple people are running on the stock engine. This platform is still new and we don't know the "safe boost" levels of this motor yet for long term use.

You have also been told that you are out of your mind if you are thinking about running 20psi on the stock internals. Your questions were answered.

[xUhMeyziing]

Originally Posted by 14BRZ

Uhhh what? You've been told how much boost multiple people are running on the stock engine. This platform is still new and we don't know the "safe boost" levels of this motor yet for long term use.

You have also been told that you are out of your mind if you are thinking about running 20psi on the stock internals. Your questions were answered.

and there was other comments stating that plenty of people are boosting large numbers and have had no issues thus far. so its not really a for sure answered question. just very opinionated. thanks

[Celadrielas]

Originally Posted by jflogerzi

Its never gonna happen you can keep dreaming with those numbers and staying NA

on a fully built motor which is tuned, NA can easily hit ~ (or around) 250. I've seen one dynoed at that. But again, fully built motor and I never said "Reliably".

Besides, why the negative attitude? I mean, what the hell does it matter if I paint my car purple with orange polka dots? It's my car and this makes me free to pop, pay, or play with and for what ever I want. When you buy me a motor, I'll tune it how ever you see fit.

[MidnightRunner]

Originally Posted by Celadrielas

on a fully built motor which is tuned, NA can easily hit ~ (or around) 250. I've seen one dynoed at that. But again, fully built motor and I never said "Reliably".

Besides, why the negative attitude? I mean, what the hell does it matter if I paint my car purple with orange polka dots? It's my car and this makes me free to pop, pay, or play with and for what ever I want. When you buy me a motor, I'll tune it how ever you see fit.

I agree. Different strokes for different folks. Awesome na thread on here if you haven't seen it already:

http://www.ft86club.com/forums/showthread.php?p=1796150

Or if you wanted a more simple route to your goal, the innovate sc or speed by design turbo gets you there at really good prices. Just my two cents.

[350z]

Why not ask an actual tuner what would be safe? There are alot of comments that refer to what someone has seen on youtube. Rarely ever do you see any actual street FI data. For the dynos that show 5-600whp on a stock engine, sure the engine survived that 1 pull but how about make those pulls back to back and get some 1/4 times to post up. Alot of times when people say "Yeah I've been boosted with 500whp for 2 years no issues" How many miles is the car actually driven? Is it a year round car? If the car is only taken out on sunny days and good weather or never gets that gas pedal mashed to the floor then that doesnt count for reliability IMO.

[s2d4]

Only one person realised psi isn't the right measurement for this as a bigger turbo will flow more air at the same psi as a smaller one, disappointing really.

[Reaper]

Originally Posted by s2d4

Only one person realised psi isn't the right measurement for this as a bigger turbo will flow more air at the same psi as a smaller one, disappointing really.

actually 3 of us responded without using psi.

Sent from my SAMSUNG-SGH-I747 using Tapatalk

[OICU812]

Originally Posted by s2d4

Only one person realised psi isn't the right measurement for this as a bigger turbo will flow more air at the same psi as a smaller one, disappointing really.

You're correct. My response I suppose was based on most common kits out there. However you and some others are correct, the actual amount is purely dependant on what size blower etc.... Also supporting piping, IC and TB etc etc..

That said the folks that have built these motors up and played with various TC/SCs would know best. I still "think" number 1 factor is the tune however. When reading dozens of failures posts seems to always come back to the quality of the tune/tuner...