Maximum Boost on stock B16A2?

I just wanted to get your guys opinion on this before I do it. I have a 1999 Civic Si with a GReddy turbo kit and intercooler. GReddy says I can go up to 7-8 psi with their FMU and stock internals. Do you think there would be any problems if I went to 8 psi? I think my stock compression is 10.2:1.

Thanks for your opinions

8 psi with tuning is fully possible. Youd get great spoolup due to the higher compression and if you TUNE IT RIGHT (very important) it can be fully reliable

Try a search, this question has been gone over 100 times. and yes, with a good tune you can run 8psi.

with a good tune you can run 12psi . . . . so 8 is def possible, just make sure it's tuned properly and you will be problem free.

no problem with 8psi on the greddy kit on a b16

no problem with 8psi on the greddy kit on a b16

unless you for some reason don't get enough fuel into the engine, but yeah greddy kits are really realiable, not the best for making great power, but hey it's a great place to start.

[QUOTE=vtec92civic]with a good tune you can run 12psi . . . . so 8 is def possible, just make sure it's tuned properly and you will be problem free.[/QUOTE

I would not run 12 psi on stock internals on a si. Unless you want your motor to blow. Ya if you have a different headgasket, and one hellof a freeking good tune you could do it, but for someone who has never owned a turbo car it is definetly not advisable. But like he said 8 will be fine, but you will still need a good tune.

I street/self tuned my own car. Bone Stock d16z6 motor @ 12psi and the motor had a 145k on it and I never had one problem at all. It is possible your motor won't blow unless you do something stupid like take away a shit load of fuel or something like that.

since he will be using greddys fmu for his management system, i wouldnt recommend more then 8, shit idk if i would even recommend 8 after reading some posts that tuners and engine builders have said and the damage from an untuned motor and the potential of a tuned motor. if you want the most hp from that greddy kit and would like it to be alittle safer to run that much boost, i would recommend a fully tuned hondata by a good tuner. like i said after reading a few of there posts if i were to ever boost my car, even 1 psi i wouldnt do it unless its on a tuned engine management of some kind. but then again i always say better safe then sorry so i might be alittle too conservative

I street/self tuned my own car. Bone Stock d16z6 motor @ 12psi and the motor had a 145k on it and I never had one problem at all. It is possible your motor won't blow unless you do something stupid like take away a shit load of fuel or something like that.

Hmmm. I don't really know too much about the d series motors, I was thinking of the b16a motor, and that motor cannot handle 12psi. I still wouldn't recomend it if it is a car you want to be reliable for years to come!

well my motor handled it perfectly fine, so if mine can so can the b16.

We've boosted a stock B16a(1st gen) to 10 psi with the only tuning being done by a S-AFC on stock internals.Mind you, this was with a custom t3/4 setup.We put the motor through shyt and it lasted about 2 years before we blew a piston ring.Mind you, this was in a crx that we ran at our local track every friday night for those 2 years.PLus it was driven daily on an hour commute each way from the guys work and back.

like I said years to come. Ya you can do it and it will last for a few years, but most people want motors that will last longer than that, and 10psi, is very different than 12 psi. 10 I have know can be done, but 12 on a b16 just isn't safe without some work done to the block. I know a few people who have tried it and the results were not pretty. It was pretty damn quick while it was running though!

psi is not the issue cfm's is ;) 10psi on a t25 is not the same as 10psi on a t3/t4

psi is not the issue cfm's is ;) 10psi on a t25 is not the same as 10psi on a t3/t4


So 10 psi isn't 10 psi?

it is but it's irrelevent to how much a motor can handle. You need to look at how much power the stock internals can handle rather then going by psi, because each turbo flows differently some flow more CFM's then others so it's kinda hard to say that your motor can handle 10psi because if you're running a t25 10psi on that will not be the same as a t3/t4. Sorry I don't want to contridict myself but lookat it like this.

Some people running t3 turbos @ 10psi are making 180hp people running t3/t4's at 10psi are making about 220hp so you can see right there that things are different because of the flow rate of the 2 turbos.

Yeah hes right doesnt matter how much boost you make.As long as you stay under 300hp.Thats about all a b series motor can take before you risk the chance of cracking a sleeve or breaking a ring land.So about 260 to 280whp depending on tune.

i wouldnt push 300hp without a really good tune, not no gimpy ass management but a hondata or uberdata

it is but it's irrelevent to how much a motor can handle. You need to look at how much power the stock internals can handle rather then going by psi, because each turbo flows differently some flow more CFM's then others so it's kinda hard to say that your motor can handle 10psi because if you're running a t25 10psi on that will not be the same as a t3/t4. Sorry I don't want to contridict myself but lookat it like this.

Some people running t3 turbos @ 10psi are making 180hp people running t3/t4's at 10psi are making about 220hp so you can see right there that things are different because of the flow rate of the 2 turbos.

Ya, true that. I was just kind of generalizing things. but it is true, the flow is really what makes the dif. Really after you get above like 300 like said above, you should look into upgrading internals, and fuel system, ignition. etc. Although I have seen teggys tuned to have about 320whp that are still running on stock internals, and I believe the origonal fuel pump. Really well tuned though!