Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[RedEyeBanDiT]

I bought a new ebay style 16g with install kit used in the classifieds for 150 shipped to my door. evo injectors for 100 shipped and 190 pump brand new on ebay for 50 buks, then an safc for 75 bucks and adata logger to tune for another 70. total = 445, he wants too much for a used turbo

 

[lou schmouder]

I have seen 28psi on race gas with the bolt on that your talking about haveing. But everyone is right I am selling the same setup with brand new turbo for 500 so your getting ripped off

 

[blackjdm90]

Stock waste gate pressure should be 10 psi with your Evo3 turbo.

It was 12. I was saying that having a direct vacuum line from the wastegate to the j pipe would eliminate the boost solenoid but keeping the stock pressure and since my 16g is not ported I could squeeze 15 out of it.

 

[jrohner]

14 PSI is safe. But if you run a high PSI (20 psi) as an every day drive, it can cause enging wear, and possibly blow the motor. But if you want to set it high to show some ricer in a Civic that he aint fast, then do it. But just make sure you put it back down when your done.

You sound like a ricer yourself. 20psi is not "high", and won't blow your engine.


You can run as much boost as you can get that 16G to hold, if you have the supporting mods for it. You'd be better off just saving some money by running a 14B at 20psi than a 16G at a lowly 14.

 

[joey17]

ive done serching trust me i use the serch buton but i cant find any thing i was just wondering what the max boost would be on the rods/pistons pretty much stock motor say i have a fmic intake and meth kit and logger and boost gauge i just want to no how much i could do with out lifting the head or anything like that.

 

[rayrayx411]

someone asked this yesterday. there is no real way to tell how much your engine will hold. your head gasket could let go 15psi or 50. no way to really tell.

 

[Remyink]

ARP head studs will have a lot to do with it. Helps keep the head down immenselly. Also your fuel system, injectors, fuel pump. I would say about 16PSI is pushing it on stock setup. If you still got the T25 its going to work that harder too.

I like 14PSI on my daily driver. Still on stock injectors and fuel pump. Don't have any problems at 14.

 

[TurboTsiThatFly]

ARP head studs will have a lot to do with it. Helps keep the head down immenselly. Also your fuel system, injectors, fuel pump. I would say about 16PSI is pushing it on stock setup. If you still got the T25 its going to work that harder too.

I like 14PSI on my daily driver. Still on stock injectors and fuel pump. Don't have any problems at 14.

just to ask have you had problems with higher boost levels? or is that were you feel comfortable??

 

[Remyink]

It can do 18PSI. I just dont feel its smart without upgrading the fuel system first. I know you can also hit fuel cut off at any time near or after 16PSI.

 

[knochgoon24]

It can do 18PSI. I just dont feel its smart without upgrading the fuel system first. I know you can also hit fuel cut off at any time near or after 16PSI.

My logging suggests that by 18psi, the T25 is wrung dry. You also start to get >80% IDC with the stock tune on stock injectors.

My suggestion is to get some ARP headstuds first. That will let you run a good bit more boost without lifting the head. The bottom end is good for ~400hp range, some even go further than that. By that point, I'd start upgrading for peace of mind though.

 

[PRJTstealth]

i would say keep it under 25 on a stock block. im running a stock motor... head block internals... and i have a 50 trim on my car with all the supporting mods boosting around 21 psi. and i have no problems. to me i would say its a hp number you should be mor concerned about if your worried about your motor. now if your worried about your turbo thats a whole nother animal. your prob looking at 18 psi MAX on a stock t25 if your lucky. i popped mine at 16 psi.

 

[kottyking]

Have a datalogger and see how much your car can run without running the injectors at max. Every car is different.

 

[my dreamt dsm]

wait CLEARIFY, i keep see people asking this question, but you mean stock stock stock... no fuel upgrades. Or do you guys mean stock block/ head with fuel upgrades.

I know the t25 can only do so much..lets say.... i can do 18 20 psi on a stock block with fuel mods!!!

 

[Dert]

Well you would need a MBC to crank the boost on the wimpy t25, from what I've read on forums both here and other sites, the t25 will max out at 18-19psi, the rest of the car stock can handle it although the t25 will not last long at that high of psi, the stock injectors can handle the flow its the fuel pump that may not be able to support it. Also your tires if they are not ZR speed rated dont even bother crankin up the boost and goin for a rip to see how fast it pulls, you dont want to be going over 130 mph on H speed rated tires as they will fall apart under the friction heat and you may not live through it to drive your car again

 

[_Madman_]

Poppin head at 16psi?! Darn, few of our cars are running at this pressure rate here, my car including. That was the pressure I got after removing BCS.

My mechanic took the car for a spin after a repair during which BCS was replaced with MBC, and because someone was playing with MBC before, the stock T25 boosted up to 1.7 bar (~25 psi) after which the ECU did the complete shutdown.

The car still runs just fine, but you have scared me now! WTF

I thought 16 PSI is pretty safe pressure for complete stocker, and that you could go higher with rewire or larger pump. Although T25 is starting to blow only hot air.

 

[No_Skillz]

Pushing the T-25 past 15 PSI is pointless.

Stock fuel system can safely handle 15 PSI.

Completely stock motor will safely handle less than 20 PSI.

Stock motor with ARP head studs will handle up to 30 PSI.

This is all assuming you know what you're doing, have a good tune and the proper supporting mods.

 

[viperlp01]

I pushed 25 psi on race gas on stock block and head. 16g

 

[lowexpectations]

Pushing the T-25 past 15 PSI is pointless.

Stock fuel system can safely handle 15 PSI.

Completely stock motor will safely handle less than 20 PSI.

Stock motor with ARP head studs will handle up to 30 PSI.

This is all assuming you know what you're doing, have a good tune and the proper supporting mods.

That is true somewhat. I see over 30psi on my stock block motor and it has been like that for over a year. What really comes into play is what was mentioned earlier. How much power and how good is the tune. At 26psi I was at 430awhp and I should be real close to 500 by now. Granted I know at this level it will not take much for the rods to give up.

 

[wishnfor4g63T]

Every Motor is diffrent especially on a 10+ years old car. I mean maintenance is EVERYTHING.

Of course it takes big money to make big power. I'm just going to guess if your gonna sink alot of money into your car your gonna know what ## getting yourself into.

 

[Calan]

The amount of boost that a stock motor (or any motor) can handle is irrelevant. It's all about how much power you are making and how much detonation you have. And even though people usually rate head bolts and head gaskets by how much boost they can withstand, a more accurate term would be cylinder pressure, which is a combination of boost, compression, etc.

A big hog turbo at 18psi can grenade a bottom end as fast as a 16g at 25psi.

Not to be insulting, but if you are asking that question, you don't need to be going above a safe level (12-15psi) anyway until you learn to read and understand logs and tune your car. If you were just curious...well that's different

Good luck!

 

[joey17]

alright guys i mean stock block not worried about fuel or turbo i alreaddy no all about that trust me im about to do a 255 with a afpr and 900 cc injectors yes im goning to re-wire it and i no how dumb the t25 is im prob going to go with a 14b for now and yes i have a laptop i baught a brandnew acer just for my car it matches to and i have a boost gauge im not a newb just want to no what stock internals can handle

 

[crazyquik22023]

honestly with stock internals i wouldn't run more than 13-15 psi on a daily diver and 15 psi might be pushing it. uf u r going to try to run between 15-20 psi i would definetly upgrade at a minimum the fuel pump, pistons, rods, injectors, and head studs... if not ## going t o have problems.... good luck

 

[EclipticalGS]

Well you would need a MBC to crank the boost on the wimpy t25, from what I've read on forums both here and other sites, the t25 will max out at 18-19psi, the rest of the car stock can handle it although the t25 will not last long at that high of psi, the stock injectors can handle the flow its the fuel pump that may not be able to support it. Also your tires if they are not ZR speed rated dont even bother crankin up the boost and goin for a rip to see how fast it pulls, you dont want to be going over 130 mph on H speed rated tires as they will fall apart under the friction heat and you may not live through it to drive your car again

why would he go 130 mph to see if his car pulls?, its takes a highway, and 1st-2nd-3rd....were not breaking any laws here Dert, especially doing twice the stated speed limit.

But hes right Z rated tires are great, but i ahve been up to 110 at a track with H tires, they dont fall apart in seconds, its more like miles of wear and tear, the band start to detach and wear faster.

 

[jrohner]

Well you would need a MBC to crank the boost on the wimpy t25, from what I've read on forums both here and other sites, the t25 will max out at 18-19psi, the rest of the car stock can handle it although the t25 will not last long at that high of psi, the stock injectors can handle the flow its the fuel pump that may not be able to support it. Also your tires if they are not ZR speed rated dont even bother crankin up the boost and goin for a rip to see how fast it pulls, you dont want to be going over 130 mph on H speed rated tires as they will fall apart under the friction heat and you may not live through it to drive your car again

Seriously, . You think since I have 400hp, I'm always going 160+ MPH? No, I'm happy to be to 60 in 4 seconds and then back off. I can go 130 in some random car that has 130hp, but I can still just go 60 in a 400hp car. The trick is to let off and only give it a little throttle when you get you the speed you want to / should go, and you'll keep that speed. You don't always have to be floored, although yes it's fun to.


How can we even answer the question though, boost is just a number, it doesn't actually mean a whole lot. You could have a bad tune and have more cylinder pressure at 25psi than the next guy does at 30. A bigger turbo is usually going to give you higher cylinder pressures than a smaller one at the same psi.

 

[Blurred Talon]

alright guys i mean stock block not worried about fuel or turbo i alreaddy no all about that trust me im about to do a 255 with a afpr and 900 cc injectors yes im goning to re-wire it and i no how dumb the t25 is im prob going to go with a 14b for now and yes i have a laptop i baught a brandnew acer just for my car it matches to and i have a boost gauge im not a newb just want to no what stock internals can handle

900cc injectors are pretty big, more then enough for a 14B/
Are you going with DSMLink?
EGT and wideband o2 gauges are PRIME for tuning.