Max safe boost? [Merged 10-6]

[Turbolaser]

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

 

[VTRICCO]

ok so as the title states I need to know what a safe boost level would be for a t28 on a stock fuel system. I know i need the supporting mods and all that but my t25 took a crap on me and i needed a replacement. My car hit 15 psi easy on the t25 so can an i just let it run under the stock boost or should i install an mbc and turn down the boost lower to keep things safe and still see the same stock power.

 

[Lordpaxin]

the thing to keep in mind, is while the turbo is running at the same PSI your stock t25 was, its actually pushing a Larger volume of air. even at the same PSI, this creates a higher need for fuel.

id run it lower than 15psi. and get a fuel pump .

and get a way to makesure your not running lean.

its important.

 

[siceclipse]

15psi and lower

 

[dsmmike50t]

Running at 15psi seems like a little too much but then again you never know because all cars run different. The first thing you should do is get a logger to make sure you aren't knocking. I believe 14psi is what everyone suggests running a t25 at with stock parts.

 

[Lordpaxin]

Running at 15psi seems like a litte too much but then again you never know because all cars run different. The first thing you should do is get a logger to make sure you aren't knocking. I believe 14psi is what everyone suggests running a t25 at with stock parts.

its a t28. on stock junk.

 

[dsmmike50t]

Sorry misread, I'd keep it below 15psi to be safe until you get a logger.

 

[Lordpaxin]

http://www.dsmtuners.com/forums/newbie-forum/247876-t28-14psi-stock-fuel.html

http://www.dsmtuners.com/forums/bolt-tech/60093-can-i-run-t28-stock-fuel-system.html

 

[2gGSX]

When I had my T28, the stock fuel pump was the biggest issue. The 450's would have been fine, even on the stock tune (albeit with high IDCs), but I would ALWAYS get knock at the end of a pull from the fuel pump not keeping up.

 

[ILLiCliPSE]

I ran 14psi on the stock 2g fuel system with my T28 for a while with no problems. I wouldnt go above 14-15psi.

 

[under50k226]

My 1993 TSI AWD is getting a new clutch put in, an ACT 2100, he did in fact just put in the ACT TO bearing. but my question isn't how I'll know that the TO bearing will fail, but how much boost can this old stock car take? I got it with under 48k original miles and some sun damage. I guess I need to get the Boost Gauge, Boost Controller, The K&N, and a 2.5" cat back to start*. But if I crakned up the boost Right now- whats safe? 12? 14?

Been reading forums, and I fell like i'm right, even w/o those mods, it should be cool with up to 14.

later.

 

[talon187]

can someone give me some insight on how much boost i can run on 550 injectors ive got a bushur front mont race core big 16g turbo full apexi exhaust 6-an fuel line from tank to rail fpr and 255 walbro fuel pump

 

[Calan]

To both of the above... The short answer is "Who knows?"

I'm not trying to be a smart-ass... the fact is, without getting some type of logger and monitoring what your engine is doing, there is no "safe" amount of boost. Your car might handle anything from 5psi to 25psi, depending on supporting fuel, etc. But if you don't monitor the AFR, knock, etc... there is no way to know if you are safe or not. (And even then, it depends on what shape the motor is in as well as the rest of the driveline).

I'm running around 20psi daily right now, but I've gone up to 23psi without any problems. Of course it is also in the 40's now; back in the summer, I couldn't get above 16-17psi without knocking, even with water/meth injection, FMIC, and all supporting fuel mods. Every car is completely different... there is no correct answer to this question.

Keep it safe (10-14psi with basic mods) until you know exactly what your motor is doing.

Just my .02

 

[dsm-onster]

To both of the above... The short answer is "Who knows?"

I'm not trying to be a smart-ass... the fact is, without getting some type of logger and monitoring what your engine is doing, there is no "safe" amount of boost. Your car might handle anything from 5psi to 25psi, depending on supporting fuel, etc. But if you don't monitor the AFR, knock, etc... there is no way to know if you are safe or not. (And even then, it depends on what shape the motor is in as well as the rest of the driveline).

I'm running around 20psi daily right now, but I've gone up to 23psi without any problems. Of course it is also in the 40's now; back in the summer, I couldn't get above 16-17psi without knocking, even with water/meth injection, FMIC, and all supporting fuel mods. Every car is completely different... there is no correct answer to this question.

Keep it safe (10-14psi with basic mods) until you know exactly what your motor is doing.

Just my .02

Well I'd pay more than a dime if we could just copy and paste your answer .

 

[Calan]

Well I'm old... I had to learn the hard way over the years... and with a lot of help from you guys when I got back into cars after a 20 year break, and into turbos for the first time.

I'm an old V8 guy; but the fundamentals never change

 

[under50k226]

To both of the above... The short answer is "Who knows?"

I'm not trying to be a smart-ass... the fact is, without getting some type of logger and monitoring what your engine is doing, there is no "safe" amount of boost. Your car might handle anything from 5psi to 25psi, depending on supporting fuel, etc. But if you don't monitor the AFR, knock, etc... there is no way to know if you are safe or not. (And even then, it depends on what shape the motor is in as well as the rest of the driveline).

I'm running around 20psi daily right now, but I've gone up to 23psi without any problems. Of course it is also in the 40's now; back in the summer, I couldn't get above 16-17psi without knocking, even with water/meth injection, FMIC, and all supporting fuel mods. Every car is completely different... there is no correct answer to this question.

Keep it safe (10-14psi with basic mods) until you know exactly what your motor is doing.

Just my .02

I totally don't take that as you being a smart ass. Just a totally concise, intelligent and honest answer. What i want to hear. I'll look into getting some monitoring tools like a boost gauge, boos controller and a a/f meter.

 

[talon187]

my motor and trans are pretty much brand new the motor has arp rod bolts head studs mains. eagle rods wesco pistions .20 over mitsu 4 layer headgasket. o ringed block new rods bearings and seals. the trans has all be upgraded

 

[aj7266]

tRYING TO DETERMIN HOW MUCH BOOST I CAN RUN SAFELY ON STOCK HEAD BOLTS

 

[toyotaturbo]

tRYING TO DETERMIN HOW MUCH BOOST I CAN RUN SAFELY ON STOCK HEAD BOLTS

Not to be a smartass or anything, but if you're asking that question, that's telling me that you have some upgrades done to your car. If you've upgraded your turbo or anything else, buy some ARP headstuds and a Mitsubishi multilayer head gasket. The headstuds are only like $85 or so, and the head gasket is less than $100. More importantly, the piece of mind you get from these relatively inexpensive upgrades is priceless!

 

[cruisintalonawd]

My friend has has 23 psi with stock head gasket and the stock head bolts but had the mods to back the 23 psi up too

 

[Street_Killer]

People have went up to 30. Depends on the car, and how far you want to push it.

 

[booster16g]

I have a question pertaining to my internally stock 2g, i was wanting to , sometime this summer, turn my boost up to 20 pounds. Kinda just wondering how quick it would be. Is this a bad idea? I don't want to spin a bearring or blow it up, or even do anything else to hurt my baby haha.

 

[nfernotalon]

You have to upgrade your fuel first, injectors, fuel pump, tuning device. boost gauge

 

[Shady1687]

bad idea...... turing your boost up on a stock car is not how you make your car faster. anyway you will hit fuel if you have a stock fuel system also.

 

[tunethis]

How much boost are you running now?

 

[RallyEclipse98]

Do the proper upgrades first. There's a reason the boost wasn't set to 20 from the factory.