a ? about boost...

[Punkrawker0586]

on a stock 7mgte how much boost can it handle???

 

[NDBoost]

i wouldnt go past 8-10lbs on stock exhaust..

 

[Punkrawker0586]

so with a 3inch dp, 3inch test pipe and 3inch catback? what would you suggest i also have an intake but as far as stock internals and stock fuel delivery

 

[NDBoost]

10-14lbs

 

[staticpat]

Make sure at the very least to re-torque your stock head gasket before trying to run up the boost too much. You won't get much higher than 10-14psi before hitting fuel cut anyway. You can run right up to fuel cut on stock internals/fuel without any major problems.

 

[MKIIINA]

10-14 psi depending on where fc is. w/ 550s and a lex i could do 20psi before fc but normally kept it to around 18.

 

[lagged]

stock fuel system i wouldnt go any where past 10 pounds of boost.

i detonated at 10 pounds and blew a headgasket due to a failing stock fuel pump.

 

[Bishop92t]

Boost isn't a factor for determing danger level to a motor. It's actually air flow that's the important factor. Since unfortuantely we have no easy way to measure that, the factors we use are the size of the turbo and the modifications to determine the safety of boost. 20psi on a stock CT-26 is not the same as 20psi on a T88. Possibly a better question would be how much power can a stock motor handle. Personally I'd say 500 rwhp would be where you'd want to start upgrading the internals, but you certainly could push the motor further (discounting the HG, which would obviously have to be replaced long before 500). The problem becomes that aftermarket stuff gives you more room for error in tuning but it won't completely save you from user error. A little bit of detonation that may kill stock internals might be handled by aftermarket stuff. Of course aftermarket internals won't save you from bonehead maneuvers like running too lean, running improper octane, running out of coolant/oil, running dirty oil, etc. All in all the 7m is a very stout motor, capable of some serious power. Unfortunately it's just been overshadowed by the superior 2JZ for so long that people discount it as a piece of garbage. In reality it's far superior to most other motors out even today, it just needs some tweaking. A good rule to go by if you don't want to work on the car much is anything below FCO is safe. So long as you don't modify FCO in any way then any amount of boost you can run is safe. Personally I've been running 16-20psi on a 57 trim CT for the past 3 years (40k miles daily driven) on stock internals (with the exception of the HG and ARP's). I attribute that to "doing it the right way", I.E. spending money in the right place. Proper gauges, fuel tuning devices, fuel delivery, intercooler, etc all can extend the life of the motor even pushing almost double stock power.

Short answer: a lot

 

[92turbo4life]

i got open dp at 10 and spikes to 12 and thats all i got besides a bov? hmm lol

 

[lagged]

Boost isn't a factor for determing danger level to a motor. It's actually air flow that's the important factor. Since unfortuantely we have no easy way to measure that, the factors we use are the size of the turbo and the modifications to determine the safety of boost. 20psi on a stock CT-26 is not the same as 20psi on a T88. Possibly a better question would be how much power can a stock motor handle. Personally I'd say 500 rwhp would be where you'd want to start upgrading the internals, but you certainly could push the motor further (discounting the HG, which would obviously have to be replaced long before 500). The problem becomes that aftermarket stuff gives you more room for error in tuning but it won't completely save you from user error. A little bit of detonation that may kill stock internals might be handled by aftermarket stuff. Of course aftermarket internals won't save you from bonehead maneuvers like running too lean, running improper octane, running out of coolant/oil, running dirty oil, etc. All in all the 7m is a very stout motor, capable of some serious power. Unfortunately it's just been overshadowed by the superior 2JZ for so long that people discount it as a piece of garbage. In reality it's far superior to most other motors out even today, it just needs some tweaking. A good rule to go by if you don't want to work on the car much is anything below FCO is safe. So long as you don't modify FCO in any way then any amount of boost you can run is safe. Personally I've been running 16-20psi on a 57 trim CT for the past 3 years (40k miles daily driven) on stock internals (with the exception of the HG and ARP's). I attribute that to "doing it the right way", I.E. spending money in the right place. Proper gauges, fuel tuning devices, fuel delivery, intercooler, etc all can extend the life of the motor even pushing almost double stock power.

Short answer: a lot

sorry to get a little off topic but, when you put the 57 trim on did you ever run it at stock boost while monitering AFs?

 

[Punkrawker0586]

10-14 psi depending on where fc is. w/ 550s and a lex i could do 20psi before fc but normally kept it to around 18.

what is a lex??? i plan on getting 550's, a bigger fuel pump and an safcII for all of my A/F tuning what else would i need to get boost up to 20 and about how much power are you putting down at 20 psi???

 

[Bishop92t]

Yes I've run the 57 trim at stock boost before, but never with a wideband. Just EGT gauge. EGT's don't get hot until you turn the boost up.

 

[fatality]

what is a lex??? i plan on getting 550's, a bigger fuel pump and an safcII for all of my A/F tuning what else would i need to get boost up to 20 and about how much power are you putting down at 20 psi???

An AFM from a lexus V8. fits on with your electronics from MK3 but is bigger, tricking ECU into thinking it is getting less air than it is. DO NOT place on before a bigger fuel pump and 550cc injectors however, cause you will run lean, which you said plan to. would also recommend a wideband O2 sensor.