stock injectors psi limit

[MSPLIFE]

i want to know how many psi of a gt28rs can the stock injectors handle? and also of the stock gt25, thanks guys

 

[_Sloteg_]

Right now with my broken DP, I'm running 14.7 psi on stock injector's on a SS AFC Supermap...


It haul's ball's but,I would not recomend that you run that much boost lol!!!

I ran 11-12 psi for about 2 years with no problems prior to this also......I can't recall what the stock injector max out at but, at 11-12 psi AFR's were alway's below 10.00 the lowest the AEM WB will see.


Hope this help's good luck!

 

[ForceFed]

Right now with my broken DP, I'm running 14.7 psi on stock injector's on a SS AFC Supermap...


It haul's ball's but,I would not recomend that you run that much boost lol!!!

I ran 11-12 psi for about 2 years with no problems prior to this also......I can't recall what the stock injector max out at but, at 11-12 psi AFR's were alway's below 10.00 the lowest the AEM WB will see.


Hope this help's good luck!

And at this PSI I would have to assume you are on the GT25 Stocker...that little detail makes a big difference.

 

[MSPLIFE]

yeah that too is this the stocker turbo right?

 

[MSP2003.5_Nick]

definetly the stock turbo. With my T3/T4 60 trim I topped out the stock injectors at 8psi.

It's easier to think of it in HP and not psi. Stock can do maybe 220 wheel and 575cc can do 340whp. Thats what the buddy who dyno'd my car said. I won't know the limits of the 575cc until I dyno tune it and see how many ponies I can get.

 

[_Sloteg_]

And at this PSI I would have to assume you are on the GT25 Stocker...that little detail makes a big difference.

No sir, I am running on the 28RS..... Like I said I do not recommend him to do so but, That is what I'm running currently.



Also,a few member's here (DSMConvert,TampaBlackMSP) have rode in my car at 11-12 psi and have seen the richness on my WB and what was logged on the AFC....

 

[Deatschwerks]

These are just approx. numbers, but for a 4cyl id say the limit would be:
440cc~~180-220whp
550/565cc~~~280-300whp
650cc~~~350whp
750cc to 1000cc~~ between 450 and 550 hp

 

[Deatschwerks]

Thats for standard, 91 octane pump gas, tuned conservativly

 

[Deatschwerks]

Also depends on size of the motor as well. My 2.5L w/out watermeth, dyno'd at 240whp with the Injector duty cycle steady at 74%, thats quite of bit of room to grow.

 

[ForceFed]

Unfortunately I dont buy your Scaling at all....COnsiring the stockers are what.....290cc....on an MSP that is 170HP stock...and plenty have gotten 220+ out of them easy....then the next step is the WRX 440cc's.
Not too many people need much more than that on these cars unless heavily built...But hey....your the injector expert.

 

[shane02pro5]

Those seem more like awd numbers? Kind of low

These are just approx. numbers, but for a 4cyl id say the limit would be:
440cc~~180-220whp
550/565cc~~~280-300whp
650cc~~~350whp
750cc to 1000cc~~ between 450 and 550 hp

 

[Deatschwerks]

i have a subie so yes those would be awd numbers, but conservative for any vehicle. As far as your fuel goes you never wanna push the limits to hard.

 

[Deatschwerks]

Unfortunately I dont buy your Scaling at all....COnsiring the stockers are what.....290cc....on an MSP that is 170HP stock...and plenty have gotten 220+ out of them easy....then the next step is the WRX 440cc's.
Not too many people need much more than that on these cars unless heavily built...But hey....your the injector expert.

I do know a lot about injectors, but since it varies so much from car to car, i always give a conservative number. Im not as familiar with the power numbers from the MSP as I am other cars, but im learning pretty quick.
And im talking wheel horsepower not flywheel horsepower. I havent seen many 4 cyl cars can get 220whp out of a 290cc injector without being at 100% duty cycle at stock FP
Here is our fuel calculator its probably gonna give about the same info i do
http://www.deatschwerks.com/catalog/fuel_calculators.php

 

[Metallic36]

I thought the same.. seems like the 440s would allow for more than that.

Unfortunately I dont buy your Scaling at all....COnsiring the stockers are what.....290cc....on an MSP that is 170HP stock...and plenty have gotten 220+ out of them easy....then the next step is the WRX 440cc's.
Not too many people need much more than that on these cars unless heavily built...But hey....your the injector expert.

 

[Deatschwerks]

I thought the same.. seems like the 440s would allow for more than that.

You can always raise fuel pressure to get more out of an injector, i should probably clarify that im talking about stock FP

 

[speedy gonzales]

With 440 wrx injectors I have 230 WHP with 85% duty cycle but my EMS(Megasquirt) inject in batch.

 

[MSPLIFE]

another thing guys, if im running to rich could i help it but installing a fuel presure regulator? and if so where could i find one that plugs to the stock fuel rail?

 

[dstmsp03]

there is already a fpr on our cars.. Best bet to lean out if u r rich is ems!

 

[MSPLIFE]

but can i lean it a little thru the stock fpr

 

[dstmsp03]

stock fpr isn't adjustable