How many PSI do you run on your stock motor???

Q&A regarding engines, turbos, and intercoolers and power upgrades

How many PSI do you run on your stock motor???

Stock Boost
9-10 psi
11-12 psi
13-14 psi
15-16 psi
17-18 psi
18+ psi
Total votes : 82

How many PSI do you run on your stock motor???

Postby T-Trac » Fri Feb 23, 2007 1:20 am

I'd like to see what pressures people have been running on their stock motors.

Please respond as follows

Year, Model, miles on motor
How many miles at this psi

You can consider changed headgeasket as stock motor, just dont forget to list it as a mod. For all of you who have modified bottom/top ends, this poll is not for you.
Lets see what we got!!!


88, 165, 100,000
Its been at this pressure for the whole 200 miles that I have owned it.
intake exhaust upgraded turbo
none yet
sweet car, want to make it faster, want to know whos running what without a rebuild and what problems they have had
Members don't see the above ad. Register now - it's free!
Club Member
Posts: 48
Joined: Mon Feb 19, 2007 12:17 am
Location: Columbus, Ohio

Postby cardude » Fri Feb 23, 2007 1:57 am

205000 miles :doh:
running 11-12 psi for 100 miles now maybe
everything is stock except boost guage and mbc
i love it and will go for more after rebuild and fuel.
88 Alltrac
91 zx600
81 kz1000
87 4runner
User avatar
Club Member
Posts: 570
Joined: Fri Mar 11, 2005 5:06 pm
Location: Lincoln NE

Postby reaper0995 » Fri Feb 23, 2007 2:15 am

been running 14psi from 120k miles to 145k miles. was going strong until i blew HG at fuel cut in 5th gear... (cold day= fast boost, oops). has hit 16-17psi but fuel cuts. will remove fuel cut next time (92k miles motor swap soon)
Club Member
Posts: 185
Joined: Mon Jan 10, 2005 9:27 pm

Postby db » Fri Feb 23, 2007 3:28 am

Year, Model, miles on motor 1990 Alltrac, 40,000+ on rebuilt engine
PSI 15-16 psi
How many miles at this psi 40,000+
mods Twos R Us MBC, Blitz DD BOV, Fidanza lw flywheel, CM stage 3 clutch
failures prior to this rebuild, rear main seal, and other oil seals
comments zoooooom!
Black 1990 Celica Alltrac
2011 Ford Fusion SE (Daily driver)
2008 Harley-Davidson Street Bob
Las Vegas, NV
Established Member
Posts: 2177
Joined: Mon Aug 16, 2004 9:20 pm
Location: Las Vegas, NV

Re: How many PSI do you run on your stock motor???

Postby toayoztan » Fri Feb 23, 2007 3:38 am

T-Trac wrote:Year, Model, miles on motor
How many miles at this psi

1993, Alltrac, 205k
11-12ish (depends on temperature)
Since i've owned the car (around 25k miles ago)
SSQV BOV, XS Power DP, Motoria 3" exhaust, ACT Street Disc clutch and ACT Heavy Duty pressure plate
I've overhauled motor basically with rod bearings, all seals/gaskets, hg, hoses, vac lines, timing belt, with usual tune ups
This PSI run is without a boost controller.

2017 Pilot Elite
2014 Juke NISMO RS
1994 Supra TT 6spd
1993 Alltrac -
1977 Celica GT Liftback
2015 Grom
1977 GL1000
User avatar
GTFour God
Posts: 6735
Images: 1
Joined: Wed Aug 11, 2004 5:51 am
Location: Oklahoma

1993 Toyota Celica

Re: How many PSI do you run on your stock motor???

Postby alltracshoak » Fri Feb 23, 2007 3:50 am

T-Trac wrote:Year, Model, miles on motor
How many miles at this psi

8-10 psi(stock)
mods for now are hks 3'' catback
failures,none so far
comments: still waiting to smog and after that, fmic and 14+ psi.
90 st185 - 2018 -
90 st185 -sold 2010?
rip: 92 st185 @ 178k :(
User avatar
Gold Member
Posts: 2647
Joined: Mon Oct 10, 2005 10:13 pm
Location: centralcal CA

Postby donteatbugs » Fri Feb 23, 2007 4:29 am

Year, Model, miles on motor - 1990 st185 150000
PSI- 13-15
How many miles at this psi- 6000
mods- 3 in exhasut, fmic
failures- none so for
comments- still slow
Club Member
Posts: 664
Joined: Sun Sep 18, 2005 4:08 am
Location: Monroeville AL

Postby grip addict » Fri Feb 23, 2007 6:16 am

90, 134000 on old build, 50 on new stock longblock
3 months/ 5 days
intake, exhaust/ fuel, td06, intake, exhaust, mhg & studs, ecu flash
comments :
ran 11 psi very reliably for 9 months, then decided to up it to 15, and it died.
suggestion: don't run more than 12 on a stock motor.
i need to warn everyone-
ATSAaron wrote:You specifically told Matt that "some kid dumped sand into my motor."

don't let some kid dump sand into your motor.
grip addict
Established Member
Posts: 1229
Joined: Mon Nov 21, 2005 6:13 am
Location: kansas city

Postby ST185pinjo » Fri Feb 23, 2007 8:40 am

Year, Model, miles on motor
How many miles at this psi

1992, ST185CS, 186.000[KM]
15 psi
Started with MBC, replacement filter, 3"aussie, FCD.
Now: EMS, fuelrail, EVOIII and some more.
never had failures.
Club Member
Posts: 819
Joined: Mon Aug 15, 2005 4:55 pm
Location: The Netherlands

Postby theUNYTEDone » Fri Feb 23, 2007 11:05 am

ive been at 10.5-12psi for almost a year now.


-3"turbo back exhaust, no cats
-N1 muffler
-2.5" FMIC, 24x12x2.5 ish?
-straight intake

125K as of now, annnd yeah.

built motor should be pushing 22 for race tune and 15-7 on daily tune.
Last edited by theUNYTEDone on Sun Feb 25, 2007 5:22 am, edited 1 time in total.
Nigel in Hawaii
From Hell and Back
User avatar
GTFour God
Posts: 5085
Joined: Sun Jan 22, 2006 10:56 pm
Location: Kamo'ili'ili Town

Postby gt4tified » Fri Feb 23, 2007 6:27 pm

Year, Model, miles on motor: 1992, ST185, 97,xxx

PSI: 7 - 11

How many miles at this psi: 2,000+

mods: Apexi Intake filter, 3" exhaust, SSAC d/p, turboxs rfl bov, walbro in-tank fuel pump, st205 rear (lsd) diff, NGK iridium plugs, ACT clutch & PP, racing hart lightweight 15" alloys, msd blaster ss coil, AVC-R boost controller.

failures: knock sensor

comments: hoping to tune the shit out of the ct26 soon!
ST185 JDM GT-FOUR RC- "White Trash"
GTFour God
Posts: 3151
Images: 5
Joined: Wed Mar 30, 2005 3:22 pm
Location: Trinidad, W.I.

Re: How many PSI do you run on your stock motor???

Postby gearhead313 » Fri Feb 23, 2007 7:22 pm

T-Trac wrote:Year, Model, miles on motor
How many miles at this psi

1988 ST165, miles on motor unknown (JDM rev2 motor)

18psi (20psi peak) for 1500-2000miles about.

swap, tubular mani, borg/IHI GM-3 turbo, tial gate, 2.5" down and back, straight intake, 2.5" piped FMIC.

Knock sensor problem for the last 500miles, have yet to fix it.
ST165 counter:
#2597 - fail
#3193 - fail
#xxxx - sold
#4598 - sold to Canada eh
#7516 - white dragon 11/10ths sold
User avatar
Established Member
Posts: 1361
Joined: Tue Aug 10, 2004 8:17 pm
Location: Pittsburgh, PA

1988 Toyota Celica

Postby 88st165 » Sat Feb 24, 2007 1:52 pm

1988, st165, 46,xxx mi.

on average around 12-14psi... no boost controller just open midpipe

prob about 2k mi on this psi

twin entry swap, straight intake, 3" d/p and m/p, upgraded h/e, constant pump mod....

i am planning on getting an exhaust in hopes to lower it to 10-12psi
Red st165 - Garage Queen turned wannabe track rat
White st165 - slapping back together and hoping for the best
Black st165 - gone
2011 FA5 - Family Truckster
User avatar
Established Member
Posts: 2362
Images: 2
Joined: Sat May 14, 2005 4:09 pm
Location: Chicago, IL

Postby Simba » Sat Feb 24, 2007 2:59 pm

'91 ST185, 2nd gen JDM engine with ~50k on it.

15 psi street (93 octane), 22 psi race/rally (100 octane).

~10,000 @ 15 pounds, probably ~750-1000 at 22.

Mods: JDM computer, tweaked base fuel pressure, Denso Supra TT pump, RC cleaned/flowed 440's (~452cc), CT27 w/ Forge actuator, BayArea 3" TMIC, SSQV, AVC-R, JUN cam gears (-4 ex. +1 in.), K&N FPIK, KO 2.5" DP, 3" Motoria, Innovative wideband. Various other crap.

Failures: Nothing so far, at least related to the engine. I did have a CT27 toss an oil seal, but ATS replaced it, because ATS rocks.

Comments: My goal with the car is to squeeze as much as possible out of a stock engine, CT26 housing and (mostly) stock fuel system, with sacrificing reliability.

So far, it's been very fun, pretty quick and given me no trouble.

Lots of fast, loud things.
User avatar
Established Member
Posts: 2896
Joined: Wed Oct 12, 2005 10:17 pm
Location: New York, NY

Postby Qlynxer » Sat Feb 24, 2007 10:47 pm

88 165 with about 70K on JDM 2nd Gen motor.
15 psi daily driven, for over 15K now.
Mods include Garett Gt28rs turbo, 205 intercooler, Full 3inch exhaust, and just recently I installed a water injection kit. I may bump it up to 17psi for track use.
No failures, but i've had to do a lot of maintanece like radiator, axles, alternator etc.
Quick and relatively reliable, I freaking love it.

Quan L
88 165 w/ 185 swap Gt28rs 205IC
Santa Ana Ca
Club Member
Posts: 477
Joined: Sun Aug 08, 2004 6:44 am
Location: Santa Ana CA


Return to Performance and Power

Who is online

Users browsing this forum: Amate.GT4 and 2 guests