tunning @ 16 psi am I crazy???????????

[supra8903]

I am attempting to tune at 16psi........... should i be doing this

Ok here is my current mod list. Note the headgasket is the factory one, retorqued to 76 ft/lbs, with 96,000 miles on it.

1989 Toyota Supra Turbo

Under The Hood
K & N filter
Greddy Type-S bov
Cooleeze Turbo Inlet Pipe and Hard pipe kit
ARC Intercooler
NX N-tercooler Fogger
Greddy Profect B Type 2 boost controller
Apexi SAFC II
RC 550 injectors and clips
LIPP Lexus AFM
BIC 3” downpie with turbo elbow
BIC 3” testpipe
HKS 3” Turbo exhaust w/ Hollowed cats
Re-torqued headgasket
Flexalite electric fan kit
Greddy radiator cap
Redline water wetter

Stiff Stuff / Transmission
Trust Grex front strut tower bar
H & R Racing springs
Tokico Illumina struts
Toyota Electronic Modular Suspension (TEMS)
Redline transmission fluid
SPEC stage 3 clutch and pressure plate
Techna stainless steel braided clutch line
Rollers / Stoppers
Super Advan SA3R 17inch rims
Advan 90 degree valve stems
Bridgestone Potenza 215 45 ZR17 tires
DuPont caliper paint

Inside
2 Corbeau Forza Racing seats
2” racing harnesses, brackets and sliders
Lotek dual A-pillar pod
Momo Corsa Steering wheel and hub
Gau Donglih Quick release
Autometer Carbon Fiber Boost Gauge
Autometer Carbon Fiber Air-Fuel Gauge
NA voltmeter
AEM EUGO wideband kit
Titan Motorsports Harness bar
Twin NX 10lb bottles
Rear seat delete
Carbon Fiber vinyl door inserts

Outside
Bomex 3-hole front lip and sideskirts
Du-luck rear skirts
TRD front plate
TRD plate covers
Shaved rear wiper
Shaved front grill emblem

ICE
Panasonic 83000 MP3 CD player
Audiobahn Aw1205Q subs
Rockford Fosgate db500.1
Lanzar Vibe 420 4channle
Monster cable wire and fuseblock
Custom fiberglass sub enclosure


Am i going to kill my engine, if so what should i run. Ive been running 12psi for the last year with no issues


Thanks

Joseph
http://www.cardomain.com/ride/2227103

 

[souprat]

i dont think so. i plan on running 15psi but on a maft pro.

 

[robbo185]

it should be fine....but if its stock turbo...i remember reading anything over 15psi isnt very efficient

 

[supra8903]

I read that 16 is about the limit thats why im going with it

 

[jtamulis]

16psi stock head gasket, no.

 

[dbsupra90]

ive looked over your list 3x and dont see a fuel pump upgrade. thats what would make me nervous.

 

[89Turbo]

all that money into it.....you should have put on a metal HG and ARP bolts for insurance.......

 

[staticpat]

Hehe im running 16psi on upgraded ct-26 on stock headgasket (retorqued) with a really good tune so i dont detonate. I got a spare engine awaiting rebuild though, so I'm prepared for meltdown.

 

[Doward]

16psi on a stock turbo = stupid high intake temps = prone to detonation.

detonation + stock head gasket = no.

16psi on stock turbo = no.

 

[bigaaron]

Running 16 psi on a stock head gasket with stock bolts, no problem. Thats great actually!


















.....because I have HKS metal headgaskets, ARP studs, bearings and engine gasket sets in stock and ready to ship as soon as your blows tomorrow!

 

[supra8903]

wwll what is the max psi i should run. This car is mostly a show car, and a weekend car. I plan on rebuilding the engine in the near future, how can i prevent it from blowing, if i cant......... what do you recomend.

joe

 

[figgie]

Running 16 psi on a stock head gasket with stock bolts, no problem. Thats great actually!


















.....because I have HKS metal headgaskets, ARP studs, bearings and engine gasket sets in stock and ready to ship as soon as your blows tomorrow!

lmao!!!

so true

 

[figgie]

wwll what is the max psi i should run. This car is mostly a show car, and a weekend car. I plan on rebuilding the engine in the near future, how can i prevent it from blowing, if i cant......... what do you recomend.

joe

ohh that is simple really.

Now all repeat after me

DO NOT CRANK THE BOOST UP!!!

Yes it is quite that simple and anybody here can do that!

 

[miggles]

tune it for what your running it at now.
All it takes is one bad batch of fuel and you'll be ordering a new motor parts from bigaaron.
Going from stock boost to 1bar you will find a lot of hp gains. boosting up after 1bar you wont gain as much.

 

[jtamulis]

I would suggest you run 10psi on a stock headgasket TOPS, and I would
prefer less. A motor isn't worth the risk for the little addtional power.

Jeff

 

[dbsupra90]

i dont know why everyone is basing it on boost. ok, if it isnt torqued properly the boost will lift the head off the block. but if it was retorqued properly and the hardware is solid i dont see this as a problem. detonation will kill the gasket. whether that be at 20psi or 10psi. i ran my ct upgrade at 14-16psi daily w/ a retorqued stock gasket. after 3yrs when the head was pulled it was starting to show some slight weakness starting around #6 but still no leaks or blown motors or any of the sort. we retorqued andy's head and yes the hg finally let go. 20psi on ct upgrade and 268,000 miles. willie must be in a world of hurt on his. he is running 17psi on a pt67 at over 500rw with a stock gasket. sorry to get off on a rant, but things like this get spread around so much that they become the "truth" when they arent nec backed up by real world experience.

 

[bigaaron]

sorry to get off on a rant, but things like this get spread around so much that they become the "truth" when they arent nec backed up by real world experience.

I disagree. Things like you are talking about are the exception, not the rule.
There is PLENTY of real world experience out there that says the stock head gasket is unreliable and prone to failure at any boost level.

 

[LuvMySilverSupra]

give it a nice tune at 1bar. no need to go any higher. just make sure the afr doesn't get into the 12's under boost and you'll be fine.

15psi is not that big of a deal. fuel pump not needed and he already has the injectors, which u also don't even need yet.

you'll be fine, have fun

 

[dbsupra90]

There is PLENTY of real world experience out there that says the stock head gasket is unreliable and prone to failure at any boost level.

see thats my point. any boost level. people are making it out to be 12psi you are fine but whatever you do dont go 2psi more or it will blow.

 

[Loki]

I ran my car at 14psi all last summer with a stock HG and bolts and never had any problems. When I pulled the head off it this past winter the HG looked great.