| Author |
Message |
Shan Guansena
Tinkerer
victoria
soarer GT-T
Posts: 43
Reg: 11-2009
|
hay guys i got a manual 91 TT i recently i bought a gizzmo boost controller and i went to this backyard style mechanic to get quote to see how much it will cost to install it he was like since it has all ceramic wheels and that its going to be un safe to run it and max psi u can run is like 12 psi but now im running 11 psi with fmic, a bov and also have exhaust done from the catty (im also planning to get it done from the turbo soon) and i sore some threads on here saying running 14 psi with stockies, so i dunno if he no his stuff or just talking some crap. thanks guys any help will do.. |
Matt Sartori
DieHard
Western Australia
Rx7
Posts: 848
Reg: 08-2008
|
Most people can run fine on 14psi without any problems, wouldn't want to run any higher without a dump pipe and a very free-flowing exhaust.
But it all depends entirely on how your car has been treated |
Mark Pattel
TryHard
Queensland
RT142 with a 1jz and R154 5 speed
Posts: 118
Reg: 04-2006
|
12psi is a pretty general rule with ceramic turbos. I have heard a lot of skyline drivers say to not boost there stock turbos past 12psi. If I was you I would just wait till you have a full exhaust and with any luck the boost might naturally rise to a level your happy with, if its running 11psi now I dare say it may rise to 14/15psi then you might need to worry about a fcd instead of a boost controller. |
Marc Hoffmann
TryHard
Vic
Soarer TT
Posts: 270
Reg: 07-2009
|
the max psi thing is a bit of a myth, the fast 1/4 guys and the guys that have actually done it (not forum mechanics) tend to run some big psi.
the fastest stock turbo guys are running 21psi+, but from my reading, the two biggest killers of these turbos are heat (for the wheels) get a dump pipde made up and freeflowing exhaust for that, and bad oil (bearings) dont skimp on your oils. |
Boris Siljanoski
Goo Roo
Western Australia
LS400 + Soarer.
Posts: 1159
Reg: 11-2007
|
I would put the boost controller away and get a properly designed dump pipe first. |
Austen Menze
Goo Roo
WA
GT-TL
Posts: 1162
Reg: 07-2009
|
I've been running 19-20psi for about a year or so now. On stock dumps for most of that time. It goes hard. |
Guy Moore
TryHard
QLD
mmm manual & lsd goodness
Posts: 193
Reg: 03-2010
|
wouldn't the max be 14 psi till he removes the boost cut
I ran 17 psi on the stock y piece for months and it went hard got dumps for it now and goes screams even harder now |
Shan Guansena
Tinkerer
victoria
soarer GT-T
Posts: 44
Reg: 11-2009
|
Ahh awesome thanks for the info guys I should of got dumps before the boost controller. So il wait till I get my dumps to check how much I'm running and if it's worth it to run the controller. Thanks for the info again guys.
For the guys running a full exhaust, what r the specs for the exhaust?? |
Austen Menze
Goo Roo
WA
GT-TL
Posts: 1163
Reg: 07-2009
|
3" front pipe, 3" cat, splitting into twin 2.75" |
Guy Moore
TryHard
QLD
mmm manual & lsd goodness
Posts: 194
Reg: 03-2010
|
2 1/2 inch dumps off each turbo into 3 inch straight through to a apexi 4 1/2 inch cannon |
Evan Kaio
DieHard
Beautiful sunny good @ rugby 'Canes' country
'91 UZZ31. 92 TT
Posts: 750
Reg: 01-2007
|
Guy Moore wrote on Thursday, October 07, 2010 - 11:19 am:2 1/2 inch dumps off each turbo into 3 inch straight through to a apexi 4 1/2 inch cannon
How noisy (db) is that, Guy?
I'm looking the same but with a 3 inch hi flow muffler. |
Guy Moore
TryHard
QLD
mmm manual & lsd goodness
Posts: 198
Reg: 03-2010
|
not sure of the db reading
It's loud in WOT as soon as you stand on it she screams
but its not to bad cruising around |
Lew Radbourn
Goo Roo
Queensland / Goodna
jzs147 93 TT / uzz30 93'/
Posts: 3248
Reg: 07-2005
|
Shan;
Mate get the dump pipes first.
2 1/2 of the backs of each turbo collect them into a 3 " pipe down around the bellhousing of the gearbox.run a 3" pipe past the gearbox into the tunnel
place a High flow stainless cat and a hot dog in the tunnel.
hot dog is a 5" dia 14" long straight through muffler.
this will stop and droning noise .
then split it to twin 2 1/2" pipes to the rear mufflers
I use a 2 1/2" centre/offset magna flow stainless muffler. then you can place of and tips of you choise to the way you want to make your car look
Now all of this is done with mandrel bends
If you can't use mandrel bends only press bends. From the 3" collector at the end of the dumps bring the pipe size up to 3 1/2"
but you may have some droning noises in the cab of the car.
You will probably find that doing a good exhaust system, the boost of your turbos will rise about 2 psi any way.
Also what marc has said above is correct about guys running 20 odd psi with stock turbos but also remember that is for about 10 sec down the 1/4 mile
I ran my old soarer on 18psi for several years (rebuilt ceramic turbos).
there is some thing else to remember as well mate
the more air you force into the engine MAKE SURE you have enough fuel supply to compensate for the extra air.
always put your car on a dyno to check the air fuel ratio is safe to run the higher psi.
You can not tune a standard toyota ECU. the dyno is just to check the air fuel ratio and it may even allow you to run more boost than you thought you could.
best of all have fun doing it,I know i have for the past 12 years |
Ty Mackay
Goo Roo
WA
Soarer TT 1jz-gte
Posts: 1521
Reg: 01-2009
|
i've run 17psi on stock turbos with 250k's on the clock with the same turbos without ANY issues... cept for the fact i have a blown head gasket! GO CHEMIWELD! but when the gasket blew i did in fact turn the boost off to stock so yeah haha |
Jeff Bedsor
DieHard
QLD
TT
Posts: 919
Reg: 10-2006
|
Lew Radbourn wrote on Friday, October 08, 2010 - 12:08 am:20 odd psi with stock turbos but also remember that is for about 10 sec down the 1/4 mile
Lew, mine is a daily driver and I don't drive it gently, currently running about 26psi.
I still had the standard dumps and pipe to the tranny when I ran high 11's, so the dump pipe is not that big of a factor.
My advice is
-get a 3 inch exhaust from the tranny back with as little restriction as possible
- a Walbro fuel pump
- a wideband O2 sensor to keep an eye on AFR's
- make sure your AFR's are on the rich side 10.5 to 11.5 - 1 under full power.
- only run up to about 18 psi without tuning (while keeping an eye on AFR's)
The aim is to get lots of air in and out with the least restriction while keeping the charge cool so as not to overheat the ceramic wheels. Anyway that's my theory and it's worked well for me so far. |
Matthew Sharpe
Goo Roo
North Island
JZZ31
Posts: 5925
Reg: 10-2005
|
Don't go for a •••••• single canon - they look arse even on other cars, let alone the Soarer. |
Walter Gillmore
DieHard
QLD
TT JZZ30
Posts: 827
Reg: 07-2009
|
i run 16psi daily, everywhere actually. and 21 psi on overboost function, stock turbo's, stock intercooler, stock exhaust and stock dumps. no problems at all so far. but i do have an EMB installed and tuned by myself. and also a manual shift controller for the auto. in drive gear, locked converter the tires will spin as soon as i hit overboost and 3000rpm in the wet. at around 70kph nice predictable and fun  |
Austen Menze
Goo Roo
WA
GT-TL
Posts: 1169
Reg: 07-2009
|
Jeff Bedsor wrote on Friday, October 08, 2010 - 09:19 am: currently running about 26psi.
Nice!
+1 on Matt's post, single cannons on a Soarer look ugly. |
Ty Mackay
Goo Roo
WA
Soarer TT 1jz-gte
Posts: 1523
Reg: 01-2009
|
yeah single cannons on a soarer are NASTY!!!! |
Matt Sartori
DieHard
Western Australia
Rx7
Posts: 852
Reg: 08-2008
|
I like them 
but i like driftpigs :3
and single systems always seem to sound better. |
Ibo Kale
Tinkerer
Western Australia
SC400/TTnow
Posts: 34
Reg: 01-2006
|
Hi All, Regarding the exhausts. I've got 3 inch dump coming off turbo, then it goes into stock cat entry pipe (i think that is front pipe?) then its all stock up to the mufflers, which are two blitz nurspec... would you say the middle section of exhaust between dump and mufflers is overly restrictive? I don't really want to change as i want to keep it quiet as possible... |
Shadi Sabbagh
TryHard
Victoria
Soarer TT GT-TL
Posts: 193
Reg: 03-2009
|
YOU WANT THE ULTIMATE EXHAUST!!!!MINE!!!
2.5" Stainless Steel Dumps of each turbo, which collects into 3" downpipe into 100cpi Stanless steel Race Cat at the gearbox, then split into two 3" Twin pipes, each leading to a 3" sound Controlled Varex Cannon with 5" Tips.
ALL THE BENDS ARE MANDREL BENDS!
This Exhaust costed about $3000, BUT, it goes from stock quite to ROARING LOAD once the cannons have been opened, All controlled anywhere within 10 metres of the car from two remotes on my keychain!
It gave me ENORMOUS power, With just a base map from the Forum on my emanage blue, its pulling 223rwkw on just under 14 psi. This jump was from 148 rwkw with a front mount and catback.
The amount of torque is SCARY, you can barely move forward in your seat!
Still to come are 440cc injectors and cam gears, plus a good tune from Cihan, should easily see past 250 rwkw!
So, if you take my advice i would say FULL 3" Mandrel Bent, is the best way to go on a soarer TT. As its a Turbo car it does not need Back pressure, dont listen to any loosers(exhaust shops) that say you need back pressure or the car wont run, THEY DONT KNOW what they are saying! As i had this problem as ••• wanted to make my exhaust because apperently without back pressure, the car wont even drive and i will have to tow it away!!!
I proved them all wrong by going back and showing them my 3" exhaust and telling them not to speculate on what they dont know about!!
Any way, THE ABOVE EXHAUST IS THE ULTIMATE SYSTEM!!!! |
Dean Kempers
Tinkerer
Victoria
TT
Posts: 98
Reg: 03-2009
|
Have you got pictures of the said "Ultimate system" Would be good to get an idea where exactly the system sits.
I could then show my exhaust shop along the lines of what i want.( Pretty much the same as what you described).
Cheers. |
Scott Wilkes
Goo Roo
Tasmania
92 TT Factory Manual, 70 HG GTS Monaro
Posts: 1806
Reg: 10-2008
|
i had lews seperated wastegate dumps of my standard twins.
I opened up the standard cast exhaust manifolds as they are pitiful standard, then port matched the turbo exhaust inlet to the manifold and opened that up slightly. Also enlarged the wastegate 2.5mm each to help control the extra flow.
From the lews dumps into 3 inch mandrel bent 304 grade stainless steel, back to just before the diff, then split using a custom made (by me and my mate) split collector as all the ones on the market were pitiful, split to twin 3 inch 304 grade stainless into modified blitz nur spec mufflers
All of this was quoted at exhaust shop to be roughly 3K.
Me and my mate tig welded it all and fabricated it for under 500 This is with 6 metres of stainless 3 inch pipe, 8 3 inch stainless bends (45s and 90s) Still have about 3 metres of stainless left over for my 4g63T sigma
Now with the single GT3076R its a direct 3 inch dump to that exhaust. With a pressue guage plumbed into the exhaust we are getting no pressure build up (backpressure) so works good |
Shadi Sabbagh
TryHard
Victoria
Soarer TT GT-TL
Posts: 194
Reg: 03-2009
|
ok Dean will take pics for you and post the up! |
Previous
