Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[talontsiboy24]

That AFC with a datalogger would be just fine if you don't want to fork out the cash for link just yet.

#1 - Get an AFPR, install it, set it.
#2 - Get a datalogger.
#3 - Start tuning...pretty easy with the SAFC once you start.
#4 - Ignore #3 and maybe #2 if you find a speedshop that can tune it for you and you don't wanna do it.
#5 - Enjoy the car
#6 - Get ECMLink down the road for more fine tuning/functionality
#7 - Keep enjoying the car.

i dont have a datalogger i just bought this car 2 weeks ago and the guy who sold it to me needed his datalogger for his other car

 

[toolegit86]

ok i have a quick question and i have searched. i am going to a gt35r turbo but i want to run my big 16g to its max and i want to ask what you think the max boost is?

big 16g
ported
34mm flapper

680cc injectors
dsm link and will be running pump or race gas

 

[snowborder714]

Do you want to know the max boost you can run period? Or the max boost that will still be in the efficiency range?

 

[Imback]

I don't understand why people ask this question. Why don't you turn up the boost and see for yourself up to what psi it's efficient and your system can handle.

 

[toolegit86]

well both i guess.
whats the most efficent

 

[snowborder714]

Low to mid 20's will probably be what you can reach.

Just make sure to watch your logs.

 

[toolegit86]

well the car had a gt35r and they took it off to make it more streetable. and now it has the 16g and its running 22 pounds now. ive seen a 90dsm with a 16g running 30psi and and holding it.

 

[snowborder714]

That will require some modification (look at this thread for one helpful idea - http://www.dsmtuners.com/forums/tur...oking-strong-internal-wastegate-actuator.html).

That is most likely out of the efficiency range though.

 

[My1GLaser]

You can probably get it to hold 28-30 psi with the WG mods, but the intake temps will probably induce knock. Meth inj can supress that, which is what I am looking into this summer.

Your setup can probably support 24-25 psi on the 680 injectors. I was seeing 95% inj duty on 650s at 24-25 psi. You can increase base fuel pressure to compensate if you have to.

 

[talontsiboy24]

I just would like to know how much boost can a 1997 automatic gsx engine handle without damaging the engine? my stock boost is 14psi when i turn my low setting on my boost controller i got up to like 18 is that ok?

these are my mods:

Forced Performance Green 7cm with external dump
Dejon intake pipe from turbo to a K&N FIPK
Tial waste gate
Ported manifold
Greddy oil catch can
Greddy type S BOV
Greddy IC pipes
Greddy IC
Greddy profec b boost controller
Greddy 60mm silver face boost & EGT
HKS turbo timer
Jumptronix air/fuel meter
Hahn 3" DP
walbro 255 fp
660 injectors
thermal 3" exhaust
PI - dragon torque converter 3500 stall
black spring shift kit
b&m tranny cooler
Apexi S-afc

no fuel pressure regulator
no wideband o2

 

[pboglio]

No right answer. All depends on fuel octane, ignition timing, a/f ratios, intake temps, etc. etc. I've run 28 psi on essentially 106 octane with 23* timing. Around 18-21 psi on pump gas is typical.

 

[gstryyder]

it is all relevant to the tune... as far as your mods, you shouldn't drive your car without an AFPR. especially at that kinda psi... you need proper supporting mods before you plan on going any further than your driveway.

biggest factor is a proper tune with the right supporting mods. you don't have either. so don't try anything fancy until you do so....

you can run more boost than that on the stock block with the right tune and the proper supporting mods.

 

[talontsiboy24]

it is all relevant to the tune... as far as your mods, you shouldn't drive your car without an AFPR. especially at that kinda psi... you need proper supporting mods before you plan on going any further than your driveway.

biggest factor is a proper tune with the right supporting mods. you don't have either. so don't try anything fancy until you do so....

you can run more boost than that on the stock block with the right tune and the proper supporting mods.

yea i know i need a afpr and wideband o2 im gonna get them both soon but when i boost 18.5 its fine so i dunno why your saying not to? and my afc is tuned.

 

[brainlessher0]

yea i know i need a afpr and wideband o2 im gonna get them both soon but when i boost 18.5 its fine so i dunno why your saying not to? and my afc is tuned.

As you raise the boost your tune will change and without a wideband how do you know it was fine? You can run lean and your car will feel fine... Our shop car felt fine as it leaked 2 quarts of oil out the exhaust manifold from the valve stem seals.

 

[olmytsi]

There's no right answer but to get some nice power with that green (great turbo btw...bastard), you need to be in the 20 range.

I would shoot for 22 psi to begin with, tune the car at that, drive it as is for a while and if you feel brave, go a little higher.

Honestly, as long as the tune is good, the only limitation is the octane.


ps: you got a nice setup, invest in better tuning. May I suggest dsmlink?

 

[talontsiboy24]

There's no right answer but to get some nice power with that green (great turbo btw...bastard), you need to be in the 20 range.

I would shoot for 22 psi to begin with, tune the car at that, drive it as is for a while and if you feel brave, go a little higher.

Honestly, as long as the tune is good, the only limitation is the octane.


ps: you got a nice setup, invest in better tuning. May I suggest dsmlink?

Thanks man. Yea in a week I should have a afpr and aem wideband installed. As for dsmlink and eprom is gonna have to wait a bit till I get more money. But u think its ok to run 18psi without doin damage to a stock 4g63 7-bolt? I only use premium 93 octane no race fuel ever....

 

[talontsiboy24]

As you raise the boost your tune will change and without a wideband how do you know it was fine? You can run lean and your car will feel fine... Our shop car felt fine as it leaked 2 quarts of oil out the exhaust manifold from the valve stem seals.

Dude my oil level is never below full mark with boost at 18psi I have no oil leaks.

 

[gstryyder]

Thanks man. Yea in a week I should have a afpr and aem wideband installed. As for dsmlink and eprom is gonna have to wait a bit till I get more money. But u think its ok to run 18psi without doin damage to a stock 4g63 7-bolt? I only use premium 93 octane no race fuel ever....

you don't need dsmlink... eprom would be nice, but you don't NEED that either. you do NEED an afpr, and a wideband is a VERY GOOD thing to have! glad to see you will be getting them soon. you should get a logger also. as for what boost you run, i would say you can safely run 18psi with a good tune. it is all about watching you knock n seeing your timing curve and true a/f ratio, egt's.. all the goodies will allow you to run higher boost. i would say you are going to be safe at 18psi. you could definitley go higher on the stock motor with a good tune and all the right info/ feedback form your car. but you dont have all that stuff. so i would say stay safe and be happy with 18psi for now.

and like stated above. dont run 18psi when you dont have a controll fuel pressure and you dont truly know what the a/f ratio is.. or anything like that. important info is necessary to keep your car from blowing up... and it is all in the tune. it is NEVER just an easy number as to what psi is safe. it is relative to mods and what kind of reading you are getting from your car. good luck with it man!

 

[olmytsi]

Yes, just log it. You should be able to run 22 psi no problem right now. Just keep an eye on the air/fuel ratio and the timing since you can't see knock.

Go in increments tho. Go up to 18....tune some, drive it a few days, and then go up to 20, re tune if needed and then 22.

You may run into some knock with the afc and the big injectors since the afc hides airflow from the ecu (it lies to the ecu) so you get a lot of timing since the ecu thinks you are only flowing say 30 lbs/min when in reality you are flowing close to 40.

As for the afpr, i ran my car with the 255 high pressure pump without one for well over a year. Only issue was trying to dial in the a/f ratio because it was a lil inconsistent. I would get a wideband and dsmlink or a chipped eprom ecu before the afpr. But everyone has their opinion on that.

Again, it should be just fine, use all your tuning tools and take baby steps.

 

[brainlessher0]

Dude my oil level is never below full mark with boost at 18psi I have no oil leaks.

Read what I wrote a couple times and maybe you will understand.

Just because things feel alright and sound alright it doesn't necessarily mean everything is alright. You have an awesome turbo and a car capable of producing serious power, keep the boost to the amount you were tuned for. Once you get your wideband turn it up and have some fun!

 

[talontsiboy24]

you don't need dsmlink... eprom would be nice, but you don't NEED that either. you do NEED an afpr, and a wideband is a VERY GOOD thing to have! glad to see you will be getting them soon. you should get a logger also. as for what boost you run, i would say you can safely run 18psi with a good tune. it is all about watching you knock n seeing your timing curve and true a/f ratio, egt's.. all the goodies will allow you to run higher boost. i would say you are going to be safe at 18psi. you could definitley go higher on the stock motor with a good tune and all the right info/ feedback form your car. but you dont have all that stuff. so i would say stay safe and be happy with 18psi for now.

and like stated above. dont run 18psi when you dont have a controll fuel pressure and you dont truly know what the a/f ratio is.. or anything like that. important info is necessary to keep your car from blowing up... and it is all in the tune. it is NEVER just an easy number as to what psi is safe. it is relative to mods and what kind of reading you are getting from your car. good luck with it man!

my car was last tuned like 3-4 yrs ago and im wondering what do u guys think my th-point should be at on my s-afc with my mods? my low is 20% and hi is 70% right now. this tuner told me to put the low at 35% but i wanna be sure before makin any adjustments to it....

 

[TxR6guy]

Once you get your wideband and afpr and if you plan on running up to 22lb on 93 oct, your gonna have to take out some base timing to keep it from knocking. 22lbs is a nice spot on the green but 28lbs is the sweet spot for the turbo. Do u not have e85 in your area? If u do run a 80/20 mix 80% 93oct 20% e85 and you will be fine on the 660s. @28lbs your duty cycle will be over though.

 

[gstryyder]

my car was last tuned like 3-4 yrs ago and im wondering what do u guys think my th-point should be at on my s-afc with my mods? my low is 20% and hi is 70% right now. this tuner told me to put the low at 35% but i wanna be sure before makin any adjustments to it....

personally it it were me i would put the low th-pt at 35-40% and the high at either 75-80%... just a personal preference. it would give you a better cruising around (wideranged) tune for the low end... and you don't really need to tune for high throttle any less that 75%... when you wanna go you are usually WOT or damn close to it...

but thats just me...

 

[c_k06]

Ok my friend had 1g talon turbo stock. He said that he found a way to adjust the turbo to spool perfectly with the wastegate. He tweaked it enough to have it at 24psi... I dont no if he is tellin the truth but he is pretty smart and he knows what he is doing. I dont think he is lying. Any input????

 

[talontsiboy24]

personally it it were me i would put the low th-pt at 35-40% and the high at either 75-80%... just a personal preference. it would give you a better cruising around (wideranged) tune for the low end... and you don't really need to tune for high throttle any less that 75%... when you wanna go you are usually WOT or damn close to it...

but thats just me...

i dunno i still dont wanna mess with the afc until i get a wideband and afpr i dont wanna screw things up i just left it at where it was last tuned and it was 20% low th-point and 70% hi...i mean does it matter if u go up to 35% for the low without having a afpr and wideband?