Safe boosting PSI T28? - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

S13 curtis · 10-20-2009, 10:59 AM

i kinda dont know what you guys are talking about. u can run more than 14psi on a s14 t28 hell i was running 15psi on the t25.

right now i have a s15 t28 on my car and i took off the GT2871r and my car is tuned for a gt2871r with e-85 and im running the s15 turbo @ 20psi and hold 17-18 at redline and it feels a shit load faster than it did with the turbo at 14psi. it actually breaks traction bad from a second gear roll and on 14psi it wouldnt do that so that should tell you something.

S13 curtis · 10-20-2009, 11:00 AM

20 psi is fine jus have a tune injectors wideband and a fmic

dongoesby · 10-20-2009, 02:30 PM

Quote:

Originally Posted by S13 curtis

20 psi is fine jus have a tune injectors wideband and a fmic

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.

cobras89 · 10-20-2009, 03:02 PM

i run 10psi daily and 14psi with my MBC turned up but i also have a walbro255 and fmic ive never had a problem with it. i also have an aluminum radiator for proper cooling the car has been running like a champ for a long time now. i dont consider myself lucky that i didnt blow anything because i know to raise the boost you need more fuel without more fuel your just an idiot. oh forgot to mention i am running the stock s13 redtop t25 turbo

S13 curtis · 10-21-2009, 06:28 AM

Quote:

Originally Posted by dongoesby

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.

ok bro first off my sr isnt stock or near it and there isnt a safe boost to run on an sr there are people running 25+psi on stock bottom ends on this forum and its not a ka it can take 15+psi like its a walk in the park as long as you have the right fuel and fuel management. im running E85 on my car which is a pretty detonation resistant fuel. and i have 740cc injectors and my afr is @11.7 wide open. so for u who has jus switched over to an SR you should probly read a bit more,and when you can trap 114.6 with an S15 T28 come let me know.

Big Zee · 10-21-2009, 11:28 AM

Quote:

Originally Posted by Homer_Simpson

More like that's the first thing they tossed from their swap. I wired mine in and I'm enjoying it.

I looked for mine, but it didn;t come with my swap

same as the power steering bumpup relay when your at full lock

14+ is thin ice unless you've swappped your HG for a metal one and you have supporting mods isn't it ?

I have a hks adjustable wastegate and veilside racerom and I'm set at 14

very happy

do not unplug your vaccum line again though, friends dont let friends turbo's run wild

sevenstar · 10-21-2009, 11:36 AM

I safely run 15 psi on my car, i do however have fuel managed by a professionally tuned nistune setup, with the s15 turbo, 15psi is more than enough, especially on a stock headgasket, i recommend getting a front mount IC, and a nistune

Big Zee · 10-21-2009, 12:02 PM

Quote:

Originally Posted by dongoesby

Jeez. Not a sr expert here but just reading this thread because I just swapped my ka to sr. I just want to say this guy is being ironic, or he just another guy who's turning up the boost on the stock motor until it blows up.

there are already a whole bunch of threads out telling you a safe boost for stock sr FOR FREE!! telling people to run 20psi is just non-sense. Of course it is "shit-load" faster, it is because you are leaning out, which means more air with less fuel to compress, and just one simple physic of fuel is also to lube your chamber, without it, you are asking to blow up your "shit-load" faster motor.

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

g6civcx · 10-21-2009, 12:28 PM

I said it before and I'll say it again.

It doesn't matter if you just slap a bunch of parts together. The tune ties everything up and makes the whole thing work well together.

Sure, you can probably make a T28 push 20PSI... for about one or two minutes before your stock engine blows.

You have to build everything correctly to take the boost if you want to drive it more than one day at the track without doing a rebuild.

Someone please post the picture of the dollar sign sticker on the boost controller knob.

g6civcx · 10-21-2009, 12:29 PM

Quote:

Originally Posted by Big Zee

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

Lately, I don't know any more...

S13 curtis · 10-21-2009, 04:34 PM

Quote:

Originally Posted by Big Zee

umm fuel is atomized...how does it exactly lube the chamber if its no longer a liquid ?

is that not what oil is for son ?.

if you are lubing your cylinder walls with fuel, you are "washing" your walls, which leads to premature ring failure and your not making any decent power, but burning the gas like theres no tomorrow

lol you should teach that guy a thing or 2

Quote:

Originally Posted by g6civcx

I said it before and I'll say it again.

It doesn't matter if you just slap a bunch of parts together. The tune ties everything up and makes the whole thing work well together.

Sure, you can probably make a T28 push 20PSI... for about one or two minutes before your stock engine blows.

You have to build everything correctly to take the boost if you want to drive it more than one day at the track without doing a rebuild.

Someone please post the picture of the dollar sign sticker on the boost controller knob.

exactly. thank you. my motor is built among A 2871R set up on E-85. decided i was going to sell the car and took off the 2871 and put on an s15 t28 i had sitting around and had it re-tuned.

g6civcx · 10-21-2009, 05:04 PM

I remember one time someone forgot to hook up the wastegate on the T28 and boost spiked up to at least 20.

Lucky there was no damage, but the motor was tuned for 14PSI so it wasn't stock.

10-20-2009, 03:02 PM	#34
cobras89 Leaky Injector Join Date: May 2008 Location: Troy, MI Age: 31 Posts: 86 Trader Rating: (0) Feedback Score: 0 reviews	i run 10psi daily and 14psi with my MBC turned up but i also have a walbro255 and fmic ive never had a problem with it. i also have an aluminum radiator for proper cooling the car has been running like a champ for a long time now. i dont consider myself lucky that i didnt blow anything because i know to raise the boost you need more fuel without more fuel your just an idiot. oh forgot to mention i am running the stock s13 redtop t25 turbo __________________ xxxmotorsport

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10-20-2009, 10:59 AM	#31
S13 curtis Zilvia Addict Join Date: Jun 2008 Location: Orlando,FL Age: 30 Posts: 651 Trader Rating: (13) Feedback Score: 13 reviews	i kinda dont know what you guys are talking about. u can run more than 14psi on a s14 t28 hell i was running 15psi on the t25. right now i have a s15 t28 on my car and i took off the GT2871r and my car is tuned for a gt2871r with e-85 and im running the s15 turbo @ 20psi and hold 17-18 at redline and it feels a shit load faster than it did with the turbo at 14psi. it actually breaks traction bad from a second gear roll and on 14psi it wouldnt do that so that should tell you something.

10-20-2009, 11:00 AM	#32
S13 curtis Zilvia Addict Join Date: Jun 2008 Location: Orlando,FL Age: 30 Posts: 651 Trader Rating: (13) Feedback Score: 13 reviews	20 psi is fine jus have a tune injectors wideband and a fmic

10-21-2009, 11:36 AM	#37
sevenstar BANNED Join Date: Sep 2009 Location: japan. california Age: 47 Posts: 156 Trader Rating: (1) Feedback Score: 1 reviews	I safely run 15 psi on my car, i do however have fuel managed by a professionally tuned nistune setup, with the s15 turbo, 15psi is more than enough, especially on a stock headgasket, i recommend getting a front mount IC, and a nistune

10-21-2009, 12:28 PM	#39
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	I said it before and I'll say it again. It doesn't matter if you just slap a bunch of parts together. The tune ties everything up and makes the whole thing work well together. Sure, you can probably make a T28 push 20PSI... for about one or two minutes before your stock engine blows. You have to build everything correctly to take the boost if you want to drive it more than one day at the track without doing a rebuild. Someone please post the picture of the dollar sign sticker on the boost controller knob.

10-21-2009, 05:04 PM	#42
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	I remember one time someone forgot to hook up the wastegate on the T28 and boost spiked up to at least 20. Lucky there was no damage, but the motor was tuned for 14PSI so it wasn't stock.