Boosted Stock Block LS. What psi to run?
03-20-2005, 08:30 PM
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Boosted Stock Block LS. What psi to run?
Right now my car is currently running 5psi off the drag gen 3 turbo kit and is really in need of tuning. I dynoed the car when I had a dyno day for my forum and my car did 184whp and 169tq and when it went into boost it went so rich it went off the scale, So I went and bought a bunch of things to get my car to run right and be able to hold more boost safe with the correct timing and fuel maps ect ect. this is what I did.
I just bought
rc 750cc injectors
NepTune
BBK 255LPH fuel pump
Hallman MBC
3 Bar map sensor with pig tail
My Car is about to be tuned By Jason Hunt and was wondering on a stock block LS what boost should I tune up to for daily driving?
I just bought
rc 750cc injectors
NepTune
BBK 255LPH fuel pump
Hallman MBC
3 Bar map sensor with pig tail
My Car is about to be tuned By Jason Hunt and was wondering on a stock block LS what boost should I tune up to for daily driving?
03-20-2005, 08:36 PM
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Re: (93turbo16)
Yea, I just bought another LS block im starting to put together. 
Thats what I went to high and also did the 3 bar map. I dont want to be limited and have to re buy parts over and over. I just like to get things done right the first time and never have to go back and replace it unless its broken. Ya know?
Thats what I went to high and also did the 3 bar map. I dont want to be limited and have to re buy parts over and over. I just like to get things done right the first time and never have to go back and replace it unless its broken. Ya know?
03-20-2005, 09:18 PM
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Re: (Jason300zxTT)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jason300zxTT »</TD></TR><TR><TD CLASS="quote">Yea exactly... Will the motor hold 14psi or should I just run no more then 12?</TD></TR></TABLE>
Most people usually say it's not about psi it's about how much power and torque the block can handle. For a ls I think the safe limit is around 300whp.
Most people usually say it's not about psi it's about how much power and torque the block can handle. For a ls I think the safe limit is around 300whp.
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03-20-2005, 10:08 PM
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Re: (Tchleung)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tchleung »</TD></TR><TR><TD CLASS="quote">Generally I would try to keep any stock B series below 300WHP.</TD></TR></TABLE>
yep
yep
03-21-2005, 06:36 AM
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Re: (VTC_omgihavetorque_CiViC)
In my experience 200whp in a teg will produce plenty of mid range torque to keep you satisfied for daily driving. It will also help you spare your internals. I say that should be your goal for a low boost setting
03-21-2005, 12:58 PM
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Re: (Stewie)
my buddie ran 13psi on his Ls and made 293 with AEM it ran great and didn't hurt the motor , and he bea tthe **** out of it.. he ran a 12.07 on 22" slicks
03-23-2005, 07:30 AM
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Re: (Jason300zxTT)
psi has nothing to do with hp
there are people running 7lbs making 300+ hp
300 limit on a b seems pretty reasonable, but its all in the tune
good luck with your setup
there are people running 7lbs making 300+ hp
300 limit on a b seems pretty reasonable, but its all in the tune
good luck with your setup
03-23-2005, 09:30 AM
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Re: (lalspeed)
well the psi does depend on how much HP it will produce. No one is going to produce 300 hp witha t3 on 4 psi with a b series.
Now it's more dependant and a lot easier for us to give you a more accurate answer if you tell use what your setup is and what you're planning on doing....IE turbo, wastegate (spring pressure), etc
I personally am shooting for 250 hp with my b18a1, t3 42/48 stock internally gated, cheap *** ebay BOV, JRC 6" IC, Uberdata, 450s, Cast log style mani (no clue of the brand [no wastegate flange]). I figure the t3 internal gate is set at 7-8 psi.
My last set up made 253 hp with a t3 54 trim on 8 lbs with the b18b1.
Now it's more dependant and a lot easier for us to give you a more accurate answer if you tell use what your setup is and what you're planning on doing....IE turbo, wastegate (spring pressure), etc
I personally am shooting for 250 hp with my b18a1, t3 42/48 stock internally gated, cheap *** ebay BOV, JRC 6" IC, Uberdata, 450s, Cast log style mani (no clue of the brand [no wastegate flange]). I figure the t3 internal gate is set at 7-8 psi.
My last set up made 253 hp with a t3 54 trim on 8 lbs with the b18b1.
03-23-2005, 09:56 AM
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Re: (92civicb18b1)
you should leave the boost level up to your tuner.. Allow the tuner to push the car as he feels comfortable. If he says 10psi then thats it. Thats the safest way to boost the car.
03-23-2005, 09:56 PM
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750cc injectors & upgraded fuel pump?? lol
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home.
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home.
03-23-2005, 10:01 PM
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Re: (kroze)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kroze »</TD></TR><TR><TD CLASS="quote">750cc injectors & upgraded fuel pump?? lol
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home. </TD></TR></TABLE>
with the price being the same for 270 up to 750cc why not get the bigger set? you can have room to grow later instead of buying another set
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home. </TD></TR></TABLE>
with the price being the same for 270 up to 750cc why not get the bigger set? you can have room to grow later instead of buying another set
03-23-2005, 10:09 PM
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Re: (kroze)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kroze »</TD></TR><TR><TD CLASS="quote">750cc injectors & upgraded fuel pump?? lol
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home. </TD></TR></TABLE>
Yah lets see...a Supra with 6 cylinders...so that's 73 HP per cylinder...a Honda B18a has 4 cylinders...so the same 440's in a B18a can support 292 HP +/-.
See where I'm getting at? 750s's will be good for roughly 450-500 HP at 95% duty cycle. .An upgraded fuel pump is pretty much necessary with any FI Honda/Acura cause the stock pumps dont flow much. And I'm sure Neptune is more then capable of making the 750's idle like stock. And with a built motor and a 3 Bar map sensor it looks like he has big plans for the car, so I dont think 750's are too big.
Modified by BlueShadow at 11:39 PM 3/23/2005
i'm surprise it didn't drown your engine with fuel.
our supras can make over 440 horsepower with stock 440cc injectors.
bigger isn't always better.
unless your looking to run over 600hp (on stock engine?). leave those injectors home. </TD></TR></TABLE>
Yah lets see...a Supra with 6 cylinders...so that's 73 HP per cylinder...a Honda B18a has 4 cylinders...so the same 440's in a B18a can support 292 HP +/-.
See where I'm getting at? 750s's will be good for roughly 450-500 HP at 95% duty cycle. .An upgraded fuel pump is pretty much necessary with any FI Honda/Acura cause the stock pumps dont flow much. And I'm sure Neptune is more then capable of making the 750's idle like stock. And with a built motor and a 3 Bar map sensor it looks like he has big plans for the car, so I dont think 750's are too big.
Modified by BlueShadow at 11:39 PM 3/23/2005
03-24-2005, 12:46 PM
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Re: (BlueShadow)
750's are not going to idle like stock, don't care who makes em.....
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....
....but if the engine's gonna be built, you'll need em
remember to run hotter plugs if this is a daily driver as you'll be spending a moderate amount of time idling at stoplights and such. (to burn off the deposits the rich idling is gonna leave on the plugs) or it's gonna be misfire city....
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....
....but if the engine's gonna be built, you'll need em
remember to run hotter plugs if this is a daily driver as you'll be spending a moderate amount of time idling at stoplights and such. (to burn off the deposits the rich idling is gonna leave on the plugs) or it's gonna be misfire city....
03-24-2005, 01:08 PM
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Re: (H22A_NeThing)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22A_NeThing »</TD></TR><TR><TD CLASS="quote">750's are not going to idle like stock, don't care who makes em.....
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....
....but if the engine's gonna be built, you'll need em
remember to run hotter plugs if this is a daily driver as you'll be spending a moderate amount of time idling at stoplights and such. (to burn off the deposits the rich idling is gonna leave on the plugs) or it's gonna be misfire city....</TD></TR></TABLE>
I don't think you kow what you're talking about. 750's can def. idle like stock. I've seen it personally and why run hotter plugs for idle....if you tune it correctly you don't need that at all. Misinformation here
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....
....but if the engine's gonna be built, you'll need em
remember to run hotter plugs if this is a daily driver as you'll be spending a moderate amount of time idling at stoplights and such. (to burn off the deposits the rich idling is gonna leave on the plugs) or it's gonna be misfire city....</TD></TR></TABLE>
I don't think you kow what you're talking about. 750's can def. idle like stock. I've seen it personally and why run hotter plugs for idle....if you tune it correctly you don't need that at all. Misinformation here
03-24-2005, 01:15 PM
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Re: (adseguy)
hotter plugs aren't NECESSARY but you should do this for a daily driver with bigger injectors as insurance....
and 750's might idle like stock...if your idle's 1000+rpm...
you are going to idle rich with these injectors....sorry buddy
Read the WHOLE post next time (daily driving is a lot of sitting at lights, stop-signs, etc.)
I'm sorry do we all have personal tuners and drive race-cars here......DAILY DRIVER....I'm not trying to be dick, really
Modified by H22A_NeThing at 2:28 PM 3/24/2005
and 750's might idle like stock...if your idle's 1000+rpm...
you are going to idle rich with these injectors....sorry buddy
Read the WHOLE post next time (daily driving is a lot of sitting at lights, stop-signs, etc.)
I'm sorry do we all have personal tuners and drive race-cars here......DAILY DRIVER....I'm not trying to be dick, really
Modified by H22A_NeThing at 2:28 PM 3/24/2005
03-24-2005, 01:18 PM
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Re: (H22A_NeThing)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22A_NeThing »</TD></TR><TR><TD CLASS="quote">750's are not going to idle like stock, don't care who makes em.....
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....</TD></TR></TABLE>
I have heard of one person getting their 1000cc injectors to idle with Uberdata. So if that's possible with Uberdata, why not with Hondata and 750's? There are several people on the Uberdata forums that are running 750's and I haven't heard of any issues with their idle. It is going to be hard to tune them for idle and partial throttle, but it's not impossible. ALSO I said it is possible to get them to idle like stock. As opposed to not being able to idle with them at all. Read Kroze's post about 750's and a 255lph pump "drowning an engine in fuel". 750's aren't going to "drown an engine in fuel", with his Hondata he could probably get them to idle pretty close to stock.
And yes, I would not recommend running injectors at 90% + duty cycle. I was just trying to give a general idea of the max amount of power you could get out of them.
and running your injectors at 95% duty cycle is something you should NOT do (at least not for very long periods of time)....injector flutter becomes an issue then....</TD></TR></TABLE>
I have heard of one person getting their 1000cc injectors to idle with Uberdata. So if that's possible with Uberdata, why not with Hondata and 750's? There are several people on the Uberdata forums that are running 750's and I haven't heard of any issues with their idle. It is going to be hard to tune them for idle and partial throttle, but it's not impossible. ALSO I said it is possible to get them to idle like stock. As opposed to not being able to idle with them at all. Read Kroze's post about 750's and a 255lph pump "drowning an engine in fuel". 750's aren't going to "drown an engine in fuel", with his Hondata he could probably get them to idle pretty close to stock.
And yes, I would not recommend running injectors at 90% + duty cycle. I was just trying to give a general idea of the max amount of power you could get out of them.
03-24-2005, 01:24 PM
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Re: Boosted Stock Block LS. What psi to run? (Jason300zxTT)
I was running 11 on stock bottom end with my super 60.....actually spiked to like 14 one time on an off ramp. Never had any problems.