I'm thinking about upgrading my turbo in my LS integra. I just did my pistons and rods and I want to be pushing 300hp around 16psi or less. I have a t3/t4b (not sure of the specs) but I hear ppl with sc34 on their LS are making around the hp I wanted at that psi (300). I have never dynoed my t3/t4b but dont want pay for the extra dyno time again if I can do everything right the first time. Is the t3/t4b similar to the sc34 (60/.63)? Will this turbo be good for my LS (power and lag wise). Should I just stay with the t3/t4b or do the upgrade??? Any info will help.

 

anyone??

 

if you want 300whp, there is NO reason to upgrade, it really doesn't matter the psi you make 300whp @. Ive seen a few dyno's of t3/to4b's making 370ish..

 

Why do you measure your goals in PSI and horsepower, instead of just horsepower? Air pressure means about as nothing so long as your turbo is still efficient.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mpir3 &raquo;</TD></TR><TR><TD CLASS="quote">if you want 300whp, there is NO reason to upgrade, it really doesn't matter the psi you make 300whp @. Ive seen a few dyno's of t3/to4b's making 370ish..</TD></TR></TABLE>


I know I can make 300 with t3/t4b but at something close to 20psi and I don't want to boost that hi (afraid I might crack something). Will a sc34 be really laggy and I want to make the same hp at a lower boost level (16psi) if possible.

 

4psi isn't gonna make a difference.

O/T but what's the deal with the Viper Alarms? PM me.

 

how much boost can I run before I break something? I believe around low 20psi is when things start getting really bad unless you have your block sleeved. Is this right.

PMed you back on the alarms

 

Boost pressure has nothing to do with your sleeves or anything cracking or breaking in your engine setup. Its all about tunning and power. 15psi of boost can equal 250hp or 350hp depending on your turbo. Its the power that can kill your engine not the psi.
So set your goals with hp and not boost pressure for future reference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tur*bLu &raquo;</TD></TR><TR><TD CLASS="quote">Boost pressure has nothing to do with your sleeves or anything cracking or breaking in your engine setup. Its all about tunning and power. 15psi of boost can equal 250hp or 350hp depending on your turbo. Its the power that can kill your engine not the psi.
So set your goals with hp and not boost pressure for future reference. </TD></TR></TABLE>


I always thought the more you boost, the better the chances are for a cracked sleeve (maybe due to heat, the force, etc). I want to hit 300hp but I don't want to be close to the max pt bc my block is not bulletproof. So a cracked sleeve wont happen unless I make extremely huge power or from boosting at hi psi (say 20 -22psi)? I remember reading about hondas being good for around 20psi before needing the block to be sleeved for more boost. Please clarify this, thanks.

 

it does not matter if your running 20psi making 300whp or 16psi making 300whp, as long as your turbo is still effecient. BTW: with pistons and rods you should be able to make alot more than 300whp, the sleelves can handle ALOT of power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.DC2TurBo &raquo;</TD></TR><TR><TD CLASS="quote">I always thought the more you boost, the better the chances are for a cracked sleeve (maybe due to heat, the force, etc). I want to hit 300hp but I don't want to be close to the max pt bc my block is not bulletproof. So a cracked sleeve wont happen unless I make extremely huge power or from boosting at hi psi (say 20 -22psi)? I remember reading about hondas being good for around 20psi before needing the block to be sleeved for more boost. Please clarify this, thanks.</TD></TR></TABLE>

Cracked sleeves and internals come from pinging and detonation. If you do not know what these two things are do not turn up the boost, or upgrade your turbo. If you want more power keep the current turbo you have and invest in a stand alone and some tunning time.

drew

 

It doesnt matter what PSI your running to meet your power goal. Its what CFM it takes to get there...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tur*bLu &raquo;</TD></TR><TR><TD CLASS="quote">

Cracked sleeves and internals come from pinging and detonation. If you do not know what these two things are do not turn up the boost, or upgrade your turbo. If you want more power keep the current turbo you have and invest in a stand alone and some tunning time.

drew</TD></TR></TABLE>

aright cool. Ya, I also the hondata s200. I was just concerned about running 2X psi. So is there any disadvantages in running hi boost 22-25psi on stock sleeves if I have my motor tuned properly?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.DC2TurBo &raquo;</TD></TR><TR><TD CLASS="quote">

aright cool. Ya, I also the hondata s200. I was just concerned about running 2X psi. So is there any disadvantages in running hi boost 22-25psi on stock sleeves if I have my motor tuned properly? </TD></TR></TABLE>

I don't think you understand...Most people push stock sleeves to alittle over 400whp (although tuned well they will hold 500+). Asking how much boost you can run on them is meaningless...I don't know much about t3/t4b's but im assuming you will start to be out of its effeciency range before you reach 400whp anyways.

 

I was just wondering about this exact same thing, as I'm in the same boat. I run a t3/t04b on my LS integra motor. The rings are hurtin a bit, and it only made 210whp @ 8.5 psi. (I plan on swapping in a new LS motor soon) I want upper 200 whp and was thinking to upgrading to the SC34, but it seems like the T3/T04b is still efficient atleast until 20psi. 20psi would make something over 300whp, which would destroy my stock motor.

The Honda-Tech logic has taught me that bigger turbo/lower psi = less stress on my motor, but I'm thinking that's wrong. If I tune my Integra to say 250whp on say a t3/t04b vs. an SC34, the t3/t04b would require about 12 psi, and the sc34 would need less, say 10psi. Am I right in saying that the t3/t04b is a better match b/c it is closer to its ideal efficiecy range? Both the motors will subjected to the same amount of power, but the one with the SC34 will be creating more heat since it is farther out of its efficiency range. Honestly, for 250-300whp, should we be going with an even smaller turbo than t3/t4 hybrids?

I'm most concerned with having that level of motor, while I'm putting the least amount of stress on it.

Please correct me if I'm mistaken in any way.

Ethan

 

bump...

 

The T04B will do 300hp and should do it around 14psi I would look into a more efficient turbo though the T04B are not the most efficient things in the world.

 

I am in the same boat also. My motor is about to be built, and I am curious as to what the t3/t04B can do. I think a lot of people underestimate this turbo. They aren't that efficient (I know that much), but nobody can tell me where the efficiency range is OR what the most power people have been making on them (and I have asked a couple times on h-t).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Teg4e &raquo;</TD></TR><TR><TD CLASS="quote">
The Honda-Tech logic has taught me that bigger turbo/lower psi = less stress on my motor, but I'm thinking that's wrong. If I tune my Integra to say 250whp on say a t3/t04b vs. an SC34, the t3/t04b would require about 12 psi, and the sc34 would need less, say 10psi. Am I right in saying that the t3/t04b is a better match b/c it is closer to its ideal efficiecy range? Both the motors will subjected to the same amount of power, but the one with the SC34 will be creating more heat since it is farther out of its efficiency range. Honestly, for 250-300whp, should we be going with an even smaller turbo than t3/t4 hybrids?

I'm most concerned with having that level of motor, while I'm putting the least amount of stress on it.

Please correct me if I'm mistaken in any way.
Ethan</TD></TR></TABLE>

A bigger turbo, less psi = less stress means nothing. Stress on your motor is caused by different things such as detonation, high rpms like 10k, 1000 whp, not psi.

If you are looking for 250-300 whp a straight t3 will suffice. My brother and I are currently laying out a plan for his 90 Prelude Si with the same power goals. The only reason to get a larger turbo is....you guessed it, if you want more power. Before I knew any better (when I bought my turbo kit) I had the same honda-tech-biggest-turbo-you-can-find-way-of-thinking. You obviously know your power goals. Now, where do you want to make that power? If you want low-to-midrange torque than go smaller. If you want to make 300 whp at 8k rpm then go bigger.

If I were you I would get a turbo that is well within it's efficiency range at that power level, has a little room for more hp, and makes the power where you need it. Contact any of the sellers like Arturbo. They know their turbo specs.