HELP Me Choose a Turbo Please...
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From: LaWtowN, Ma, usa
HELP Me Choose a Turbo Please...
hey all, im trying to decied on what turbo to choose,and frankly im just not sure so please help and give me your opinions..94 eg coupe, plan is to be a street/strip car with a power goal between 600-650 ...i want a turbo that spools quickly and pulls till redline,and not die out at higher rpm's ... i was thinking of either a gt35r or a gt40r.....i know the 35r spools quickly but how are they top end? 40r spool quick??or is there another turbo out there that will do what im looking for..please help..o btw its a ls/vtec
Modified by KillAHonDa at 11:36 AM 2/18/2008
Modified by KillAHonDa at 11:36 AM 2/18/2008
Re: HELP Me Choose a Turbo Please... (KillAHonDa)
You're asking for a lot out of your engine displacement and power level for one turbo to do that. The fact is, you can't beat physics, so "fast spooling" ,and "Big power", have no business in the same sentence. Especially for anything under 3 litres.
That being said, as many turbo gurus have stated on here, you need to be a bit more specific in terms of what you're looking out of a turbo in order for the car to do a bit more what you want. Understanding the PURPOSE of the car is key, though I have a feeling you're going to say, "I plan on doing this mainly on the street, w/ occasional weekends at the track, and want to break a 10 sec E.T." (Please prove me wrong..
). I'm not saying at all that it is not possible, because it is, but you may need to understand about the positives and negatives regarding a FWD honda (yes, even w/ LSD) on the street vs. the drag strip. Unfortunately, in order for your goal to be a bit more realistic, one use may have to override the other. More street, or more strip, pick one.
Ok. Now that you've made that decision, now let's look at the setup you plan to use. Its more than likely you're on some sort of VTEC B-series engine, but you may be on a Non-VTEC or K-series engine. We don't know, so you'll have to enlighten us w/ your story. (But keep it simple). Actual displacement, Static compression, max rpm, and even cams all play into understanding the needs you're looking for ...
Alright, done.. you've stated the internals and technical blah blah.. Now, let's look at the turbo. What budget are you looking at? Be aware, if you want 600+ HP, plan for over $1100-$1500. (Yes, people have sales on stuff all the time, so no one get their panties in a bunch as to how much they paid for something, these are simply average costs for the larger units). Many people out here throw up suggestions without reasoning, with a big THUMBS UP, but honestly, who knows what you want better than yourself? There are plenty of dynos, charts, maps, and other empirical information than you can shake a stick at, so start searching around, and asking the turbo and tuning gurus around here.
Budget stated, great. Only one thing left. Fitment. Are you trying to do T3 flanged, or T4?. Bottom mount, or top mount exhaust manifold? Twin scroll? Divided inlet? V-Band? 3"downpipe? 4" downpipe? Ball-bearing cartridge? Journal bearing cartridge? Do you even know yet? This is where once again your information about the setup is going to impact that budget that you were looking for. Understanding the differences b/w journal bearing and ball-bearing (other than "spool") is going to be important, because face it.. At under 2.5 litres, you've got to spin the motor, to move the turbo. For 600whp+ "quick spool" is out of the question whichever cartridge you choose. Deal with it.. plain and simple. But that doesn't mean "lag" is a bad thing necessarily. Most of the larger units reach maximum pressure by about 4600-5500rpms, (once again, average, no need to post what everyone else's did
) depending upon what you choose. Ball-bearing cartridge can work, but if it breaks, and you don't have the budget for the water lines, bye bye turbo, hello $1300+ paperweight, because on most damage, it cannot be rebuilt, and its costly. Journal bearing cartridges can work as well, especially with the newer designs of compressor wheels, and can be rebuilt, because if you want to go fast, you're gonna break something eventually. Garrett & Borg-Warner are the main ones that can foot the bill, each with their advantages and disadvantages.
Welp, there you have it in a proverbial "nutshell". Unfortunately, we can't read minds, so don't expect us to, and H-Ters have a tendency to not spoon-feed, you you've got some work to do, and some questions to answer before we can help further.
Sorry for the Soapbox speech, but in the last month, I've seen this question asked WAY TOO MANY TIMES. I hope that this becomes a "sticky", because it is needed, seriously.
Good luck, and feel free to PM me w/ specific questions.
Modified by TheShodan at 6:00 PM 2/18/2008
That being said, as many turbo gurus have stated on here, you need to be a bit more specific in terms of what you're looking out of a turbo in order for the car to do a bit more what you want. Understanding the PURPOSE of the car is key, though I have a feeling you're going to say, "I plan on doing this mainly on the street, w/ occasional weekends at the track, and want to break a 10 sec E.T." (Please prove me wrong..
). I'm not saying at all that it is not possible, because it is, but you may need to understand about the positives and negatives regarding a FWD honda (yes, even w/ LSD) on the street vs. the drag strip. Unfortunately, in order for your goal to be a bit more realistic, one use may have to override the other. More street, or more strip, pick one.Ok. Now that you've made that decision, now let's look at the setup you plan to use. Its more than likely you're on some sort of VTEC B-series engine, but you may be on a Non-VTEC or K-series engine. We don't know, so you'll have to enlighten us w/ your story. (But keep it simple). Actual displacement, Static compression, max rpm, and even cams all play into understanding the needs you're looking for ...
Alright, done.. you've stated the internals and technical blah blah.. Now, let's look at the turbo. What budget are you looking at? Be aware, if you want 600+ HP, plan for over $1100-$1500. (Yes, people have sales on stuff all the time, so no one get their panties in a bunch as to how much they paid for something, these are simply average costs for the larger units). Many people out here throw up suggestions without reasoning, with a big THUMBS UP, but honestly, who knows what you want better than yourself? There are plenty of dynos, charts, maps, and other empirical information than you can shake a stick at, so start searching around, and asking the turbo and tuning gurus around here.
Budget stated, great. Only one thing left. Fitment. Are you trying to do T3 flanged, or T4?. Bottom mount, or top mount exhaust manifold? Twin scroll? Divided inlet? V-Band? 3"downpipe? 4" downpipe? Ball-bearing cartridge? Journal bearing cartridge? Do you even know yet? This is where once again your information about the setup is going to impact that budget that you were looking for. Understanding the differences b/w journal bearing and ball-bearing (other than "spool") is going to be important, because face it.. At under 2.5 litres, you've got to spin the motor, to move the turbo. For 600whp+ "quick spool" is out of the question whichever cartridge you choose. Deal with it.. plain and simple. But that doesn't mean "lag" is a bad thing necessarily. Most of the larger units reach maximum pressure by about 4600-5500rpms, (once again, average, no need to post what everyone else's did
) depending upon what you choose. Ball-bearing cartridge can work, but if it breaks, and you don't have the budget for the water lines, bye bye turbo, hello $1300+ paperweight, because on most damage, it cannot be rebuilt, and its costly. Journal bearing cartridges can work as well, especially with the newer designs of compressor wheels, and can be rebuilt, because if you want to go fast, you're gonna break something eventually. Garrett & Borg-Warner are the main ones that can foot the bill, each with their advantages and disadvantages.Welp, there you have it in a proverbial "nutshell". Unfortunately, we can't read minds, so don't expect us to, and H-Ters have a tendency to not spoon-feed, you you've got some work to do, and some questions to answer before we can help further.
Sorry for the Soapbox speech, but in the last month, I've seen this question asked WAY TOO MANY TIMES. I hope that this becomes a "sticky", because it is needed, seriously.
Good luck, and feel free to PM me w/ specific questions.
Modified by TheShodan at 6:00 PM 2/18/2008
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Joined: Apr 2003
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From: PinaColadaBurgh, Id, USA
Re: HELP Me Choose a Turbo Please... (TheShodan)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheShodan »</TD></TR><TR><TD CLASS="quote">Sorry for the Soapbox speech, but in the last month, I've seen this question asked WAY TOO MANY TIMES. I hope that this becomes a "sticky", because it is needed, seriously.</TD></TR></TABLE>
Hooray! Thank you for saying what so many of us others wanted to. I think this post should come up when anybody hits the 'New Thread' button.
Hooray! Thank you for saying what so many of us others wanted to. I think this post should come up when anybody hits the 'New Thread' button.
Re: HELP Me Choose a Turbo Please... (scrcco)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scrcco »</TD></TR><TR><TD CLASS="quote">Go with a GT35R and a larger AR turbine housing, possibly a divided housing to aid spool</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by theshodan »</TD></TR><TR><TD CLASS="quote"> Many people out here throw up suggestions without reasoning, with a big THUMBS UP,</TD></TR></TABLE>
This is exactly the problem I'm referring to :
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by theshodan »</TD></TR><TR><TD CLASS="quote"> Many people out here throw up suggestions without reasoning, with a big THUMBS UP,</TD></TR></TABLE>
This is exactly the problem I'm referring to :
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Man U FTW
Joined: Sep 2005
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From: Phoenix, AZ
Re: HELP Me Choose a Turbo Please... (TheShodan)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheShodan »</TD></TR><TR><TD CLASS="quote">
This is exactly the problem I'm referring to</TD></TR></TABLE>
Mac...you're fighting an uphill battle against the legions of idiots. I like that you keep trying though
Great post above
This is exactly the problem I'm referring to</TD></TR></TABLE>
Mac...you're fighting an uphill battle against the legions of idiots. I like that you keep trying though
Great post above
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