choosing a turbo size, question

[teh_mugen18]

I know that guys always talk about choosing the correct turbo size for your horsepower needs, CFMs, spool time, etc. etc. all for driveability and raceability. But, i have a slightly different question about choosing a turbo that doesnt really have much to do with raceability, more like cruiseability. Say, if i wanted to get a turbocharger for a Honda Bseries engine, and loved to go on long road trips, i of course wouldnt want to be at full boost the whole time going down the road. Would that have anything to do with turbo size, like could you choose one that spooled completely after a certain rpms based on cruising rpms of that particular engine/tranny setup or is it easier than that?

[crashtke]

Unless you get one that is much too small, you will not have any issues with it spooling at part throttle rpms. It is a shear matter of the exhaust flow with the throttle body being mostly closed.

As a for instance, on the wrx stock turbo, it is very small from the factory and it will spool a little bit if you get into the throttle in 5th gear while cruising over 70 mph or so or if you go up a big hill. Put on a big turbo and that goes away pretty quickly.

The main determining factor will still be your right foot

[jadakid88]

word

Unless you get one that is much too small, you will not have any issues with it spooling at part throttle rpms. It is a shear matter of the exhaust flow with the throttle body being mostly closed.

As a for instance, on the wrx stock turbo, it is very small from the factory and it will spool a little bit if you get into the throttle in 5th gear while cruising over 70 mph or so or if you go up a big hill. Put on a big turbo and that goes away pretty quickly.

The main determining factor will still be your right foot

[200sxsera]

t3t04 good for race and street driveability

[Slomaro Z28]

Ask Dallasb what turbo he has, I know its a t3/t04....but what trim it is. When I test drove the car it didn't get in boost until 3500ish RPM.

[200sxsera]

most likely 57trim thats what mine is..

[Slomaro Z28]

most likely 57trim thats what mine is..

I figured his was a 57 or 63

[-S Double C-]

sc61 hands down or 60-1 best street turb or if you wanna be a baller gt30r

[DecoyOctopus]

I had a 14b in my crx, i was in 5th going 60 and I would hit boost lol, 2500rpm boost ftl

[ej1boy95]

also just because you are at high rpm's doesnt mean the turbo will spool. the only way the turbo will spool up is if u give it alot of throttle ( depending on size ). so as long as you dont floor it, it wont spool no matter what rpm's you are at.

[Vteckidd]

Boost is dependant upon engine load. Cruising is not putting a lot of load on your engine and won't cause it to spool. You can see a slight increase in pressure but if you stay out of wot the positive boost pressure generated is negligible

T3/t4 is too big for what you want to do. Again like the last thread find a straight t3 super 60 , gt25r or t28 that's your best bet

or supercharge

[ej1boy95]

Boost is dependant upon engine load. Cruising is not putting a lot of load on your engine and won't cause it to spool. You can see a slight increase in pressure but if you stay out of wot the positive boost pressure generated is negligible

T3/t4 is too big for what you want to do. Again like the last thread find a straight t3 super 60 , gt25r or t28 that's your best bet

or supercharge

lol. thats what i was trying to say. thanks. i also have a t3/t4 50 trim and i dont spool that quick. lol

[BAD SS]

Learn how to read compressor maps.

http://turboneticsinc.com/content/compressor-maps

A turbo should be hand picked depending on how much power you're wanting to make and the way the motor is set up.

[Vteckidd]

Learn? You're asking a lot out of these guys lol

seriously though 99% of your questions get answered in other threads, then you post new ones.

RESEARCH try to learn a little on your own before you ask a question that has been answered 900 times.

Check out the forced induction forum on ht there are thousands of setups and graphs to look at

[BAD SS]

Learn? You're asking a lot out of these guys lol

[teh_mugen18]

seriously though 99% of your questions get answered in other threads, then you post new ones.

lol... i posted this thread up, idk HOW many months ago, and i let it die. Someone apparently re-awakened it, and it sure wasnt me... I am going to be taking yor advice though as you posted in the other thread and try supercharging.

[garrick]

Learn how to read compressor maps.

http://turboneticsinc.com/content/compressor-maps

A turbo should be hand picked depending on how much power you're wanting to make and the way the motor is set up.

Just read that an thought its pretty good.

[Vteckidd]

I didn't notice the date I stand corrected

[slowdsm]

the best street turbo for any small motor between 1.6-2.4l is the mitsubishi 16g. if you can get a manifold to run this turbo, you will not be disappointed. it can flow enough air to make a lot more power than it is rated for. although the turbo is rate at about 350hp, people have made 400hp++++. it spool super fast too.

go to turbobygarrett.com and use the instructions to calculate the correct pressure ratio for your engine size and horse power goal. with your result, you can use the compressor map to determine if the turbo is efficient enough for your horse power goal.

when in doubt, get a 16g.

[Kellen]

62-1.....DOWIITTTTTT

[SPOOLIN]

compressor maps don't mean shit unless you know exactly what configuration they were using during the test because all of that changes as soon as you order a different a/r or exhaust wheel plus compressor maps are made using a non real world compressor "dyno" using natural gas.

Billet technology is going to be a very important thing in the future for making big power on smaller turbos, meaning, a 61mm billet turbo will be able to EASILY make 650+.. instead of waiting for lightning to strike. they are already getting upwards or 85-90lbs per minute on a fucking billet 6262 wheel.

You can never calculate ahead of time what your pressure ratio is going to be, you can only do it with on car testing, and then adjust AR housings and wheels to get the ratio you want, which is usually 1:1 for most setups. .8:1 for high compression.

Don't get hard for ball bearing turbos because "they spool faster" because thats not what they are built for and really truly do not spool faster, maybe 100rpm. BB is for DURABILITY, and this is strait from the man that designs the turbos for a very well known turbo producer.