ok ok. i did a quick search and couldn't really find what i was looking for. here's what i have learned.

boost means nothing. how much cfm's a turbo flows does.

here's my question(s)..... on a DD b16, what turbo would be ideal for a very versatile power range? i found some guys running DSM 18g's turbos and some garrett gt25's and gt28's that are said to spool quick. what parts are out there that are proven reliable? what are you guys running and are you happy? what would you have done differently? dyno sheets are welcome.

and if this has been asked a million times and you hate me now..... sorry. post a link up.

i'm interested in cam preferences, intake manifolds, exhaust manifold (log and mini-ram), and brands and pricings also if you would be so kind to share your knowledge.

 

Well. "Boost" in the context of pressure differential is still important to consider and understand. It may be useless to compare 10 PSI of a Corvette engine to 10 PSI of a Civic engine or even 10 PSI on the same engine but different turbos, but it is important to why those numbers mean different things. Especially say in something like a roots supercharger where your CFM limit may be quite high, but the pressure differential (aka boost) is going to be very limiting for practical purposes.

And if you ever get far enough to read turbo maps, your definently going to need to understand the relationship between pressure and flow.

Also smaller turbo's do have great spool up times. But that can also mean that they overshoot their boost target at first and can put quite a strain on your clutch and engine. Where as a larger turbo takes a little longer to spool, but is much more controlled when first getting on it.

 

Still wanting your hand held? Maybe name a horsepower goal AT LEAST and maybe we can help you. I already told you to look at other people's build threads to give you some idea of what you're looking for.

"what turbo would be ideal for a very versatile power range?" What does this even mean?

 

^^^ You need to give a power goal. And what is a versatile power range? A small turbo will have quick spool and good mid range power but will die up top. Remember boost is intake backpressure and a small turbo cant keep up. Learn to read a compressor map

 

Turbo Tech 101
http://www.turbobygarrett.com/turbob...o_tech101.html

 

lulz. research. do more.

 

so the ctr cams and newer itr cams are the same and the best factory option. it seems like a lot of people run these.

also, itr manifold and skunk manifolds are same? seems to be better for lower end power. the edelbrock victor x is better for higher end but loses in the lower end.

the t3t4 50 trim with a .48 turbine side i guess spools really quick but will fall off in the upper rpm's and creates a lot more heat that needs a timing change to deal with. so the next step up is the t3t4 50 trim with 63 turbine side? or is there something in between?

 

i may have seen a .57 turbine side but i cant tell if they're referring to a different turbo or not....?

and SLS mini ram exhaust manifold? any other good options?

am i on the right track? i'm trying guys lol

 

You're NOT on the right track. You're doing it ***-backwards. You MUST start with a horsepower goal. Hell, ANY goal at this point. If you don't even have a GOAL to work towards then you're just flailing about in the dark and wasting a lot of time.

 

for a non ball bearing option the t3/t4 50 trim with the .63 A/R and stage 3 wheel is a tried and true unit. both the b16 and b18c seem to do really well with one of these. when i was looking over turbos for the b18c unless i went ballbearing the best cost to benefit ratio i found was the precision 5031e. i finally ordered one only to learn that it's out of production and was replaced with the 5431b which i now have. i paid $559 shipped from e motors which was the best bang for the buck that i had found

of course this is based around a 250-375whp goal

if you want more than this you should be stepping up

 

thanks a lot! i wouldn't need to go higher than that. what are the differences between the staged wheels of the t3/t4 50? and whats the story behind the 5431b? is it comparable to the t3/t4? probably preference but which one is better?

 

short answer is: The exducer diameter is supposed to be a major restriction on the stock T3 housing at higher flow rates. That is the major benefit of the Stage III turbine section... it has a larger exducer diameter which permits more flow.

there is virually no difference according to precision with the 5031e and 5431b

both use a stage 3 wheel and come in a .63 ar. the 5431 has a smaller inlet and outlet at 2-5/8" and 1-3/4" vs 3" and 2" of the 5031e but the 5431b has an 8 bladed compressor wheel and actually flows more air than the 5031e and it's 6 bladed wheel. the actual rates are 46lb/min for the 5031e and 48lb/min for the 5431b

both of these are t3/t4 hybrids

 

cool beans, man! so the t3/t4 50 trim with a .63 ar is a 5431b???? if there's a slight difference, i'd take whichever spools faster. probably not a whole lot of difference though.

 

the difference is one is dated and one was recently released. the 5431b is the replacement for the 5031e
.

 

how much power are you wantting to make? you should really set a power goal. if you do that people will be able to help you out alot more rather then guess on what you want.

 

he kind of did saying he wouldn't need to go higher than 350whp

 

true but a set number would make things a little easier. not trying to be an *** or nothing just want to help him get where he wants to be

 

He never says because he doesn't know. He won't even tell you what his budget is. Before he was talking about 400hp but had no clue if it was streetable so he just picked a lower number. Chances are the OP has never even driven a front wheel drive car with this kind of output. So even if he says 350 he has no idea why he wants 350.

 

the most powerful fwd i've driven was the RSX typeS i owned for awhile. i ended up falling out of love with the thing cuz i got too cozy in a chipped Genesis Coupe 3.8 track making somewhere north of 350hp. i sold the Acura to pay off a college loan so now i'm down a 200/ month college loan, a 200/ month auto loan, and my auto insurance was cut in half. i'm not going to blow all my freed up money on a car but i will build it how i want in time.

i can think of a few high dollar items that i'd like to avoid like sleeving the block and head porting. if you read this page, i've put some parts up i'd like, most being better honda options. i'd like to rely a lil more on common sense in this build.... i'm not gonna put a 500 dollar turbo on a 2000 dollar manifold and i want something thats actually streetable.

cant remember who but it was suggested to start small and build power as you want instead of building some undriveable monster..... so no, i don't have a power goal. i think if you're going to go to the trouble of turbocharging an engine swapped honda you might as well make at least 300hp to start. then there's other yahoo's who say their 600hp civic hatch is perfectly streetable lol. yeah right. i don't want to go that high. i feel that i've stated my budget and goals a few different times.

sooner or later the bottom end will be opened up for rods/pistons but until then i want the thing up and running. if i decide to aim for another 25-75 hp i don't want to have to replace everything i've already done.

 

racebum, thanks for the turbo info. what exhaust manifold are you running? what would you recommend?

 

If you think you're going to find one single turbo that is going to be able to cover some broad power range you're mistaken. Start small and build power as you want makes no sense.

Good luck with your pipe dream.

 

manifolds are just as complicated as picking the correct turbo. in fact you have to answer the next 3 questions before i can even venture ideas

1. do you want to keep power steering
2. do you want to keep ac
3. do you want to be able to use a full size radiator
4. what's more important, reliability against cracking or all out hp?

 

that's 4 questions btw

1. yes
2. yes
3. yes
4. reliability

mini-ram please

 

http://www.spoolinperformance.com/bs...old-p-457.html

i love this sight lmao!

 

absolutely the best low cost option based on what you said.

if you spend more there is a better cast manifold though

http://www.inlinepro.com/s1/p-91-inl...-manifold.aspx

cast version is $375