a n00b turbo question(s)...

[Snarlynx]

A car with a smaller turbo tuned to X amount of horsepower will be faster in general than a bigger turbo tuned to X amount also? The faster spool up of the smaller turbo will allow the car to accelerate faster right?

so say my power goal is 325WHP (which it is). Should I get a turbo rated for 350 HP or for 400HP? Is the HP rating flywheel or at the wheels? Also how accurate is the average rating? Say I got the one rated at 350.. could I run at 325HP all day long with no side effects (assuming there is no other bottleneck?)

Sorry for all the questions but I'm getting my car Saturday and I'm planing out my mods right now.

[I H8 UR DSM]

A car with a smaller turbo tuned to X amount of horsepower will be faster in general than a bigger turbo tuned to X amount also? The faster spool up of the smaller turbo will allow the car to accelerate faster right?

no. faster in the 1/4 mile maybe, but do a 1/2 mile run, a car with the larger turbo will obviously produce more power (in theory, and if tuned correctly).....i think thats what you mean, but im kind of confused by the question...

if your asking if your goal is to have 350 hp, if you would be better off with a smaller gt2835 vs. a larger T88? yes, you would have no reason to have a turbo that large, and you'd be better off with the smaller turbo....you want a turbo for your goal

[Snarlynx]

No. How do I rephrase this....um..... say that the boost is higher in the smaller turbo then the bigger turbo. and the result is that they both put down 250hp to the wheels. will the smaller turbo accelerate faster in this situation? I think you kinda said it would... To sum up... you think that it would be best to buy the smallest turbo possible for the power I want to make?

I hope that makes more sense.

[I H8 UR DSM]

yes....in theory.....

some people (like my self) dont mind the lag....and it depends on what kinda setup you want IE, drag vs. autocross, vs. street....

but what your asking seems like you want MINIMUM lag, so you would want the smaller turbo, it will spool faster, and therefore reach full boost faster, so it will feel faster, might not put out more power, or be faster in the end, but it will accel faster at low rpm, since it has less turbo lag : )

[lucky]

The smaller turbo would spool faster and thus it would accelerate faster. Like I H8 said, there is no reason to have a turbo rated for 600+ HP if you only want 350 HP.

[Snarlynx]

Thank you guys.

two more questions:1) ball bearing vs. non ball bearing. +'s and -'s?

2)which one would you guys reccomend for the best all around (street, drag and auto-x) turbo rated to 350hp?

P.S. Have you started the s13 project yet lucky? I imaginge it might take a while because if I was starting up a project like that I'd search for the lowest milage, best taken of car in the country. literally.

[I H8 UR DSM]

ball bearing will spool faster (supposedly up to 300rpm faster to full spool)...ball bearing turbo's cant easily be rebuilt (they can but its a lot of money afaik).....

hks ball bearing 2835

[Dori Dori]

Smaller turbos don't accelerate any 'faster'. There are too many variables to say that. I mean, obviously a T-88 will spool slow and the lag would be immense, but it's boost would be much, much more efficiant than that of a T25.

My suggestion to you would be to eithera: Learn more about turbos so you can pick and choose yourself.

b: Have a pro do it for you.

I am looking for 350whp w/ a low boost threshold and as little turbo lag as possible as well. I may go with the enjuku kit, but I will be selecting my own trims (a lower a/r=quicker spool). I won't put down 400whp like they did, so my top end will suffer, but my boost will come quicker. Throttle response will be better as well. Or if you've got lot's of money, get an HKS GT3037 w/ custom manifold. I will envy you if you do.

[lucky]

P.S. Have you started the s13 project yet lucky? I imaginge it might take a while because if I was starting up a project like that I'd search for the lowest milage, best taken of car in the country. literally.

I haven't started yet...I've been really busy lately with the holidays, work etc....Plus I'm still waiting on someone to buy my current car. I'll probably be more motivated to sell it after New Years when things slow down.

[-Spool-]

A t3 turbo spools quickly but cannot handle a lot of boostA t04 turbo spools slower, but can handle a lot more boost

And this is where hybrid turbos come in...

for example... a T3/T04... The turbo has the smaller T3 Intake for faster spool up times, with a t04 for higher boost levels...

The result... a turbo that spools quickly, and can handle a lot of boost.

Start researching on some hybrid turbos that have worked well for people.... the T3/T04E seems to be a popular choice among many of the SR20DET crowd, this is the same turbo used in the Enjuku Kit I believe.

I'm new to all the custom turbos as well, so dont quote me on any of that

[I H8 UR DSM]

well then you come into A/R....a A/R of .63 is going to spool faster than a turbo with a .93 A/R, even though they are both T3/t4's...

[lucky]

well then you come into A/R....a A/R of .63 is going to spool faster than a turbo with a .93 A/R, even though they are both T3/t4's...

But the smaller the A/R the less power you will make. I say just do what some of the local mullet heads (I do live in TX so there are plenty of them) suggest...get the biggest turbo you can find and spray the hell out of it. You pretty much don't have to worry about lag after that :ylsuper

[Dori Dori]

Or just get an anti lag system installed (if you're an Initial D addict, they refer to it as a misfiring system). You'll need a standalone for that though.

You'll have to replace your turbo and exhaust parts quite frequently if you use it too much though.:devil