WhiteEJCoupe

im stuck on these 2 turbos for my K20. its a daily driven grocery getter, take to the track once a month. My goal is 400whp at not too high of boost (10-12psi). just wondering what are the spool times for these 2 turbos. is the 5857 spool a lot quicker then a 6262? should i just get the 6262 and call it a day? just want some feedback with people who have these turbos...

cloviskilla

iTrader: (2)

6262 no doubt

tmar253

iTrader: (3)

x2

turbo gsr2000

x10

Axix24

go with a gt30r.... will spool faster than the 6262 and be alot more efficient around 400whp...

AlexDphoto

precisions billet 5857 is rated at 500whp and will definitely spool faster than the 6262. If youre looking to use this for your daily driver and only want 400whp, the 5857 will get the job done for you.

My local shop Full Blown Motorsports highly recommended this turbo for me, and I got to check it out in person when I went to talk to them. One of their employees is actually using this turbo on his VW rabbit build.

WhiteEJCoupe

good to know. you think it will get the job done at low boost though? i have a k20z3, 12.5CR in my 2008 Civic Si. i cant really push the car over 12psi until i lower my compression. also anybody know the spool differences between both?

AlexDphoto

Dont let the deciding factor be psi. Psi really isnt the issue here, the CR of your car however might be. Your best bet would be to put a thicker head gasket on and get a really good conservative tune. And if you have E85 in your area, you could consider running that as well.

WhiteEJCoupe

so your saying a 5857 pushing 14psi to make 400whp isnt going to put more stress on a motor then a 6262 pushing 8psi to make 400whp?

AlexDphoto

Im saying the 5857 will suit your goals better. Youll just end up having to turn the boost up a bit more, and that isnt necessarily bad. the 5857 however wont reach the numbers the 6262 will, but if youre not looking to make high HP numbers then theres really no need for it.

You wont be pushing the capabilities of the 5857 for 400hp, which is an easily attainable number for K20's

cloviskilla

iTrader: (2)

not to mention less efficient on you wallet. i would go 6262 or 5857 billet if pte is making them now.

AlexDphoto

If i recall right, the PTE billet series are about 850 dollars, while the gt3076 is about 1200. Definitely a big price difference there.

90blackcrx

Yep you are correct, and you are also correct about the other statement. Why go with a 6262 when the 5857 can reach your goals just fine, and is smaller so it will spool a little quicker.

WhiteEJCoupe

car is basically a grocery getter/get me to work car. i bring it to the track like twice a year. mostly just cruise on the street, maybe a little light to light action. our chassis (8th gen civic si's) right now are have transmission issues with cars making ~500whp, hence why i want to stay in the 400whp range. BUT once something drops to fix our transmissions i would want to shoot for 500whp.

spoolin turbo s

if all things are equal say both turbos make the same tq and power at 7psi Vs.30psi

it will be the same amount of stress on the engine

remember boost is just the amount of "pressure" the turbo is making not the "volume" of air it is putting in the engine

think of it this way the small turbo is a straw and the bigger turbo is a 3 inch pipe, if you blow through them the bigger one is going to allow for alot more air than the smaller one at the same pressure

you get what im saying?

AlexDphoto

well youre saying you want to make 400 here, and then 500 here. make up your mind and tell us the end result of your goal, otherwise youre only going to be wasting your own time and money.

If 500whp is the goal for your car, then you may want to reconsider the type of turbo you want to use. K series trannys already have transmission issues to begin with so building for 500hp may come sooner than you think

you also might want to let us know if you want to make 500 on pump, e85, or race gas.

DelSolMarine

I will tell you for a fact... you will hit 400whp and you will want 500whp... when you hit 500whp you will want 600whp.

get the 6262 and call it a day. its the best bang for the buck turbo on the market and you will not have a worry about if you made the right choice with your money...

WhiteEJCoupe

i have a Bone Stock K20z3 right now. I have a Precision 5252E on the car right now that made 462whp at 14psi on 93 pump. things were going great and then i blew the oil seal on the turbo. heavy smoking and oil dripping out the turbine bolts. so now im in the market for a new turbo. RIGHT NOW i dont want anymore power then that. people are poping transmissions left and right with 500whp or more on our chassis/engines and i do not have the money for a new transmission nor upgraded gears, so 400whp is where i would like to stay. In a year from now or so, when i have the money and if i still have the car, i would like to build the transmission and shoot for 500whp on pump gas, stock motor k20z3.

again this car is driven daily as a get me to work/grocery getter. i dont really track the car nor want to. just like to have the power if and when I want it. its sweet to say you have a 500whp stock motor 4 door civic...

so theres the scenario....

AlexDphoto

The si in your picture would have a k20Z1 wouldnt it?

WhiteEJCoupe

2008 Civic Si K20z3, siiickkk

30psi_gst

Get the 5857. It should meet your goals just fine. Probably will make 400whp on 8-10psi without much trouble really.

To who said a 30r will spool faster. No it will not. We just put one on a friends SRT. 3076r full boost at 3800, pump and meth. Billet 5857, full boost at 3600 on just pump gas. Meth kit wasnt working so had to run nearly no timing. Both .63 housings. Gonna get the meth working and get it back on the dyno and run more timing. Considering the size of the 2, the differences in compressor housings. Id say the 5857 spooling 200 rpms faster then the 30r is quite drastic.

cloviskilla

iTrader: (2)

1000 percent agree

gizzmo222

6262 FTW, they make great power and spool very well.

boostedBLUfg2

get the 5857. can't believe people are recommending the 6262 for a DD with what he wants. i drove in a 6262 as i was thinking about that one, and the lag was a huge turn-off. 5857 ftw

eg:R

There's alway talk about how good these billet turbo are but I don't ever see too much good post about it.. I would go with the gt30r or gt35r with more room to grow later if u get power happy