Calebp

iTrader: (1)

Hey guys in new to the form but I got a wide body eg with a h22a with sleeves 8:5:1 wiseco piston eagle rods arp head and main studs and found a precision 6265 at a good price would that be to big for my motor what would y'all Recommend something not crazy Costly thanks

TheShodan

iTrader: (14)

No one can read minds. We don't know your power level goals, and what you're using the car for. But I will say, Big Turbo + Low boost = bad powerband, but makes a peak number on a dyno.. which still = bad powerband.

Gentleman, please be complete when it comes to your questions. Your version of "not crazy" is not the same as someone else's.

Calebp

iTrader: (1)

Shooting mid 400s just a weekend ride and play toy mostly ima run 15psi

TheShodan

iTrader: (14)

Yes. that would be a HUGE overkill for that engine for those power levels, regardless of the "deal". Get something MUCH smaller. in the 52lbs/min-60lbs/min range. In a T3 format.

Calebp

iTrader: (1)

Thanks man I thought that might be too much what would your pic be brand size ect

nealnanoHX

Garrett T3/T4 60 trim would work well and not be "cray". Even a T3 60 would be ok but a little laggy compared to the T3/T4.

ESP.net

H22 8.5-1 6265 @ 15 psi 450-500 whp 350 ft lbs torque...

I am going with 6266 T4 H23V 550 whp pump/meth street car...

Shouldn't be too crazy for the street.... seems to be a good choice for the H is the 62 series... 6262 might be better choice...

TheShodan

iTrader: (14)

You'd think that, right? But over the years of working with turbos on B/D/H/K platforms more than ever MANY Hondas getting killed by much smaller units in comparison. The acceleration rate that comes in all 4 gears takes these 6262 guys the 1st few hundred meters every time.

What people fail to realize is that regardless of whether or not its 15 or 18psi, boost pressure, is boost pressure, and the engine either has the ability to handle the increased cylinder pressures or it doesn't. The question is HOW that power is delivered.

ESP.net made a perfect example. A nice dyno of a peak power number in one gear of 450whp at a lower boost pressure outside of the 6262's efficiency level of 18-31psi of boost pressure. Sounds good, right?

Now take something like NealnanoHX's example, with something a bit smaller. Now, the T3/T04E 60 trim will have difficulty after about 440whp just in exhaust wheel energy (about 21-22psi by the time it does that due to the smaller exhaust wheel), but say something slightly above that at 60lbs/min instead.. Same power, perhaps 3-5psi more boost pressure , same torque. But this time, WELL within its efficiency range for recovery. Because of the smaller compressor wheel, and the better fitment for his purpose, he has faster recovery in between gears than something as large as a 62mm..

So as each car goes at it on the street, the smaller turbo will have a better acceleration rate and recover faster in each gear than a larger turbo at a lower boost pressure. The smaller turbo will easily take out that larger turbo H22, because he has better powerband and will get that peak torque sooner in the range from 3800-8000, than the larger turbo that only gets it peak power from 5000-8000. More usability, better control.. Same power.

Peak power on a dyno means nothing in one gear, if the big picture isn't taken into account. (Acceleration rate, testing with multiple gearing instead of one "snapshot" of 4th gear, etc).

Now don't get me wrong, I'm not saying to go too small like a GT28XX series or anything like that, as it would have torque, but only in the lower powerband. The 450whp goal wouldn't be reached and the powerband would be really short. Something in the 53lbs/min to 60lbs/min as I said earlier would work.

I'd take a loss of a few peak power ponies over a much better overall torqueband any day. I know people look at other platforms as apples to oranges, but if you look closely, the Evolutions, Subarus, 3S-GTE Toyotas and DSMs, do it much better, with more weight (AWD accounted for of course) a smaller displacement engine, and smaller turbo than what most H22s on this forum use.

This "bigger is always better" mentality bites more street/strip car people in the *** than ever before. THINK DIFFERENTLY.

nealnanoHX

There is a reason the T3T4 turbos are so popular. Thanks for using my post as a ref Mac, I got all giddy LOL.