DoctorBob

Given these kits offering a "hybrid T3/T4" turbo and such, is there a source for compressor maps for these composite beasts? I realize that when they slap those pieces together, they're making a totally different turbo. What I'm trying to get a handle on is how can I determine which combination (if any) is best for me. Especially since what I'm looking for now (itty bitty training wheel boost so I can get a feel for the system) might not be what I'm looking for later....

If it helps quantify things, I'm not grasping for "quick spool-up time" but I am planning to cap the boost at 7-8 psi to start with, so it makes sense to look for littler turbos. If / when I finally scrape the money together, I plan to focus more on cooling the air than on immediately turning up the boost.

Thanks.

--
DoctorBob

Arturbo

You just use the maps for the T04 compressor.

DoctorBob

Okay, now that I hear someone say it, it seems obvious (it is). The thing is, from looking at those maps, the T04E looks all wrong (at least for my goals). At a pressure ratio of approx. 1.5, even the "54" only hits peak efficiency way out at the tippy top end (about 23 lbs/min), with off-boost performance (around 7 lbs/min) being <U>really</U> off-boost (sub 60% efficiency?).

Ah well, design is work but also fun.

Somewhat off-topic: When busting on our local drag racer with his Sooper Dooper (rusted out) Chevy Nova, I remind him that those of us who don't drag race think about things like speeding up, slowing down, speeding up again, turning that steering wheel thingy in front of you, sometimes even in combination!

Thanks
--
Bob

TurboInteg95

Doctor Bob, take a look at the 60 trim T3 or the Super 60.

DoctorBob

From looking at the turbonetics page, these are exactly the ones I'd picked as my most likely candidates for "My First Forced-Induction."

BTW, the map for the super 60 is unlabeled. Is it measurably better than the 60 because it doesn't look like it.

Thanks.

--
"Wile E. Coyote, Suuuuper Genius."

boosted97

can someone please explain to me the method of correctly reading the maps. Im not sure what the numbers on the side and bottom represent.

archmage

I need to know that as well...The graphs make no sense to me...there are elliptical shapes and then some downward sloping horizontal plots...what the hell??

I must do some research here...

What would be a good ball bearing turbo to run on an Integra GSR if acceleration from 0-60 and 5-60 were most important, and the max boost is at 24PSI ??? (quarter miles being low 12's and high 11's)...street would be around 12-15 PSI with pushing upper limits when I visit the track...

Arturbo

Read the latest issue of Sport Compact Car and they have a pretty good explanation of reading mapps.

art

DoctorBob

Ricehornet and I put together a couple of explanations that are within one standard deviation of not sucking.

]https://honda-tech.com/zerothread?id=57657

Seriously, though, it just comes down to "how much boost do you want to run relative to 14.7 psi absolute pressure (7 psi boost = 1.5 pressure ratio)?" and "how much air can you move through your engine, ranging from about 20-30% max to redline?"

Real data is important here; I get to fudge a bit more since I live at sea level. Hell, a lot of the time, I can <U>see</U> the sea....

Hope this is helpful &gt; zero.

--
"Well! That looks like thermite to me!" -- Bob



[Modified by DoctorBob, 8:38 PM 8/6/2001]

Arturbo

MarkC has made a spread sheet that I think will help out. As soon as I go home I'll post it.

art

TurboInteg95

the 60 trim and the super 60 are very similar. The Super 60 flows a little more air, like the center island is wider then the regular 60 trim. I think the 60 trim is a little bit more efficient at high boost. like maybe one or two more psi.

Arturbo

Here is the link to the spread sheet. http://www.turbomafia.com/Vader/airflow_calc.xls



[Modified by Arturbo, 4:45 PM 8/7/2001]

archmage

Is that spreadsheet basically telling us the amount of corrected airflow for a typical Honda (hopefully B18C1 at 1.8 displacement) at various pressure levels?

THanks a bunch, now I can choose my compressor a little better...I was getting off the wall flow ratings of like 60-90 with RPM's 6000-9000 assuming a 2L displacement (122 Cubic's)...something went wrong in the calculations there...I followed the SCC article I thought, I guess I'll have to take a second look at it.. (or actually more like tenth)

SiRkid

I have NO CLUE how to read those
all i know is i got a ride in a del sol with a b16 and t3/to4e and my butt dyno told me thats the one I should get