PuRtY...



[Modified by Vadian, 4:00 AM 8/2/2002]

 

damn, wish mine would come in

 

I want to show your block my "O" face.

Ohh ohh ohh ohh!

 

Looks Puurtty

I hope my spare block that I will have GE Sleeve will look that nice too

 

It took like 2 months to get it tho... supposively the first set of sleeves they put in failed their 65psi test. Well, at least its finally here and done. The bad part was cleaning their "glue" at the bottom of the sleeves. It was super sticky and my hands got all cut up around the underside of the block. Real sharp corners.

Just need to figure out the turbo setup now. That block plans on seeing 20psi of boost. Anyone have a recommendation on a turbo for this one? Its 2020cc and I'd like to be around the 400hp range. Been tryin to figure out compressor maps and so far it seems that the Turbonetics 60-1 compressor trim looks best for me, 62-1 doesn't look too bad either. But I'll have to redo them again.

Thanks guys!

 

Niiiiiiicccccccccceeeeee. I should be seeing mine soon.

About the turbo setup, depends what car you drive? Don't want something too big b/c you'll be at the line waiting for it to spool up.

 

do a search on those turbos......you can get over 400+ with good spool on a medium T3/T4 at higher boost or over 500hp on a 60-1...

Ben

 

Just a few questions for you because I'm thinking of doing the same thing...

What size bore did you go with?
What block did you use (B18C)?
Will GE also install pistons and rods?

Thanks

 

I saw it on club Si, nice

 

Do it right.... for the turbo... talk to Vaportrail (John) about his GT30 turbo. A little more expenseive than the "normal" turbo, but well worth it...!!

 

a little more expensive, or do you mean about double? lol
Hey, get me a GT30 for just a little more than a "normal" turbo please.

 

Double? How about TRIPLE the price? They do look damn good though, and I bet they outperform a Turbonetics easily.

 

was trying to be nice but you said it.

 

RedTeg95

I went with a 85mm bore for 2020cc's of displacement using an LS block. As for them installing pistons and rods, I really don't know, sorry. Just send them an email or give them a call.

 

Yeah hehe, I've read the posts on the GT30 and the others. Man, they are expensive but hec, I spent this much on preparation, why not keep goin for the best regardless of price, hehe. (Goodbye social life).

 

Sources

http://www.badbricks.com/main_files/faqs/turbo_size.htm
http://64.225.76.178/catalog/compmaps/fig1.html
https://honda-tech.com/zerothread?id=98528

So, anyone want to confirm my compressor mapping skills? I am fairly confused on the whole process but here's a pic of my attempt of plotting my motor on the Turbonetics 62-1 Compressor Trim. (Got the map from their site).



I plotted 3 lines on one map for different boosts. Red for 14psi, Blue for 17psi, and Black for 20psi.

Now, according to my sources (listed top) I was to plot 3 points, each a different rpm. 100%, 75%, and 50% of your intended redline; As for mine, 8400, 6300, and 4200 respectively. I'm guessing this is to anticipate full boost at approx. those rpms?

Anywho...each dot I made on the map, from left to middle to right (4200, 6300, 8400 respectively), corresponds to the point that my flow rate at that RPM and the Pressure Ratio at that amount of boost intersects on the graph.

Now it has come to my understanding that you want to be in the highest effeciency level without crossing the surge limit line and spinning the turbo too fast, like 120,500rpms according to the map. It seems that at 8400rpm, the turbo is in a pretty nice efficiency range at all 3 levels of boost, especially at 14psi. This is all with the assumption that I graphed this right.

Now I've seen some people look at a map and determine whether or not if it makes for a good spool , approx. this much HP, etc... How do you determine it?

If anyone cares, here are my calcs for my motor (2020cc).

<U>Point 1 (8400RPM)</U>
Flowrate at 14psi: 549.98844 CFM or 38.674087 LB/MIN
Flowrate at 17psi: 607.47851 CFM or 42.716678 LB/MIN
Flowrate at 20psi: 664.96802 CFM or 46.759221 LB/MIN

<U>Point 2 (6300RPM)</U>
Flowrate at 14psi: 412.49133 CFM or 29.005565 LB/MIN
Flowrate at 17psi: 455.60888 CFM or 32.037505 LB/MIN
Flowrate at 20psi: 498.72601 CFM or 35.069416 LB/MIN

<U>Point 3 (4200RPM)</U>
Flowrate at 14psi: 274.99421 CFM or 19.337043 LB/MIN
Flowrate at 17psi: 303.73925 CFM or 21.358337 LB/MIN
Flowrate at 20psi: 332.484 CFM or 23.37961 LB/MIN

<U>IDLE Flowrates</U>
14psi: 109.99769 CFM or 7.7348176 LB/MIN
17psi: 121.4957 CFM or 8.5433346 LB/MIN
20psi: 132.9936 CFM or 9.351844 LB/MIN

<U>Pressure Ratio</U>
14psi: 1.952381
17psi: 2.1564626
20psi: 2.3605422


Heh, if anyone cared to read all that, thanks for your time! Just tryin to learn...and thanks for the help!



[Modified by Vadian, 3:59 AM 8/2/2002]

 

pretty

 

nice and shiney

 

Looking at your map I would say that is the wrong turbo for your application. You should have the low boost setting going through the lower part of the highest efficeincy and the highest boost going through the highest part of the efficeincy bubble. Your 14psi setting barely catches the 78% effciency region and your high boost setting is entirely outside the maximum efficeincy region.

Look for a turbo with a higher efficeincy in your boost region.

Good plotting though.

Randy

 

Thanks for the help!

But its different at each boost and each rpm point. What I am not understanding is what part of the line needs to be in the max efficiency range? At 14psi at 4200 is isn't even close to the maximum efficiency range but at 8400rpm, it is. Should you be more concerned with a specific point or what in regards to efficiency? Looking at all the graphs I've done using most of Turbonetics' compressor maps, no graph of mine is completely in the highest efficiency range. Moreover, there are some that are in the dead center of 76% efficiency, but this is at 4200rpm....at 8400rpm its off the chart to the far right. I'm guessing that means it'll spool up fantastic, but die off at top and probably be overspun (too many rpms, too small of a turbo).

Confusing I tell yah, heh.

Thanks!


[Modified by Vadian, 3:43 AM 8/3/2002]

 

Anyone else help clarify this for me?

Thanks!

 

Buy them from sources in Australia. Even by the time it's shipped a GT35R is under $1600. GT30's are under $1400. Do it once, do it right.

jeff