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Old 02-21-2013, 07:44 PM   #41
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that's not how they work.
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Old 02-25-2013, 06:44 PM   #42
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Well, reporting back now that I have the 4828 installed.

This is just butt dyno results on something that is extremely conservatively and safely tuned (Read: Basically completely untuned, on basemap), but even as is it reminds me a LOT of my old SR20 T25 turbo, as opposed to my ch..ch..churbo.

Boost is close to being an on/off switch like it was with the old SR20 T25.

So far, I'm -extremely- happy with it. I can't wait to get this thing tuned, spool is damn near instant.
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Old 02-25-2013, 06:46 PM   #43
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pics and logs
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Old 02-25-2013, 06:50 PM   #44
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^^^

It sounds really nice. Glad you're enjoying it. Which churbo did you have on it before?
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Old 02-25-2013, 06:55 PM   #45
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NEED SPOOL DATA ASAP 4TH GEAR LOG PLOX

Glad it is working out.
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Old 02-25-2013, 07:08 PM   #46
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Getting pic updates to build thread in today guys. And trying to figure out my short, but that's another topic.

I'll probably be getting and posting spool data with logs tomorrow, assuming that classes don't CONSUME MY SOUL.

Quote:
Originally Posted by turbofan View Post
^^^

It sounds really nice. Glad you're enjoying it. Which churbo did you have on it before?
(Edit) The CXRacing 2560 analogue. Don't ever get it. It's crap.

Last edited by blaen99; 02-25-2013 at 09:43 PM.
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Old 02-25-2013, 09:19 PM   #47
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Quote:
Originally Posted by soviet View Post
EFR 6258/6758 are 0.64 ar
just saying
62mm turbine wheel means it's possible to make big power on a 0.64a/r. For reference, a 2871R is ~54mm and a T3-frame 3071R is 60mm.

If the wheel is <58mm, I'd do the 0.86a/r. Above that, do the 0.64a/r.
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Old 02-25-2013, 09:31 PM   #48
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mines 67mm iirc
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Old 02-26-2013, 10:29 AM   #49
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I went back and found my measurements I took. it's 64mm, where a regular t3 is about 4-5mm smaller.

My funky Chinacharger has a crazy inducer on the turbine, but the same exact profile/diameter exducer compared to a real t3 wheel.


you can see this here:
Attached Thumbnails
Precision 4828-dsc_0010.jpg  
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Old 02-26-2013, 08:30 PM   #50
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Update for you guys....

Something isn't quite right with the turbo setup. I can't figure out what it is easily, I first thought it was a busted coupler or something, then maybe there's an exhaust [email protected] turbine housing, I just don't know. There's an issue building boost and holding boost that I'll worry about this weekend.

But even in the current state, untuned, in 4th gear, I was able to enter boost before 2krpm.

Even in the current "Not Really Working and needs a **** ton of work done on it" state, I can definitely see why that local tuner made such a big deal about this turbo.

Last edited by blaen99; 02-26-2013 at 08:42 PM.
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Old 02-27-2013, 09:17 AM   #51
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It's nice to see people trying out different turbos, not just the same 'ole T2 garretts anymore.

I'm eager to see your results and how they compare to the garretts and the EFR.

Good luck and props for being the first to try the 4828
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Old 02-27-2013, 09:21 AM   #52
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I can enter boost backing out of my driveway...
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Old 02-27-2013, 10:28 AM   #53
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did I miss the pics and the logs?
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Old 02-27-2013, 12:00 PM   #54
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Quote:
Originally Posted by 18psi View Post
did I miss the pics and the logs?
If I can get everything figured out this weekend, I'll do it broski.

Overloaded IRL - no time until weekend for logs.

Pics are in mah build thread, FWIW.
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Old 03-03-2013, 01:54 PM   #55
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Week ended. Now started a new one. Please pay up.
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Old 03-07-2013, 03:18 AM   #56
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Quote:
Originally Posted by krissetsfire View Post
Week ended. Now started a new one. Please pay up.
Soz bro, the last couple weeks of my program are way heavier than I anticipated.

I did **** all last weekend, only did work on final projects. Same for this weekend. Same for next. Same for every day involved until final's week it appears.

I'll definitely get them ASAP I promise, but I have no ETA now. I have to fix the boost issues which aren't an immediate or easy fix.
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Old 03-26-2013, 10:58 PM   #57
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162kpa by 3krpm - running off a obviously crappy wastegate.

Logs in my build thread.
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Old 03-27-2013, 12:34 AM   #58
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I'm wanting this turbo now. Unfortunately, it would drive me to find a stouter clutch that's either expensive or not very street-able.
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Old 03-27-2013, 01:22 AM   #59
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Quote:
Originally Posted by czubaka View Post
I'm wanting this turbo now. Unfortunately, it would drive me to find a stouter clutch that's either expensive or not very street-able.
FM2 clutch is cheap and very streetable.
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Old 03-27-2013, 02:27 AM   #60
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Quote:
Originally Posted by czubaka View Post
I'm wanting this turbo now. Unfortunately, it would drive me to find a stouter clutch that's either expensive or not very street-able.
It spools /really/ similarly to the 2560, even **** all untuned.

My worry is horsepower - I'll have to dyno it asap. The 4828 is good for up to ~400 rwhp, although unknown as to what the max is on a BP engine.
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