DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Precision 4828

Thread Tools
 
Search this Thread
 
Old 02-21-2013, 06:44 PM
  #41  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
Default

that's not how they work.
Braineack is offline  
Old 02-25-2013, 05:44 PM
  #42  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

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.
blaen99 is offline  
Old 02-25-2013, 05:46 PM
  #43  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,821
Total Cats: 3,481
Default

pics and logs
18psi is offline  
Old 02-25-2013, 05:50 PM
  #44  
Supporting Vendor
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Lake Forest, CA
Posts: 7,949
Total Cats: 1,003
Default

^^^

It sounds really nice. Glad you're enjoying it. Which churbo did you have on it before?
__________________
Ed@949Racing/Supermiata
www.949racing.com
www.supermiata.com
turbofan is offline  
Old 02-25-2013, 05:55 PM
  #45  
Elite Member
iTrader: (2)
 
thenuge26's Avatar
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,267
Total Cats: 239
Default

NEED SPOOL DATA ASAP 4TH GEAR LOG PLOX

Glad it is working out.
thenuge26 is offline  
Old 02-25-2013, 06:08 PM
  #46  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

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.

Originally Posted by turbofan
^^^

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 08:43 PM.
blaen99 is offline  
Old 02-25-2013, 08:19 PM
  #47  
Former Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Default

Originally Posted by soviet
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.
Savington is offline  
Old 02-25-2013, 08:31 PM
  #48  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
Default

mines 67mm iirc
Braineack is offline  
Old 02-26-2013, 09:29 AM
  #49  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
Default

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  
Braineack is offline  
Old 02-26-2013, 07:30 PM
  #50  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

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 leak@the 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 07:42 PM.
blaen99 is offline  
Old 02-27-2013, 08:17 AM
  #51  
Elite Member
iTrader: (4)
 
Efini~FC3S's Avatar
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,309
Total Cats: 98
Default

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
Efini~FC3S is offline  
Old 02-27-2013, 08:21 AM
  #52  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
Default

I can enter boost backing out of my driveway...
Braineack is offline  
Reply
Leave a poscat -1 Leave a negcat
Old 02-27-2013, 09:28 AM
  #53  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,821
Total Cats: 3,481
Default

did I miss the pics and the logs?
18psi is offline  
Old 02-27-2013, 11:00 AM
  #54  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

Originally Posted by 18psi
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.
blaen99 is offline  
Old 03-03-2013, 12:54 PM
  #55  
Senior Member
iTrader: (1)
 
krissetsfire's Avatar
 
Join Date: Sep 2008
Location: Tucson, Arizona
Posts: 883
Total Cats: 56
Default

Week ended. Now started a new one. Please pay up.
krissetsfire is offline  
Old 03-07-2013, 02:18 AM
  #56  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

Originally Posted by krissetsfire
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.
blaen99 is offline  
Old 03-26-2013, 09:58 PM
  #57  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

162kpa by 3krpm - running off a obviously crappy wastegate.

Logs in my build thread.
blaen99 is offline  
Old 03-26-2013, 11:34 PM
  #58  
Senior Member
iTrader: (3)
 
czubaka's Avatar
 
Join Date: Apr 2012
Location: Sacile, Italy
Posts: 501
Total Cats: 105
Default

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.
czubaka is offline  
Old 03-27-2013, 12:22 AM
  #59  
Elite Member
iTrader: (24)
 
viperormiata's Avatar
 
Join Date: Aug 2008
Location: Key West
Posts: 6,110
Total Cats: 283
Default

Originally Posted by czubaka
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.
viperormiata is offline  
Old 03-27-2013, 01:27 AM
  #60  
Elite Member
Thread Starter
iTrader: (6)
 
blaen99's Avatar
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 3,611
Total Cats: 25
Default

Originally Posted by czubaka
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.
blaen99 is offline  


Quick Reply: Precision 4828



All times are GMT -4. The time now is 07:29 AM.