on3 78/75 to borg 80/83 results. - LS1TECH - Camaro and Firebird Forum Discussion



Forced Induction Superchargers | Turbochargers | Intercoolers

on3 78/75 to borg 80/83 results.

Reply
 
Thread Tools Search this Thread
Old 09-11-2017, 01:41 PM   #1
9 Second Club
Thread Starter
iTrader: (2)
 
yenkomike's Avatar
 
Join Date: Aug 2013
Location: oxford mi
Posts: 929
Default on3 78/75 to borg 80/83 results.

well after running the on3 78/75 on my buddys Camaro 5.3 backhalf 3550 lb Camaro we ran a best of 9.44 at 141 mph with the on3 with open dump pipe.

swapped to a borg 80 mm std cover 83 turbine wheel with 1.25 t4 housing running open 4" dumppipe. with a couple weekends under it the best has been 9.30 at 145 mph running as close to a same tune as possible there is always differences in the weather and da but for a 3550 lb street car the on3 holds its own very well. I believe if a bigger ar housing was available they whould be a good match.

car is 75 Camaro ladder bar car 32by 16.5 quick time pro, 3.73 gear, 400th 3400 freakshow converter, stock 5.3 2005 with isky triple 12 cam 799 heads,ls9 gaskets and studs, truck manifold and t.b. stock manifolds to single 2.5 hotside. launching at 10 to 12 lbs boost getting to 21 lbs in less than a second with both turbos manual controller.

thought you guys might like to know .
yenkomike is online now   Reply With Quote
Old 09-11-2017, 01:54 PM   #2
TECH Addict
iTrader: (3)
 
forcd ind's Avatar
 
Join Date: Sep 2007
Location: woodbine, md
Posts: 2,837
Default

Interesting, was the 1/8 pretty close-I figured the 78/75 might have more bottom end, but if you were spooling them up on the line prob didn't matter.
I wonder how the 93 turbine would work
forcd ind is offline   Reply With Quote
Old 09-11-2017, 02:25 PM   #3
9 Second Club
Thread Starter
iTrader: (2)
 
yenkomike's Avatar
 
Join Date: Aug 2013
Location: oxford mi
Posts: 929
Default

the 78/75 was faster from launch to full boost like about twice as fast but the borg gets there in less than a second so the et really doesn't show it both run mid 1.3 60' times. but the on3 lays over a bit from about 6500 rpm up where the borg keeps going. I bet the .96 housing is hurting flow up that high.

both run 6.0s in the 1/8th at 115 -116 mph.
yenkomike is online now   Reply With Quote
Old 09-11-2017, 02:34 PM   #4
TECH Fanatic
iTrader: (1)
 
Join Date: Aug 2014
Posts: 1,065
Default

Interesting. The Borg turbine exducers numbers are not the same spec as other turbos. An "83"exhaust wheel on a Borg is the inducer. The exducer is actually 74 I believe, making the s480 an 80/74 in reality. So apples to apples your roughly only 2 mm bigger on the cold side and 1mm less exhaust with the s480. Let alone any difference in exhaust housing a/r. Interesting results though for sure.
3 window is offline   Reply With Quote
Old 09-11-2017, 02:47 PM   #5
9 Second Club
Thread Starter
iTrader: (2)
 
yenkomike's Avatar
 
Join Date: Aug 2013
Location: oxford mi
Posts: 929
Default

yes. any car shooting for high nines or slower looking for a fast spooling turbo . its hard to find a better working turbo for twice the money. the turbo tested was a stock on3 cast wheel $400.00 turbo
yenkomike is online now   Reply With Quote
Old 09-11-2017, 02:52 PM   #6
TECH Fanatic
iTrader: (1)
 
Join Date: Aug 2014
Posts: 1,065
Default

Great bang for your buck, no doubt.
3 window is offline   Reply With Quote
Old 09-11-2017, 05:50 PM   #7
TECH Addict
iTrader: (3)
 
forcd ind's Avatar
 
Join Date: Sep 2007
Location: woodbine, md
Posts: 2,837
Default

I was looking at the VS billet 78/75 to shave a little cost on my build, always nice to see how that size stacks up.
forcd ind is offline   Reply With Quote
Old 09-11-2017, 06:35 PM   #8
TECH Resident
iTrader: (12)
 
Cwarta's Avatar
 
Join Date: May 2012
Location: Elm Creek, NE
Posts: 776
Default

Quote:
Originally Posted by 3 window View Post
Interesting. The Borg turbine exducers numbers are not the same spec as other turbos. An "83"exhaust wheel on a Borg is the inducer. The exducer is actually 74 I believe, making the s480 an 80/74 in reality. So apples to apples your roughly only 2 mm bigger on the cold side and 1mm less exhaust with the s480. Let alone any difference in exhaust housing a/r. Interesting results though for sure.
So an s480 is comparable in size to an on 3 78/75 ?!?
Cwarta is offline   Reply With Quote
Old 09-11-2017, 08:15 PM   #9
9 Second Club
Thread Starter
iTrader: (2)
 
yenkomike's Avatar
 
Join Date: Aug 2013
Location: oxford mi
Posts: 929
Default

yes a 480 with a 83 mm turbine does but the std 480 has a 96mm turbine
yenkomike is online now   Reply With Quote
Old 09-11-2017, 08:37 PM   #10
8 Second Club
iTrader: (3)
 
3pedals's Avatar
 
Join Date: Mar 2007
Location: WPG MB
Posts: 1,864
Default

The 96mm turbine S480 will DESTROY a 78/75
3pedals is offline   Reply With Quote
Old 09-11-2017, 08:38 PM   #11
TECH Fanatic
iTrader: (1)
 
Join Date: Aug 2014
Posts: 1,065
Default

Quote:
Originally Posted by 3pedals View Post
The 96mm turbine S480 will DESTROY a 78/75
Think my 5.3 could push the big s480?
3 window is offline   Reply With Quote
Old 09-11-2017, 08:59 PM   #12
8 Second Club
iTrader: (3)
 
3pedals's Avatar
 
Join Date: Mar 2007
Location: WPG MB
Posts: 1,864
Default

no problem...
but that comes with a *
* if you want fast spool on the street at low revs, you will want the 1.10 A/R ex housing on the 96
3pedals is offline   Reply With Quote
Old 09-11-2017, 09:35 PM   #13
TECH Resident
iTrader: (12)
 
Cwarta's Avatar
 
Join Date: May 2012
Location: Elm Creek, NE
Posts: 776
Default

Ah okay, I see. I had the vs billet 78/75 and now I have the billet s480 clone, was going to benpissed if that wasn't an upgrade lol
Cwarta is offline   Reply With Quote
Old 09-12-2017, 05:48 AM   #14
9 Second Club
Thread Starter
iTrader: (2)
 
yenkomike's Avatar
 
Join Date: Aug 2013
Location: oxford mi
Posts: 929
Default

the 78/75 is a decent option if room is an issue as they are smaller in size. id say the 78/75 is a closer match to a 475/83 turbine.once the turbine gets bigger like 87,92,96 in the borgs there will get stronger and stronger.

one thing we noticed is the borg iat temps are a good 20*cooler than the on3. but it is also a solid inch bigger valute.
yenkomike is online now   Reply With Quote
Old 09-12-2017, 08:15 AM   #15
Launching!
iTrader: (31)
 
Join Date: May 2004
Location: Vermont
Posts: 287
Default

Great data to have. Thanks for helping test this stuff so the rest of us dont have to go in blind on these projects.
Floader is offline   Reply With Quote
Old 09-12-2017, 07:29 PM   #16
TECH Apprentice
iTrader: (7)
 
Preston99WS6's Avatar
 
Join Date: Aug 2005
Location: Rockingham, NC
Posts: 371
Default

With your stall speed you won't have any problem lighting off a 96mm 1.32 A/R S480 either. The extra cost of the 1.10 A/R isn't worth it. If you have access to EFI live I can show you some logs of a 5.3 spooling a cast S480 96mm at 2900rpm it was at 110 (1psi)kpa, by 3600rpm it was on the wastegate at 210 kpa 15 psi, this was in a 3500# 4th gen camaro with a th400 and Cameron 3200 mechanical diode converter 3.54 ring and pinion and elapsed time on the log was 0.8 sec 16 deg of total timing adv.

Last edited by Preston99WS6; 09-12-2017 at 07:31 PM. Reason: Error
Preston99WS6 is offline   Reply With Quote
Old 09-12-2017, 08:37 PM   #17
9 Second Club
iTrader: (8)
 
Join Date: Jan 2010
Location: No VA
Posts: 1,143
Default

Quote:
Originally Posted by Preston99WS6 View Post
With your stall speed you won't have any problem lighting off a 96mm 1.32 A/R S480 either. The extra cost of the 1.10 A/R isn't worth it. If you have access to EFI live I can show you some logs of a 5.3 spooling a cast S480 96mm at 2900rpm it was at 110 (1psi)kpa, by 3600rpm it was on the wastegate at 210 kpa 15 psi, this was in a 3500# 4th gen camaro with a th400 and Cameron 3200 mechanical diode converter 3.54 ring and pinion and elapsed time on the log was 0.8 sec 16 deg of total timing adv.
I agree, went from a On3 T4 88/84 to a billet S480 T6 96 1.32 and it spooled up faster. Both on a 5.3L absolutely no issue with the Borgs. Not sure what the stigma is with spooling up larger turbos but it seems to be a non issue if the rest of the setup and tune is there. I went to twin 69/73's on the same 5.3 and it spools them up fine as well, would actually go bigger if I were to do it again.
SLOW SEDAN is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
new best yenkomike Forced Induction 2 09-04-2017 04:46 PM
boost pressure drop during run rt338b Forced Induction 7 08-16-2017 11:52 AM
THE LIST-Top 10 STOCK BOTTOM END LSx(s) coltboostin Forced Induction 299 05-30-2017 02:58 PM
on3 78/75 5.3 new build track times. yenkomike Forced Induction 26 11-04-2016 10:45 AM
on3 78/75 turbo for sale kha4079 Parts Classifieds 2 09-16-2015 02:49 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:30 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: