Originally Posted by On-the-bog
(Post 11895479)
damn thats laggy :o
https://cimg0.ibsrv.net/gimg/www.sco...fc23d5874c.jpg |
Ah just re-read it, thought it was on a 2.5.
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Originally Posted by On-the-bog
(Post 11895485)
Ah just re-read it, thought it was on a 2.5.
sorry mate it's me who can't read :lol1: |
Originally Posted by On-the-bog
(Post 11895479)
damn thats laggy :o
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add my bit here, I have a cheap Chinese eBay 20g that was £125 band new with 1 year warranty.
Must be doing the business as my full weight newage (1500kg with driver) does consistent 12.3's with it, so circa 380hp. I love all the tubro snobbery |
Originally Posted by SmurfyBhoy
(Post 11895486)
I think that last graph was on a 2.5 actually so yea i thought a 2.5 would wake it up earlier,
sorry mate it's me who can't read :lol1: So statement stands, I'd expect it to be 1000 rpm earlier to full torque so very very laggy |
Originally Posted by boosted
(Post 11895490)
add my bit here, I have a cheap Chinese eBay 20g that was £125 band new with 1 year warranty.
Must be doing the business as my full weight newage (1500kg with driver) does consistent 12.3's with it, so circa 380hp. I love all the tubro snobbery |
Originally Posted by On-the-bog
(Post 11895495)
ah i re-re-read and yeah rb5 with s forged 2.5 hahaha.
So statement stands, I'd expect it to be 1000 rpm earlier to full torque so very very laggy Would've been acceptable had it been on a 2.0 would expect over 400 ft/lbs from a built 2.5, |
Originally Posted by boosted
(Post 11895490)
add my bit here, I have a cheap Chinese eBay 20g that was £125 band new with 1 year warranty.
Must be doing the business as my full weight newage (1500kg with driver) does consistent 12.3's with it, so circa 380hp. I love all the tubro snobbery or is it a guestimate ? If it's doing those times who cares what brand it is :) |
For comparison, all pulling considerably more power and spool
https://www.scoobynet.com/799025-sco...l#post10499895 post 3554 even outspooled by a 2.0 https://www.scoobynet.com/799025-sco...etter-126.html post 3761 |
Originally Posted by On-the-bog
(Post 11895496)
It's nothing to do with snobbery at all, its to do with best results of spool vs power.
Originally Posted by SmurfyBhoy
(Post 11895498)
Can we see a graph for this cheapo turbo ;)
or is it a guestimate ? If it's doing those times who cares what brand it is :) |
Originally Posted by boosted
(Post 11895501)
Full boost 1.6 bar by 2800rpm, 1.5 bar held to 6500+
It's does 12.3's, 379bhp is the power required to do those times with 1500kg. That's more accurate than a rolling road. Power isn't important, the speed of the car is what matters I shall explain, cheap knockoffs tend to have much larger tolerances, however that doesn't mean 1 in 1000 can't be a good match and tolerances be very tight, so it performs ok. |
Originally Posted by On-the-bog
(Post 11895502)
Maybe yours is (got a dyno graph for comparison, spool is typically later on a dyno). But every turbo performs differently on different cars not to mention you may have got one that is decent.
I shall explain, cheap knockoffs tend to have much larger tolerances, however that doesn't mean 1 in 1000 can't be a good match and tolerances be very tight, so it performs ok. I have had four engines and Seven tubros on my Impreza in 3 years, this is the fastest. I have owned and ran 8 cheap Chinese turbos over the years all with good results (from escorts, sierras, BMW, golf, two impreza's) also ran genuine garretts, holsets and mhi tubros. |
Originally Posted by Ste333
(Post 11895488)
well it is a 25G I suppose :) interesting to see the numbers though
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Originally Posted by boosted
(Post 11895501)
Full boost 1.6 bar by 2800rpm, 1.5 bar held to 6500+
It's does 12.3's, 379bhp is the power required to do those times with 1500kg. That's more accurate than a rolling road. Power isn't important, the speed of the car is what matters Full boost on a 2.0 by 2800rpm ? or is it a 2.5 ? Be nice to see a graph to compare |
Originally Posted by boosted
(Post 11895501)
It's does 12.3's, 379bhp is the power required to do those times with 1500kg. That's more accurate than a rolling road.
|
Originally Posted by SmurfyBhoy
(Post 11895507)
Is there any proof of this ?
Full boost on a 2.0 by 2800rpm ? or is it a 2.5 ? Be nice to see a graph to compare |
1 Attachment(s)
Originally Posted by Ste333
(Post 11895508)
That's very specific...how do you come to that calculation? Not taking the piss, just generally out of interest :idea:
Attachment 28849 |
Originally Posted by boosted
(Post 11895510)
2.5 9:1 compression. Proof of what?
Not doubting just always good to see a timeslip/dyno graph/datalog ? So its a fully forged higher compression 2.5 ? |
Originally Posted by boosted
(Post 11895511)
What about transmission losses and the thousands of other variables ? Id say give or take 10% |
1 Attachment(s)
Originally Posted by SmurfyBhoy
(Post 11895512)
Proof of the power the spool any of these claims lol ?
Not doubting just always good to see a timeslip/dyno graph/datalog ? So its a fully forged higher compression 2.5 ? Attachment 28848 |
uh target calculator says 417bhp, its only when you put it in the calculated time (1500kg and 379bhp) is says 12.3.
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Originally Posted by boosted
(Post 11895514)
Yeah, 2.5 with wrx heads, 8.9:1 compression and a 7cm cast 20g.
http://i959.photobucket.com/albums/a...psd6h2miti.png Fook me did you do those times at Crail ? :eek: |
Originally Posted by SmurfyBhoy
(Post 11895513)
Those apps are bull**** tbh,
What about transmission losses and the thousands of other variables ? Id say give or take 10% However the weight and times don't lie.... |
Originally Posted by SmurfyBhoy
(Post 11895516)
Fook me did you do those times at Crail ? :eek:
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Originally Posted by On-the-bog
(Post 11895515)
uh target calculator says 417bhp, its only when you put it in the calculated time (1500kg and 379bhp) is says 12.3.
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Originally Posted by boosted
(Post 11895517)
Are they really?! What about said descepencies with a RR? It's all relative and all educated guesswork.
However the weight and times don't lie.... Also were talking about spool here anyway so dyno would be the like for like. |
I thought a fully loaded newage oiled and fueled was closer to 1600kg,
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Originally Posted by boosted
(Post 11895518)
Yep, best bit is I mapped the car myself with a megasquirt
I suspect you have a fair chunk of torque to go with "only" 380 ish bhp, Guessing well over 400Ftlbs 420 ish even |
Originally Posted by On-the-bog
(Post 11895520)
in this case there's no benchmark times to compare the turbo's, hence the dyno benchmark, which while are slightly varying, decent dyno's typicly show results very similar.
Also were talking about spool here anyway so dyno would be the like for like. I had a genuine evo3 big 16g on my 2.0l before the 2.5, it spooled about 3800 and couldn't hold boost up the top... 20g was spooling at 2800 and dropping like a stone too until I discovered an inlet pipe restriction... now it holds boost all the way. Can only assume this was the problem with the previous setup too. My point being let's not be too quick to blame the tubro. Chinese or not. |
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