sure he said it was 28r, maybe he forgot the sOriginally Posted by Mark
You will never get that out of a 28R on a SR20
RS yes but not the R
Mine is making 290@17psi measured at SRR
also that power figure is well wrong when you compare it to the torque, i would say that was putting out around 280bhp
that power figure wouldn't of been at the wheels
bovvered?
I thought bhp was only a general guideline that the amount of pressure it can take how much it can flow at that pressure was more important factor
My turbo's rated to 1.2bar. After discussing it with Papa Lazarou (The SXOC's resident turbo Guru) I've discovered that the bhp figure associated with a turbo was only a guideline, because if you think of it you can push in the same amount of pressure from a turbo, but depending on the mods surrounding it you'll get more power or less power, also depending on the fuel you're using.
The fact that I got 343bhp out of this turbo using E85 on the stock manifold & inlet plenum etc shows that this holds true whereas on 95RON petrol with the same setup the best I got was 328bhp. What I concluded was the best way to see how much "power" a turbo can give you in reality is what amount of pressure it can take safely & how much it can flow at that pressure. The amount of air it passes will dictate how powerful it really is.
Last edited by geogge; 17-01-2008 at 13:44.
Think the 28r has a slightly bigger exhaust housing
nope, its a standard T28 with a roller bearing core
All depends.......
I've ran stage 3 on a GT28RS. And that was a freakish stage 3 that ran 340 bhp & 370 ftlb on a dynodynamics RR.
I now have the 2871, and it properly wipes the floor with my stage 3 set up. Personally I would suggest there is a much larger difference than you think between set ups with these two turbos
Currently scrabble powered - Leon Cupra 280
You can't deduce the second fact from the first there.
Just because someone specialises in track car work doesn't guarantee their RR won't give optomistic readings.
2004 - on : 1999 S14a 398bhp 378lb/ft
2010 - on : 2007 RX8 PZ
1998 - 2004 : 1991 S13
As said above JP's made 343bhp on E85 @ 1.2 BARYou will never get that out of a 28R on a SR20
RS yes but not the R
Mine is making 290@17psi measured at SRR
also that power figure is well wrong when you compare it to the torque, i would say that was putting out around 280bhp
I know it from experience of going there numerous times.You can't deduce the second fact from the first there.
Just because someone specialises in track car work doesn't guarantee their RR won't give optomistic readings.
Some of my friends have been going there for years and are very good friends with the guy who runs it, he has tons of experience and definitely knows what he is doing.
(ask any of the guys who came with me on this RR day... http://www.sxoc.com/vbb/showthread.php?t=277073)
Last edited by Ghazoobe; 17-01-2008 at 13:57.
Still doesnt prove the RR is accurate though does it
put your car on there and find out for yourself thenStill doesnt prove the RR is accurate though does it
You pay for it and i will
errr ...... noYou pay for it and i will
its only £30
if you want I'll let you know when I'm gonna go down there next, as I want to get my car RR before I fit all my new bits
I agree with Mark. The number of years you have been going there, the level of friendship with the owner, the competence and experience of the guy as a tuner, and whether he knows what he is doing or not, are all completely irrelevant as to whether the RR reads optimistically or not, and it's quite worrying that you think these have any bearing on this fact.
As has been said the only way is to try the same car (or cars preferably on a RR day) in the same environmental conditions if possible.
2004 - on : 1999 S14a 398bhp 378lb/ft
2010 - on : 2007 RX8 PZ
1998 - 2004 : 1991 S13
But what about the fact that people on here seem to think that you can only get about 310bhp max out of a 28 when there are people who have managed to get more. The power associated with each turbo is only guideline and not its max rating. The bhp figure of a turbo should be based on the amount of air it will flow, supporting mods and fuel type being used combination.
of course it would have some sort of ****ing bearing on what the RR is like, someone who knows what he's doing is hardly likely to be using a dodgy RR is he?I agree with Mark. The number of years you have been going there, the level of friendship with the owner, the competence and experience of the guy as a tuner, and whether he knows what he is doing or not, are all completely irrelevant as to whether the RR reads optimistically or not, and it's quite worrying that you think these have any bearing on this fact.
As has been said the only way is to try the same car (or cars preferably on a RR day) in the same environmental conditions if possible.
bring your car along sometime and see for yourself instead of sitting there babbling about it. I'm not gonna sit here having this pathetic argument about it. The phone number of Track n Road is on that other thread I posted, you could always call and ask them about it.
Last edited by Ghazoobe; 17-01-2008 at 15:03.
Thats fair enough but the mods used and fuel used ect doesnt change "that" much between our cars, at least i couldnt see it accounting for a difference of 20-30 odd HP.
A healthy and young t28 with a quality map (one done with very little margin of safety for the exact car its fitted to) may well do 310 or 315 with the stg2 mods we normally have.
But its likely to self destruct earlier in its life, and be near the det limit if running agressive ignition ect, so much so that it will have issues with even slightly iffy fuel or what ever.
Its more likley that we are seeing overinflated figures from RR's that are either incorrectly setup, or just slightly optimistic as some are.
JP got 328bhp with 95RON @1.2bar and got 343bhp with E85 @1.2bar with the same setup using T28r
Nobody has said it is dodgy. Some RR's read a little higher than others. If you can't see how any of those points you raise are irrelevant there's not much left to be saidof course it would have some sort of ****ing bearing on what the RR is like, someone who knows what he's doing is hardly likely to be using a dodgy RR is he?
bring your car along sometime and see for yourself instead of sitting there babbling about it. I'm not gonna sit here having this pathetic argument about it. The phone number of Track n Road is on that other thread I posted, you could always call and ask them about it.
If you have been going there 25 years, know the guy so well you marry him in a civil partnership, and he is the country's best tuner it still has no bearing on whether his RR reads higher than say a Dyno Dynamics one.
You seem unable to see this fundamental point.
2004 - on : 1999 S14a 398bhp 378lb/ft
2010 - on : 2007 RX8 PZ
1998 - 2004 : 1991 S13
If you can get 328bhp out of 95 ron dishwater on a typical s14 engine with standard stg2 mod's, reliably and replicable on other RR's then i will bare my arse in woolworths shop window.JP got 328bhp with 95RON @1.2bar and got 343bhp with E85 @1.2bar with the same setup using T28r
you seem unable to see the fundamental point that someone who knows what he is doing and whos business relies on tuning race/track cars which need to be spot on will undoubtedly have to have a very perfect RR otherwise his business is going to be taken away by other people who do have a more perfect RR.Nobody has said it is dodgy. Some RR's read a little higher than others. If you can't see how any of those points you raise are irrelevant there's not much left to be said
If you have been going there 25 years, know the guy so well you marry him in a civil partnership, and he is the country's best tuner it still has no bearing on whether his RR reads higher than say a Dyno Dynamics one.
You seem unable to see this fundamental point.
theres no point arguing silly points about it with me, I feel that its the best RR I've ever used and will stand by that opinion and everyone I know who has used it also has that same opinion.
If you want to know more about it either call the guy who owns it (Steve) or just go there and see for yourself.
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