scoobyclinics turbo's just got billet I mean better!
26 June 2011, 06:21 PM
#2131
Ok Kev, you're pushing me toward the SC42 
, just one final question - in your above example you said the change from SC46 to SC50 (on the same car) resulted in a 1000rpm loss of spool, now I know things aren't as simple as this but since the difference between the SC46 and the SC50 is 40hp and the difference between the SC42 and SC46 is 40hp, does that also mean the SC42 would spool a 1000rpm quicker than the SC46?
As I say I'd love to see some SC42 dyno graphs (hint hint)
Cheers
Stuart
, just one final question - in your above example you said the change from SC46 to SC50 (on the same car) resulted in a 1000rpm loss of spool, now I know things aren't as simple as this but since the difference between the SC46 and the SC50 is 40hp and the difference between the SC42 and SC46 is 40hp, does that also mean the SC42 would spool a 1000rpm quicker than the SC46?As I say I'd love to see some SC42 dyno graphs (hint hint)
Cheers
Stuart
I think ive seen figures of 2600 rpm 1 bar boost on sc46 on 2.5, so if the 42 followed pattern you have suggested it would have 1bar at 1600rpm
that would be interesting to drive..Its gone hard to find info in the thread now, it is all there somewhere but its scattered over so many pages.. wonder could it be the longest SNET thread ever???
I would think spool between sc42 and 46 maybe 300 or so odd rpm, and thats not because the 42 is slow, but the sc46 seems to be sprinkled with pixie magic spool up dust or something
but Kev is the man to give a figure on this.
27 June 2011, 11:17 AM
#2132
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It doesnt work that way, The difference in the 42 and 46 might not be that much as they are using same wheel, where as the sc50 is probably using the same as 54..
I think ive seen figures of 2600 rpm 1 bar boost on sc46 on 2.5, so if the 42 followed pattern you have suggested it would have 1bar at 1600rpm that would be interesting to drive..
Its gone hard to find info in the thread now, it is all there somewhere but its scattered over so many pages.. wonder could it be the longest SNET thread ever???
I would think spool between sc42 and 46 maybe 300 or so odd rpm, and thats not because the 42 is slow, but the sc46 seems to be sprinkled with pixie magic spool up dust or something
but Kev is the man to give a figure on this.
I think ive seen figures of 2600 rpm 1 bar boost on sc46 on 2.5, so if the 42 followed pattern you have suggested it would have 1bar at 1600rpm
that would be interesting to drive..Its gone hard to find info in the thread now, it is all there somewhere but its scattered over so many pages.. wonder could it be the longest SNET thread ever???
I would think spool between sc42 and 46 maybe 300 or so odd rpm, and thats not because the 42 is slow, but the sc46 seems to be sprinkled with pixie magic spool up dust or something
but Kev is the man to give a figure on this.
you are correct in what you say, its a strange science is spool, there are so many things that change it, how the engine breaths, what sort of fuel, intake system, exhaust, etc etc.
The SC54 billet works well on my car but didnt work on a 2.5 with forged pistons, until we changed the heads, then it burst into life, however the SC46 billet worked on that engine in both its forms.
The SC46 is a well balanced good all rounder, like you say "sprinkled with spool up dust".
Wonder what is the biggest ever S/Net thread, are we in with a chance with this one.
cheers
Kev
27 June 2011, 11:33 AM
#2133
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Hi,
your set up is good to go with either the SC42 or the SC46 billets, choice is yours a bit quicker spool or bigger BHP figures.
As I have said many times in this thread, but will say it again as the thread is so big it would take a week to read it all, one of our race drivers had 550 BHP in his track car, one of our customers required some race driver tuition so Tim, the race driver, took him out in his new track car sporting an SC46 Billet, Tim was faster round Oulton in the lower BHP car than he was in his own car, all down to spool as he came out of corners, Tim stated " I want one of those ".
It is of course personnel choice, the SC42 being re -introduced for people who decide the SC46 is to big for their application yet want a BB core, and in some cases that is true, the SC46 choking up at 410 BHP due to engine spec and exhaust set up, in that case it is over kill and an SC42 would be better, its "horses for courses" as they say.
Cheers
Kev
Last edited by The Gaffer; 27 June 2011 at 11:38 AM.
27 June 2011, 12:38 PM
#2134
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Hi,
your set up is good to go with either the SC42 or the SC46 billets, choice is yours a bit quicker spool or bigger BHP figures.
As I have said many times in this thread, but will say it again as the thread is so big it would take a week to read it all, one of our race drivers had 550 BHP in his track car, one of our customers required some race driver tuition so Tim, the race driver, took him out in his new track car sporting an SC46 Billet, Tim was faster round Oulton in the lower BHP car than he was in his own car, all down to spool as he came out of corners, Tim stated " I want one of those ".
It is of course personnel choice, the SC42 being re -introduced for people who decide the SC46 is to big for their application yet want a BB core, and in some cases that is true, the SC46 choking up at 410 BHP due to engine spec and exhaust set up, in that case it is over kill and an SC42 would be better, its "horses for courses" as they say.
Cheers
Kev
your set up is good to go with either the SC42 or the SC46 billets, choice is yours a bit quicker spool or bigger BHP figures.
As I have said many times in this thread, but will say it again as the thread is so big it would take a week to read it all, one of our race drivers had 550 BHP in his track car, one of our customers required some race driver tuition so Tim, the race driver, took him out in his new track car sporting an SC46 Billet, Tim was faster round Oulton in the lower BHP car than he was in his own car, all down to spool as he came out of corners, Tim stated " I want one of those ".
It is of course personnel choice, the SC42 being re -introduced for people who decide the SC46 is to big for their application yet want a BB core, and in some cases that is true, the SC46 choking up at 410 BHP due to engine spec and exhaust set up, in that case it is over kill and an SC42 would be better, its "horses for courses" as they say.
Cheers
Kev
. What I'm still deliberating on though is, if you're prepared to sacrifice ~300rpm spool and don't want to go any higher than say ~400hp, wouldn't it be wise to run an SC46 at ~400hp at a LOWER boost (i.e. lower IAT) than an SC42 at a higher boost...Stuart
27 June 2011, 04:03 PM
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Well said!! I have indeed now read the entire thread and have a better understanding . What I'm still deliberating on though is, if you're prepared to sacrifice ~300rpm spool and don't want to go any higher than say ~400hp, wouldn't it be wise to run an SC46 at ~400hp at a LOWER boost (i.e. lower IAT) than an SC42 at a higher boost...
Stuart
. What I'm still deliberating on though is, if you're prepared to sacrifice ~300rpm spool and don't want to go any higher than say ~400hp, wouldn't it be wise to run an SC46 at ~400hp at a LOWER boost (i.e. lower IAT) than an SC42 at a higher boost...Stuart
Hi,
the important bit of your question reads "if you are prepared to sacrifice spool", and thats just it, if you are then put the bigger one on, personally I prefer spool as in my previous post, its not all about BHP.
Boost wise between the SC42 and 46 Billet there wont be much difference to see the 400 BHP you require.
cheers
Kev
27 June 2011, 04:09 PM
#2136
Nearly ready for turbo purchase!
Is there stock of the SC46, or is there a lead time between order and delivery at the moment?
Cheers Kev.
Is there stock of the SC46, or is there a lead time between order and delivery at the moment?
Cheers Kev.
Last edited by legacy_gtb; 27 June 2011 at 04:26 PM.
27 June 2011, 04:25 PM
#2138
Well said!! I have indeed now read the entire thread and have a better understanding . What I'm still deliberating on though is, if you're prepared to sacrifice ~300rpm spool and don't want to go any higher than say ~400hp, wouldn't it be wise to run an SC46 at ~400hp at a LOWER boost (i.e. lower IAT) than an SC42 at a higher boost...
Stuart
. What I'm still deliberating on though is, if you're prepared to sacrifice ~300rpm spool and don't want to go any higher than say ~400hp, wouldn't it be wise to run an SC46 at ~400hp at a LOWER boost (i.e. lower IAT) than an SC42 at a higher boost...Stuart
If you have a FMIC, then when mapped, you won't have to worry about the IATs anyway! Just enjoy it!
Last edited by joz8968; 27 June 2011 at 04:28 PM.
27 June 2011, 04:28 PM
#2139
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in stock, we always keep the whole range in stock just got caught out two weeks ago when there was a mad rush on them and a small delay in our shipment.
We have put lots of measures in place to make sure its unlikely to happen again.
cheers
Kev
27 June 2011, 04:35 PM
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I certainly wouldn't choose a bigger turbo just so that you're able to run lower boost pressure for the same bhp output, because of potential 'worry' of the IATs. I'd choose the smaller one and enjoy quicker spool-up everytime!
If you have a FMIC, then when mapped, you won't have to worry about the IATs anyway! Just enjoy it!
If you have a FMIC, then when mapped, you won't have to worry about the IATs anyway! Just enjoy it!
well put.
The SC42 billet is intended for the 2.0 ltr cars, anything with a bigger capacity should run the SC46 Billet with no noticeable loss in spool due to the bigger capacity.
This is not to say the SC46 Billet is not suitable for 2.0 ltr cars but in some cases it would be deemed overkill, and that few hundred RPM's worth of spool would be lost for absolutely no reason.
cheers
Kev
27 June 2011, 05:40 PM
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kindof hi-jack an apologies in advance
but seems like "the" turbo thread,
could someone explain , compressor surge, and why its bad and how you get rid of it?
also exhaust housing, does a smaller size generally mean less lag, with a slight loss in top end power?
thanks in advance
but seems like "the" turbo thread,
could someone explain , compressor surge, and why its bad and how you get rid of it?
also exhaust housing, does a smaller size generally mean less lag, with a slight loss in top end power?
thanks in advance
Hi,
compressor surge is an aerodynamic stall, the turbo starts to "chuff" when you ask it to spool, usually more noticeable when travelling at a set speed such as 70MPH, apply throttle and instead of the rush of air delivered to the engine you get a massive oscillation with the turbo making a "chuffing" sound and car lurching on and off boost, quiet unpleasant, change down a gear before applying more gas and it wont do it, driver re-training is not always an option.
In answer to you exhaust housing query, yes a smaller housing will spool quicker than a larger one but top end figures will suffer.
cheers
Kev
27 June 2011, 06:38 PM
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Hi,
well put.
The SC42 billet is intended for the 2.0 ltr cars, anything with a bigger capacity should run the SC46 Billet with no noticeable loss in spool due to the bigger capacity.
This is not to say the SC46 Billet is not suitable for 2.0 ltr cars but in some cases it would be deemed overkill, and that few hundred RPM's worth of spool would be lost for absolutely no reason.
cheers
Kev
well put.
The SC42 billet is intended for the 2.0 ltr cars, anything with a bigger capacity should run the SC46 Billet with no noticeable loss in spool due to the bigger capacity.
This is not to say the SC46 Billet is not suitable for 2.0 ltr cars but in some cases it would be deemed overkill, and that few hundred RPM's worth of spool would be lost for absolutely no reason.
cheers
Kev
I'm running a 2.5 and am having enough trouble deciding between the SC42 and SC46 (as you know
)...Stuart
27 June 2011, 07:36 PM
#2145
Hi,
your set up is good to go with either the SC42 or the SC46 billets, choice is yours a bit quicker spool or bigger BHP figures.
As I have said many times in this thread, but will say it again as the thread is so big it would take a week to read it all, one of our race drivers had 550 BHP in his track car, one of our customers required some race driver tuition so Tim, the race driver, took him out in his new track car sporting an SC46 Billet, Tim was faster round Oulton in the lower BHP car than he was in his own car, all down to spool as he came out of corners, Tim stated " I want one of those ".
It is of course personnel choice, the SC42 being re -introduced for people who decide the SC46 is to big for their application yet want a BB core, and in some cases that is true, the SC46 choking up at 410 BHP due to engine spec and exhaust set up, in that case it is over kill and an SC42 would be better, its "horses for courses" as they say.
Cheers
Kev
your set up is good to go with either the SC42 or the SC46 billets, choice is yours a bit quicker spool or bigger BHP figures.
As I have said many times in this thread, but will say it again as the thread is so big it would take a week to read it all, one of our race drivers had 550 BHP in his track car, one of our customers required some race driver tuition so Tim, the race driver, took him out in his new track car sporting an SC46 Billet, Tim was faster round Oulton in the lower BHP car than he was in his own car, all down to spool as he came out of corners, Tim stated " I want one of those ".
It is of course personnel choice, the SC42 being re -introduced for people who decide the SC46 is to big for their application yet want a BB core, and in some cases that is true, the SC46 choking up at 410 BHP due to engine spec and exhaust set up, in that case it is over kill and an SC42 would be better, its "horses for courses" as they say.
Cheers
Kev
27 June 2011, 08:43 PM
#2146
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Kev,
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
27 June 2011, 10:23 PM
#2147
Kev,
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
28 June 2011, 09:46 AM
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Kev,
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
I've been looking at getting a SC46 for a while now but have always been torn between rotated and standard position. I know its been stated that the rotated seem to breathe better so my question to you is do you thnk an SC46 on rotated setup would make a significant difference?
Hayward and scott do a rotated setup with standard fit flanges, any experience with these?
cannot see what that would achieve, if you want to go rotated do it properly and go with a GT30 Billet.
Rotating a direct fit would cost as much as rotating a Gt30/33/35 turbo which actually start life cheaper than the direct fit units.
Price update time.
Direct fit sleeve bearing turbo's
SC36 BILLET (16G)............£750.00
SC38 BILLET (18G)............£895.00
SC40 BILLET (20G)............£950.00
DIRECT FIT BALL BEARING TURBO'S
SC42 BILLET ................... £1,250.00
SC46 BILLET ....................£1,295.00 (twin scroll same price but exchange exhaust housing)
SC50 BILLET ....................£1,350.00
SC54 BILLET ....................£1,425.00
ROTATED TURBO'S
GT30 BILLET .................... £1,175.00
GT33 BILLET .....................£1,295.00
GT35 BILLET .....................£1,225.00
Rotated pipe work £849.00, either T3 flange or Tial V band fitment.
External waste-gates 44mm Tial £350.00.
all prices + vat
cheers
Kev
08 July 2011, 09:48 AM
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Hi,
yesterday we were invited to Santa Pod by universal studios for a promotional release of fast and furious 5 on blue ray.
Mikee took the clinic drag car to take certain VIP's up the drag strip, this was carried out with great success, the car managing a 10.2 with a passenger.
The promotional team were so impressed they have invited us back today as the chosen car to take celebs down the drag strip, this time we are to be fitted with an in car camera to catch their reactions.
Should be fun.
cheers
Kev
yesterday we were invited to Santa Pod by universal studios for a promotional release of fast and furious 5 on blue ray.
Mikee took the clinic drag car to take certain VIP's up the drag strip, this was carried out with great success, the car managing a 10.2 with a passenger.
The promotional team were so impressed they have invited us back today as the chosen car to take celebs down the drag strip, this time we are to be fitted with an in car camera to catch their reactions.
Should be fun.
cheers
Kev
08 July 2011, 09:58 AM
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stocks cylinders heads are flow limited...That's why I'm hesitating between sc46 and sc50...
My ej257 (cylinder+heads) + wiseco pistons + exhaust manifold + injectors (etc), wants more HP than its td06sl 20g permits...(around 420hp with UTEC e85 and meth)
What would be the best compromise (for a 30% DD and 70% track car)?
In fact,
-I'm afraid the sc46 would not make a lot of improvement
-I'm afraid the sc50 would be limited with stocks cams and cylinder heads
-I'm sure the sc54 needs others cams and heads
Is there a dyno of the sc50 on a 2.5 ltr with stocks cams and heads?
Thanks
Vincent (from France...sorry for my poor english)
My ej257 (cylinder+heads) + wiseco pistons + exhaust manifold + injectors (etc), wants more HP than its td06sl 20g permits...(around 420hp with UTEC e85 and meth)
What would be the best compromise (for a 30% DD and 70% track car)?
In fact,
-I'm afraid the sc46 would not make a lot of improvement
-I'm afraid the sc50 would be limited with stocks cams and cylinder heads
-I'm sure the sc54 needs others cams and heads
Is there a dyno of the sc50 on a 2.5 ltr with stocks cams and heads?
Thanks
Vincent (from France...sorry for my poor english)