Will GT3076R + S2 Cams Laggy for Uphill & Track Attack?
Apr 11, 2012, 10:27 AM
#1
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Will GT3076R + S2 Cams Laggy for Uphill & Track Attack?
Hi,
just wonder is a GT3076R with S2 cams on a 2.0L still be great for Uphill & Track attack if the tune is good?
Thanks
just wonder is a GT3076R with S2 cams on a 2.0L still be great for Uphill & Track attack if the tune is good?
Thanks
Apr 11, 2012, 06:00 PM
#4
Depends on the housing. Here is a before and after of a 2.0L VIII with an HTA3076 and S1s. Also included for S&G's is the same car with a Red. I am not ******* the Red AT ALL but power per pound vs spool it cant compete. It takes FP to beat FP.
Red to 0.63 A/r is a 200 rpm spool loss but a 33whp gain up top.
0.63 to 0.82 is a 350 rpm spool loss and 8-10whp here.
FP Red is run 22 (in red), the 0.82 single scroll is green, and the 0.63 is blue. In this combo I think they would have made the same exact power at that boost level if I had leaned the top out instead of leaving it richer for road racing. 26psi it had definitely choked and lost 20whp going from the 0.82 to the 0.63.
Where I am going with this is combination is everything. S2s might make it laggy but it depends on what intake manifold, what 3076, what housing, twin scroll or not, etc.
Red to 0.63 A/r is a 200 rpm spool loss but a 33whp gain up top.
0.63 to 0.82 is a 350 rpm spool loss and 8-10whp here.
FP Red is run 22 (in red), the 0.82 single scroll is green, and the 0.63 is blue. In this combo I think they would have made the same exact power at that boost level if I had leaned the top out instead of leaving it richer for road racing. 26psi it had definitely choked and lost 20whp going from the 0.82 to the 0.63.
Where I am going with this is combination is everything. S2s might make it laggy but it depends on what intake manifold, what 3076, what housing, twin scroll or not, etc.
Apr 11, 2012, 08:12 PM
#7
Wow Aaron comes through with the goods yet again!
Thanks for the info, that really puts things into perspective.
Aaron have you tested the normal Garrett 0.63 T3 housing versus a vband in/out housing? (like the tial)
Looking at those graphs i would take the 0.63 over the 0.82 for sure, it's only losing power over 7k rpm.
Cheers, Mike
Thanks for the info, that really puts things into perspective.
Aaron have you tested the normal Garrett 0.63 T3 housing versus a vband in/out housing? (like the tial)
Looking at those graphs i would take the 0.63 over the 0.82 for sure, it's only losing power over 7k rpm.
Cheers, Mike
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Apr 11, 2012, 11:41 PM
#8
Evolved Member
Thread Starter
Thanks Aaron,
mine is an ATP GT3076R
compressor housing = A/R60
turbine housing = 0.63
T3 type
S2 Cams
Stock Intake & T/B
300 x 600 x 70mm I/C
Btw, if swapping to a smaller I/C (Stock size) & lower the W/G spring rate help the turbo spool faster?
mine is an ATP GT3076R
compressor housing = A/R60
turbine housing = 0.63
T3 type
S2 Cams
Stock Intake & T/B
300 x 600 x 70mm I/C
Btw, if swapping to a smaller I/C (Stock size) & lower the W/G spring rate help the turbo spool faster?
Apr 12, 2012, 11:55 AM
#9
Mike,
I have not tested the smaller 0.63 Tial housings though I sold 2 of them to a customer in Oz for his GTR. It will be interesting to see what that does, but obviously doesnt help much for the discussion at hand.
Aaron
Apr 17, 2012, 06:06 PM
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Hmmm. James, I am curious as to why you might think that lowering the WG's spring rate might reduce turbocharger spoolup time, or the rate of spool....ever?
Last edited by sparky; Apr 17, 2012 at 06:10 PM.
Apr 17, 2012, 07:43 PM
#14
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Thread Starter
im just curios as im running dual springs on my wg now and im hoping if say, i remove 1 of the spring and i wonder will it help my surge problem?
Im boosting 1.6bar with my 38mm Turbosmart WG so is this wg size a little to small for my turbo & boost?
Thanks
Apr 17, 2012, 07:59 PM
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Ultimately, I am wondering about the relevance of comparing the FP HTA 3076 to the Red when the OP has the ATP 3076 which was pretty much considered a dog in comparison to the newer, considerably more state of the art HTA 3076 and the GTX 3076 turbos.
Furthermore, for comparison's sake I think that it is at least worth noting that in most cases the Red has never been an overachiever in the lower 20# boost range. The Red doesn't really start to come into its own powerwise on a 2.0L motor until above 27 PSI.
Was the Red in the comparison a 64mm version or the 80mm variety? Was it a BB Red or a JB Red. Was the Red in question mounted on a stock manifold whereas the HTA 3076 was on a tubular header?
Spoolup comparisons of different turbos on different manifolds with different types of wastegates set at different levels of preload and etc. can all fudge up a spool comparison.
So eventhough the test was made on the same car, I choose to take it with a grain of salt.
Note: it might seem like I am picking a fight, but I am not by any means. I am merely playing the Devil's advocate in this case. Aaron is probably right and he should know this stuff better than any of us. Maybe I am just a sucker for the Red. It might be because I have one, duh! LOL
Furthermore, for comparison's sake I think that it is at least worth noting that in most cases the Red has never been an overachiever in the lower 20# boost range. The Red doesn't really start to come into its own powerwise on a 2.0L motor until above 27 PSI.
Was the Red in the comparison a 64mm version or the 80mm variety? Was it a BB Red or a JB Red. Was the Red in question mounted on a stock manifold whereas the HTA 3076 was on a tubular header?
Spoolup comparisons of different turbos on different manifolds with different types of wastegates set at different levels of preload and etc. can all fudge up a spool comparison.
So eventhough the test was made on the same car, I choose to take it with a grain of salt.
Note: it might seem like I am picking a fight, but I am not by any means. I am merely playing the Devil's advocate in this case. Aaron is probably right and he should know this stuff better than any of us. Maybe I am just a sucker for the Red. It might be because I have one, duh! LOL
Last edited by sparky; Apr 17, 2012 at 08:12 PM.