GT2554 spool is horrible
07-15-2008, 08:51 PM
#24
Former Vendor
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Location: Sunnyvale, CA
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'94 1.8 (8.8:1 comp), GT2554R w/ 7psi can, Bell S3 manifold, SSSG DP, 3" metal core cat, 3" Enthuza
the equivalent of a 4th gear pull on a 5speed/4.1 car (5th gear in my car).
1750rpm: 1.0psi
1870rpm: 2.1psi
2014rpm: 3.3psi
2478rpm: 5.4psi
2626rpm: 6.1psi
2783rpm: 7.3psi
3004rpm: 9.4psi
3188rpm: 11.0psi
3394rpm: 12.5psi
3601rpm: 14.1psi
the equivalent of a 4th gear pull on a 5speed/4.1 car (5th gear in my car).
1750rpm: 1.0psi
1870rpm: 2.1psi
2014rpm: 3.3psi
2478rpm: 5.4psi
2626rpm: 6.1psi
2783rpm: 7.3psi
3004rpm: 9.4psi
3188rpm: 11.0psi
3394rpm: 12.5psi
3601rpm: 14.1psi
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07-15-2008, 10:48 PM
#26
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Location: Point Pleasant, NJ
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you like?
here's what happened when i pulled from 1750rpm
100% tp @ 1750rpm
2000rpm 2.9psi
2200rpm 4.6psi
2500rpm 6.5psi
2700rpm 8.5psi
3000rpm 11.6psi
3200rpm 14.0psi
here's what happened when i pulled from 1750rpm
100% tp @ 1750rpm
2000rpm 2.9psi
2200rpm 4.6psi
2500rpm 6.5psi
2700rpm 8.5psi
3000rpm 11.6psi
3200rpm 14.0psi
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07-16-2008, 09:16 AM
#27
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Location: Chesterfield, NJ
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Damn. damn damn.
I will datalog my car for sure, but I think the twins can't get to 14psi til after 4000. They make like 5psi really low but then sorta stay there until the revs climb.
Anyone want a TT setup? Maybe Mark will buy one of the 1548's. Partial trade for a VVT head?
I'll use the stainless absurdflow manifold that I'm making and the 2560 off my subaru.
I bet artie is getting anxious.
I will datalog my car for sure, but I think the twins can't get to 14psi til after 4000. They make like 5psi really low but then sorta stay there until the revs climb.
Anyone want a TT setup? Maybe Mark will buy one of the 1548's. Partial trade for a VVT head?
I'll use the stainless absurdflow manifold that I'm making and the 2560 off my subaru.
I bet artie is getting anxious.
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07-16-2008, 11:40 AM
#33
Boost Czar
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Location: Chantilly, VA
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I performed some mild headwork and I gained a touch better spool.....this was with a 2.25" borla exhaust.
this is no headwork with a MBC compared to headwork with an open wastegate line.... what can clearly tell is the headwork helped spool the turbo a touch earlier....you can also see my boost creep started to appear
upgraded to a 3" magnaflow....the difference is clear:
this is no headwork with a MBC compared to headwork with an open wastegate line.... what can clearly tell is the headwork helped spool the turbo a touch earlier....you can also see my boost creep started to appear
upgraded to a 3" magnaflow....the difference is clear:
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07-17-2008, 03:59 PM
#40
Boost Czar
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I just found my log here that I took about 2 weeks ago just to record my spool....
RPM PSI
2500 1.5psi
2700 3psi
3000 5psi
3300 7psi
3600 10psi
3767 11.6psi
3788 12.9psi
3861 14.0psi
3900 16.2psi
3rd gear, 70*F morning
in fourth, log shows spool is about 150rpm faster.
can you redo with those numberz please.
RPM PSI
2500 1.5psi
2700 3psi
3000 5psi
3300 7psi
3600 10psi
3767 11.6psi
3788 12.9psi
3861 14.0psi
3900 16.2psi
3rd gear, 70*F morning
in fourth, log shows spool is about 150rpm faster.
can you redo with those numberz please.
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