reducing spool
09-03-2008, 11:02 PM
#1
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reducing spool
with more of us starting to run bigger turbos, this subject needs to be addressed. on my setup, it doesn't start *** hauling mod untill about 4500rpm. what are somethings we can do to reduce spool?
everyone knows the better flowing exhaust the better. i plan on porting my turbo exhuast houseing, that "should" help a tad, i hope. but is there anything else to do?
does charge pipe diameter affect spool? intake going into the turbo? port out the exhaust ports/mani inlet? anything worth doing?
everyone knows the better flowing exhaust the better. i plan on porting my turbo exhuast houseing, that "should" help a tad, i hope. but is there anything else to do?
does charge pipe diameter affect spool? intake going into the turbo? port out the exhaust ports/mani inlet? anything worth doing?
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09-03-2008, 11:25 PM
#3
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Smaller turbo LOL.
Anything that improves VE in the RPM range in which it spools. In your example, 3500-4000 RPM. For example, cam timing changes that improve torque in that region.
And advancing the exhaust cam so it opens earlier.
Anything that improves VE in the RPM range in which it spools. In your example, 3500-4000 RPM. For example, cam timing changes that improve torque in that region.
And advancing the exhaust cam so it opens earlier.
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09-04-2008, 09:55 AM
#9
Are you saying that the boost doesn't start a steep rise until 4500? OR it doesn't hit target until 4500? If it's the latter- that's pretty good spool for a decent sized t3/t4 on a 1.6 IMO.
You need to find out what exact specs are of your t3/t4. Smaller ARs are a relatively simple way to change spool- and smaller is cheaper in the world of t3/t4... especially on t3. You could even go as far as putting a big t3 compressor on.
You need to find out what exact specs are of your t3/t4. Smaller ARs are a relatively simple way to change spool- and smaller is cheaper in the world of t3/t4... especially on t3. You could even go as far as putting a big t3 compressor on.
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09-04-2008, 10:01 AM
#11
Head work is the biggest thing you could do. (reducing spool doesn't sound right, don't you want to increase it?) Porting makes a huge difference when done right and will add power everywhere and help spool and increase the usable rev range by increasing VE at the higher RPMs. But you'll need a book or two on porting to know what to do.
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09-04-2008, 03:14 PM
#14
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with more of us starting to run bigger turbos, this subject needs to be addressed. on my setup, it doesn't start *** hauling mod untill about 4500rpm. what are somethings we can do to reduce spool?
everyone knows the better flowing exhaust the better. i plan on porting my turbo exhuast houseing, that "should" help a tad, i hope. but is there anything else to do?
does charge pipe diameter affect spool? intake going into the turbo? port out the exhaust ports/mani inlet? anything worth doing?
everyone knows the better flowing exhaust the better. i plan on porting my turbo exhuast houseing, that "should" help a tad, i hope. but is there anything else to do?
does charge pipe diameter affect spool? intake going into the turbo? port out the exhaust ports/mani inlet? anything worth doing?
Reply
0
0
09-04-2008, 06:10 PM
#20
Gain 10-25% more power and drop spool 500-1000 RPMs.
http://books.google.com/books?id=283...um=1&ct=result
http://books.google.com/books?id=283...um=1&ct=result
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