Why is my spool slow?
10-23-2013, 12:20 PM
#21
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If 3">2.5", then why not 3.5"? 4"? Maybe with a 6" exhaust it'll spool up at 500 RPM!!! Where's the diminishing returns?
Anyone have data showing an improvement on a 1.6 going from a 2.5 to a 3"? I cheked on my VVT motor and the difference was slight (<100 rpm).
I'll be the dissenting voice and say at his power level a good 2.5" exhaust will not spool noticeably worse than a 3".
After eliminating leaks in the intake piping and the 2.25" exhaust as the cause of slow spoolup the biggest improvement will come from a smaller turbo. The GT2554 is big enough to max out the torque capacity of the stock rods in a 1.6.
Anyone have data showing an improvement on a 1.6 going from a 2.5 to a 3"? I cheked on my VVT motor and the difference was slight (<100 rpm).
I'll be the dissenting voice and say at his power level a good 2.5" exhaust will not spool noticeably worse than a 3".
After eliminating leaks in the intake piping and the 2.25" exhaust as the cause of slow spoolup the biggest improvement will come from a smaller turbo. The GT2554 is big enough to max out the torque capacity of the stock rods in a 1.6.
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10-23-2013, 12:36 PM
#22
If the question was 'should I upgrade from my good 2.5" exhaust to a 3"' I would agree with you. But if OP is getting a new exhaust anyway, why not go for 3"?
And if a 3.5" downpipe would fit without major modification I would bet that everyone would would have 3.5" turbo back. Why not?
And if a 3.5" downpipe would fit without major modification I would bet that everyone would would have 3.5" turbo back. Why not?
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10-23-2013, 01:11 PM
#24
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Is the enthuza 2,5" or 3" very loud? I know it's louder than stock, but I mean too loud for road use? I like a sportive street sound, but not a very loud exhaust
2,5" vs 3" found this for what it's worth
"nahh you dont need 3 inch exhaust for power..." - MX-5 Miata Forum
I'm getting smarter, please feed me more guys
2,5" vs 3" found this for what it's worth
"nahh you dont need 3 inch exhaust for power..." - MX-5 Miata Forum
I'm getting smarter, please feed me more guys
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10-23-2013, 01:40 PM
#28
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So a 2,5" or 3" exhaust is a must, thats for sure now. Lets say that the spool will improve about aprox 300rpm compared with my 2" now? Right???
If I would mount forged rods an go to a safe 1,3bar=18,8psi would this improve my spooling?
If I would mount forged rods an go to a safe 1,3bar=18,8psi would this improve my spooling?
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10-25-2013, 10:25 AM
#34
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If you give Enthuza a call, you can customize the number and type of resonators and/or mufflers. I talked to the owner about my Miata build, sound/noise level requirements, etc and he built a header back exhaust to the agreed to specs. He was very helpful.
Doesn't help someone in Europe and lot, but thought a more local reader might find this a good option.
Doesn't help someone in Europe and lot, but thought a more local reader might find this a good option.
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10-25-2013, 10:33 AM
#36
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I've sent Abe an e-mail. Those Artech pipes are absolutely beautiful...
I will order one from the USA if no other option...
the only 2,5" made in Europe I found was this: Simons:
Mazda MX5
It's a shame that magnaflow doesn't provide one. the only 2,5" they have is with two pipes. the single one is 2,25... Damn
And 3" is custom order USA, no other options. the question I keep asking myself is: Do I need a 3" exhaust after a 2,5" Begi DP for max 270rwhp (in the future)?
I will order one from the USA if no other option...
the only 2,5" made in Europe I found was this: Simons:
Mazda MX5
It's a shame that magnaflow doesn't provide one. the only 2,5" they have is with two pipes. the single one is 2,25... Damn
And 3" is custom order USA, no other options. the question I keep asking myself is: Do I need a 3" exhaust after a 2,5" Begi DP for max 270rwhp (in the future)?
Last edited by miatadaxdriver; 10-25-2013 at 10:54 AM.
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10-25-2013, 01:56 PM
#38
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Nope, and if so totally unaffordable. In Europe it really sucks to buy parts for two reasons.
- to expensive
- mostly non existing
Everything I search for but can't find => Buy in the USA
I bought wheels, turbo kit,clutch, stickers,gauges,spoilers and so on
The only thing that really sucks are the import taxes and customs (In Europe)
The rule for Europe (Belgium in my case) is quite simple: add 33% to the value of your order and that's the price it will cost
- to expensive
- mostly non existing
Everything I search for but can't find => Buy in the USA
I bought wheels, turbo kit,clutch, stickers,gauges,spoilers and so on
The only thing that really sucks are the import taxes and customs (In Europe)
The rule for Europe (Belgium in my case) is quite simple: add 33% to the value of your order and that's the price it will cost
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