Bought a Volvo V50, now I feel like my Miata is slow
04-11-2010, 03:37 PM
#22
You should be fine with your 2554 unless you plan to push more than the low 200 hp range. The exhaust sucks but hard to say how bad it's hurting you. I'd say first step is get a little bigger injectors and find someone to help with tune.
A 2554 should be spooling quick enough to feel good under 4k. Log a few runs in 4th gear from 2500 rpms until you hit full boost. Let us know what your spool is like. X psi at 2500, 2750, 3000, 3250, 3500, etc.
A 2554 should be spooling quick enough to feel good under 4k. Log a few runs in 4th gear from 2500 rpms until you hit full boost. Let us know what your spool is like. X psi at 2500, 2750, 3000, 3250, 3500, etc.
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04-11-2010, 03:47 PM
#23
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Dump the 1.6 and put in a 1.8. The difference in low-end torque between these motors (both turboed, of course) is night and day. You'll need a new exhaust manifold and downpipe, and should upgrade your exhaust, injectors, etc. In return, you'll reach your stated goal of making your Volvo seem slow.
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04-11-2010, 04:08 PM
#24
Not if you really want good fuel economy, good low end torque and good high end power out of a small displacement engine; all small displacement vehicles don't weight 2,200lbs and have manual transmissions with stiff rear end gearing! Compounding requires a LOT of engineering to work properly but it will give good low end torque and high end power. If you watch the OEMs you'll see that a few of them (VW comes to mind) already have compound setups in production. Superchargers for compounds are generally easier to install on V-engines that inlines (supercharger rests nicely in the valley). Sequential turbochargers would be easier to engineer and install on a inline Miata engine and would provide most of the benefits of a compound setup.
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04-12-2010, 09:16 PM
#27
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damnit, i wrote a whole reply and lost it.. here it goes again 
I have a begi-s with gt2554 turbo. Kept the FPR with the 305s, can hit 10.0 AFR under full boost.
Fuel & Timing is tuned on the street, no dyno time.. local guy quoted me "125 for three pulls". I don't knwo if that's enough time to really do anything so i haven't gone yet
Current timing map attached, maybe that's part of it?
Oh -- my exhaust is a 2.25" stainless steel "made in china" deal w/glasspack exhaust. the cat is by magnaflow.
-Tomaj
I have a begi-s with gt2554 turbo. Kept the FPR with the 305s, can hit 10.0 AFR under full boost.
Fuel & Timing is tuned on the street, no dyno time.. local guy quoted me "125 for three pulls". I don't knwo if that's enough time to really do anything so i haven't gone yet
Current timing map attached, maybe that's part of it?
Oh -- my exhaust is a 2.25" stainless steel "made in china" deal w/glasspack exhaust. the cat is by magnaflow.
-Tomaj
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04-16-2010, 05:31 AM
#31
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My sister has an S40 T5, it will chirp tires on crosswalk paint if you aren't careful. It's silly how much low end power that thing has.
3" exhaust will help, getting a real tune will help.
3" exhaust will help, getting a real tune will help.
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