Bought a Volvo V50, now I feel like my Miata is slow - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-11-2010, 04:21 PM   #21
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either way you're going to want a better exhaust. i'd actually get a bigger turbo and forget about the bottom end you're never going to get anyway, and this way you'll be able to get the 220+whp you need to be fairly quick
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Old 04-11-2010, 04:37 PM   #22
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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.
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Old 04-11-2010, 04:47 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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Old 04-11-2010, 05:08 PM   #24
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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.
we arent talking about all vehicles we are talking about miatas fwiw i have good low end and high end hp and good fuel economy. You only pay for the horses you use man. Twinchargeing is a waste.
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Old 04-12-2010, 08:53 PM   #25
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I'll probably pick up a 3" exhaust, see what difference that makes.

a 1.8 would be nice but i'm not nearly technical enough to install it myself so i think costs would start getting out of hand (engine, clutch, flywheel, injectors, mani, dp)

-tomaj
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Old 04-12-2010, 10:06 PM   #26
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lol its not that hard to RR a motor your main issue would be $ though cause it means a whole new setup just about.
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Old 04-12-2010, 10:16 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
WTF? who in nj is charging 125 for 3 pulls?! Dayum. There's the semiannual miatatturbo dyno day in delaware, 60 for a shitload of pulls. Get with it man! Christ. See lots of setups and talk to lots of guys who mostly know what they are doing.
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Old 04-12-2010, 10:34 PM   #28
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There's a guy around the corner from my house "ATX Motorsports". I'm pretty sure he said $125 for 3 pulls.. That was over a year ago, so maybe more now, maybe less..

Delaware's like 4 hrs' driver from here! My wife won't let me off the leash for that long ;-)
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Old 04-12-2010, 10:49 PM   #29
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i suggest you hook up wif turbo tim he can get you time cheaper than that i am sure. hell i can get a full hr of dyno time for that in ky.
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Old 04-13-2010, 11:26 AM   #30
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My wife won't let me off the leash for that long
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Bitch that was a mistake!
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Old 04-16-2010, 06:31 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.
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Old 04-20-2010, 12:36 AM   #32
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I think you should go for a ride in a miata that has the same power.

I think everyone answered your question. Bigger injectors, tune it, 3" exhaust turn up the boost.

That tiny *** turbo should have you spinning tire all over.
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