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Author Topic: crx  (Read 2517 times)

patsmx5

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crx
« on: October 16, 2011, 06:40:24 PM »
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Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

Joseph Davis

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Re: crx
« Reply #1 on: October 16, 2011, 07:18:45 PM »
Fuck you, what's the safe stock long block power limit for a 1.8 Miata engine, champ?
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patsmx5

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Re: crx
« Reply #2 on: October 16, 2011, 07:39:43 PM »
250whp anybody can do with a decent tune. Safe tune with conservative timing and AFRs, and a stout cooling system, 300whp.

Still want that crx though.
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Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

Joseph Davis

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Re: crx
« Reply #3 on: October 17, 2011, 12:04:08 AM »
284whp it is. :mexi:
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patsmx5

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Re: crx
« Reply #4 on: October 17, 2011, 01:15:58 AM »
Quote from: Joseph Davis on October 17, 2011, 12:04:08 AM
284whp it is. :mexi:
Quote from: carkrazed on October 16, 2011, 09:56:35 PM
I've seen 400 on a bone stock BP05

I've seen 3-4 miata's make over 300whp on stock motors. But it's more of the exception than the rule. Most miata people say 220-250whp is the safe limit. But they're idiots. BP's fail in boost 99.9% of the time from detonation, caused by shit getting too hot. Of all the examples I've seen, it's either a lack of charge cooling (running 12-15 psi with no intercooler, no water injection) or a lack of engine cooling. Lack of engine cooling could be lack of coolant reroute on 94-00's, crapy radiator/fan/shroud setup, intercooler blocking airflow to radiator. And the rest from the tune being too aggressive or a combo of these.

My 99' took a 100 shot of nitrous at IDLE and bent 2 rods and blew a head gasket. Still went down the 1/8 mile 2 more times that night and drove it home 30 miles. Changed HG and drove it 2 more years, one of them boosted to 300whp. Had a little vibration to it, but it never quit.
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Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

Joseph Davis

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Re: crx
« Reply #5 on: October 17, 2011, 03:47:50 PM »
Yeah, you hear about turbo Miatas all the time but never see them for a reason.  With how MS is the #1 EMS of the Miata crowd... the bad aspect of the MS mentality follows that crowd ie they cheap out about the engine management to the point the tune is never done correctly.

I was unaware of cooling system issues as Ari's was a total rework from the ground up, so I'll make sure to yank timing and add fuel and such as a function of CTS in an attempt to soften things in a worst case scenario.  Car made 200whp Dynojet on STD corrections, I'm pretty sure even if we target 230-250 he'll be super happy with the results.  I would like to be ballsy with it, the owner's fine with me playing if I want to, but it's still his DD and I wouldn't want to put him in a bad situation.
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patsmx5

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Re: crx
« Reply #6 on: October 29, 2011, 01:08:12 AM »
Quote from: Joseph Davis on October 17, 2011, 03:47:50 PM
Yeah, you hear about turbo Miatas all the time but never see them for a reason.  With how MS is the #1 EMS of the Miata crowd... the bad aspect of the MS mentality follows that crowd ie they cheap out about the engine management to the point the tune is never done correctly.

I was unaware of cooling system issues as Ari's was a total rework from the ground up, so I'll make sure to yank timing and add fuel and such as a function of CTS in an attempt to soften things in a worst case scenario.  Car made 200whp Dynojet on STD corrections, I'm pretty sure even if we target 230-250 he'll be super happy with the results.  I would like to be ballsy with it, the owner's fine with me playing if I want to, but it's still his DD and I wouldn't want to put him in a bad situation.

Yeah, funny fact, the stock temp gauge shows "normal" from 170*F to 229*F. One of the reasons people overheat these things all the time is they don't know they are doing so.

Just bought an 05 Subaru Outback XT, turbo 2.5. Has 82K miles, looks to have been dealer maintained all its life. Anything I should know/do/check on this thing?
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Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

Joseph Davis

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Re: crx
« Reply #7 on: October 29, 2011, 02:04:55 AM »
Make sure the inline filters are removed from the turbo oil feed and AVCS solenoids (if it has them).  They are little filters like in the tip of an injector inlet, tucked in the banjo bolts of the turbo oil feed and whenre the oil lines go into the AVCS solenoids on the top of the heads right by the intake cam gears.  This is a recall item for all 04-07 Scoobs, so don't be surprised if there are none.

Most/all of the 2.5 ECUs have a misfire/roughness monitor.  Pick up a cheap Tactrix 1.3U cable (should be nice and dirty cheap as the 2.0 is $160-170 new) and scan it with RomRaider.  1-3 counts is nothing, and in fact there should be none, but if you ever see one cyl piling up count it probably has a broken ring land.  The nice thing about a Tactrix cable on a Scoob is you can disable emissions CELs and force all the readiness monitors to pass, if you live in a scantool emissions area.

Get rid of the EGT probe pre-turbo ASAP.  All they do is break off and cash turbos.  Replace the probe with a 2.2K ohm resistor.  Be prepared to replace your catted uppipe, or at least hollow it out at some point; typical break free/turn sideways/bad shit happens.

Exhaust rattles or exhaust hitting the frame = stimulates the KS = you'd think the car is fucked and coming apart.

Uhm, there's 1001 little tips and tricks to those cars... all pretty simple to figure out, to be honest.  They are odd cars, but not hard.
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