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PostPosted: Mon Jan 21, 2008 1:35 pm 
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Location: Trinidad & Tobago (the caribbean)
hi guys, i am new to this forum. i recently aquired a mirage hatch. code: C53A MNDF. Its got a 4G61T and i want to build some power, probably in the 250hp range. i am taking it bit by bit. i just got an adjustable fuel regulator and was wondering what's the best psi i should operate at? the car is currently on 10psi of boost.


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PostPosted: Mon Jan 21, 2008 2:03 pm 
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Run it at factory stock base pressure.
Manuals can be obtained here: www.lilevo.com/mirage/
Look for the 89 Colt Turbo labelled manual folder.
You have a rising rate 1:1 for boost, FPR right?

The most basic of mods can be cross over from the 1G platform which is the same engine setup mostly and alot of the same external parts.
Check out Vfaq.com for the best entry level mods.

Are you still on the factory turbo setup, 11b?
Stock exhaust, etc. We will need to know these things to better help you along.

First step beyond upping the boost with a MBC (Manual Boost Controller), is to install a FMIC setup, perform a fuel pump rewire kit install (also Vfaq material), and then look at cleaning up the exhaust and a few things in the engine bay.


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PostPosted: Mon Jan 21, 2008 3:14 pm 
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THE CAR IS STILL STOCK. EVERYTHING ORIGINAL. MY NEXT STEPS WERE GUAGES (OIL PRES & AIR FUEL RATIO), COIL OVERS, SAFC 1, CLUTCH & PRESSURE PLATE UPGRADE, FMIC UPGRADE WITH PIPING AND BOV, WALBRO 255 FUEL PUMP THEN EXHAUST SYSTEM (NOT SURE OF THE SIZE). A STEP UP IN BOOST OR A TD05 16G UPGRADE WHEN ALL OF THE OTHER STEPS ARE IN PLACE. HOW DOES THAT SOUND? ANY ADVICE OR INTERJECTION WILL BE GREATLY APPRECIATED.


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PostPosted: Mon Jan 21, 2008 4:07 pm 
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2nd Banana
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Quote:
THE CAR IS STILL STOCK. EVERYTHING ORIGINAL. MY NEXT STEPS WERE GUAGES (OIL PRES & AIR FUEL RATIO), COIL OVERS, SAFC 1, CLUTCH & PRESSURE PLATE UPGRADE, FMIC UPGRADE WITH PIPING AND BOV, WALBRO 255 FUEL PUMP THEN EXHAUST SYSTEM (NOT SURE OF THE SIZE). A STEP UP IN BOOST OR A TD05 16G UPGRADE WHEN ALL OF THE OTHER STEPS ARE IN PLACE. HOW DOES THAT SOUND? ANY ADVICE OR INTERJECTION WILL BE GREATLY APPRECIATED.
A 16G would be a good upgrade, but it would require larger injectors if you really want to use it to its fullest. 550cc's are the bare minimum. EVO 8-9 injectors are a popular swap. At the same time it would also be good to upgrade the MAF sensor to a 2g Eclipse unit, or go with a GM MAF Translator (i happen to prefer to MAF Translator).

Also, turn off your caps lock and add a location in your profile, thanks.

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91 GSX - 511fwhp and 352 lb/ft 25psi 110 octane, 7.68 @ 95.9mph 1/8th 21psi 91 octane, 11.93 @ 112.9mph, 117.7mph best trap speed, 20psi 91 octane
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PostPosted: Tue Jan 22, 2008 10:45 am 
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I forgot to add that we need the VIN for the VIN Registry, delinquent1!
If it's a Mirage, I just need the VIN to decode the car and options, but I need more to get a complete listing from Plymouth/Dodge. PM me if you are interested and I'll tell you more. Oh, General Discussion sticky has the VIN Registry post if you are curious.


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PostPosted: Wed Jan 23, 2008 8:41 am 
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i will pm the vin info for u a bit later today. thanks for the help. the other problem i have is that where i live i believe that there are only two of these vehicles in the entire country. the evo 8-9 injectors wont be a problem to source but the maf's and other parts won't be easy. any help in this department will be greatly appreciated.


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PostPosted: Fri Jan 25, 2008 8:57 am 
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larger ports and valves? should i get it done or is there a head that could directly replace mine?


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PostPosted: Fri Jan 25, 2008 11:24 am 
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You can get a 4G67 head of a Hyundai Elantra, they have the 4G63 head port sizes and the same combustion chamber size as your 4G61T head. This way you get the big ports, while keeping your compression the same. People have put the 4G63 head on a 4G61T bottom end, but it does lower the compression a good bit.


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PostPosted: Fri Jan 25, 2008 10:12 pm 
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The Silent Administrator
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Quote:
People have put the 4G63 head on a 4G61T bottom end, but it does lower the compression a good bit.

Understatement of the century do to the lowest compression I think we could find over the last 40 years of mass produced automobile engines! Not razzing ya, just stating that loosing all that bottom end and having a completely improperly sized combustion chamber for the mated parts, will yield some not so good results from an "upgrade" standpoint. Grab that 4G67 head!


Last edited by Flying Eagle on Wed Jan 30, 2008 10:42 am, edited 1 time in total.

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PostPosted: Wed Jan 30, 2008 8:52 am 
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sorry about the late response got a little tied up. the 4g67 head. is it turbo or n/a? if turbo i have never heard of that and don't think we got that over here. also i looked on an elantra head that a buddy of mine has and it has 1.8l 3c enscribed between the cam gears on the aluminum and mine has 18 with a 5 below it in the same location, what does this mean?


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PostPosted: Wed Jan 30, 2008 10:46 am 
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Check and compare to what we know from this post:
http://forum.4g61t.org/viewtopic.php?t=14041

You should have an NA 4g67 head, but it doesn't matter what type NA or turbo, as NA heads can be used and a port at the front passenger side of the head can be tapped for oil port supply to the turbo setup. Some NA heads already have the oil journal plug with allen key head, so you may get lucky, but not all came this way as it may just be a Mitsu thing because they are the only ones with turbo and NA versions of the same head.


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PostPosted: Wed Jan 30, 2008 12:50 pm 
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thanks for the info and link man. i am learning new things every day. i guess this means that i dont have to go looking for a 4g67 head. :lol: guess i could just mozey on along with my project.


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PostPosted: Thu Jan 31, 2008 9:52 am 
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Oh, almost forgot to remind you about the VIN('s)! 8)


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PostPosted: Thu Jan 31, 2008 12:36 pm 
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i pm'd the info as on the plate on the fie wall any additional info just ask.


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PostPosted: Tue May 04, 2010 3:43 pm 
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Joined: Sat Nov 05, 2005 11:13 am
Posts: 25
Location: Toronto, Canada
best is to start of with a stock turbo set up and just work yourself up by replacing some stuff with upgrades. Cams, intake manifold etc...


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