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max psi?
- Flashpoint2
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max psi?
What's the maximum boost you can throw at a stock DOHC 4? safely, anyways ![Smile :)](./images/smilies/icon_smile.gif)
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Re: max psi?
I have done 22 psi on a t3 super 60
Proud builder of
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(Current Project) A 700 hp MX-3 now at 475 hp
455 hp Miata 10.98@125mph
MX-3 RS 25 psi 451 hp
MX-6 F2T 12.8 @ 112 mph
(Current Project) A 700 hp MX-3 now at 475 hp
- hotsiit
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This is an old post I know, but just thought id ask......Hey minimonster, was that 22psi on a stock mx-3 1.6l dohc 4cyl? No internal work? Im currently running ~8psi on the stock SOHC 4cyl in my mx and just curious as to your setup...........plus im bored and looking allover the new ubb
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1993 Mazda MX-3 RS-Turbo
1993 Mazda RX-7 touring
1983 Mazda RX-7 GSL
1995 Subaru Impreza L AWD Sedan
1987 Jeep Comanche
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Yes it was a stock internal motor. But it had a great ecu on it.hotsiit wrote:This is an old post I know, but just thought id ask......Hey minimonster, was that 22psi on a stock mx-3 1.6l dohc 4cyl? No internal work? Im currently running ~8psi on the stock SOHC 4cyl in my mx and just curious as to your setup...........plus im bored and looking allover the new ubb![]()
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Proud builder of
455 hp Miata 10.98@125mph
MX-3 RS 25 psi 451 hp
MX-6 F2T 12.8 @ 112 mph
(Current Project) A 700 hp MX-3 now at 475 hp
455 hp Miata 10.98@125mph
MX-3 RS 25 psi 451 hp
MX-6 F2T 12.8 @ 112 mph
(Current Project) A 700 hp MX-3 now at 475 hp
So on a stock engine (1.6 DOHC) without any mods (stronger rods/pistons/bearings) you did 22psi??? That's awsome. Did you also leave the compression rate the same (9.0:1).
So in fact you can run everything under 22psi on just a stock engine??
One last question. I've done over 160000KM with my car, would this be a problem when turbocahrging it??
So in fact you can run everything under 22psi on just a stock engine??
One last question. I've done over 160000KM with my car, would this be a problem when turbocahrging it??
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please note that 22psi doesn't really mean much. all that means is how much the turbo has to work to get to a certain point. running 15psi on a vj20 is different than running 15psi on a huge t3/t04. the bigger turbo flows more cfm, so it's psi level will be lower to achieve the same outcome. the more air, if compensated correctly with the proper fuel and spark, will create more hp. so you have to take into consideration the size of the turbo for each application. also....tuning is EVERYTHING!
drag323, what do you have done to the valvetrain to support a 9k redline? have you put it on a dyno to show it's still making power that high up? i know the turbo will still make power, provided your manifold/exhaust isn't choking it.(based on your times, i'd say no) just not sure if you'd be floating the valves that high up.
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drag323, what do you have done to the valvetrain to support a 9k redline? have you put it on a dyno to show it's still making power that high up? i know the turbo will still make power, provided your manifold/exhaust isn't choking it.(based on your times, i'd say no) just not sure if you'd be floating the valves that high up.
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Hey RazorMX-3
It is all about tuning, most of the guys on here who have turboed their DOHC MX3 4cycl are running anywhere from 7-12psi. I currently run 10psi on a bone stock engine. Once you have proper management like a Link or Haltech standalone ECU, you could easily run 14psi+
It is all about tuning, most of the guys on here who have turboed their DOHC MX3 4cycl are running anywhere from 7-12psi. I currently run 10psi on a bone stock engine. Once you have proper management like a Link or Haltech standalone ECU, you could easily run 14psi+
JSpec Turbo MX3 (1.6 DOHC)
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Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
http://www.cardomain.com/memberpage/310985
Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
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The stock IHI VJ series turbos found on the B6T, BPT etc are both oil and water cooled.
JSpec Turbo MX3 (1.6 DOHC)
http://www.cardomain.com/memberpage/310985
Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
http://www.cardomain.com/memberpage/310985
Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
- TEAMpK
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I put a VJ-11 on my mx-3 with 140,000 miles on it. She had a weee bit of a oil leak. Lasted 4 months and I blew 2 pistons and a headgasket. I am now awaiting my B6T motor. I don't think running anything over 7psi is really a good idea on a high mileage motor unless you do a rebuild off all your seals and all. Thats just my opinion.