Guest RHDSupra203 Posted April 12, 2008 Share Posted April 12, 2008 I have a N/A 93 J-spec Supra. I will be boosting it in a few months via a PHR Stage 2 kit off of MVPmotorsports.com. The kit comes with tons of goodies: Extreme 2000 Black Heat Coated PHR Cast-steel Exhaust Manifold Garrett GT60 Turbocharger with Polished Compressor Housing ITS ProGate External 50mm Wastegate Stainless Steel Oil Inlet and Drain Lines 2.5” Aluminum Intercooler Piping HKS 300x600x65mm Intercooler Core HKS Super Sequential Blow Off Valve Blow Off Valve Mounting Flange PHR 3mm Metal Head Gasket 3” High Flow K&N Air Filter 3” Aluminum Air Inlet Piping 3” Mandrel Bent Extreme 2000 Black Heat Coated Downpipe 6 x 440cc Fuel Injectors PHR 17.25mm High Flow Fuel Rail 6AN Fuel Inlet Lines Aeromotive 1:1 Fuel Pressure Regulator Liquid Filled 52mm Fuel Pressure Gauge 255lph Walbro In-tank Fuel Pump Upgrade Speed Density Based Fuel Computer (PHR MAP ECU) to Provide Extended Fuel Mapping. My question is at what point do i need to replace/upgrade the internals of the motor? IE Piston rods, pistons, sleeves, ect... i'm new to the 2JZ engine. i know on the B18 motor i had in my Integra after 12 to 14psi you needed to upgrade such parts if you wanted a engine you weren't worried about blowing. how strong is the 2JZ and when do i need to worry about upgrading the bottom and top end? Link to comment Share on other sites More sharing options...
johnny g Posted April 12, 2008 Share Posted April 12, 2008 With a good map, you should be ok to 1.0-1.2bar according to what I've read on here. I'm planning 1.2bar on my GT35R single - will those injectors be big enough? Link to comment Share on other sites More sharing options...
sidewaysdan Posted April 12, 2008 Share Posted April 12, 2008 ive seen a 2jz on the dyno pulling 800hp on stock internals.dont know about a n/a Link to comment Share on other sites More sharing options...
tooquicktostop Posted April 12, 2008 Share Posted April 12, 2008 You dont have to upgrade your engine internals but it would be worth having a compression test to make sure all is healthy before you start, I would worry about the 440 injectors though, you will need something bigger and you will need an ECU or piggy back as well Link to comment Share on other sites More sharing options...
johnny g Posted April 12, 2008 Share Posted April 12, 2008 Good point there mate - speak to Ryan about an ECU solution. bear in mind you probably shouldn't drive it after it's been installed until it's been mapped... Link to comment Share on other sites More sharing options...
Steve Posted April 12, 2008 Share Posted April 12, 2008 The list has a Map ECU in there. Link to comment Share on other sites More sharing options...
Steve Posted April 12, 2008 Share Posted April 12, 2008 Dont forget this is a n/a guys, so without lowering the compression, you wont be able to run that much boost anyway. So the 440's would probably be ok. Link to comment Share on other sites More sharing options...
johnny g Posted April 12, 2008 Share Posted April 12, 2008 Hmm ... suppose. In that case, it's just a case of seeing how far it can be pushed. This is the area where the mapper earns his money... Let's just hope the wastegate spring isn't set too high! Probably be fine mate. Link to comment Share on other sites More sharing options...
Scooter Posted April 12, 2008 Share Posted April 12, 2008 Dont forget this is a n/a guys, so without lowering the compression, you wont be able to run that much boost anyway. So the 440's would probably be ok. 3mm head gasket is mentioned in the kit........ Link to comment Share on other sites More sharing options...
Steve Posted April 12, 2008 Share Posted April 12, 2008 3mm head gasket is mentioned in the kit........ Missed that Although it is not the best way to lower the compression though. Link to comment Share on other sites More sharing options...
johnny g Posted April 12, 2008 Share Posted April 12, 2008 Err no, definately not... but it works Link to comment Share on other sites More sharing options...
Guest RHDSupra203 Posted April 12, 2008 Share Posted April 12, 2008 Hmm ... suppose. In that case, it's just a case of seeing how far it can be pushed. This is the area where the mapper earns his money... Let's just hope the wastegate spring isn't set too high! Probably be fine mate. the kit says "This is a complete kit that addresses all aspects of aftermarket turbocharging, from lowering the compression ratio to increasing fueling requirements for the higher boost levels. The Stage 2 turbo kit makes 400-550 RWHP at varying boost levels from 15-22 psi and can be used with the automatic or 5 speed manual Non-Turbo Supra. Automatic transmission owners keep in mind that the transmission will need to be upgraded to handle the added power, and we recommend the installation of an external transmission cooler and higher stall torque converter to make the most use of the added horsepower. Five speed manual transmission owners will need to purchase an aftermarket clutch kit capable of handling 450+ horsepower. Available for the 1993-1997 model Non-Turbo Supra only. " Link to comment Share on other sites More sharing options...
tooquicktostop Posted April 12, 2008 Share Posted April 12, 2008 the kit says "This is a complete kit that addresses all aspects of aftermarket turbocharging, from lowering the compression ratio to increasing fueling requirements for the higher boost levels. The Stage 2 turbo kit makes 400-550 RWHP at varying boost levels from 15-22 psi and can be used with the automatic or 5 speed manual Non-Turbo Supra. Automatic transmission owners keep in mind that the transmission will need to be upgraded to handle the added power, and we recommend the installation of an external transmission cooler and higher stall torque converter to make the most use of the added horsepower. Five speed manual transmission owners will need to purchase an aftermarket clutch kit capable of handling 450+ horsepower. Available for the 1993-1997 model Non-Turbo Supra only. " 550 RWHP on 440 injectors, I dont think so, not for very long anyway Link to comment Share on other sites More sharing options...
Guest RHDSupra203 Posted April 12, 2008 Share Posted April 12, 2008 so maybe 440 injectors will be fine? Link to comment Share on other sites More sharing options...
Guest RHDSupra203 Posted April 12, 2008 Share Posted April 12, 2008 550 RWHP on 440 injectors, I dont think so, not for very long anyway hmm perhaps not then. so what size injectors do you recomend? Link to comment Share on other sites More sharing options...
johnny g Posted April 12, 2008 Share Posted April 12, 2008 660cc's I'd say for 550whp. I've read somewhere that it's around 1.2cc per whp. Let me see if I can dig that up. You could eek the base fuel pressure up, but I'd not fancy pushing too far Link to comment Share on other sites More sharing options...
tooquicktostop Posted April 12, 2008 Share Posted April 12, 2008 660cc's I'd say for 550whp. I've read somewhere that it's around 1.2cc per whp. Let me see if I can dig that up. You could eek the base fuel pressure up, but I'd not fancy pushing too far I dont really think this kit makes 550 RWHP anyway to be honest but thats another story As above you will need bigger injectors and a proper way of controlling the fuel set up, I would consider selling the NA and getting a TT and BPU, you will make in excess of 400 BHP FWHP and the options to go single are easier than an NA-T Link to comment Share on other sites More sharing options...
and1c Posted April 12, 2008 Share Posted April 12, 2008 hmm perhaps not then. so what size injectors do you recomend? 750cc Link to comment Share on other sites More sharing options...
Guest RHDSupra203 Posted April 12, 2008 Share Posted April 12, 2008 I dont really think this kit makes 550 RWHP anyway to be honest but thats another story As above you will need bigger injectors and a proper way of controlling the fuel set up, I would consider selling the NA and getting a TT and BPU, you will make in excess of 400 BHP FWHP and the options to go single are easier than an NA-T as for the 550whp, just a friendly reminder we are talking about the legendairy Garrett GT60 turbocharger. as for selling my Supra well, lets just say that's not an option. If the Acura Integra (which i know a lot more about) can make 500hp to the crank on 20 pounds of boost with 91 octane pump gas. Then i just do not see why a 2JZ can't make 550whp on 22 pounds of boost shoved down it's throat by a GT60. Then again i'm new to Supra's so i could be wrong as far as my thoughts about the car is concerned...? Link to comment Share on other sites More sharing options...
and1c Posted April 13, 2008 Share Posted April 13, 2008 as for the 550whp, just a friendly reminder we are talking about the legendairy Garrett GT60 turbocharger. as for selling my Supra well, lets just say that's not an option. If the Acura Integra (which i know a lot more about) can make 500hp to the crank on 20 pounds of boost with 91 octane pump gas. Then i just do not see why a 2JZ can't make 550whp on 22 pounds of boost shoved down it's throat by a GT60. Then again i'm new to Supra's so i could be wrong as far as my thoughts about the car is concerned...? Im not familiar with that turbo?! but the 2JZ GE can easily make that rwhp reliably. especially on a US dynojet Link to comment Share on other sites More sharing options...
Guigsy Posted April 13, 2008 Share Posted April 13, 2008 i hear the NA's in the USA make 500bhp stock... Link to comment Share on other sites More sharing options...
Guest RHDSupra203 Posted April 13, 2008 Share Posted April 13, 2008 i hear the NA's in the USA make 500bhp stock... haha what the hell are you smoking? and fyi i have a J-Spec N/A i imported... Link to comment Share on other sites More sharing options...
bromy Posted April 13, 2008 Share Posted April 13, 2008 As mentioned internals will be fine (crank and con rods same as a TT) you will however need to lower the compression as mentioned ideally by using TT pistons but a headgasket change will suffice. I think the 3.0mm is a bit of a overkill, boostlogic do a 2.5mm Cometic item which lowers the compression to 8.5:1. Injector wise go with Boostlogics Precision brand I think they are 650 or 680cc. It sounds like you are doing things properly so in my experience I would ditch the MAP and go for the AEM ECU. All in all I would go for the stage 1 kit and customise it yourself to suit, Have you considered the Boostlogic stage 1 kit? Link to comment Share on other sites More sharing options...
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