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What do I need to run 9 psi?
Hi Guys,
My car is currently running comptech s/c with aftercooler with no ems. I am planning to do 9 psi and AEM EMS. What other parts should I get? Pulley, belt, injector? Can anybody guide me :) ? Thanks Eric |
Plus a whole lot of tunning
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When I upgraded my Comptech Supercharger to a 3.25" Pulley my tuner said he was able to see 9.75psi in the motor - that was according to the EMS readings. From what he told me with the temperatures being 90+ that week with 100%+ humidity, that particular pulley would have given another 1-1.5psi under cooler conditions.
When I installed that setup I had purchased the following: AEM EMS 1052-U (built in uego) AEM 3.5 Bar Map Sensor AEM Fuel Pressure Regulator 650cc Injectors ASP Racing 3.25" Pulley My tuner did state though, with the fuel pressure at 57psi under cooler conditions if i were to have gained that extra 1.5psi my injectors would have been at 84% duty cycle. If you plan to purchase a 9psi Pulley from Tech2 - I would do the things listed above. However if you plan to get a 3.25" Pulley as I did, I would recommend going ahead and stepping up to 750cc over 650cc injectors. |
Originally Posted by Black Nugget,Jan 4 2006, 05:34 AM
When I upgraded my Comptech Supercharger to a 3.25" Pulley my tuner said he was able to see 9.75psi in the motor - that was according to the EMS readings. From what he told me with the temperatures being 90+ that week with 100%+ humidity, that particular pulley would have given another 1-1.5psi under cooler conditions.
When I installed that setup I had purchased the following: AEM EMS 1052-U (built in uego) AEM 3.5 Bar Map Sensor AEM Fuel Pressure Regulator 650cc Injectors ASP Racing 3.25" Pulley My tuner did state though, with the fuel pressure at 57psi under cooler conditions if i were to have gained that extra 1.5psi my injectors would have been at 84% duty cycle. If you plan to purchase a 9psi Pulley from Tech2 - I would do the things listed above. However if you plan to get a 3.25" Pulley as I did, I would recommend going ahead and stepping up to 750cc over 650cc injectors. Which wideband did you use? As far as difference running 3.25 pulley and the whole ems thing, is there a lot of difference compared to just running stock comptech boost. I know this probably depends a lot on tuning also. Does the cart pulls harder? Another thing what about the belt for the pulley from Tech2? |
If you choose to go through Tech2 for your new Pulley, let them know that you need the belt too - that way you don't have to find it locally. I can not remember the part number for the belt that I used on the 3.25" Pulley unfortunately :(
I personally noticed a huge gain swapping from the 7psi pulley to the custom 9.75psi pulley, but then again my numbers changed from 319/180 to 358/202 - a significant gain! |
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Originally Posted by Black Nugget,Jan 4 2006, 02:34 AM
When I upgraded my Comptech Supercharger to a 3.25" Pulley my tuner said he was able to see 9.75psi in the motor - that was according to the EMS readings. From what he told me with the temperatures being 90+ that week with 100%+ humidity, that particular pulley would have given another 1-1.5psi under cooler conditions.
When I installed that setup I had purchased the following: AEM EMS 1052-U (built in uego) AEM 3.5 Bar Map Sensor AEM Fuel Pressure Regulator 650cc Injectors ASP Racing 3.25" Pulley My tuner did state though, with the fuel pressure at 57psi under cooler conditions if i were to have gained that extra 1.5psi my injectors would have been at 84% duty cycle. If you plan to purchase a 9psi Pulley from Tech2 - I would do the things listed above. However if you plan to get a 3.25" Pulley as I did, I would recommend going ahead and stepping up to 750cc over 650cc injectors. Thanks!!!! |
You can purchase injectors at numerous different places, I personall purchased them through Ben @ Horsepowerfreaks.com. I'll drop you a PM!
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Originally Posted by Black Nugget,Jan 5 2006, 02:55 PM
You can purchase injectors at numerous different places, I personall purchased them through Ben @ Horsepowerfreaks.com. I'll drop you a PM!
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Glad to help bud, let me know how things work out for ya!
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