P2 Supercharger Thread
- Thread starter AlexLTDLX
- Start date
Found out that in my case the friction was mainly caused by the cover for the rear bearing being too tight. After untightening these bolts the impeller spins freely again.
Has anyone confirmed the exducer diameter of the P2 compressor/impeller wheel? I noted the inducer diameter of ~3" but see no spec for the exducer. I saw the modified wheel Alex posted in the video (
) and the amount of exducer blade diameter removed will significantly affect the performance as it relates to the compressor map that is commonly used as a reference which was pointed out. The advertisement on the manufacturer's website lists the inducer diameter, but makes no mention of the exducer diameter (possibly deliberately). That is a crucial metric when planning power goals.
The wheel Alex showed looks like it is missing about an inch worth of exducer blade (.5" x 2). On comparison of two turbo compressor maps with wheels at least 4" in exducer diameter (108mm vs 133mm), that's about a 10,000 rpm difference in compressor speed for the same flow at the same boost pressure on their maps the smaller dia wheel has to achieve.
The wheel Alex showed looks like it is missing about an inch worth of exducer blade (.5" x 2). On comparison of two turbo compressor maps with wheels at least 4" in exducer diameter (108mm vs 133mm), that's about a 10,000 rpm difference in compressor speed for the same flow at the same boost pressure on their maps the smaller dia wheel has to achieve.
Hey guys I am planning to go the route of the P2 Supercharger and the Castle 2535 680kv motor with direct drive to eliminate any pulleys and belts etc. It seems that based on what Alex has mentioned in recent Youtube videos he is likely going with the Castle 2535 series motor also. My question is if I am overlooking any downside to going direct drive other than just the ability to over or underdrive the supercharger? I feel the direct drive really eliminates several failure points of a non direct/pulley and belt drive setup.
Also if anyone knows of a good place to modify or build a replacement rear cover for the P2 to mount the Castle motor to as well as make a high quality coupler please let me know. I am definitely open to the idea of splitting cost with someone or multiple someones to pay to have this done right.
ALEX hit me up if you are already working on this.
Also if anyone knows of a good place to modify or build a replacement rear cover for the P2 to mount the Castle motor to as well as make a high quality coupler please let me know. I am definitely open to the idea of splitting cost with someone or multiple someones to pay to have this done right.
ALEX hit me up if you are already working on this.
It's important to note his discovery of a negative mismatch in the P2 performance next to the accepted compressor map that has been in use and then ask yourself this question, Will direct drive spin the compressor wheel fast enough to deliver the airflow necessary to meet your power level, knowing that the actual rpm delivered under load will likely be significantly lower than the 38,000 rpm that it is rated at and that it can't be run at that speed for a long period of time even if it could reach those speeds under load.
The sledgehammer and other examples associated used motors with 50,000 rpm capability which under load probably dropped down in the area of 38,000 rpm if not lower.
For sure, I have been following all of the recent updated videos. I have been only looking at the Vortech S trim compressor map. I will be running the single supercharger only long enough to verify how the system works and get the basic tuning figured out. I will then be adding a second identical electric supercharger to run as a compound setup. My engine pairs with the S trim compressor map almost perfectly.
Given that my configuration will be in the sweet spot of the compressor map, the amount of load on the electric motor will be significantly less. Alex's engine combination really is not paired well with his P2 setup as it puts the supercharger way into the Choke area of the map and requires the max CFM from the supercharger still. This is not a dig at all to Alex as he is learning as he goes and paving the way for others. I appreciate so much that he has gone into such detail sharing his findings and not just keeping the info to himself.
The latest gen castle system capabilities are likely closer to the sledgehammer than the most recent castle 800kv motor and hobbywing esc he has used with the P2. Of course until I am able to get things put together and do real world testing with my engine I am just assuming things to a certain extent but based on what I have studied and learned from Alex's videos etc. as well as my own understanding of forced induction, electric motors and escs etc. it is really looking like this electric supercharger could be a total game changer.
I am a huge fan of pairing modern technology with combustion engines.
Thank you Maticulus for responding to my post. I appreciate your feedback and perspective you offer. This is what makes forums so great. I miss the forum days. Information is out there for many things but trying to find real information through Facebook group pages etc just isn't the same.