Best (low compression) ATI Blower Cam?
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From: Dublin, CA
Best (low compression) ATI Blower Cam? I'm looking for a blower cam that most people are happy with. This is on a forged motor with 8.8:1CR and Stage 2 blower heads. This is on a C5 with 3.5" blower pulley and MMS bracket setup.
Right now I'm running a Cam that's 224/227 .563/.569 114 LSA. Although I love the lope, I think I'm losing pressure through the overlap.
Anyone running a blower cam they're happy with?
Right now I'm running a Cam that's 224/227 .563/.569 114 LSA. Although I love the lope, I think I'm losing pressure through the overlap.
Anyone running a blower cam they're happy with?
Launching!
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From: St. Louis
Re: Best (low compression) ATI Blower Cam? R1 here. 232/236 .574 .579 114 VERY happy with it! Made 542rwhp through a 9" with stock valves, stock shortblock, 10.3:1 compression, full exhaust and 6#'s of boost. 
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From: Chi-Town, IL
Re: Best (low compression) ATI Blower Cam? I think if you are stock C.I.'s you shouldn't go over 220's for duration....I'm using a tiny 214/218 cam in my 372 motor, its what I was using in my 346 originally..
In the future I will most likely step up to a 224/226 .590/.600 117lsa
In the future I will most likely step up to a 224/226 .590/.600 117lsa
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? I read somewhere not to over cam a blower setup. Yet I see people using 224+ duration cams. Since the blower is forcing air into the motor why is alot of duration needed? I can see running more lift though.
Re: Best (low compression) ATI Blower Cam? I am using a 218/224 .521/.533 @114 LSA. I made 488rwhp and 455 rwtq with only 5 psi in my low compression 9.5:1 all forged set-up.
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? I can get my hands on a 218/224 cam cheap. But I guess my new 218/228 115lsa cam will work as good. Packy...Do you like your P1SC? I was think about sell my *NEW* P1SC kit and order a D1SC kit from Tbryne this week. I bought the P1SC kit 8 months ago but haven't installed it yet, so it's new in the box. I guess if I got a good price I would think about selling the kit and order the D1SC 7# kit. I bought the extended warranty for my kit, so I have over 2 years left on it.
I think I'm gonna install my MMS blower cam first on my current setup and see if I like it. If I don't I'll call Comp Cams and have a customer blower cam made. I called them a few months ago and told them I wanted a 218/224 cam and they recommended to me a 218/224 .563/.568 115lsa cam. Plus it's got some killer lobes. If I don't like the stage 1 MMS blower cam I'll call Comp.
Packy, where does the P1SC blower start to make boost? Thanks.
Den
I think I'm gonna install my MMS blower cam first on my current setup and see if I like it. If I don't I'll call Comp Cams and have a customer blower cam made. I called them a few months ago and told them I wanted a 218/224 cam and they recommended to me a 218/224 .563/.568 115lsa cam. Plus it's got some killer lobes. If I don't like the stage 1 MMS blower cam I'll call Comp.
Packy, where does the P1SC blower start to make boost? Thanks.
Den
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From: Columbia, MD
Re: Best (low compression) ATI Blower Cam? Be aware of the ATI belt slippage issues. Since I see you plan on running a forged bottom end, then you must also plan on high boost (9+ PSI). I would hold off on purchasing a D1SC kit until the belt issues are resolved, or else go with the Vortech kit.
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? I think the Vortech unit is nice, I just don't like where the after cooler is located. But besides that, I don't like the idea of running engine oil through the blower. What makes the Vortech kit not slip belts? I already have the MMS 7.85" crank pulley and I'm ordering the SD-Concepts belt tensioner. Those upgrades should help with any belt slipping problems I might have. If I sell my P1SC kit I can wait a month and order ATI's new D1SC 8-rib kit that's coming out. Thanks for the info on the Vortech kit. Mike M. from NY runs that blower and puts down some kick *** ET's.
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From: Dublin, CA
Re: Best (low compression) ATI Blower Cam? With 8psi (3.85" pulley) and single intercooler on stock motor it was putting out 522rwhp.
It now has a forged LS6 bottom and stage 2 LS1 heads (A&A Stage 2 CNC blower heads). I had hopes for high boost with an 8.8:1CR. With 3.5" pulley and MMS bracket I have 8psi and slippage. Hopefully all those mods would add 150 or so rwhp, but so far it doesn't feel like it.
It now has a forged LS6 bottom and stage 2 LS1 heads (A&A Stage 2 CNC blower heads). I had hopes for high boost with an 8.8:1CR. With 3.5" pulley and MMS bracket I have 8psi and slippage. Hopefully all those mods would add 150 or so rwhp, but so far it doesn't feel like it.
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? So the 3.85" pulley with the MMS crank pulley only makes about 8#'s on a P1SC? That sucks...I think I'll be upgrading to a D1SC. I'll call ATI today. If they don't give me any concrete answers I might sell my ATI and looking into a turbo kit or a Vortech. i want about 10 to 12#'s but I don't want slipping.
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From: Columbia, MD
Re: Best (low compression) ATI Blower Cam?
I think the Vortech unit is nice, I just don't like where the after cooler is located. But besides that, I don't like the idea of running engine oil through the blower. What makes the Vortech kit not slip belts?
Here's an excerpt from a recent Modular Power magazine article (a mustang magazine), where they interviewed Vortech's founder and president Jim Middlebrook, regarding the engine oil-tap:
MP: Vortech superchargers utilize engine oil for lubrication, as opposed to self-contained supercharger lubrication. You obviously feel that engine oil is superior for supercharger lubrication.
Middlebrook: Yes, because engine oil provides faster warm-up and superior cooling to other types and is virtually maintenance free. In the self-contained units, nearly all the heat generated by the drive system and compressor to go into the charge air. The self-contained units can run very hot under high boost conditions when they are working hardest. In my view, only the superchargers attached to the engine’s lubricating and cooling system address these issues.
Re: Best (low compression) ATI Blower Cam?
I can get my hands on a 218/224 cam cheap. But I guess my new 218/228 115lsa cam will work as good. Packy...Do you like your P1SC? I was think about sell my *NEW* P1SC kit and order a D1SC kit from Tbryne this week. I bought the P1SC kit 8 months ago but haven't installed it yet, so it's new in the box. I guess if I got a good price I would think about selling the kit and order the D1SC 7# kit. I bought the extended warranty for my kit, so I have over 2 years left on it.
I think I'm gonna install my MMS blower cam first on my current setup and see if I like it. If I don't I'll call Comp Cams and have a customer blower cam made. I called them a few months ago and told them I wanted a 218/224 cam and they recommended to me a 218/224 .563/.568 115lsa cam. Plus it's got some killer lobes. If I don't like the stage 1 MMS blower cam I'll call Comp.
Packy, where does the P1SC blower start to make boost? Thanks.
Den
I think I'm gonna install my MMS blower cam first on my current setup and see if I like it. If I don't I'll call Comp Cams and have a customer blower cam made. I called them a few months ago and told them I wanted a 218/224 cam and they recommended to me a 218/224 .563/.568 115lsa cam. Plus it's got some killer lobes. If I don't like the stage 1 MMS blower cam I'll call Comp.
Packy, where does the P1SC blower start to make boost? Thanks.
Den
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From: Dublin, CA
Re: Best (low compression) ATI Blower Cam? 02BlackWS6 - That pulley I believe is their 7# pulley. On a stock longblock with single intercooler it was pumping 8#, and 522rwhp. I'm surprised to see built blown motors with close to the same rwhp numbers. I was hoping to have more like 650rwhp or more by adding stage 2 heads and cam and was targeting 12psi boost, or as much as I can pump into it.
The MMS bracket looks like this (it has belt debris on it from slippage): MMS pulley with belt slip debris
Here's another pic from the rear, I drilled across the pulley to stop belt slippage:
Drilled pulley & bracket
The MMS bracket looks like this (it has belt debris on it from slippage): MMS pulley with belt slip debris
Here's another pic from the rear, I drilled across the pulley to stop belt slippage:
Drilled pulley & bracket
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? Crunch, Thanks for the info on the Vortech kit. Does the LS1 kit also tap into our cooling system too? Or just the oil. I did a search on ATI's intake temps, and it seems like at full boost the temp only goes up about 20 to 30 degrees above ambient. Can the Vortech unit flow enough to handle a 370cid motor with ported 6.0 liter heads with headers?
Has any ATI people noticed high intake temps due to the fact it's self contained?
Packy, Wow thats good to hear that the P1SC unit makes boost early. I was alittle concerned that there was too much lag. I've thought about replaced the whole twin intercooler setup and run a single 2 or 3 core intercooler with a HKS adjustable BOV.
Den
Has any ATI people noticed high intake temps due to the fact it's self contained?
Packy, Wow thats good to hear that the P1SC unit makes boost early. I was alittle concerned that there was too much lag. I've thought about replaced the whole twin intercooler setup and run a single 2 or 3 core intercooler with a HKS adjustable BOV.
Den
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From: South Jersey
Re: Best (low compression) ATI Blower Cam? I just off the phone with Sd-Concepts about upgrading my ATI setup so I don't have any belt slipping problems. Let me tell you...them people had excellent customer service!!! I emailed them asking about their spring tensioner and they called me and explain everything about the setup. They got my business that's for sure. They have a 8-rib setup as well. And they do all the work then ship you back your bracket with the mods done. That's awesome support. If you ATI guys are having belt problems call SD-Concept, I'm sure they can help. Their number is: 401-732-4047.
Den
Den
