I have been running a Comptech kit for years and have reached a place where I'm looking at upgrading the blower. I recently picked up a motor with a fresh built/sleeved 9:1 comp bottom end and want to make use of it. So naturally I'm looking towards the 1500 to do the job. I want a blower capable of being efficient in the 500+ range. I know there is a couple guys that are running them, but I haven't been able to get any clarification on whats required to make them fit and work properly. I understand I'll need an upgraded mount plate from SOS for the different bolt pattern, but is there anything else... Or is it as simple as that? Hoping the guys that are running this can chime in and give me the scoop. Thanks much!

 

I believe you'll need a larger crank pulley to really push some PSI. You need to grind away some of the water pump, or was it the pulley...? Not really sure but I do recall other members saying this blower on an F20/F22 is near its surge limit.

Perhaps your best best, for reliability purposes, would be to get a N1200 oil feed, and have it rebuilt with upgraded bearings and seals. I would talk to Joey about what he did. Or, another alternative, if you want to really blow some dough, fab up a c38 blower. But that will require alot of engineering work. Even the TTS kits have issues apparently.

 

Thanks for the input. I recently found s2kadrenalins build thread to get some insight, and what a drag of a read that is, would make anyone want to quit, and unfortunately I can relate too well myself. Hopefully I’ll have better luck with this next motor and blower transition.

As far as the 1200 goes, is it upgradeable to flow more cfm to say 1500 standards down the road if I wish? I cant recall if say 928 or someone makes an upgraded impellor that flows better, or if that’s the 1220 I’m thinking of and the 1200 is already maxed. Obviously 9:1 compression isnt ideal for a Supercharger set up, it’s a bit low being more for Turbo, so I want to get the most cfm and efficiency I can from the right size blower. I will probably still continue to spray water/meth, if nothing else as a measure of cooling and safety.

 

best of luck on the new motor did your f22 let go? hows the emanage treating you? i would keep spraying the meth i can attest to its effectiveness i loose almost 1 point on afr without it running off the shelf windshield fluid i read s2kadrenalins post is very sad indeed looks like everyone goes 1200-1220 but try it would love to see this work for someone

 

Thanks. Yeah it looked like one of two things happened, either I had a serious ring land failure or I sucked in a sizable foreign object (possibly from the rebuilt SC) that didn’t agree with my bottom end. I havent torn down the motor or SC to confirm which, but I did look at the damage to the engine cylinders with a camera. It was a new replacement OEM f22 with only 22k on it, which I performed the install this spring. I put only 6k on it before this failure. Such a shame

Emanage overall works good, runs great, much like stock with the ID1000.

 

I will be following this

 

Man I have a 9.5:1 comp engine and I maxed the 1200 blower best I saw was 21psi and honestly the car did go like a bullet but down low the compression loss I feel was too much. I suppose if I went 10 or 10.5:1 I would have been much better.
Before I blew a headgasket via a bad rad cap, my engine was built for high comp n/a 13:1comp and on 10psi with the SOS kit down low went like a train compared to my 9.5:1 (changed pistons) on 21psi.
This was all done on e85 just incase anyone thinks I was crazy

All in all from my experience the car went MUCH better with the higher comp in the low to midrange. I didn't have big enough balls and bankroll to risk going higher psi on that compression. I was even thinking of boxing up my itb setup and using it with my SOS kit but lots of time and money involved to tune it right, so I scrapped that idea.

I am now finishing the fb stage 2 install, but I would love to see what route you go and how it all turns out. Goodluck hopefully some of my experiences can help you out.

Also forgot to mention don't let s2kadrenalin's experience deter you, there arent many competent tuners here in Australia. Also from what I heard and read on here the engine may also have been an issue. Feel for him though he went through hell with that car.

 

What was your max hp/trq end up being at 21psi and what rpm? Better yet do you happen to have a dyno sheet you can post? What size pulley config were you running to make that psi? I like the idea of running a more efficient higher comp motor like 10-11:1 as well, especially being a meth user lol, but for $3200 I couldn't pass up a complete F22 with a 0 mile built bottom end. Hopefully I wont be too disappointment with the performance. This is where I figured I'd need to be playing with the 1500 to more or less maximize what the motor can offer on pump gas. Thanks

 

Can someone enlighten me on this "compressor Serge" I've been hearing specific to the NV1500?

 

The compressor surge issue pertains to closed throttle and part throttle. Since the blower CFM is dictated by RPM of the crankshaft, unlike a turbo with exhaust spooling the turbo. The CFM flow of the N1500 is a lot higher during off throttle and high RPM. When you are wide open throttle and close the throttle blade, the impeller is still spinning at a high speed, if you do not have a big enough BOV the air will not be evacuated fast enough and the air from the blower will collide with the air not evacuated. Some say that the air coming back would be enough to put a large load to the impeller and possibly even stall the impeller and back spin it, but I can't see an impeller spinning 60000 rpm just stop and go the other way, especially since it's driven off the crankshaft, I could be wrong though. The same thing can happen if you are at high RPMs partial throttle, it is not moving enough air through the engine, but it is still producing a large amout of air from the blower and it has nowhere else to go.

Definitely looking forward to the outcome of this with the lower compression and the bigger blower. I've often thought about upping the CR on a blower motor and maybe run less boost or keeping it the same. Who know's maybe it would like it. Lol