Running a SC at max boost on a stock engine?, Why isnt anyone doing this yet?

After reading Rob!'s thread about hitting 750+whp on race gas and a 3mm headgasket it makes me wonder why nobody is running a SC application on a stock engine at max boost.

This has been brought up alot lately in this thread but still nobody has done it. Obviously the stock engine can handle 25+psi on a stock engine with or without a headgasket swap. Most SC kits cannot handle over 25psi. Im near my limit with the Nov1000 and personally, its not worth it for me or I would be doing it already.

The newer kits use a 1220/1220 SL blower (I think SOS, VORTEC, and CT Engineering all use this blower) Yet people are stopping at around the 13 psi area. Not sure if any of you know this but SOS has an option to sell a larger crank pulley that will net the 1220/1220SL blower more psi, a 3.0incher will net you 18psi (518135 has it) instead of 13. So basically the 1220SL maxes out at 18 psi. Pretty good compared to the 1000 that maxes out SAFELY at 12/13psi.

Also, what 518135 and myself did not know is that SOS also sells a 1200 blower upgrade. Its a larger blower than the 1220 and it can flow 100 more CFM at 22psi. (super high is you ask me).

I know most of you already are thinking "why is this idiot posting this information, we already know this!" But I just want to make it a little more public that these upgrades are available so maybe some of you guys will bite the bullet and push the limits!

i would love to see someone try that on a stock motor with q16.

Why are you posting this we already know that.

Just kidding...I'm kind of planning this for myself since I heard of the smaller crank pulley. I'm taking it a small step at a time since I don't have another engine sitting in my garage and this is a DD.

In a nutshell the only thing holding me back is the wife and my car is a DD. I'm keeping the car for awhile and plan on continuing with the SC for now so you may see some updates from me in the near future.

Thanks for mentioning the 1200 option. That seems the way to go...the 2000 may be too big.

i think it has to do with a conflict of interest. i switched back from my turbo setup to an SOS blower because i wanted simplicity. i also realized that moderate power gains were really all i was looking for. it seems that most people going the SC route are not trying for maximum peak numbers - so why bother using race gas with a blower?

there have been some enormously huge numbers floating around here on the boards - but that doesn't mean that making the most whp ever is going to make all of us happy. i am much more content making less power with my blower than i ever was making more with my turbo setup - the setup just didn't fit my taste.

something to think about

Good points. I don't plan on it getting so hopped up that it's all race gas setup.

what blower does krazik run in his race car?

didn't he also put down like 400 whp when people with the 12 psi pulley did the same? seems like running a lot more boost for no reason. not really worth the risk there. also the 600-700+ turbo'ed guys are all running race gas. but they can turn down the boost and run on pump if need be. if you have a scer car running race gas only and u run out u have to take off your pulley. seems like way more of a hassle to me.

its unfair to completely judge his car. that guy was on a dynojet. you hardly ever see CT/VT cars on dynojets. u always see the dynapack 450-500 dyno sheets.

also, i thoguht his was the 1220 SL, which is smaller then the 1220 non sl, whish is smaller then the 1200 that he shoulda bought. also, he was on a 9.8ish:1 built block.

i wanna see someone push the 1200 blower thats for sure

well got my 3.0 pulley then im done.honestly the ctsc with the 3.2 with 4.77's is a blast to drive few more ponies will just make my setup complete

I agree, its unfair to compare that engine. It is infact 9.8:1 at 18psi and a stock bore and stroke F20C engine, not a F22C...big difference right there. Its also a stock header/head/intake manifold and throttle body, not to mention the invidia 70mm header back with a V4 (which some people consider restrictive)

Alot of good points here... Some I already took into consideration...however, still...why hasnt anyone pushed the envelope yet? Seems to be the thing to do lately.

The SOS track car has 10.5/.8:1 with a 1200 blower at 17psi and made 450whp... Id say 500 is obtainable with a nice header and 22psi on race fuel.

What I want to see:
SOS kit with 1200 blower at 22psi on a F22C stock engine...Anyone willing to jump of that plank...?

^ how much is the blower upgrade??

My ex that is always in some kind of competition with me just bought a 2010 GTR Premium.

So I think I have to do just that.

You also have to think about the belt slip issues with vortech blowers.
I think someone had a SOS 16psi pulley with a built engine.. only made around 440whp? on King's Motorsports dyno i believe.

I'd give it a go if someone would lend me a spare F22C motor.

On a serious note...I'll keep slowly pushing the one I have. I'd have to have a second S2K before I went into an all race gas setup.

I just asked Chris...I'm interested if it makes sense for the $.

Your assumption that they all use the same blower is incorrect. Your assumption that the 1220SL maxes out at 18 psi in the S2000 is also suspect. Has anyone seen 16 or 17 psi much less 18psi with the 1220SL?

This is not your silly gauge readings but dyno readings for boost. Gauges are notorious for reading wrong.

There is a max boost with all of these centrifugal compressor superchargers used in s2000 applications somewhere less than the published factory psi numbers. To obtain max boost on our very efficient engines you need a charger that will move about 1400 to 1600 cubic feet per minute. Check out the Vortech V7 Ysi trim.

I ran a Vortech S trim all the way out to 53,000 impeller rpm and saw 17 psi. I developed a piston/ring failure on my stock block.

The only way to get it beyond there was to change the trim. Vortech offers a racing t-trim that improves efficiency nicely. I have seen 19 to 21 psi with the t-trim on my built engine. There are other upgrades for other brands.

Belt slip can be over come for the most part with specialty pulleys and belt dressings.

HTH

s.hasan546 - I think the upgrade if you already have a 1220sl blower is around the 1600 range, I might be wrong though....518135, chime in and post what SOS quoted you at for a 1200 blower upgrade with the hardware. Otherwise I think its 400 more when you buy the whole kit new...

CodyLX450 - Your ex has a GTR? Please post her name and number...if you do not mind.

EternalLx - If you can get me a name, breif desc. on the car, and a city where the car is from Ill be able to talk to King and get info about that particular build.

Sideways - Thanks for correcting me, I wasnt too sure about the blowers. I know for a fact the 1220sl maxes out at 18psi with the 3.0in and larger crank pulley. 518135 is running that on his F20C motor. All gauges are not correct. 518135 is running a tru-boost gauge/controller. WHere did you get the number for CFM? Thats a pretty large blower, would that even fit in the S2000 engine bay?

Also, Sideways I appreciate you jumping in on this, we all know that you know what your doing

Vortecs List and specs of blowers

Paxtons List and specs of blowers

looks like RAIN H8R wants to bite the bullet and push the limits!!! do it, do it! hehehe

i was thinking of maxing out a 1220sl w/ e85....

rain is using a novi 1000 like myself

hmm rain h8r im confused in what i want to do with my car. i wont hv the money to do a big build until the summer or even the winter afterwards.

I either wanna go big turbo and shoot for 500+ on an elt mani.

OR

Go with a 1200 bower on the sos kit with a built motor and max it out. try to get numbers like krazik or better.

Problem is turbo will always be easier to put out more power. Now the only thing is how much do i really wanna work on my car. i like the ease of a scer kit.

You cant just slap on a SC kit, max it out and see near 500whp. Thats not gonna happen. You would need headwork...so I think. Or at least a J's Header.

I agree, turbo is the easy way out...but...meh...why give into that?!

I have the SOS kit and am running the 3in charger pulley, stock crank pulley. I did the calculations a while back and found that if I run the car up a little pasy the 8k redline, that the charger is overspun, past the 53,000 rpm max it is supposed to be limited at. I measured 12 psi at 8200rpm on the dyno. Car made 415 wheel on a dynocom, which reads lower than the dynapack also in town.

The set up is great. I am always down for more, but my internals are stock. Im really not trying to damage anything, so wont go anymore for a while. I cant imagine the car with the 500 numbers turbo guys are pushing.

i kno that its not as simple....

im pricing out both options right now. mase kit v. sos kit with 1200 blower. its coming out to about the same price.

btw if i went sos i would be doing:

1200 blower
return line conversion
asura exhaust + header
SOS twin disk clutch
Laskey Head port + polish + upgraded valves, springs, and retainers.
2mm hg
Nitrous (small shot...)

I think its safe to say you would have alot of HP with that setup. But not a big fan of N20.

Not sure how you got those numbers. Which blower do you have? 1220?