I'm running a 224/224/114/0.588 cam with ported 5.3 L heads and FLP long tubes in California. Not satisfied with 400 rwhp; I want to exceed 500.

I understand that the heads will have to be changed to lower compression, but I'd like to keep the cam and headers.

Which road to take: P1SC or D1SC or STS turbo or ??? California emissions approved is preferable (P1SC, right?) but not absolutely necessary.

Car details in sig... thanks in advance for any opinions.

Rich

I would like to know also. I've got a similar set-up.

AFAIK the only CARB approved FI kit is the P1SC. Ed (blown_vert) is running it with high compression heads and was around 500 RWHP. Dont know if his car will pass sniffer test however?

Check Sig.... I would say D-1SC with ATI new 8 rib and call it a day.

Are you guys stock compression?

If you are, then you could leave the heads and just tune around the compression.

My vote is of course the Vortech kit, pulleyed for 9 psi, and a dyno tune. Should be 500-550rwhp for an MN6.

PSJ, I'm ashamed to tell you that I don't know my compression, other than to say it's higher than stock with the 5.3 L heads.

What are arguments for the Vortech over the D1SC?

Thanks,

Rich

It takes more boost with base kit Vortech to make the same power output as a D-1SC procharger. People will tell u that procharger have problems with bracket flexing and belt slippage, but this is not true with the new ATI 8 rib setup using a ATI superdamper. If you want to upgrade and build your motor later the D-1SC will give u more power than a Base Vortech which is also more expensive than a Procharger. Procharger is placed low infront of the engine which increase the car stability due to lower center of gravity while vortech is installed on top of the engine. If you want to change spark plugs you will have to remove the aftercooler and headunit if you are running the Vortech to get to the spark plugs. Also Procharger head units run higher Stepup ratio which makes more boost faster in the RPM and they handle higher max impeller speeds which allow them to give u higher boost levels when maxed out. Im running 8psi and i see 3psi at 2K rpm and 5psi at 4K rpm and 8psi at 6400rpm due to the 4.10 step up ratio. If you look at a D-1SC graph compared to the vortech u will notice a big difference in power under the curve. The D-1SC is helping my car making 400rwtq at 3K rpm and 500rwtq at 4200 rpm. You can check the graph here when my car was stock VS now. http://www.msnusers.com/CarsRelatedG...oto&PhotoID=60

My 3 cents:

-Vortech stuff puts out consistent numbers
-Vortech does not slip, stronger brackets for one
-Good up to 600rwhp, 550rwhp for sure
-ATI higher step-up is a bad thing, can mean belt slippage
-ATI brackets have had flexing problems
-ATI P1SC kits seem to do well

Talk to Rick at Synergy motorsports in Fremont California.
He has a custom ATI kit that will blow away the base ati or vortech kit.
He can also tune the car for you as well.
You will have no problem acheiving 500rwhp with his setup.

He did a 370ci Camaro that now makes 670rwhp on 91 octane. Passess the sniffer as well, visual no, but that gives you an idea of what he can crank out for you.


37440 Centralmont Place Suite D
Fremont, CA 94536
Rick@synergymotorsports.net

510.SYNERGY 510.796.3749

Assuming your 5.3's are not milled, your compression is probably half a point higher... maybe 10.5:1? I would verify that.

... and I came across one thread that mentioned the STS kit won't fit if subframes are installed. I have double-diamond type SFCs. Anyone know for sure?

Thanks again...

you can keep 90% of your drivers side subframe and of course all of your passenger side.

i cut a small section out so I could run the sts pipe and will then weld the subframe back to the pipe which in turn will be welded to the car.

i will post pics when done. it will make sense when you see the pics.

If you piece your ATI kit together right you can get better components and the overall cost of the "kit" will be cheaper. Thats what I did... not to mention order the D1SC with the ATI 8 rib, or go SDCE *what I did*, and instead of a ATI alum bracket get a True Tech steel bracket for half the price of the ATI alum. Slippage and flexing solved.

Personally I would go with a ATI instead of Vortech.. any day of the week.

I do know that ATI is coming out with something else to solve belt slippage, not sure if its published yet, so Im not going to go any further then that. *gonna go check Prochargers site*.

The fastest stock internal car got there with a Vortech kit... 10.5.

The fastest stock cube, heads and cam setup got there with a Vortech kit, 10.2 or 10.3.

Can you tell me the fastest comparable ATI times?

lol, john, are ya a fan of vortech?

I'm a fan of vortech too.

I Bought a used vortech off ebay if that tells you my faith in the units

Procharger makes a nice headunit.. but the rest of the kit leaves some to be desired for the price The Synergy kit sounds similar to what i have reccomended a few times for the ati setup, using all good parts. I lookforward to seeing results from it.

Ryan

Thats exactly why I pieced my kit together.. Im not anti-vortech.... afterall I am going to use their Race BPV.

I don't think that the Vortech head units are the best bar none because I don't have that technical knowledge. But the kits overall work and again I ask for the ATI records for comparison. I think blackls1ta/mike did 10.9 stock motor with an ati.

OpticZ, of Modern Day Muscle Cars, ran 9.7, or 9.8, with stock cubes and the ATI D1.

Any Vortech blower's in the 9's on a Vette?

BTW - There are several tuner kits, which are cheaper than the stock ATI kits, and they are much more capable of putting out big numbers. As far as I know, they utilize the ATI head unit and they utilize a large front mount intercooler.

Not sure what the Vortech C5 records look like.

C5 Vortech has some issues. You can work them out tho.
The C5 ATI ECS/A&A kits seem to be more reliable.

Head units are comparable, but ATI gears chatter a lot.