I have a quick question... i know there are threads like this a lot, but i wanted to see if anyone had a similar setup to the one I am getting, and what kind of numbers they are putting down...

My sig has my full exhaust setup, but besides that Im getting the following...

- A new motor with less than 10K miles on it, which is setup specifically to be run with a supercharger. It has a Lunati Cam, i dont have the specific specs yet.. im getting them later today, stock heads that are ported and flowed.. i dont have the flow numbers yet either, all forged internals, and it will be running at about a 9.5 to 1 CR. As far as the supercharger goes, i will be running a ATI P-1SC at 10lbs. of boost. The car will be dynotuned after the install to make sure its running correctly.

Can anyone give me a ball park estimate of where i will be at? Will i be over 600 HP at the crank?.. If anyone has an opinion or is running a setup like this i would love to hear from them.. THANKS

 

.. also bigger valves, roller rockers etc.. I will post a list of all the mods to the motor when i get it tonight..

 

Depending on the quality of the porting job and the cam choice, I'd say 600 fwhp is a pretty good goal. That's just over 500 or so at the wheels. Maybe you'll make a little more or a little less, but I think you're in the right ballpark with your guess.

Good luck and let us know how it works out.

 

Ok cool.. ultimately my goal would be 600 hp at the wheels.. but i dont know how much more that would take.. Hmm..

 

also another question besides my first one.. how accurate are ATI's power increase numbers?? .. cause i believe that they claim a P-1SC running at 10-12 lbs. will make 75-90% increase.. am i right with those claims or not?.. is that anywhere near what u really gain?

 

I would say you will be close to 475 rwhp to 500 rwhp. If you are looking for 600 rwhp then I would probably recommend a small shot of nitrous. If not you would be better off going with a bigger blower such as a D1SC or T-trim. Also is this car going to be a daily driver?

 

I guess you could say it will be a daily driver in that im not only taking it to the track.. i do have another car tho that i drive all week.. i take the TA out on the weekends.

 

Just curious. If you are not going to take your car to the track then why the need for 600 rwhp?

 

Oh maybe i wrote it wrong.. i AM taking the car to the track, but i meant that that is not my sole purpose for it. I will love to run it at the track, but also i like to have a lot of fun on the way there

 

Also another Q...
I was told that the P1SC might be a little small for the motor i am gonna run it with, that i might want to go with a D1SC... but, whats the real difference??.. If i am running at the same boost with either model, wont i be making the same power??.. the specs on them look almost the same.

 

No that is not correct. You will make more power at 12lbs of boost with a D1SC than if you were running the same boost with a P1SC. You are basically pushing the smaller blower out of its effiecinecy zone. Thus it is working alot harder than a bigger blower would at the same boost level.

 

Ok i see, i see... but how much difference are we talking here tho?? anything worth spending the extra money for a D1SC?? Besides, i thought that the normal boost range for a P1SC is 12-15lbs. anyway.. that wouldnt be running it out of its efficiency zone would it?? Wouldnt that only be if i were running like 18lbs of boost or something??
By the way, anyone know off the top of their head how much more they are compared to a P1SC?

 

With a built-low compression motor you will be lucky to see 12-15lbs of boost (probably will see 10-11 lbs of boost) out of a P1SC. A P1SC is rated at 1200 cfm while a D1SC is rated at 1400 cfm. IMO if you are building your motor for boost then you might as well spend the extra bucks and get the bigger blower.

 

Ok.. well maybe ill go with the D1SC then.. but what do u consider low compression?.. Im getting the engine built with 9.5 to 1 CR.. do u consider that low?? Geez... i cant even remember what the stock LT1's run at... 10.5 i think??

 

For your setup I would recommend going 9.1:1 compression. My feeling is you can always make compression up with more boost. Also a lower compression will help prevent detonation with pump gas.