15psi will give approx a 100% power increase. Figure a good 355 will make 400rwhp, it in theory could make 800rwhp. figure 100rwhp for turning the blower and other ineffceincies, its very possible. I made 660rwhp on 12.5psi, but that was with a 383. however, it had very mild heads

 

If you stick with street tires, the stock clutch and rear end will hold up ok. As soon as you put sticky tires on it, I wouldn't count on the clutch or rear end lasting very long. What this illustrates is one of the major planning deficiencies when a "boost newbie" starts contemplating a project. A blower kit isn't cheap, but it isn't horribly expensive for all the power it promises. It's also easy to install. People who wouldn't even think about doing a heads/cam swap can bolt up a blower, no problem. But once you get beyond a low boost setup, the supporting parts needed become very costly. To make big hp, besides the blower, you need to upgrade the short block, fuel system, ignition, exhaust system, clutch or tranny (if it's an A4), driveshaft, and possibly the rear end if you plan to use sticky tires.

Here's my suggestions. Forget sticky tires unless you can afford to replace the clutch and rear end. The only clutch worth using is the Street Twin. The clutch and the rear end will set you back ~$3,500 dollars (for parts) and really blow your budget. Get the motor out and go through it: check the main bore alignment, the deck, etc. Install new rings and bearings, have the rods and crank inspected. If all is good, button it back up with a good set of blower pistons (JE is my preference) and good fasteners. Have an appropriate cam installed. Take the heads to a good porter and have some basic porting done along with a valve job and (at least) new high quality exhaust valves which really take a beating due to the heat under boost. Reassemble with springs and upgraded pushrods appropriate to your cam, roller rockers, etc. You will needsheaders if you don't already have them.

You have already spent $5-6,000. The rest of your $10K budget will go towards the SC and fuel system. I suggest the Acceleronics low-z converter box, a set of 72lb injectors, the Racetronix twin-in tank fuel pumps, and an AFPR. The stock lines will be fine. Then it will need to be tuned with the benefit of a wide-band AF ratio meter. You will be lucky to come in under $10K even with the basic apoproach I have mentioned. Good luck.

Rich

 

here would be my approach which is similar but may save some money in the long run and leaves you with alot more then building your own motor!, and It is highly recommeneded you perform the work yourself as having a car of that magnitude and power level, things will need to be regularly checked, serviced and worked on, and taking it to a shop everytime for any of these will add alot of money you have not budgeted for.

$3750.00 - 383 4 bolt nodular iron capped 4340 forged Eagle and SRP short block (this is outright no exchange so you can keep your stock block and rotating assembly in one piece for resale, and includes billet double roller timing set for use with electric waterpump, and your choice of camshaft, everything comes assembled)

$230.00 - Meziere Waterpump

$1350.00 - Trick Flow heads 195cc runners, 64cc chambers, thicker deck, SS valves and decent springs to handle the cam you'll want (again retaining stock heads on your motor for resale later)

$200.00 - gaskets (no need to unassemble stock motor)

$250.00 - LT4 Intake manifold (retain lt1 manifold for stock motor)

$500.00 - new canton oil pan, Waterpump housing, timing chain cover, rear main seal carrier and seal.

$350.00 - ATI balancer and hub (keyed) a must at this level of boost!

$320.00 - 58mm TB BBK or Holley add ~$50 for holley

this brings you to ~$6950 but you have a direct drop in replacement for your car and retain the stock motor for resale and can keep this motor meanign you did not really invest the money directly into your car but rather into a complete super high performance motor you can keep if you decide to sell the camaro.

this is how I would do it, and then add in the fuel system and Supercharger and raise your budget some. lol bottom line, if you skimp trying to get there, your going to end up doing some things twice which will end up costing more money then you had originally planned on, this way, at least you have the motor built for the power, and a spare.. and this motor is capable of making great power evcen without the power adder. adding the additional components a little bit later will be much easier as the foundation for your project will be setup to handle about anything you want to throw at it. maybe keeping the boost low until the fuel system can be upgraded properly (easy add on at a later date), for example.. thats just my way of thinking though, I would also recommend using the labor money to invest in some good tools instead and learn to work on the car yourself, after all thats an investment and not a one time expenditure with nothing tangible kept afterwards. anyways, just thinking out loud. oh and i priced these pretty solid so that work up is just about dead ***** on accurate!

Chris