I've been waiting to ask this for ages but I have heaps of time to think about it, now just need some opinions...
I have decided that I want a Vortech Supercharger because my car is a daily driver but I want (quite a bit) more power than I have now. However, this will not be for ages (after I'm off my Ps) but I was wondering if I should bother doing anything else to the engine beforehand.
Will it be better to replace the heads, intake, cam, roller rockers etc to suit a supercharger? I read somewhere here that smaller heads and intake can actually be better for S/C... If aftermarket heads and intake is the go, can someone give me specifics? I know that I should do a mild rebuild as the engine has a few kms on it and may not like high psi. Also I was thinking about getting roller rockers within the next few weeks for a little boost, is this wise?
Just a few questions first to start me off. I've searched but the only similar thread I found was blueoval's asking a similar question.
Really depends on how much power you want. A Vortech pushing 10psi can get around 240rwkw on a fairly stock engine. Upgrading things like heads, intake, cam etc will give you more power but that money could be going towards the blower. If you do upgrade, you want to keep your compression down below 9.0:1 if possible and get a cam which has an exhaust bias.
Thanks for the reply once again EDXR8. I want a minimum of 250fwkw or 200rwkw but I will raise the psi once I'm ready for more power. Is 2031 cam S/C ready as well as 1.72 rockers? If that is all I'll need (besides springs, gaskets etc), I'll be pretty happy..
I have a (CAPA) Vortech kit sitting under my bed for my AU XR8 series 1. Waiting for tax return so I can change insurance and do a few things to the car before I install.
I am going to add an engine oil cooler, and another transmission oil cooler (auto). I also want to completely change the fluid in my auto to help it live a bit longer, but AU's didn't come with a dipstick/filler tube which is a bit frustrating...
I am not real excited about the FMU, and "chip" that comes with the CAPA kit. I am thinking about bigger injectors, MAF and a unichip tune, and ditching the water injection. Need to talk to a few people about that first though.
Imo depending on condition of engine and remember the block is NOT as strong as internals in good nick..With blown engines the indution is not as important as its being forced through anyway..But it will make a difference obvously..I would look out for some "lower compression" cylinder heads, or rebuild with some low comp pistons.. Inlet etc can be replaced anytime..The std maf maybe reaching its peak flow and peg out. There are aftermarket mafs made just for this to calibrate to your injectors as well....
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
24lb injectors come with the package but I think I may go for 30lb after that, depending on if I feel that it is enough power as it is. It also comes with a bigger MAF too (thank god) replacing my 55mm straw.
As for the rebuild I was thinking about getting ARP bolts through heads and bottom end. As for pistons and pushrods etc, I don't know, I am not after every last kw. Same goes for heads and intake, I know it will make more power but if what EDXR8 says is true, 240rwkw on a 'stock system' will be heaps, especially for a daily driver!
Thanks for all the input guys, really opens my eyes.
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