Try swapping in a s5 upper manifold and make the VDI work. you'll get a few hps in the upper end at higher revs.



C

Leetheslacker suggested going turbo, would that work (my engine has 84k miels on it) ? Or if I wanted to go that route would the swap be better?



Not looking for massive power just something around, maybe a little more than that of a stock S4 turbo hp numbers. Just enough to have a little more fun.

Dont waste your time/money on the swap. You can get what you want out of being NA...



The route I would look at though is running individual throttle bodies with a standalone EMS. Headers, free flow exhaust, ud crank pulley and port match EVERYTHING (UIM, LIM, ENGINE, etc) you should make the power you want.



I've seen NA cars make over 200whp on stock ports with this work performed.

I would add, solid motormounts, true cold air with heatshielding tape, ultra stiff/solid tranny mounts and if you plan on drag racing you will have to weld reinforcements for the rear subframe where the front diff mount braket is attached or have a few spares on hand it will break,I have broke 3 till I welded up the one I got now. Also maybe a wet shot of NOS, and a digtal MSD 6.

thats the typical dream na build. emphasis on dream.



not saying it hasnt been done, and if i had money laying around i'd love to do it. but most people who dream up this setup either cant afford it, or dont wanna spend that much money to only end up at 200 when investing that money in a boosted application will be much more bang for your buck.



that said, do whatever you want. nothing beats the sound of a pissed off high revving na rotary with itbs.

So matching the STOCK S4 or S5 turbo's is not reasonable? https://www.nopistons.com/forums/pub...O_DIR#>/11.gif I getting a mixed message lol. I'm not looking to drag race, just enough power over stock to help in AutoX and possibly the track. https://www.nopistons.com/forums/pub...1047683473.gif

If your goal is road racing or auto-x.. NA is better and more linear - turbo is IMHO not as good for auto-x ...road racing is different, I prefer turbo there...



You can build the NA w/ the specs I mentioned earlier for under $5k... to do a legitimate na-turbo conversion will cost at least that for a reliable outcome, but typically more (mine ran up to $8k when all was done)...



the setup I mentioned actually ran 202whp w/ an s5 engine, but pulling off 170whp w/ a similar setup for a s4 is not impossible and i would think cheaper than an all out turbo swap.



Swapping the manifolds to put stock t2 parts to an NA is not reliable for racing...

Thanks for the advice hopefully I can atleast match the turbo and have around 180 flywheel hp.

you can turbo the na for under 2k and keep it reliable.



run stockish boost and keep the tune on the rich side. thats what im doing anyways, and its night and day between na and boosted.

What exactly would cost so much during all of this? You can easily make your own exhaust, even if buying in an RB header for a few hundred $. Get a few scrap UIM/LIM or whatever and port them good. Then portmatch everything, junk all emissions/unnecessary ****, sort a proper cold air feed, then all you really have to buy is new leads/plugs and an air filter and SAFC?



I want to do similar, but I don't mind ripping the lump apart and trying for a decent bridgeport too (I hope this is where the real gains can be had).



Anyone can get 300bhp turbo, but where's the fun in that? And the way I see it, might be wrong, but the turbo's alone are $500, intercooler $200, piping $100, proper downpipe/elbow, then you have all the complexities of mapping to deal with. I can't see how, for a reliable 200bhp @ the flywheel a turbo would be cheaper/easier.