Roughly what kind of gains would I see using this on a completely stock 305 with a 5 speed? It is going on a 89 rs. I plan on keeping the tbi and using an adapter plate and grinding down the raised ridge like part of the intake like I saw in another thread.

 

i read on other posts that u will see better gains with a weiand intake then u would with a performer rpm intake cant remember the particular name of the intake

 

from an intake swap you will see minimal gains. the real hindering parts of this engine are the camshaft, heads, and exhaust. now if those are done then an intake along with those will help...IMO.

 

The reason I was asking is cause I have 1 of these just laying around from a motor I built before. The difference is that was a fully built motor and this 1 is completely stock. I don't plan on doing anything crazy with this motor cause its just a 305. Just exhaust intake and cam. Maybe a pair of vortec heads. Ultimate plan is a lsx/t56 tt but that's around 5 years down the road. I just don't wanna get beat by a lady driving a mini van.

 

Just so you know, some of those minivans will outperform even a 4th gen! My mother-in-law had a Nissan Quest that easily took a Mustang GT, and we had 2 adults and 5 kids in the van!

You won't notice or feel anything with the Performer at all. Not worth the effort. And you mentioned Vortec heads - you'll need a Vortec intake manifold for those heads anyway - so you'd just be wasting your time.

AND - unless you can do it yourself, or know someone who can do it - swapping heads is going to mean all new custom chip tuning - so keep that in mind before considering head swaps on the TBI car. There's very little you can do on a TBI car without chip tuning - exhaust is about it, and maybe an LT1 cam - beyond that you cross the line into 'chipland'.

 

I've done quite a bit of reading on here before I even made my first post and I'm pretty sure I could burn chips. Probably stumble here and there. Even though I know I said I plan on swapping with something else I still like to learn how to do new things.

 

LSx being the key here.

If you were later on just going to swap in a 1st gen smallblock I'd say headers, full exhaust and intake will do quite a bit. Expect to find out that fuel pressure and the ROM used will be two other areas that must be covered to get the LO3 to work.

A camshaft does of course help, as the stock camshaft doesn't do much for performance.

With the exhaust covered you'd be able to see some minor gains from the intake as well. It is, as always, the combination of parts used.

If you're going to swap for an LSx in a few years, I'm not certain how much sense it will make to spend money on parts you can't use on the LS.

The fuelpump and some other stuff will work in a different engine just as well, but headers would not fit, and I'm not sure how useful for instance EBL would be on an LS engine (lack of experience with LSx engines on my behalf). Since I'm neither your wallet nor your conscience, I can only advise on what I would personally decide in your stead, which is to invest in a not that expensive set of headers (for instance hedman painted shorty's with a 3" Y pipe and a rattlecan with VHT high temp paint), a full 3" exhaust (since that can be used with the LSx as well), fuel pump and adjustable regulator, learn how to burn my own ROM's, pick up an affordable cam that does not have crazy amounts of lift (with the stock heads I'm told you're stuck with anything under .450 lift anyways) and fit the performer intake with an open element, and then just drive and enjoy it as it is, untill you swap in the LSx.