i was looking for all the free mods you can do to a carbed 305 to get easy hp

anyone know where a list is or have a list they can send me ?

I assume you're talking about your '89, which would have been converted from TBI, most likely.

There aren't any, really. The only one that comes to mind for a factory carbed car is advancing the base timing from factory specs. Since you had to put non-CC carb and ignition parts on yours (I'm assuming), then adjusting the timing should have been part of the conversion process. So, the only "free" part is really called "tuning".

There are some relatively inexpensive things, such as dual snorkel or open element air cleaner. See the tech articles for how to make a dual snorkel. You want to feed it cool air, so either factory-like ducts and scoops, or some home-made variety is in order. If you settle for an open element cleaner, that's the least expensive and easiest, but you'll be feeding the engine warm air from under the hood.

Sometimes a carb spacer helps, but that really depends upon your individual setup. About all you can say there is, try it - if it helps, keep it; if not, take it back off.

The biggest help to a carb system comes from a healthy ignition system and free-flowing exhaust. Good cam and heads follow closely behind. None of those are "free", but that's the way you have to go about it.

yeah i thought there might be a "free" mod list somewhere for carbed 305's well actually my engine is out of an 86 just like yours

what could i do to get it into the 250-300 hp range w/o nos or blower


i heard it can be done !


thanks for your info

What I did. It's in the sig above.

Camshaft and exhaust. Then the next restriction is the heads.

'




what kind of camshaft,exhaust, and heads ?


someone let me know

A cam with a duration @ .050" between 200-220 degrees will work well. Any brand of headers and a good cat-back for the exhaust. A worked over set of stockers will work well but the best would be L31 vortecs or World Products S/R 305 heads. A good Edelbrock intake would give you a nice increase too.

I have a Edelbrock Performer RPM intake,also theres a different cam already put into the engine too i dont know what kind and its new, i will find out next week when i go over and talk to the guy that is giving me the engine.. but he told me before and i just forgot it... i know its 20 more hp then stock.


Anyways do you have a website that i can look at that sells
L31 vortecs or World Products S/R 305 heads ?



thanks iroc22

also...look at the L98 Aluminium corvette heads...i hear that they are the best for the 305...they are lighter too....
DABE

Will someone tell me where i can order or get some heads from



maybe a junkyard...

http://www.sdpc2000.com/cart.asp?act...id=277&pid=147

or

http://www.sdpc2000.com/cart.asp?act...tart&catid=277

You need to have the max intake be 1.94 and max exhaust 1.5s...

DABE

Thanks DABE


/**You need to have the max intake be 1.94 and max exhaust 1.5s... **\





what does this mean ?




you rock thanks for helping me gain knowledge

that is the biggest intake and exhaust valves that the 305 can handle...you will have problems....im getting the L98s as soon as i get $$....thanks
DABE

*****if you go larger than 1.94 and 1.5 you will have problems*****...sorry...DABE

awesome thanks dabe !

You will not have problems going bigger than 1.94/1.5

Common myth #1: 2.02/1.60 valves do not fit on 305s.

Yes they do! its been done and will be done again. There's words goin around that shrouding is the next problem, but that's only prominent at lifts higher than .600". How many street cams go that high?

As for the L98 Aluminum head, they are ok but they require you to run external EGR and if you need to pass emissions or cant tune computers, then this is goin to be a huge hurtle. (Actually neither do the L31 Vortecs.) The L98 heads have bad intake flow. The S/R Torquers and Vortecs outflow them. And if you run the Aluminum heads, you'll have to get some flatop pistons because of the heat loss with aluminum heads to make up the power loss.

So the only real advantage to the L98 heads are the fact that u lose weight and they flow better than the stock 305 heads.

Thanks Iroc22