94lt1m6

iTrader: (9)

I just got an 83 TA with a brand new 305. I put it in myself , and we all know that the 80' TA's with 305's put out about the same HP as a new 4cyl civic. I am going to build this **** out of it, but is 305ci just to little to get lots of power, or not a problem. Im lookin to get like min 500-600 hp.

Also im wanting to make it a really high reving motor, so can anyone link me to a cam that has like a at least an 8k redline?

LilSlo1

iTrader: (3)

350 blocks are still a dime a dozen. I suggest getting one if you can. although it is possible to make a 305 run good. The only draw backs are less cubes, and you are kinda restricted on valve size.

The first motor I modified was the stock TBI 305 in my 1992 Camaro. I got my hands on a older set of 305 heads (perimeter valve cover bolts), and I believe they had a slightly smaller chamber than the heads on my 305 TBi motor. Most likely the same thing you have on your 83. Anyways did a half *** port job to the heads in my garage, port matched the intake and exhaust ports to the gaskets I was going to use, smoothed out the bowls and chambers, stuffed a 1.94 intake valve in the head, and unshrouded the intake valve. Comp Cams 236/236 @ .050 .454/.454 llift hydraulic cam (biggest cam I could get that still required the stock diameter valve springs).
Weiand single plane X-celerator intake, Holley 650 double pumper. Proform 1.6 roller rockers. All of this on top of a 130,000 mile tired out stock 305.
4.10 Gear, 5 speed manual trans 3400 lb car went 13.0's on motor and 11.89 on a 150 shot.

You can put a stroker crank in a 305 block and make a 337 I believe.

94lt1m6

iTrader: (9)

damn sounds like you put alot of work into it. So im pretty much stuck in the perameters of there's no replacement for displacement phrase....isnt every small block the same, the only dif is the bore and stroke? so could i stroke the **** out of it, and bore it paper thin, and make a 406 or a 427?

whytryz28

iTrader: (28)

All small blocks are not created equally, the 305 block is not the same as a 350 block. You cant bore a 305 to much or you'll run right into the water passages, and your walls would be to thin for some real power.

Im not sure what magazine did it but they got around 425hp out of a stock 305 with a holley top end kit. Just go that route if you cant dish out some cash for a used 350 block. Or grab a 400 block and you can see sizes around 455 with sleeves.

NJSPDER

iTrader: (2)

it is like any other small block, a good cam/head/intake combo and you have it made. which 305 is it? LG4 or L69? the L69 has better heads and a little better cam stock, but if you are planning a build up that isn't very significant.
the biggest draw back to the stock 3rd gen and replacement 305's is that the cams are total jokes, many aren't even .400 lift at the valve. look into a performer/street dominator intake and a good cam that revs to around 5500, comp extreme energy or lunati voodoo cams are recomended since they have modern ramp designs that help build cyl pressure and allow you to avoid spending a bunch of cash and effort doing a head swap.

91Z28

Turbocharger(s).

ulakovic22

iTrader: (12)

H/C/I and then slap a single or twin turbo setup on it. You can spin it to the moon and make some really good power.

JAY ROD

iTrader: (1)

have you thought of selling the 305 since it is still good and trying to buy something like a 350/400 and starting from there?305 engines aren't really a good starting point.

fast

iTrader: (24)

unless you have no choice but to keep the 305 you shouldn't keep it
the small bore limits power
if you want to build something that is fun to drive and gets good mileage then it's not a terrible choice

note that Chevy High Performance magazine is doing an '84 Z28 atm, they did heads/cam/edelbrock headers and got around 200 rwhp (not bad for a 305 and CA emissions)

conventional wisdom would say 350 or bigger (383s are relatively cheap now)
big blocks fit in 3rd gens nicely too

94lt1m6

iTrader: (9)

Id love to get a 400 or bigger block, the only reason I would hessitate to getting rid of the 305 is that i put it in about 3 years ago, and only has a max of 50 miles on it to this date. Im not sure which engine it is, i got it from oreily's if id have to bet id say the LG4. I would love to put a big block in it, but arent they pretty expensive to modify? Turbos are a good idea. Does anyone think i could get my money back out of the engine if i decide to swap for a bigger block? It cost me somewhere in the neighborhood of $1,200 for the engine, and new parts.

68maro

yeah but for 1300 you could get a 300hp gm 350.

94lt1m6

iTrader: (9)

Where did you get that price at

68maro

check pace performance

CamaroKidZ28

imo, sell the 305 and put a 350 in it.. if im correct, youll be able to hit that 8k rpms you want a lot easier in a small block than a big block without damaging the block.

Black FormulaLs1

iTrader: (10)

you might want to check out www.GAFBA.com there is a member there who has done LOADS with a 305..getting it to run 12.0's all motor i beleive although i dont know his rpm's or what all was done to it..but it is Definately worth a look!!!

94lt1m6

iTrader: (9)

ok ill check it out. My gf's parents have an old caddy with i think a 472 BB in it. Could i rip that sucker out and build it? Someone told me that those caddy engines are **** to build and probly wouldnt even fit in my car is that true, or BS?

LilSlo1

iTrader: (3)

Safely you could bore it .060, but you still may have some cooling issues. But honestly what will that get you a 310 cube motor ? or a 347 if it has an arm in it.

As for selling the 305, good luck, I can't even give away the 2 I have. Nobody wants a 305 unless they are doing a stock engine swap.

If you really want to use your old 305, I'd put a stoker crank in it and bore it .060 over. Try to get 11 to 1 compression out if it unless its a track only car then go higher. Dart makes a nice Iron head that has a 49 cc chamber with 1.94/1.5 valves, this should help you get the 11 to 1 compression with flat top pistons, and make the engine a little more efficent with the smaller chamber. Put a roller cam in it, single plane intake and a 650 cfm carb on that you should have 325-375 horsepower for probably $ 2,000 if you do it yourself with exception of the machine work and block clearencing.

I'd personally get a 350 block and build that.

If you're interested and live close to me I have a used 350 short block for sale. It had a rod knock so it needs to get rebuilt. $ 150

JUICED96Z

iTrader: (2)

If people can get a four banger into the single digets you can make a 305 fast. Anything can be done with the right amount of $$$

1bdbrd

iTrader: (12)

Im willing to bet that its easier to get the 4 cylinder into the single digits than it is a 305. The biggest problem with the 305 is that its a long stroke small bore engine which limits the valve size and total airflow. Its wise just to sell it for what you can and get a 350.

LilSlo1

iTrader: (3)

That was kinda my point.

I highly doubt that.