I had my 118k miles 305 elky on the dyno today.. I was quite surprised at how well it performed.

I removed the comp. contr. carb+ distr., and added a rochester and a hei. i changed the timing curve, retarded the ignition to 36total at 3000rpm, new plugs. Restored the carburator. Added a performer intake, hooker super comp. headers with true duals and an h pipe in 2,5". Removed the ac as well. Larger airfilter as well.

Anyways, it dynoed in a 230hp/5000rpm and 425nm/3300rpm

i have stated earlier it was quite peppy for a 305, and I guess i was right. Pretty nice gains for such small mods. but the seat og the pants feel is equivalent of it. It is still a deadbeat below 3000rpm, but this engine still has stock heads and cam.

it's an 87 btw. stock hp is 160 ive been told.

just wanted to share with you that giving your old tired 305 a new lease on life on a budget is possible.

GREAT JOB HOPE YOU GET MANY MILES OUT OF IT:You_Rock:

whats the casting number on the block?

WOW sweet man! Those numbers looks great!

Well.. it's not really race winning horsepower. But it shows how easy it is to mod a chevrolet smallblock.

Does anybody know what the rwhp is for a standard 305 (lg4) engine from 87 is? Because this is the most interesting thing to know.. It dynoed 190 hp at the wheels.

I dont know the casting number but I will check for them tommorow. But what relavance does it have im curious?

i think the LG4 305 was rated at 145 hp w a 4bbl so your 190 figure seems high. Maybe somebody swapped in the H.O. 305 from the Monte Carlo SS (diff pistons, heads and cam for 180 hp) at some point?

http://www.chevyasylum.com/tech/L69vsLG4.html

Im pretty sure it has the original engine.. but i will check tommorow for engine id numbers

Im pretty sure it has the original engine.. but i will check tommorow for engine id numbers
I had an 83 elky with the 305 and traded it for an 87 model and the 87 would run circles around the 83 ,Don't know why because I always thought the 83 ran pretty good but there is a definate difference between the 2 Jim:texas: PS I don't rcall the gearing on the 83 but the 87 is a 2.73 rear end 3 speed