and still be N/A?

 

Yup.

I know a guy pulling 315hp crank with a 305tbi.
But, most people here will tell you that its not possible.
So, dont get too discouraged.


Tunning, port and and valve job, full exhaust, 3:23 or 3.42 gears will get you decent performance. Dont need to bore it necesseraly.

(If you wanna get cocky, 125 shot will do the trick)

 

Easily.

RBob.

 

You'll need to dump the 187 casting heads for any reasonable power level.

 

I made 240 RWHP with stock 187 castings!

 

Dewey316 made 208 rwhp with stock 187 castings, cam swap, and exhaust on a 305, and ran 14.5.

Lo-tec ran 13.6 with a 193 casting Caddy LO5 engine that also had the cam swap + exhaust.

Reasonable power can be made with stock castings. More power can be made with ported heads.

 

The heads would be pretty far down on my list of mods too. Way after exhaust, cam, intake, and getting a 350.

Whats up with the influx of tuned port guys lately?

 

Holley suggests their four barrell/4 injector TBI supports 500 HP.

 

208rwhp is a bit away from 300hp like the original poster wants

Using a 350 is obviously going to get you closer to a 300hp goal. Anything beyond that will need new heads.

I dicked around with 187's before when I had a TBI car, I didnt get very far with those heads, ended up swapping for S/R 305 Torquers.

 

I know it is. But I was just shy of 240rwhp with the 416 heads, and the same cam. at 12% loss that is about 270 hp. Its getting closer to the 300hp mark, and I really don't have much money tied up in this, it is a pretty easy buildup.

 

thanks for all the info guys.

 

I was making 275 RWHP before bumping FP and EBL. Thats a stock short block 350 Xfire.

 

What kind of heads should I slap on my built 355 short block? I'm really don't have any idea what combo would work best with it.

 

What combo are you running now and what combo made 240 whp? Haven't heard much about your setup lately, kinda out of the loop

 

big flow heads may not be best for street driven application. especially TBI. cheap heads may cause other issues. i happen to have a professional engine builder as an aquaintance/business relationship. the latest heads coming from Edelbrock(cnc) are perfection. in his humble opinion having set up more than a couple engines. he is a total frame off restoration specialist. now again not the highest flow(rpm) but good velocity which means easier to tune.

chev vortec is another lower cost alternative.

 

Hell while we are talking about heads I can't wait to get mine back from the machine shop.Fully ported and polished 081's with a 3 angle valve job and 1.94 ,1.54 valves ,oh yeah good times lol these are gonna be great.