305 specs

does anyone know the horse power that a stock 1968 chevy impala had. my friends think its some where around 250 to like 300 or sumthin. if anyone knows please tell.

Do you have the castings? i dont think its a 305 >>>307<<<<

let me know

thanks
Robert

307-200hp

ya 307 my fault

200 hp? aight thanks

http://www.55-57chevys.com/coccc/art...9/68asty1.html

shows some detail on a 68 big chev.

Let's see.... I had a 68 with a 307, a 68 with a 327, a 68 with a 396, a 68 chevelle with a 307 and a 68 camaro with a 210 hp 327. All were lacking in go except the 396.

im looking for a 307 if any one has one

[QUOTE]Originally posted by TearDrop
does anyone know the horse power that a stock 1968 chevy impala had. my friends think its some where around 250 to like 300 or sumthin. if anyone knows please tell. [/QU
OTE]

250- 6cyl 155 H,P.
307 v/8 200 H.P.
327 250H.P.
327 275H.P.
396 325 H.P.
427 385 H.P.
427 425 H.P.

:whacked: :whacked:

Depending on the year and model there are two compression ratios available but I just looked up the 1978 8.5 copression model and it is a 165 hp with a 2 barrel and the smog crap. I am pulling a 305 out of a car right now and am gonna see what I can make it pull hoping for 325 HP with under 600.00 I will post the results. Hope this helps. The 305 has great low end torque.

I had a quick 305 question: I'm new to this kind of engine and I have had a problem lately that my idle has been to high when the car is in drive and I'm sitting at a stop light or something like that. Today when I shut off the car it even chugged a little like there was still gas in the carb. It just recently started and I wasn't sure if the only way to adjust it was with the distributor or if there was an idle screw of some sort. Or maybe some other problem?? Any help would be kick ass.

Timing is off. Put a timing light on it or if you don't have one loosen the distrubutor hold down clamp and turn on way until your idleing comes down and retighten the hold down and take it for a spin.

Thanks, I'll give it a try but is there a reason why that would just all of a sudden happen like that? I kinda noticed the problem after I used some carb-cleaner, would that have anything to do with it also?

I'm going with my experience on my SB. Sometines when I step on it to hard, for some reason the hold down comes loose and the distributor turns and then I will have the same problem your having, engine racing and hard to shut off. There could be alot of different problems than what I mentioned but try that first.

About the hold down cap......I undid the 4 spring screws holding it down, but the cap doesn't move because it's in a like groove. Am I doing this right?

Quote:

---

Originally posted by 84RIDE
About the hold down cap......I undid the 4 spring screws holding it down, but the cap doesn't move because it's in a like groove. Am I doing this right?

---

It sounds like you loosened the distributor cap and not the hold down

Look under the distributor and their should be one maybe two bolts

look right where the distributer goes through the intake manifold, there is a fork lookin thing with a bolt on the top. its in a tight space.

Thanks for all the help, I found that bolt and I'm gonna give it a try, it is in a really tight spot. I'll let you guys know how it goes.

Alright I adjusted the timing, both retarding it and advancing it about 10 times and testing it, and the idle is fine when the car is in gear, but it still is high when the car is in park. Any other ideas what this could be? It's weird because if the idle is high when the car is in park sometimes if you just rev the engine up the idle will then go down to where it should be. It's almost like something is sticking, but i've checked and rechecked all the throttle cables and other parts of the carb and nothing is to tight. Not sure what to check for next.....

Alright maybe i'm being to broad here about the problem....I did hear a hissing noise coming from the engine when I turned off the car the other day. Could my high rpm's be a vacumm leak problem? Any other ideas on what to check. I adjusted the timing and for some reason the problem is there one day and gone the next????

I took the car in for a diagnostic check and it came back that I have a bad carb thermostat. Has anyone dealt with these before and if so how difficult is it to replace? I think I might just rebuild the whole carb...