I'm thinking about replacing piston rings and valveseals on my 305. It smokes at startup but not while driving so I'm assuming the seals are pretty worn. Mileage is about 110 000.
How much power will I regain on having these changed... any guesses?

 

if you don't half *** it it'll make as much power as it ever did.

 

with 110,000 miles on it i would consider replacing the cam and lifters while you got it apart as well ........you may need to get it bored slightly to clean up the cylinders also ......

 

So basically you are saying, rebuild it?

 

mmmm well ...mmmm ...uh...yep ...LOL..

and then comes the delima why rebuild a 305 when you could find a 350 block cheap and just rebuild it so you dont have as much down time on your car (drive yours while rebuilding the 350) .....more cubes = more power..

 

Don't touch the shortblock if its good, and it sounds good because it is running. Just replace the valve seals if your feeling frisky, and don't like the startup smoke.

 

I'm with ME on this. Do a nice compression and leakdown test to get your bearings and go from there.

Genreal, why the cam and lifters change? I've seen plenty of roller set-ups go well past 200K.

 

this is true but why you already have it torn down it would make sense to change it out i would think just for peice of mind ...

 

Couldn't resist. Enjoy.

Inspect

Main Entry: in·spect
Pronunciation: in-'spekt
Function: verb
Etymology: Latin inspectus, past participle of inspicere, from in- + specere to look -- more at SPY
transitive senses
1 : to view closely in critical appraisal : look over
2 : to examine officially <inspects the barracks every Friday>
intransitive senses : to make an inspection
synonym see SCRUTINIZE
- in·spec·tive /-'spek-tiv/ adjective

Anywho, I wouldn't even go that far, do the tests and swap the seals.

 

LOL i cant agree with you more i just got ahead of myself here..oops

yes do as said above first and inspect and perform above metioned tests before tearing something apart that doesnt need to be ......

 

Sometimes I just can't help myself. At least you have a sense of humor!

 

I should have figured i can count on you to mess with me


hey i can take it as well as i can dish it ...LMAO

why go thru life bieng a prude when you can have so much fun

 

Don't get me wrong a 350 would really rock! ...but there just aint that much cash lying around, plus a seperate new engine would probably be double as expencive (if not even more) to get ahold of here in Finland... hey, If there was cash I'd buy a saleen s7!
Otherwise the car runs really great for pushing 15 I think. Never been driven in the winter and to my knowledge well maintained. Raced against a civic type r not so long ago and we were pretty equal in acclereration and it's (the civic) supposed to have 0-60 in like 7s so it's okay. Although I feel it lacks power in the low rpm:s...don't know why. If I don't give it enough gas it sometimes dies.
Think I'm just gonna replace the valve stuff and do a compression.

 

here's a pic of us love-birds

 

nice car man

 

on a stock car, your low-end should be the best part of the power band.

 

I mean in the absolute beginning of the rpm:s... when it reaches 3 - 4000 it's all good and that's around where our cars have their peak.

When I launch the car from stop and there's not enough throttel it dies and now I'm just talking about getting it gently into motion, not hard racing type accel. I can have less throttel on my 86 Galant and that's just a puny 2 liter. All I have to do is lift my foot off the clutch and it get's going just galantly

On my bird on the other hand I have to show it some lovin' and give it a littel flow of that sweet juice it so loves to guzzle. Is it supposed to be like this

Maybe I should also add that it's not entirely stock.... the chip has been fiddeld with and is of a tuned type, this was done by some company in the states before it was shipped over. Also it has no cat, but a straight pipe... plus the muffler has been gutted a bit to ease flow.

 

Sounds like you have bigger problems, like your car isn't running right. When is the last time you did a full tuneup?

 

Well alot of things have certainly been replaced. Like airfilter, gasfilter, oilfilter, oil, waterpump, sparkplugs, wires, cap and rotor.
In idle it runs smoothly, nothing seems wrong... except this low end power shortage when launching.
What do you mean with tuneup exactly? All I can think of that's left that could cause this are the wacuum hoses, which I know are getting atleast a bit worn. I've had it to a mechanic... of sorts. Although he's only been working as such for a couple of years, but he said it seems fine. But I myself am not so certain.
Can it have anything to do with bad valveseals?

 

Here's another pic of my beauty

 

check the fuel pressure..

a tpi should be a beast from 1500-3800

 

I suppose it's not running right then... but where is the fuelpump located? I know it's inside the gastank on some cars. What else could be wrong if not the pump?

 

your fuel pump is in the gas tank..

 

fuel gauge plugs into the fuel rail (near the injectors)

dont ask me to spell the name of the valve

 

Schrader valve.