79 400 worn out?

[Bleever]

UHHHHmmm. OK. I just did a compression test. I got 92-100-92-100, 105-105-100-95..... is this sucker worn out? since it's off season for me, I could goof around with this engine till spring, and come out of hibernation with a new attitude....opinions?

it was so guttless anyway, I was going to do the usual 351m-400 cam, intake, lifters, 4bbl upgrade....

next part of question.... would any of you just slap rings in this old work truck, and go?

 

[Bax]

Wow thats getting pretty down on compression. Looks like it is time to start thinking about a rebuild.

 

[5.0Flareside]

go .030 over... flat top pistons.. cam and if you can find em some cleveland heads.. and also a 4bbl intake and good 700ish CFM carb.. depending on how hot of a cam you have..

 

[DNFXDLI]

Give TMI a call and he will answer all your questions and give you great advice.

 

[UNRULEE]

Give TMI a call and he will answer all your questions and give you great advice.

x a bazillion. He's a god when it comes to 335 series motors, and from what I hear a nice guy as well.

 

[Mil1ion]

U
next part of question.... would any of you just slap rings in this old work truck, and go?

You can't do that.

as cylinders wear they don't wear perfectly round. that's they they get bored out ,to return them to a a round configuration

Some low or mid-milers get away with just a honing but hi-milers usually require a boring out,

Nice try though.

 

[LEB Ben]

x a bazillion. He's a god when it comes to 335 series motors, and from what I hear a nice guy as well.

Great guy...he's stopped to talk to me and advise me even though the money doesn't go his way.

UHHHHmmm. OK. I just did a compression test. I got 92-100-92-100, 105-105-100-95..... is this sucker worn out?

Getting a little worn, but I'd say it's far from dead. Compression is close to being withing 10% all the way around.

since it's off season for me, I could goof around with this engine till spring, and come out of hibernation with a new attitude....opinions??

Depends on how much coin you're willing to drop. Personally, if the engine is on it's downhill side, I'd rather do it all at once...and that can get pricey.

it was so guttless anyway, I was going to do the usual 351m-400 cam, intake, lifters, 4bbl upgrade....??

Don't forget a good timing set as well. But as mentioned earlier, I'd give TMI a call. Here again, depending on your budget, he'll advise you on the best way to go.

next part of question.... would any of you just slap rings in this old work truck, and go?

Nope

 

[bucks77ford]

Curious, have you checked the oil pressure with a gauge rather than using the stock setup and also, does it burn alot of oil?