Smoke On Start Up And On Idle, Parts To Upgrade?

[altezzaclub]

Pro of this is after removing the "engine hat" you can do them all in under 1 minute as you don't have to remove the springs and retainers like the better stem seals.

 

hmm... I remember them on other engines I've worked on. The theory is that when the valve opens the o-ring goes down and touches the valve guide and the tiny drip of oil is taken off. So they don't slide on the valve stem and never wear out. Unfortunately they weren't very oil-proof and used to split!

 

So how do you change them without taking the springs off Taz?

[Taz_Rx]

 

Nah they're different to what you've described. The just slip over the very top of the valve stem above the collet. You can see where they're supposed to go in the above pic, which doesn't have any in it.

 

The idea of them is to simply stop oil running off the top of the retainers and running down the side of the stem into the guide. So you can understand why the newer ones which clip onto the top of the guides are soooo much better! :yes:

[jono1986]

Noticed you've said that before. Don't be tempted to build the 5k with a 3k head and run it NA until you fit a charger. The low compression will make it an absolute pig to drive. I've blown a cooler pipe off once and with no boost I reckon I had less power than a stocko 4kc.

 

You could however build the 5k bottom end and then just slap a stock 5k head on it with the hydros. Then over time you can collect some solid lifter conversion parts, and a charger and work your 3k head. Then just fit everything over a weekend or so and boost your way to work on Monday!!!

 

BTW, is the 3k a normal one or a big port? If its a big port then they have the shitty old valve stem seal o-rings. Pro of this is after removing the "engine hat" you can do them all in under 1 minute as you don't have to remove the springs and retainers like the better stem seals.

 

Cheers for that man definately a good idea, Could you run a supercharged 5k with hydros or not?

 

And nuh it's just a normal 3k head.

 

Halfway through this reply I looked at the 'how to build a tought k motor' and realised that I've put too much thinking into this, so here's a list of what I think I need for the standard charged setup:

 

Cam

Carby

3k Head (with porting and stuff done)

 

Actually that's about it, I was thinking of doing everything like oversized pistons, twin sidedraft webers, cam and everything else but after thinking about how much it's gonna cost I'd just do a 3sge beams conversion and get alot more power (and fuel injection).

 

Cheers for the help guys

 

Edit: Keep on reading your reply. It would obviously be a good idea to put a cam in before I chuck the engine in the car, what would be a good choice when it comes to supercharging? Cause I just want a nice power curve nothing in particular.

 

Edit 2: maybe a tighe 112 or 104?

Edited December 9, 2010 by jono1986

[Andy43]

We don't run any valve stem seals.

The 3k smokes a bit on start up and when you back off, but the valve guides get plent of lube.

[Evan G]

any reason for this? ^

[Taz_Rx]

Yeah you can run a charged 5k with hydros.

 

It would be a good idea to cam the 5k before dropping it in. If you want to charge it later on then don't go too big with your cam choice. You need to make the most of the S/C's low/mid power. If the cam is too big you'll have full boost, with cam lag. I used to have this problem with the CT12 and a camtech 609.

[Andy43]

We don't run any valve stem seals.

The 3k smokes a bit on start up and when you back off, but the valve guides get plent of lube.

 

 

Two reasons.

Keeps the valve guides well oiled less friction more smooth, as it illegal to run any form of top end lubricant in our class.

Main reason is makes you engine look stuffed to the people you are racing against, your seen as less of a threat, and as some lazy arse that couldn't be bothered rebuilding his engine.

Cheers

Andy

[Trev]

Two reasons.

Keeps the valve guides well oiled less friction more smooth, as it illegal to run any form of top end lubricant in our class.

Main reason is makes you engine look stuffed to the people you are racing against, your seen as less of a threat, and as some lazy arse that couldn't be bothered rebuilding his engine.

Cheers

Andy

 

Run it on 2 stroke.