78 2-Door Build Thread

[dubmc]

Probably had something to do with the vac leak, dude. Was it idling irregular?

well this is the thing...under load there sounds like there is a small air leak...but it doesn't hunt at idle and has been running good. i checked the exhaust and carb manifold and both were tight and have new gaskets (from the build)

last week i want to start the engine and it was on 3 cyl...i put new plugs in that i had and its been fine since.

today after not driving it for two days i went to repco, it was driving fine and then stuttered once or twice and lost power for 1 or 2 seconds...

i wonder if these two seperate issues are related at all?.....

tomorrow im going to try and source a new fitting for the vac and see if the air leak has gone and if it runs smoother

on another note i also changed the oil from genuine 5-30 vw oil to 10-40 full synthetic penrite oil as the lifters were getting noisy at high temperatures (i also have a set of new lifters waiting to go in)

any thoughts???........

[Preen59]

It should have nothing to do with your oil change.

Generally a vac leak will get better the more you open the throttle if it's only a small one, and it usually makes an engine stumble, not completely lose power.

Spray aerostart or start ya bastard around the manifold with the engine running. When you spray it over a spot where there's a vac leak, the engine RPM should increase..

These problems can be hard to diagnose over an internet forum.. It may not be anything to do with a vac leak at all. That's only a suggestion given that you had a loose fitting. Also, be sure to check your soft mounts.

You could always take it to a competent mechanic...

[mikinoz]

Save your money and buy exactly what you want, mate. Cheaping out will only have you spending more later on...

Amen brother!

[mikinoz]

matt had a set of cups but im pretty sure mick snatched em up, were goin cheap too.

check out wheel whores, vortex, import monster etc if you cant find a set in oz

They were cheap, and damaged. I spent $150 getting one straightened and rash removed and still have to give them a polish and remove all the crud. I was thinking of selling them but am now at a point where I won't get my money back for them.

Importing yourself from USA might be cheaper.

[dubmc]

replaced the vacuum fitting on the carb manifold today...

car is runnin OK but still something not 100%...either I'm to pedantic or if I have to take a stab at it, It could also be a timing issue...it hasn't dropped in power today whatsoever but it does just hestitate a little, almost as if the timing is slightly retard...

[GRN_VAGN]

replaced the vacuum fitting on the carb manifold today...

car is runnin OK but still something not 100%...either I'm to pedantic or if I have to take a stab at it, It could also be a timing issue...it hasn't dropped in power today whatsoever but it does just hestitate a little, almost as if the timing is slightly retard...

I get the same thing, no idea what it is. and im running a 100% stock engine.
Car just feels flat for a sec, then goes. its usually between idle and 2200rpm for me

[Jarred]

could be due to the advance module on the distributor. If it feels like a it's not getting as much advance as it should, maybe the vaccum operated advance isn't working.

I'd suggest looking at getting the dizzy recurved anyways, it gets rebuilt at the same time, and you wont have to run the advance mechanism afterwards (iirc). It was very resonably priced too, Pete has more info about it in his wreck to race car thread

hope that helps. :s

[dom123]

preeny has a duckbill for ya pm him!

[dubmc]

well the car is running ace now and is a completely different animal...

we did a bit of a tune-up yesterday arvo which involved replacing the points in the dizzy (they were rooted), advancing the timing further to 10 advance and advanced the cam gear all the way...

the result...a much more lively and torquie motor

was raining yesterday and it was now spinning thirds easily (even with quite expensive dunlop's on the front) and in the dry in now punches out of corners and can get quite messy, just the way i wanted it ha!

we just didn't really get a chance to play around with the engine since it had been on the road but it paid off and i think now i could take a couple seconds off my wakefield laptimes...

and i forgot to mention jrad that the dizzy has already been re-curved albeit a while ago now

[dubmc]

courtesty of james (waterboy).

i now have the duckbill on, i should take some photos.

[dubmc]

took a couple shot's of the car with the duckbill, initially i was a little undecided but after looking at it for a while it has grown on me...what you guys think?

also uploaded a couple pics of my cousins/mechanics/brainstrusts 75 beetle from wakefield.

please note the oil on the ground is from the old family commodore ha!

[Preen59]

I reckon a GLS chin spoiler would look heaps better with the chrome and no flares.. But that's just me.

replaced the vacuum fitting on the carb manifold today...

car is runnin OK but still something not 100%...either I'm to pedantic or if I have to take a stab at it, It could also be a timing issue...it hasn't dropped in power today whatsoever but it does just hestitate a little, almost as if the timing is slightly retard...

Hesitates is a very broad description. How much throttle input? At what RPM? Cruising? Accelerating?

Remember that you're running twin carbies, not fuel injection. It is probably a little over-carbed for your engine configuration, so you'll never have awesome, 100% smooth power down low. If you stand on it at 1500rpm in 4th or 5th gear the air speed will be snails pace and it will stumble like all ****.

[dubmc]

I reckon a GLS chin spoiler would look heaps better with the chrome and no flares.. But that's just me.



Hesitates is a very broad description. How much throttle input? At what RPM? Cruising? Accelerating?

Remember that you're running twin carbies, not fuel injection. It is probably a little over-carbed for your engine configuration, so you'll never have awesome, 100% smooth power down low. If you stand on it at 1500rpm in 4th or 5th gear the air speed will be snails pace and it will stumble like all ****.

yeah me too, but i've bought it now i guess i'll wait till snaps off or breaks lol i think this is a sh*t replica and is a little bigger than what it should be...

as for the perfomance issue, its all sorted now, we changed the points on the dizzy, checked the timing and advanced the cam gear and it runs ace.

yeah i had never drive twin carbs before, but i learnt on the first day you can't just stand on the throttle and expect instant response...

really happy with it at the moment, only thing to do soon is the clutch...then im going to the track again, think we're going eastern creek although i wouldn't mind going to wakefield again to see if i can improve my times...

[ffoff]

dub, I know a guy in canberra who has some ATS cups he's wanting to sell, not entirely sure on specs, but I can find out for you if you want?

[GRN_VAGN]

I reckon a GLS chin spoiler would look heaps better with the chrome and no flares.. But that's just me.

Gotta agree, it just doesnt look right
Maybe if you had black bumpers, then yes and GTi arches, they all seem to blend in together then,