Wakes01 wrote:
Wow I started a good old war, I reckon I'l Get it balanced. I've been given a number of a guy in Launceston.
pretty hard on cars and this one will be a weekend toy racer.
What pistons should I be getting? Will be going +.020.
I want it to make power. So I guess a new cam as well. I don't care if it Runs rough, it's a fun car an I can deal with that. I've read about 1.5 rockers is this a good idea? Aswell as New intake and carby. Been looking at exhausts on minisport Is 2" to big?
I'm plannin on doing it once and doing it right. Fire away.
getting it balanced would be a good idea
Yes hypertech pistons or GR`s hypertech pistons are the go i`d suggest,,, great value for money & very strong.
can i ask if you know if it`s a large journal crank & rods do you know???
easy to check if you have a look through the fuel-pump hole in the back side of the block (if the engine is still all together) because, if it is,,, those rods are pretty darn yukky , big heavy slabs of crap that are often all out of whack & end weights are all over the place,,, these are one con-rod to try to stay clear of if you want to have a quick reving "SMOOTH" well balanced mini engine... anyways, i could go on & on about them & how you can make them better & blah blah blah,,, but in my opinion it`s not worth the bother with them if you can avoid it... because it might pay to try to find some A+ rods , try Josh from mini imports, he may have a set of A+ rods that will be far stronger, lighter (not as OLD) & will balance up way way better.
If you`re keen for a bit of acceleration as a weekend racer type toy then a lighter flywheel is the go,,, many brands on the market & not very expensive these days either & good value for money to help your engine rev quicker
probably an orange clutch diaphram... if you want a quick weekend warrior type engine then the orange is pretty tough without killing your crank thrusts like a grey would,,, maybe a blue would do-->but fore how long? i`d go with an orange straight up personally (but it would totally depend on what grunt your new engine develops & how harsh you are with your clutch opperation)
i would (as i said earlier) fit a new harmonic balancer... the old ones are getting very much older & older by the minute & plenty of them are "Failing" ,,,rubber just does not last 40 years in this harsh mini engine environment,,, nearly all the 2nd hand ones i "used" to have here in stock from good 2nd hand engines are VERY PERISHED ... we fit the brand new MED ones on all our "go-fast" engines,,, or at the very least for the average roady a new std issue type.
yes some cyl head work is a must if you want some proper go-go,,, costs money & time & you will want to see someone Experienced with mini heads in particular for this job.
cam shaft is your choice ,,, but please remember that anything over 35/75-ish is going to need some more compression to get it to be used to it`s full potential & we (mini engines) can`t really run compression ratios much higher than 10.5:1 on our pump/road fuel,,, so be careful which cam you choose here,,, too big & you just won`t get to use it`s potential,,, come down a tad in cam choice & you`ll be far better off if you`re wanting to use fuel from normal service stations... a 30/70-ish (or max of 35/75-ish) is around a good area you should be choosing from for hotty road use (whatever brand/manufacturer you choose from)
& i say an "ish" after the cam degs i`ve listed as there are sooooo many camshaft grinders around & sooo many to choose from,,, i`m not even going to start on that """cam of worms"""
i`m funny sometimes hey?
"Cam of worms" ? ,,,, ah forget it
make sure you have everything inside your engine sorted out,,, don`t skimp on anything, , but at the same time you may not want to spend 500million dollars on the thing either.
& locktite every internal nut & bolt .
Just be sensible with everything,,, just like i said with cam choice,,, you don`t have to go huge... Aim to just get it reliable & smooth first-up,,, then go & enjoy it.
it`s not just my engines that i go on & on about boys & girls,,, but just imagine how many other peoples engines i`ve worked on over the last 40 years of doin this stuff...
like i said earlier,,, i could name a pile of people who have built engines them-selves, or had them built by other people/companies... & i`ve had the diss-pleasure of letting them know that i`m soooo sorry but i can`t "tune" that horrible vibration out of your mini engine.
some of these people are reading these pages,,, some don`t even know of this forums existance... but honestly... """THESE DAYS""" (not 30 years ago) but these days...-->
if you don`t have your rotating mass balanced then i think you`re silly
