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On valve settings - that 15 thou hurts my ears ! 15 thou hot !! man, 12 thou cold was bad enough !! In the end I did them my way ...4 thou hot both and that was a start up warm up again between either each cylinder or each bank, though run the risk of things getting tight and maybe a miss if let its temps get higher than half way on water temp gauge

steptoe wrote:On valve settings - that 15 thou hurts my ears ! 15 thou hot !! man, 12 thou cold was bad enough !! In the end I did them my way ...4 thou hot both and that was a start up warm up again between either each cylinder or each bank, though run the risk of things getting tight and maybe a miss if let its temps get higher than half way on water temp gauge

So my 0.015" is 15 thou... Are you suggesting that this is too big or small?
I do get a bit of a lifter/ rocker tap but just assumed this was normal.
Might play around with the clearances if you think I could go better, however the cam grinder did know the specs of the engine so would assume he could work out what was best

Cheers Cam

Brumby Kid wrote:So my 0.015" is 15 thou... Are you suggesting that this is too big or small?
I do get a bit of a lifter/ rocker tap but just assumed this was normal.
Might play around with the clearances if you think I could go better, however the cam grinder did know the specs of the engine so would assume he could work out what was best

Cheers Cam

15 thou hot would be waaay to big. I think 15 thou would be the cold setting. 1 thousandth of an inch is .025mm so 15 thou is nearly .4mm and if there was this much clearance at operating temp you'd have one hell of a racket!

1/1000th of an inch, is half of 2/1000th of an inch, every 1/1000th of an inch, gap gets bigger (by a bee's dick) so yeah kid in school that should be still fresh on fractions I reckon 15/1000 is a bit on the big gap side. Done my last ones at 6/1000 and 8 thou cold. Yet to drive it, started up, ran to op temp for HG retension and that's it so far.

I may need to correct 20/60 cam lift is 0.225" not 0.235" that I may have quoted, think that was rserved for the 16/56.

While on EA81 cam profiles, Willy has noticed the twin carb EA71 of 81,82 MY ran quite a big difference in its timing

steptoe wrote:so yeah kid in school that should be still fresh on fractions I reckon 15/1000 is a bit on the big gap side.

Oh shush you! I have a fancy calculator and deal with shares, investments, homeloans, and stats hahaha

What would your advice be? I don't want to burn out my valves. Would I be losing power as it is? (I hope so lol)
Will take a video on my big camera and upload a link for you guys to see what you think

Cheers Cam

yr12 maths , you might be perfect buyer for my 1200 page book intro to calculus

bet your calculator don't calculate dates entered and number of days between !

Hahaha I managed to escape calculus, no idea what it even is
Probably not, though it will calculate everything to do with your homeloan, stats, and draw graphs... if you know how lol

Alright so here is my dodgy video haha
It sounds a lot worse in the video than it actually is...
If you guys think 15 thou is too big, then what would you recommend? I don't want to wreck them.
Yes I know my oil can and breathers are dodgy but I don't know what else to do to avoid blow back/by (the normal one) and oil everywhere in the engine bay without the stock filter
https://www.youtube.com/watch?v=cWew4a1 ... e=youtu.be

Hmm well I can't hear much over that deep rumble so I guess that's a good sign If you set them to .015" hot I would have thought you wouldn't be able to hear yourself think...maybe your custom engine is bending the rules

I used the term chaff cutter in the search window top right of screen before I set my tappets

Nice air cleaner
I noticed the black rocker covers.............does this have hydraulic lifters?

Silverbullet wrote:Hmm well I can't hear much over that deep rumble so I guess that's a good sign If you set them to .015" hot I would have thought you wouldn't be able to hear yourself think...maybe your custom engine is bending the rules

Hahaha yeah it has a nice intake roar, exhaust rumble and then just generally a bit noisy thanks to alloy heads i'm told.
Going to borrow a Rode' mic from school and get some good engine and exhaust videos for you guys
With what was shaved off the heads it was a total PITA to squeeze the intake back on as it was suddenly slightly too long so this should also affect the pushrod length/ rockers and clearances. The pushrods are the original ones.

Nubaru wrote:I used the term chaff cutter in the search window top right of screen before I set my tappets

Hahaha you mean the classic Subaru sound?

Willy Fisterbottom wrote:Nice air cleaner
I noticed the black rocker covers.............does this have hydraulic lifters?

Why thankyou They were originally black and decided to repaint them black, now they are painted with mud
I don't actually remember whether they are solid or hydraulic
Will ask mud_king91 when he gets home tomorrow if he remembers from putting the pushrods in, I doubt the engine builder would remember.
Whats an easy way to tell?

Cheers Cam

What year model is your Brumby? Late models with black rocker covers and elecctronic dizzies had hydraulic lifters, you shouldn't adjust the rockers.......... If you put new solid lifters in it will be OK but cams are normaly made for solid or hydraulic lifters and you have to use the right lifters for the right cam.

I like the old school Ram Flo filter, I'm using one on my twins

1991 with electronic dizzy
The engine builder got new lifters from memory they might be solid, but dunno then sent the cam off to his favorite grinder, CamTech Cams.

Willy Fisterbottom wrote:What year model is your Brumby? Late models with black rocker covers and elecctronic dizzies had hydraulic lifters, you shouldn't adjust the rockers.......... If you put new solid lifters in it will be OK but cams are normaly made for solid or hydraulic lifters and you have to use the right lifters for the right cam.

When this goes through google translate from Japanese or American English it should not work into Australian English. My parts man has been with Subaru since he was a boy in shorts, and my first Brumby rolled onto our shores - has enough experience to suggest no EA81 came into Australian compliance with hydraulic lifters due to no parts listing.

One of us is a rumour monger , one of us is mistaken, pretty certain parts man is good

My API imported from Japan as just a used EA81 had hydraulic lifters and used mild steel push rods were one piece with ends shaped by force of some sort. Solids I have pulled apart all had aluminium with mild steel end caps.

My parts man from Penrith Subaru (going back to the 70's) told me otherwise. My N/A EA81 hydraulic lifter engine has the 3 piece pushrods and no lock tabs on the adjusters. My EA81T has the one piece pushrod and lock tabs on the rockers.

My pushrods have end caps that fall off and I can adjust the rockers

Steptoe what do you think about my valve clearance? What do you reccomend?

do what I did ....thought about it......the valves are only going to ride if there is no clearance and less than no clearance (tight) - correct ? Allowing for possibility that it may get hotter than normal op temp (gaps may get smaller or does metal expand when hot ? or expand enough to close the gaps ?) so, prepared for quick rocker adjusting I got engine to op temp, whipped the cover off and set them on one head to 4 thou each, cover back on, back to op temp, whipped other side off, did same . 14 years good enough trials ?

Last pair of heads just fitted up to B3 took numbers off tag off my 20/60 cam - 6 & 8 thou cold. Yet to drive it, still, noise amps in tin rockers

Ahh too easy, so no damage if too tight. Just going to have to work out what an appropriate size is now.

Better sit at the front of the class Cam. Did I say no damage if too tight ? If they are tight they will likely cause a miss, lower comp and maybe burn a valve. If their is a gap, surely some gap is not tight. Tight is no gap and riding on valve.