Truenotch's BEAMS AE86 racecar discussion

[Roman]

Sorry but yeah this is a sign that your engine is completely dead. 

It kicked the bucket

 

[cletus]

Does it have factory cams / valve springs? 

[Truenotch]

Yeah, the motor is 100% factory aside from being refreshed before it went in. 

 

[Stu]

Really weird one - is the face of the cam lobe true?

[Truenotch]

I haven't checked the cam properly but it seems fine. I'll be checking to make sure the cam is straight and true though. 

Current theory is Valve float causing a chatter at high RPM and it's fatigued over time. 

[tortron]

Flathead tappets do that when they stop rotating

Ling out

[Celica RA45]

check your collets on the valves and see if they havnt moved ,looking at that bucket looks like you can see the shim impression ,are you still using ti val;ves 

[Truenotch]

1 minute ago, Celica RA45 said:

check your collets on the valves and see if they havnt moved ,looking at that bucket looks like you can see the shim impression ,are you still using ti val;ves 

Thanks Glenn, I'll check all the collets. Still using Ti valves as it was just a standard motor that we refreshed. I'll be looking into steel valves for the next build. 

[Roman]

Hey @Celica RA45 here's a question...

Since the manual engines run TI valves which are obviously lighter, does this mean they run a softer valve spring as well? Compared to auto engine with steel valves.

[Celica RA45]

yes dave valve springs are different on redtop and black top manual or auto black top ,thats why the rev 500 higher cause of ti valves 

[Celica RA45]

so red top, grey top and auto beams uses same springs and valves 

[Celica RA45]

also markku we have seen the collets move down the valve with ti valves and regrab the stem in different places to hold on .the weak link is the exhaust valve ,they have a tendency to drop heads 

[Hyperblade]

Out of curiosity what rev limit were you running? Stock 7800?

[Truenotch]

3 hours ago, Hyperblade said:

Out of curiosity what rev limit were you running? Stock 7800?

The limit is set at 8000rpm on the link - so not too far off.  

[Hyperblade]

12 hours ago, Truenotch said:

The limit is set at 8000rpm on the link - so not too far off.  

That's concerning  I think i'll leave mine at 7800 then!

[Truenotch]

I wouldn't worry too much. I'm pretty certain my issues were caused by this abuse: 

 

[Hyperblade]

2 hours ago, Truenotch said:

I wouldn't worry too much. I'm pretty certain my issues were caused by this abuse: 

Wow, that would not have helped, impressive as it was! 

[Celica RA45]

well thats a silly thing to do wasnt it ,were you wearing beer glasses lol 

[Truenotch]

14 minutes ago, Celica RA45 said:

well thats a silly thing to do wasnt it ,were you wearing beer glasses lol 

... Yeah, I'd had a few beers... I'd only planned on doing a small skid but got carried away. 

Still, no regrets. 

[Hyperblade]

I'm looking at getting a quick release steering wheel adapter like yours, how are you finding yours? Any issues/things to watch out for? Quality holding up ok?