93' Miata stolen and flipped build thread
#3803
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,204
Total Cats: 1,138
Ninja key makes a decent keychain bottle opener. That's about it. I also don't see why loosening the front cam cap isn't easier than using the above tool, especially because you've probably loosened it to get the old one out. Rest of those tools are invaluable. Rms and FMs especially. And the crank tool. OMG the crank tool. Although I've done long nose and short nose 1.6, na8 and NB, still have yet to use all three bolt patterns...
#3804
I've heard really mixed reviews on the ninja tool. Some can't live without it, others hate it. Figured I'd find thr answer for myself. If it doesn't work, it was cheap and its a great bottle opener as stated.
The crank tool and RM are two I'm really happy I spent money on. Not scared of that job now.
The crank tool and RM are two I'm really happy I spent money on. Not scared of that job now.
#3805
Just heard back from the machine shop after they hot tanked the head and did a leakdown test/inspection for damage.
First thing he says is, "boy you certainly got some heat into this sucker didn't yah!"
-minor warping on top and bottom of the head, not significant(at least not enough to cause a head gasket leak)
-leakage on both the intake and exhaust valves due to valve seat damage
He said it honestly wasn't terrible, and mostly all the damage was localized to the #1 cylinder valves.
So now the options I go through
Is inconel worth the extra money?
My shopping list in my head
Stainless supertech exhaust and intake valves
Light double springs
new valve stem seals
Spring retainers(not sure I want to spend the money on titanium)
What else am I missing here? I got a rough quote @ $400 for all the work.
Hornet what did your recent machine shop machine the valve seats to? 45-55 thousands?
First thing he says is, "boy you certainly got some heat into this sucker didn't yah!"
-minor warping on top and bottom of the head, not significant(at least not enough to cause a head gasket leak)
-leakage on both the intake and exhaust valves due to valve seat damage
He said it honestly wasn't terrible, and mostly all the damage was localized to the #1 cylinder valves.
So now the options I go through
Is inconel worth the extra money?
My shopping list in my head
Stainless supertech exhaust and intake valves
Light double springs
new valve stem seals
Spring retainers(not sure I want to spend the money on titanium)
What else am I missing here? I got a rough quote @ $400 for all the work.
Hornet what did your recent machine shop machine the valve seats to? 45-55 thousands?
#3806
They went to the fattest value in the book. 60 on the exhaust. I can't remember what it was on the intake. The new head is holding up great though. So nice to not worry about it.
I'm wondering if your #1 cylinder is lean? Maybe send off the injectors for cleaning/flow testing while you're down?
I'm wondering if your #1 cylinder is lean? Maybe send off the injectors for cleaning/flow testing while you're down?
#3807
They went to the fattest value in the book. 60 on the exhaust. I can't remember what it was on the intake. The new head is holding up great though. So nice to not worry about it.
I'm wondering if your #1 cylinder is lean? Maybe send off the injectors for cleaning/flow testing while you're down?
I'm wondering if your #1 cylinder is lean? Maybe send off the injectors for cleaning/flow testing while you're down?
60 on exhaust? Damn, well, if it works, it works.
Shop owner said, give me your specs, I'll do whatever you like as long as I don't think it is a poor choice.
#3810
That's what I'd do if done over again. I got an AEM Meth kit to deter anymore lean events. Will probably run mostly water through it for detonation reasons but will add some Meth to raise the octane a little as well.
Like you I'm going in both arms swinging this time.
#3814
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
...but probably still "better" than regular dinosaur juice. I still wants it tho.
#3816
Jeff, that sucks about your engine but it is good that you know it could be worse. Excited to see what you do.
#3820
Let us hope so Vlad, ended up spending more than I wanted to, but wanted to not worry in the future.
Going to take Hornet's advice and go for .060 seat thickness on the exhaust valves. Shoot for 74 lbs of spring pressure, but what I'm still unsure of is the intake valve seat width. Seem to have a hard time pulling up much info on how thick people are going on the intake side of the seat. After reading several of Emilio's posts on the subject, it sounds as if they go on the thick side on both intake and exhaust and have far fewer issues.
Figure 74-80 lbs will be good(with oem spring seats)for 20 psi of boost to retain enough spring pressure.
Going to take Hornet's advice and go for .060 seat thickness on the exhaust valves. Shoot for 74 lbs of spring pressure, but what I'm still unsure of is the intake valve seat width. Seem to have a hard time pulling up much info on how thick people are going on the intake side of the seat. After reading several of Emilio's posts on the subject, it sounds as if they go on the thick side on both intake and exhaust and have far fewer issues.
Figure 74-80 lbs will be good(with oem spring seats)for 20 psi of boost to retain enough spring pressure.