Megasquirt Boost
#21
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Well it's official I am a plonker. The BOV spinning around isn't spinning around it's unscrewing. How do I know this ? Because I kept turning it one direction and it threw its contents across the garage spring and all. Dooooh
So tighten that all back up, refit all the pipes and hopefully problem solved. On a plus this will be the cheapest 5psi increase at 4500rpm I'll ever get...lol
Thanks for all your help guys
So tighten that all back up, refit all the pipes and hopefully problem solved. On a plus this will be the cheapest 5psi increase at 4500rpm I'll ever get...lol
Thanks for all your help guys
#23
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I've fastened the inlet manifold back pipe back on for the test and am just using the one bung with the valve now and the BOV is a recirculating one so it puts the air back in after the bung. It really is just leaking out the threads between the two barrels but I'll do another leak test once I put it all back together.
#28
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I'm taking it from the inlet mani to the megasquirt.
http://i1063.photobucket.com/albums/...0B95B788AB.jpg
http://i1063.photobucket.com/albums/...3C77485546.jpg
Found 3 leaks now, lessons still being learnt, when you buy a used turbo kit fit new clamps.....
Did a final leak at 10psi
http://youtu.be/Ly_67xxVJ5I
Just need to go out and log it again
http://i1063.photobucket.com/albums/...0B95B788AB.jpg
http://i1063.photobucket.com/albums/...3C77485546.jpg
Found 3 leaks now, lessons still being learnt, when you buy a used turbo kit fit new clamps.....
Did a final leak at 10psi
http://youtu.be/Ly_67xxVJ5I
Just need to go out and log it again
Last edited by HeresJohnny; 02-17-2014 at 01:50 AM.
#29
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Well I've logged it again and I'm still at 6psi at 4000 rpm from a standing start. Puzzled as I did have several leaks I've stopped. I've done a leak test up to 12psi and it does hold what I think is reasonably well. It drops to 8psi after about 60 seconds, there is air going somewhere but it sounds like it moving around the inlet manifold.
#30
Cpt. Slow
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,360
Total Cats: 1,184
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
And these are 3rd gear pulls? 4th would be better but we realize 1500-7000rpm in 4th gear is a little illegal.
1st and second happen so fast your turbo won't have time to build boost.
Have you tried running just waste gate pressure? Or a simple mbc?
1st and second happen so fast your turbo won't have time to build boost.
Have you tried running just waste gate pressure? Or a simple mbc?
#34
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Still on with the leak testing and I'm hoping you can clear up the how to do it right question. I'm just feeding 12psi of air in through the turbo outlet pipe and I've definitely no leaks up to the manifold intake after fixing 3. What I'm not sure about is what happens after that. Think I need an internal combustion engine lesson!!
Seems like the air filled up the space after that then leaked from the manifold breather pipe, then it stopped. The bung into the rocker cover doesn't seem really air sealed anyway?? Is that because air shouldn't be reaching there? I'm thinking all I need to test is before the TB.
The outcome is it loses the pressure but takes about 60seconds but there's no obvious hissing sound?
Done more logs above but there's no change as in I'm not hitting max boost at 3000 to 4000 rpm range.
Seems like the air filled up the space after that then leaked from the manifold breather pipe, then it stopped. The bung into the rocker cover doesn't seem really air sealed anyway?? Is that because air shouldn't be reaching there? I'm thinking all I need to test is before the TB.
The outcome is it loses the pressure but takes about 60seconds but there's no obvious hissing sound?
Done more logs above but there's no change as in I'm not hitting max boost at 3000 to 4000 rpm range.
#39
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
![](https://www.miataturbo.net/attachments/megasquirt-18/103651-megasquirt-boost-55011585-e7c0-46db-b4f1-3246841131e8.jpg?dateline=1392844876)
Arrow pointing almost to the wastgate feed.
The reply I got about the EBC from the retailer was:
It is normal for it to click when it is operating, however it does not need to be operating at all times. A value of zero duty in the duty table will kinda turn it off in areas where you do not need it to be operating.