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-   -   Turbo Problems... (https://www.miataturbo.net/diy-turbo-discussion-14/turbo-problems-89261/)

noahthepilot 06-02-2016 09:16 PM

Turbo Problems...
 
Hey everyone! I just put a DIY turbo kit in my 97 Miata. I went with the Voodoo box (I know its crap but I got a good deal) and 305cc supra injectors. Im running a T25 Garret turbo with a custom stainless manifold and downpipe. After putting everything on and turning the car on it sounded great. Everything appeared to work but when I put any load on the car the boost gauge wouldn't move into positive pressure. I hooked the boost gauge to the intake manifold and put a T fitting and split it and ran the other end to the Voodoo Box. I thought it would be a boost leak so I checked my piping and everything was nice and snug. I was wondering if anyone else had a similar problem and figured it out.

18psi 06-02-2016 09:29 PM

yes

acedeuce802 06-02-2016 09:29 PM

Get a boost leak checker. Just because your hoses are tight doesn't mean you don't have a leak.

You either have a boost leak, a leak at the boost gauge (still a boost leak), or a junk turbo. Do you know the condition of the turbo?

How's the condition of the engine otherwise? Any issues or maintenance done recently?

Savington 06-02-2016 09:33 PM

WG isn't closing or you have a boost leak. I'm assuming you've taken the most cursory of diagnostic steps (i.e. "does turbo spin") before posting a thread here.

noahthepilot 06-02-2016 09:35 PM

I had the turbo looked at by a professional and he said it was good to go. I also rebuilt the engine in the Miata so it has all new internals. Where would I get a boost leak checker?



Quote:

Originally Posted by acedeuce802 (Post 1336146)
Get a boost leak checker. Just because your hoses are tight doesn't mean you don't have a leak.

You either have a boost leak, a leak at the boost gauge (still a boost leak), or a junk turbo. Do you know the condition of the turbo?

How's the condition of the engine otherwise? Any issues or maintenance done recently?


noahthepilot 06-02-2016 09:39 PM

I check the WG and yes the turbo does spin lol.

Quote:

Originally Posted by Savington (Post 1336147)
WG isn't closing or you have a boost leak. I'm assuming you've taken the most cursory of diagnostic steps (i.e. "does turbo spin") before posting a thread here.


CalebMars 06-02-2016 09:41 PM

https://www.google.com/#q=boost+leak+checker. I'm a wizard, I know.

sixshooter 06-03-2016 07:26 PM

Quote:

Originally Posted by CalebMars (Post 1336150)

Please try to be nicer to the new guy.

I got mine here: Boost leak checker

stefanst 06-03-2016 08:00 PM

Homedepot high HP turbo accessories:

Oatey 2 in. Gripper Mechanical Plastic Test Plug-33401 - The Home Depot

borka 06-03-2016 08:11 PM

do you hear the turbo spooling when you floor it? do you feel any power gains in the car?

or it simply doesnt boost and no added power and turbo noises?

noahthepilot 06-03-2016 08:19 PM

honestly I haven't floored it because I figured out the BOV I bought wasn't working so I took that off and have stopped until I get one. but I did bring it up to around 2000 rpm and didn't really hear anything. I made sure to let the throttle down slowly so that no damage was done to the turbo after I didn't hear the BOV. Once I get I new BOV i'll update the thread and let you guys know whats up. Thank you all so much for your help!


Quote:

Originally Posted by borka (Post 1336372)
do you hear the turbo spooling when you floor it? do you feel any power gains in the car?

or it simply doesnt boost and no added power and turbo noises?


ryansmoneypit 06-03-2016 09:42 PM

Wait, you only took it to 2 k ? Well that's probably your problem.

borka 06-03-2016 11:06 PM

Quote:

Originally Posted by noahthepilot (Post 1336373)
honestly I haven't floored it because I figured out the BOV I bought wasn't working so I took that off and have stopped until I get one. but I did bring it up to around 2000 rpm and didn't really hear anything. I made sure to let the throttle down slowly so that no damage was done to the turbo after I didn't hear the BOV. Once I get I new BOV i'll update the thread and let you guys know whats up. Thank you all so much for your help!

Well, you won't get any boost feathering the throttle at 2k, you're not supposed to be in boost until you floor it at 3k rpm.

Be a man, floor it. (As long as tune is decent).

Not saying take it to red line, but floor it from 3 to 4k rpm and you will see if you are making boost.

Your bov might be fine, you will never hear it feathering throttle at 2k.

Stop granny shifting and start double clutching lol

ryansmoneypit 06-03-2016 11:09 PM

Double clutching? What the hell are you driving, an 18 speed Kenworth?

borka 06-03-2016 11:18 PM

Quote:

Originally Posted by ryansmoneypit (Post 1336387)
Double clutching? What the hell are you driving, an 18 speed Kenworth?


ryansmoneypit 06-04-2016 07:23 AM

Hahah, I should have known.!

Chiburbian 06-04-2016 05:04 PM

Quote:

Originally Posted by noahthepilot (Post 1336373)
honestly I haven't floored it because I figured out the BOV I bought wasn't working so I took that off and have stopped until I get one. but I did bring it up to around 2000 rpm and didn't really hear anything. I made sure to let the throttle down slowly so that no damage was done to the turbo after I didn't hear the BOV. Once I get I new BOV i'll update the thread and let you guys know whats up. Thank you all so much for your help!

Really, really dumb question here but... Did you hook up the vacuum line to the BOV? The right port of the BOV? How you doing the BOV is not working?

4gordeev 06-07-2016 07:40 AM

Were you actually driving when you brought it up to 2k or just sitting reving in the driveway? You aint gonna build boost with no load...

Wingman703 06-08-2016 12:36 AM

Quote:

Originally Posted by 4gordeev (Post 1336891)
You aint gonna build boost with no load...

What does load have to do with anything? The engine is still putting out exhaust gasses and spinning the turbines, load or no load.

4gordeev 06-08-2016 06:37 AM

Quote:

Originally Posted by Wingman703 (Post 1337093)
What does load have to do with anything? The engine is still putting out exhaust gasses and spinning the turbines, load or no load.

Turbo spinning doesn't necessarily mean its making pressure above atmospheric. Your fuel map depends on load and unless you have a hell of an inefficient system reving it in neutral will not flow enough exhaust gasses for it to build any boost. That's why anti-lag systems were invented.


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