What make s a Miata tick?

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eg8tuner
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What make s a Miata tick?

Postby eg8tuner » Mon Sep 16, 2013 10:44 am

and now for a bad punch line.... and bad rod bearing
Image
crank is fine found some other interesting things while in there. #2 was installed backward (did some scouring on the crank but we have seen worse. reassembled and going back in today. hope to be broken in and back to flogging in a week.
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
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Rocwandrer
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Re: What make s a Miata tick?

Postby Rocwandrer » Mon Sep 16, 2013 3:26 pm

I was sure this was going to be about not checking or changing the oil causing top end ticks. I didn't even notice the author until I opened it. No cautionary tale on the string of events that lead up to this (or at least where you think the oil went)?

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DM
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Re: What make s a Miata tick?

Postby DM » Mon Sep 16, 2013 3:57 pm

how many miles on the motor?
Dan

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eg8tuner
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Re: What make s a Miata tick?

Postby eg8tuner » Mon Sep 16, 2013 4:40 pm

around 100k.

short version of the story
while the head was off the #3 cylinder wall rusted up pretty bad. I honed it out as best I could but I think that I may have damaged the rings so either a bad oil ring or by pressurizing the crank case the oil is making its way into the intake under boost. (car smokes)

I had full oil when I started the morning. I was barely on the stick when I pulled off cause of the ticking.


all seems well now but only time will tell. looking for a spare 1.8 block or engine to build for the sole purposed of building it to take this kind of abuse and more.
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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eg8tuner
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Re: What make s a Miata tick?

Postby eg8tuner » Sat Sep 21, 2013 9:46 pm

so to continue with the this wasn't my fault part of the thread. (since the last motor i blew up was) it appears that after re assembly i am not building oil pressure. im going to test with an independent gauge tomorrow.

it appears if you spin BP motors past there factory red line a lot and produce additional power there powdered metal pump gears kind disintegrate. im hoping this is not the case since this would put the engine out of commission for the winter as i would fix this with money so that it will never happen again. ( but this kinda goes with the part were the engine was low but not out of oil when this happened)
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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Re: What make s a Miata tick?

Postby eg8tuner » Mon Sep 23, 2013 9:03 am

no oil pressure. pull motor again (only took 1.5 hrs). found the housing on the pump to have pretty bad wear. the gears were sitting about 1mm below flush and there was sever scratching on the back side. im no expert on oil pumps but im almost certain that that is a big enough gap that it cant seal properly and just was blowing back and chewing its self up. oil came out with a large amount of aluminum in it after less than 5 min run time.

pulled all bearing caps they are all still in good shape. just installing a new pump.
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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Re: What make s a Miata tick?

Postby eg8tuner » Thu Oct 24, 2013 10:43 am

IT LIVES!!!!!!!!!!!!!!!!! and it has never been this quiet. so i guess the oil pump has been dieing since Richard bought the car. has oil pressure gauge now. 40 psi start up 25 hot idle 30-40 driving
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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Re: What make s a Miata tick?

Postby eg8tuner » Mon Jan 13, 2014 10:11 pm

along the lines of wintah upgrades. im looking into replacing the worn and heavily beaten 96 motor with a 99 vvt motor. still a few questions to iron out but i think this will make the car more reliable and a better starting place for future mods
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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pdool09
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Re: What make s a Miata tick?

Postby pdool09 » Tue Jan 14, 2014 9:21 am

Cool beans
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Re: What make s a Miata tick?

Postby eg8tuner » Thu Feb 13, 2014 10:25 pm

so tomorrow is a big day in the life of the miata. im driving down to CT to pick up an 02 engine (better head and intake design with full vvt). the VVTuner, wiring and new wide band sensor have all ready arrived. the rebuild for the coming season should start sat (possibly friday night ). sunday im going to take a trip up to old town and pick up a few additional pieces and hope to have the car running again in a few weeks.
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read

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MR Chuck
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Re: What make s a Miata tick?

Postby MR Chuck » Fri Feb 14, 2014 8:02 am

sweet. Good to hear someone is making some progress!
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pdool09
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Re: What make s a Miata tick?

Postby pdool09 » Fri Feb 14, 2014 11:14 am

Sweet!
Patrick D
#173 2005 SMF Scion Tc
#113 2013 SM Scion FR-S
Sold 2013 VW Golf GTI
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rigby
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Re: What make s a Miata tick?

Postby rigby » Fri Feb 14, 2014 6:48 pm

Cool beans. Remember VVT is on intake cam only. Lots of other things about that engine that make it better, though.

I had a VVTuner for my 2001 SE at the end. I installed it after the season ended and it burned before anyone else got to play with it, but it works extremely well. Butt dyno sucks, but I can tell you that on dry pavement on RE11's I would hook up the clutch and essentially idle along. With the VVTuner off, planting the throttle resulted in bog. With the VVTuner on, planting the throttle resulted in wheel spin even with Torsen. (It was on a switch b/c it threw codes due to the variance in the expected and reported cam position and I wanted to be able to reset the code and have the light stay out for inspection purposes if needed). Talk to me if you want any input on it. I did have issues talking to it with a virtual serial port. You may want to find a laptop with a real serial port to use for tuning.

While you're working with the VVT engine, consider looking out for what they call the square top manifold, or doing some machining work. There's a lot of power to be had in just helping the flow into and out of that engine.
Veyron is to grand piano as Hennessey is to banging on pots and pans with a big stick.

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Rocwandrer
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Re: What make s a Miata tick?

Postby Rocwandrer » Fri Feb 14, 2014 7:40 pm

I think as a budget option, the gt2560 should really be an effective mod for getting air into the engine, complemented well by the spool improvement of vvt overlap control :D

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Re: What make s a Miata tick?

Postby eg8tuner » Tue Feb 18, 2014 11:19 pm

so updates on the project so far.got it home and found that the altenator brack on teh water pump was broken off and that they connector on the cam sensor was also snapped off. completely tore the motor down an installed water pump from old motor and teh new oil pump i had put on it too. timed everything back up and checked compression (by hand so i was expecting low) i only got a reading out of 1 cylinder (30 psi) i could feel air coming out of exhaust ports on comp stroke. heading to machine shop thursday for a full valve job.

also acquired all the marts to start building a new 3" down pipe.

i will be ordering two of the 22 pin weather pack fire wall connectors to rewire teh entire engine with next fall but for now i am going to use one to wire teh vvtuner through teh fire wall.
1996 Turbo Otter
#14 in honor of Eric
"Driving the Sonett is to driving my car as underwater tig welding on flammable gas tanks is to super gluing Popsicle sticks."~Richard
best thing I've ever heard/read


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