DIY Turbo Discussion greddy on a 1.8? homebrew kit?
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250-300WHP Build

 
Old 04-08-2019, 10:09 AM
  #161  
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So wait... He wanted all this deleted? All this **** and now nothing? I was looking forward to seeing him "tune" it...
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Old 04-08-2019, 10:28 AM
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Originally Posted by LukeG View Post
You should read only for a solid year before you post here. Just remember, when people rip on you, it's because they care.
Haha ya I know. I read for 3 years before I even made an account and I had already built multiple turbo cars/snowmobiles before that.
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Old 04-08-2019, 10:40 AM
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Why the FVCK do snowmobiles cost so much? My buddies front end got a slight tree related kerfuffle and it is $8700 to repair it. My MSM was $7000 and it was in mint condition.
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Old 04-08-2019, 11:05 AM
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Originally Posted by Mudflap View Post
Why the FVCK do snowmobiles cost so much? My buddies front end got a slight tree related kerfuffle and it is $8700 to repair it. My MSM was $7000 and it was in mint condition.
That seems ridiculous and he should go to a different shop. I got my sled 2 years old with a turbo and tons of aftermarket stuff for $7000 and i could rebuild damn near the whole front of the sled for less than $1500 and thats if i straight up creamed a tree dead center.

Part of the reason repairs cost so much now though is that they are using more glue and composites to build the chassis instead of the older sleds that were all aluminum, steel and rivets.


Edit: also dont know how this relates to the thread
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Old 04-08-2019, 02:15 PM
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This thread is on borrowed time already... What does it matter....
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Old 04-11-2019, 09:33 AM
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He was ******* with everyone.
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Old 04-11-2019, 09:57 AM
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Old 05-26-2019, 02:21 PM
  #168  
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I'll just leave this here, I'm sure no one gives a **** but it means a lot to me




s


Main bearing clearance .0022" on all 5, rod clearance .0025" on all 4. .017" top ring gap and .020" second.

Head is still at the machine shop, I went with a full Viton set of valve stem seals from Supertech. I asked him to double check the valve guides since I've read there can be issues with these seals if the valve guides are loose or bent. I sold that shitty Exedy clutch and have a FM Stage II (13.45lb) happy meal on the way. Only other aftermarket gasket I'm using is a Cometic head gasket, everything else is OEM (also waiting on that stuff in the mail).
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Old 05-26-2019, 02:42 PM
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Personally I would go with OEM valve guide seals instead of Supertech.

--Ian
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Old 05-26-2019, 03:26 PM
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Originally Posted by codrus View Post
Personally I would go with OEM valve guide seals instead of Supertech.

--Ian
I ordered them from 5X Racing, hopefully they were a good batch. I already dropped them off at the machine shop so there's not much I can do at this point. If they end up leaking I'll change them with OEM, not very hard but certainly time consuming.

My thought process was that Viton is a lot more durable than EPDM or polyacrylic OEM seals. Savington and FAB both mentioned in this thread: https://www.miataturbo.net/engine-pe...e-seals-95854/ that the leaking occurring for some people is probably more due to more stem play than standard combined with already looser fitting Supertech stem seals. I was told by the machine shop that the valve guide bore to valve stem clearance was still at the tighter end of the factory spec, hence why I went ahead and got those seals.
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Old 06-13-2019, 04:15 AM
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This thread...oh man. I now understand why it was sticked.
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Old 06-13-2019, 08:44 AM
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Let's put this another way: There is not a single upside to the Supertech seals. Only potential downsides. Why anyone would buy them in the year 2019 after a crapload of posts about the problems with them, but no posts about problems with OEM seals, is truly mind-boggling.
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Old 07-05-2019, 09:43 PM
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Originally Posted by Xaendeau View Post
This thread...oh man. I now understand why it was sticked.
Going back to my first post (and the first ~3 pages for that matter) after spending countless hours and roughly $3,500 on just the long block, I can see why I got flamed so hard.

I publicly apologize for this entire thread, I did not know **** about anything and looking back I can't believe I thought any of that garbage would work for even 5 minutes.
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Old 07-05-2019, 09:45 PM
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Originally Posted by concealer404 View Post
Let's put this another way: There is not a single upside to the Supertech seals. Only potential downsides. Why anyone would buy them in the year 2019 after a crapload of posts about the problems with them, but no posts about problems with OEM seals, is truly mind-boggling.
I finally managed to get Volvo springs, and since the Supertech seals are probably going to cause issues I got a set of OEM seals to have the machine shop install along with the springs. I would've had them do it all at once with the rebuild but it was PITA to find these springs, gives me a chance to correct the stem seal situation as well.
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Old 07-05-2019, 10:16 PM
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And an updated build list, have to at least try and redeem myself. I have bumped up the power goal slightly, around 350whp is my goal with an EFR 6758 @15-20PSI and E85. I pulled a Getrag 260 out of an E30 from the other side of Houston ($160 score!) and have decided to do the KMiata swap instead of a built Miata transmission from Walter Motorsports. I am still using the 3.9 Torsen already in the car but with a welded ear/RX7 housing.

What I have:

Supertech 84mm 9.5:1cr Pistons
Wiseco NPR XX Rings (0.017" top end gap, 0.020" second end gap)
Eagle Rods
ACL STD Size Bearings (.0022" main clearance, .0025" rod clearance)
ARP Head and Main Studs
Cometic 84mm .040" MLS Head Gasket
Boundary S2 72 psi Oil Pump
ATI Damper w/ 4-tooth Trigger Wheel
Volvo 418737/VS855 Valve Springs (otherwise stock rebuilt BP6D head)
Gates 42134 Water Pump
Supermiata Coolant Reroute
Mishimoto Radiator and Fans
DW 1000cc Injectors
Radium Fuel Rail
Fuelab 515 FPR and AN Lines (converting to return style using evap line)
Walboro 255lph Fuel Pump
MSLabs MS3 Mini (01-05) ECU
ACDelco D585 Coils
NGK 4644 Plugs
Getrag 260
ACT BM11-HDG6 E46 Clutch Kit (returned the Happy Meal)

What I still need to get:

KMiata BP to Getrag 260 Conversion Kit (and various transmission seals)
KMiata PPF Delete Kit
Sadfab LS Ignition Coil Bracket + Wires
GM Flex Fuel Sensor
Kraken EFR Manifold and Downpipe
EFR 6758 (T25 IWG / 0.64A/R)
Trackspeed 4-port EFR BCS Kit
Turbosmart Dual Port EFR Wastegate Actuator
AEM UEGO Wideband
Full Race Billet EFR BOV Cover
Skunk2 Ultra IM and TB? (still deciding if it's worth an extra $600)
Mishimoto 2-port OCC
GTX PCV Valve

Still a lot of expensive stuff to buy I'm getting there. I hope this is a lot better than the crap I started this thread with. I started a new (much better paying) job recently so it should move a lot more quickly but we'll see how things turn out. Thanks to everyone who roasted my stupid ideas, I 100% deserved it and wouldn't have gotten to this point without it.

Last edited by achulz; 07-12-2019 at 09:21 PM.
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Old 07-06-2019, 11:53 AM
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Our little boy is growing up so fast! *wipes tear from eye*



Have a likecat.
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Old 07-06-2019, 12:15 PM
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Is the evap canister line too small of a diameter to be used as a return? That question was asked over in the original "Converting NB to return fuel style" thread but it was never answered.
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Old 07-06-2019, 12:30 PM
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Originally Posted by skylinecalvin View Post
Is the evap canister line too small of a diameter to be used as a return? That question was asked over in the original "Converting NB to return fuel style" thread but it was never answered.
I suspect it will produce undesirable fuel pressure effects (too high and inconsistent) fuel pressure at idle, because the return line is going to see almost the same flow as the feed line at that point.

People have done it and run the car, but AFAIK nobody has datalogged the fuel pressure.

--Ian
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Old 07-06-2019, 12:59 PM
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The answer is "depends." (mostly on the pump you're using.) The feed line has been shown to support well... a LOT of power and the evap line is only 1/16" smaller. (Granted it's pressurized, and the goal with return is to have as little pressure as possible) Yoooooj pump? Wouldn't try it. Stock or one of the "next size up?" Maybe.

I use it with no detectable ill effects. But i have a stock pump and as Ian mentioned, i haven't datalogged fuel pressure, nor will i.
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