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Subaru Brat ea82 turbo bastard project


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70 replies to this topic

#26 86BRATMAN

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Posted 11 May 2014 - 12:58 PM

Damn this thing brings back memories. Do her justice, this brat is a piece of history here.

#27 cookiemonster131

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Posted 13 May 2014 - 08:36 PM

OK guys sorry for the lack of updates, the brat is here and running. I drained the tank and fixed the gas gauge sending unit and replaced the plugs. the care fired up today and pulled in and out of the garage. I am back at it tomorrow and will snap some pics



#28 cookiemonster131

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Posted 14 May 2014 - 08:52 PM

Started looking around and realized they had a shitty Japanese generic pump under the hood trying to PULL fuel and then under the truck they had a generic carb pump at the tank PUSHING....
 
 
 
 
 
 
 
 
ridiculous
 
 
 
 
 
Installed a stock XT turbo pump back at the tank and replaced all of the rubber lines and filter
 
 
 
 
 
 
 
 
Got the BRAT running much better but with the narrowband O2 I just cant tune it that well. 
 
 
 
 
 
I got it running well enough to drive it about 10 miles without any trouble... 
 
 
 
 
 
More progress when the Wideband arrives!


#29 cookiemonster131

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Posted 21 May 2014 - 07:52 AM

alright so riding around town I had an oil leak from the oil pump dripping on the exhaust and on the timing belt. So I pulled the radiator, having it cleaned and boiled, pulled the pulleys timing belts and oil pump... the oil pump had tons of play in the shaft, about 1/2 up and down movement in the cam gear...

 

headed to the junkyard and pulled the only ea82 oil pump I could find. Made it home late yesterday ate some dinner and went to rebuilding.

 

All is well now but I think I got the mickey mouse gasket out of alignment so I will order a  new one today and change it next week. Truck is back running and hopefully next week I can get it tuned better.

 

 

 


Edited by cookiemonster131, 21 May 2014 - 07:54 AM.


#30 wagonist

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Posted 21 May 2014 - 05:42 PM

Why is the fuel system so ridiculous to you?

The fuel pump under the bonnet looks like an EA82 type external pump anyway, which is more than adequate.

It just depends whether the pump under the back can keep the feed up to it. Which considering that one is pushing against a vacuum will help.

And doing it this way means that the fuel line sizes didn't need to be upgraded so badly.

The EA82 EFI engines have a bigger fuel line than the carb version.



#31 turbosubarubrat

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Posted 21 May 2014 - 05:50 PM

The black one looks like the same exact pump on my hatch its only meant for a  carb system.



#32 cookiemonster131

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Posted 21 May 2014 - 06:50 PM

Wagonist it is ridiculous to me because electric pumps DO NOT PULL, plain and simple reason for them to fail

 

As for the black pump being a carb pump I am aware and that is why it is not on the truck anymore.

 

The fuel system was all revamped and working properly now by replacing all of the rubber lines with proper size and rating for fuel injection and a 70-90 lb XT ea82t pump under the pump within 12" of the fuel tank. Now I have 80lb of pressure under the hood with no strain on the system.

 

Onto to bigger and better things. the radiator is rebuilt and back and the new mickey mouse gasket should be waiting on me when I return from a trip this weekend.

 

More progress more progress

 

PS: got a bitchin original Clarion radio yesterday and a homemade pushbar style bumper yesterday that I will modify to run on the brat, I think... :-)



#33 cookiemonster131

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Posted 22 May 2014 - 08:02 AM

got the radiator back yesterday and it is good, flushed, and tested.

 

Waiting on my mickey mouse seal and hopefully put it in the beginning of next week and get this ready for paint



#34 coxy

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Posted 24 May 2014 - 05:55 PM

Cookie Monster some electric pumps do actually pull fuel such as early MY series factory pumps that live under the Hood.



#35 two85s

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Posted 24 May 2014 - 06:52 PM

Looks like a fun project.  Good luck and keep posting how it comes together,  Aaron



#36 cubastreet

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Posted 26 May 2014 - 02:52 AM

That low pressure/ high pressure pump setup is pretty common, with a surge tank added it's an ideal setup. I don't think the tank is well baffled which is fine when running a carb but can cause problems with efi when you need constant fuel pressure.

#37 cookiemonster131

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Posted 27 May 2014 - 08:51 AM

Never the less the fuel system is fixed the most efficient way possible and is doing well.

 

new mickey mouse seal is due to land today and I will tear back into this BRAT this evening.



#38 cookiemonster131

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Posted 27 May 2014 - 07:57 PM

 

got the mickey mouse seal replaced and back together in about 20 minutes. no leaks now so i will throw the cooling system back in it tomorrow.



#39 cookiemonster131

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Posted 29 May 2014 - 07:26 AM

oil pump seals replaced and running great now. radiator cleaned and cooling great. tuning more today then starting body work this weekend and next, paint soon!



#40 RustyBrat

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Posted 29 May 2014 - 07:52 PM

we want videos!



#41 cookiemonster131

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Posted 29 May 2014 - 08:03 PM

no tuning today only bodywork. I will do my best to get a video soon



#42 cookiemonster131

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Posted 04 June 2014 - 08:35 AM

spent the past few days stud gunning and body working the passenger side rear bedside. about time for paint and such



#43 wagonist

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Posted 05 June 2014 - 07:40 PM

Wagonist it is ridiculous to me because electric pumps DO NOT PULL, plain and simple reason for them to fail

 

As for the black pump being a carb pump I am aware and that is why it is not on the truck anymore.

 

The fuel system was all revamped and working properly now by replacing all of the rubber lines with proper size and rating for fuel injection and a 70-90 lb XT ea82t pump under the pump within 12" of the fuel tank. Now I have 80lb of pressure under the hood with no strain on the system.

 

Onto to bigger and better things. the radiator is rebuilt and back and the new mickey mouse gasket should be waiting on me when I return from a trip this weekend.

 

More progress more progress

 

PS: got a bitchin original Clarion radio yesterday and a homemade pushbar style bumper yesterday that I will modify to run on the brat, I think... :-)

EFI fuel pumps do not pull, that's why the EFI pump on the EA82 engine is below the level of the tank, so it is gravity fed.

However, the carb pump in the EA82 will self prime (I've used one to empty a tank before), which does mean it will pull. The EA81 pump is in the engine bay near the top of the firewall, so your statement about electric pumps not pulling is incorrect.

 

There's always been some debate whether a carb pump is sufficient to prime an EFI pump. Because a carb pump is normally pushing against the pressure of the fuel lines & restrictor needles in the carb, whereas if its priming another more powerful pump, it's pushing against a "vacuum" created by the EFI pump pushing the fuel through and leaving "space" behind. As the output restriction is less, the flow rate of the carb pump actually goes up. However, the debate is about whether this goes up enough to cope with the flow rate of the EFI pump without letting it go dry.

 

Not saying you're wrong in doing something to this awesome project, as you weren't comfortable with the setup. And you'll definitely have piece of mind now :)



#44 Subruise

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Posted 07 June 2014 - 03:26 AM

wierd...how come i can use a spare efi pump to transfer fuel from above my gas can to another gas can? I know im cool but i dont think thats why



#45 Crazyeights

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Posted 07 June 2014 - 09:42 AM

 ...


Edited by Crazyeights, 07 June 2014 - 10:50 AM.


#46 cookiemonster131

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Posted 07 June 2014 - 09:56 AM

nevermind about the damn fuel system.... :wacko:

 

the BRAT bedside is repaired and i will try to get this thing painted and finishing up ASAP



#47 bratman18

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Posted 07 June 2014 - 07:34 PM

Pics!

#48 cookiemonster131

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Posted 10 June 2014 - 08:43 AM

Pics soon been busy with work and school

 

so I am trying to get some custom gen 1 brat decals made but cant get the guy on ebay ad to respond back to me about custom touches



#49 cookiemonster131

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Posted 10 June 2014 - 08:44 AM

anyone know someone else who does them?



#50 bratman18

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Posted 10 June 2014 - 08:48 AM

Pooparu on here makes them.




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