Keep Drifting Cheap: turbo RB20 C35 Laurel for peanuts

Thread in 'Project Cars and Builds Threads' started by BenRice, Jan 6, 2020.

  1. Bu11et

    Bu11et Well-Known Member

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    woohoo
     
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  2. BenRice

    BenRice Well-Known Member

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    So life's getting in the way a bit of my Monday updates, but I'll throw in a Wednesday one with what I've gotten done

    Seat brackets are getting welded up today & alignment is booked for Saturday & will adjust handbrake whilst there

    Boss kit still hasn't arrived from Coronaland but a mate popped around with an HKB one the other day, so the woodgrain is on
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    Then wanted to fill the cupholder hole, so rather than reinventing the wheel i just cut the old cupholder down & added a bit of plastic sheet to block off the side. The cavity where the lid was is perfect for holding a phone
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    Then played around with getting the shift boot installed. Not perfect but it'll do
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    Then drilled a couple of holes and fitted a fire extinguisher in front of the passenger seat

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    Oil change is all done & it's loaded with storage wheels, skid wheels & part worn tyres to fit. Found 4 of the skid wheels have tyres fitted that just need flipping, and with all the swapping around I'll be taking 8 half-worn 215's in total. If i get through all of those I'll be stoked/amazed

    I've sorted a stiffer wastegate & have a bigger intercooler for the 15psi retune after Matsuri. I've got an oil sandwich plate & an old cooler to throw in once some fittings turn up to keep the oil temps in check as well
     
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  3. J1R1

    J1R1 New Member

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    What an awesome read, keep it up!!!
     
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  4. BenRice

    BenRice Well-Known Member

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    Well long time no update because it's been in storage since the last one. But the time finally came the weekend just been - we've just finished running another successful matsuri.

    I took Friday off and packed the tow vehicle in the morning, then shot up to my mates place to drag it out & hitch up the a-frame.

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    It towed nice & smooth, a credit to the Hakon coilovers. Tightened up the handbrake at the accom that night and was at the track bright & early to get it ready to go whenever a slow spot emerged.

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    Now, what everyone has been wanting to know: what does an RB20E+T drift like?

    Short answer: amazing

    The engine had a great amount of midrange. Didn't have to wring it's neck and 144kw did 90% of what 216kw and 266kw did in the Silvia no problem. The rev limit of 6500 got in the way a bit coming out of the hairpin, but just needed me to time the upshift to 3rd and we were golden. It was a great amount of power for a low grip setup (half worn 215/45/17's at 45psi, dampeners set full hard).

    The rack spacers gave it the right amount of steering lock to go with the big wheelbase. Helped make it nice & predictable. Cable handbrake worked a treat too. Only issue was the over centering & low rpm steering was very heavy. I've got adjustable lock stops to fit to sort the over centering & I believe there's a sensor i need to give 12v to make it increase pressure at low speed.

    It sounded epic at full chat, looked staunch slammed on the Advan's and was a hit with people in the pits.

    However, it wasn't a flawless victory by any means. On the dyno, after the first pull the head got a decent noise so Brent put in 100ml of some oil additive and it went away, so i suspect it's a dead lifter. I then did an oil change afterwards so said additive wasn't in there and completely forgot about it.

    As a result, once the oil heated up on the track in the first session the noise came back. I did 3 truncated sessions, stopping when said noise got too loud. Sunday morning a mate brought along some Morey's oil stabiliser so we shoved that in but I think damage had been done. At the end of the 2nd session i sat in on limiter for a little too long and it dropped down to 5 cylinders.

    I'll do a compression test and try find the culprit cylinder then rip of the valve cover & inspect. Hoping i can get away with a lifter replacement and we're away again but not holding my breath. Will hunt out a replacement just in case.

    Will post any further pics as they pop up
     
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  5. BenRice

    BenRice Well-Known Member

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    First lot in (should really have cleaned up the wheels!)

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  6. BenRice

    BenRice Well-Known Member

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    So took the valve cover off and checked the lifters & rockers. No issues there but quite gunked up

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    Found a bit of condensation in behind the baffles & the above milkyness. Suspect some water was sitting in the baffles whilst it was sitting under a tarp with the breathers exposed and it mixed with the oil, thinning it out a little. Hence the low oil pressure.

    Lifters checked out ok so cleaned the cover out thoroughly, popped it back on & started it up. Firing on all 6 & more oil pressure than before. Compression test done now too and 180psi across all cylinders too

    So now it's up for sale as the place we're looking at buying doesn't have a shed. Sad to see it go but i can always build another. I'm thinking a RWD M34 Stagea. Rob the engine for a forged rebuild to go in the S13 and go RB20E again, but this time maybe twin T25's....

    Who knows though, no one may buy this and I'll end up fiddling with it some more. Time will tell!
     
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  7. BenRice

    BenRice Well-Known Member

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    So still have this as no one wanted to pay me $7k for it so gave it an oil change & took it out again

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    First lap out it started running on 5. Decided to see what 5/6 of 144kw goes like. Wasn't too bad tbh, kept jumping out of 3rd tho

    Brought it in and thought I'd found number 6 lead not seated on the plug (since found almost all weren't seated 100%). Seemed to idle better so started pulling leads, listening for a change in idle to check that was it. Pulled number 5 too far and it must have arced on the head. Result: no spark.

    Traced it to a dead coil. Twas a Sunday so only generic part stores open & none had a replacement in stock. No one else at the track was enlightened enough to be running a 20E or 30E. Couldn't even rustle up a 2-pin coil and bodge something. Even more frustrating was knowing I had one or two spares at home

    By this time it was lunchtime so I packed up and drowned my sorrows in pizza. Spent the arvo sorting out rides for all the other volunteers with my homies.

    Drove home and immediately found a spare coil, put it on and it fired up. Urgh



    Now focusing on getting this shed in. The rona has meant all the money people would spend on travel is going into stuff like building projects, so getting a builder is nigh on impossible.

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    Have a replacement long block lined up for when this decides to quit. Hoping that the first job I do in the new shed is swapping the blocks over, then sell it and buy a hoist to build Lunch Money 2.0
     
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