The Quickening - Another rebuild story

66642 Views 248 Replies 55 Participants Last post by LotusElise, Mar 13, 2022

chunky`

Discussion Starter · Dec 16, 2010

4

I've been rolling on my backup motor for over a year now, but the final gems for my next build are all in my possession.

Mahle 12.5:1 4032 low-expansion aluminum alloy pistons
Cunningham 4340 steel alloy rods
Hytech 4-2-1 header

This will be added on to the IPS K2 Mark III cams I already have in another 2.0L build.

Since I just got the rods in, here are some more pics.

Just a stock dimension rod

oiling holes for wrist pin

In case there was any doubt.

Nothing too exciting happening yet, but now that the rods are here, everything else can proceed. Stay tuned for updates.

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221 - 240 of 249 Posts

chunky`

Discussion Starter · #221 · Apr 21, 2012

Lucid Moments2 said:
I'll believe it when I see it.

You'll be among the first I'm sure.

k20z1dc5 said:
And so the K explosion in the ATL begins :wow:

Indeed!

ImportRacer2123

· #222 · Apr 21, 2012

good to hear man! cant wait to see this beast up and singing to 10k

MountainK

· #223 · Apr 21, 2012

nice:up: i wonder who bought tom hatch in ATL!??.... hummmm........... whoever got it, i hope they put a POWERFUL k swap in it

Lucid Moments2

· #224 · Apr 22, 2012

k20z1dc5 said:
And so the K explosion in the ATL begins :wow:

Hmmm, Explosion may not be the kindest word to use when talking about Chunky's motors. Accurate maybe, but not kind.

k20z1dc5

· #225 · Apr 23, 2012

Lucid Moments2 said:
Hmmm, Explosion may not be the kindest word to use when talking about Chunky's motors. Accurate maybe, but not kind.

How clever of you to pick up on my literal and figurative quip.

Glad Chunky is about to be back in the game. It's a great thing for all enthusiasts.

chunky`

Discussion Starter · #226 · Apr 24, 2012

Haha, jokes aside, I did have a bit of bad luck last fall when I was last making updates. I actually got the motor together & running but ran into some issues on the LAST street tuning pull before the car was to be parked prior to a dyno session. As the revs came down, a slight ticking sound was heard. Slight ticking sound rapidly got worse. Car was towed back to the house, motor came apart. Spun rod bearing. 30+ street pulls to 8k, no issues till the last one. Major bummer. However, everything was caught in time, and no major damage. Sent rods back to Cunningham for inspection, block is getting re-honed, cams are fine, piston skirt coating is being re-done just in case, etc.

Now, why did the bearing spin? I'm really kind of at a loss since the bearing clearances were no tighter than what I've run in the past. The one peculiar issue I had with the motor is that on startup the oil pressure was super high. I mean high enough to randomly pop the motor into VTEC with the solenoid closed, as verified in kpro datalogs. This is with a 5w-30 breakin oil in the motor. Measured at the back of the head on a cold start, 140+psi. Once the oil gets hot, oil pressure dropped to a healthy 20-25psi, no randomly popping into VTEC. Since the oil filter I was using has an internal bypass, I can only imagine at 140psi the filter bypass was open and some breakin debris eventually made it into the bearing journals.

Motor should be back together soon-ish. A stock oil pump will be used to see if I can isolate the oil pressure issue to the oil pump mods I had made. I'll also be using a Canton racing spin on oil filter that has no internal bypass to prevent the possibility of any break in debris getting into the journals.

Anyhow, pics galore coming soon. The motor was beautiful for the short time she ran - easily the smoothest revving motor I've built. The higher she revved, the harder she pulled. Oh, and super super quiet once she warmed up. Can't wait to have her back together and running right this time.

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k20z1dc5

· #227 · Apr 24, 2012

She began to sing a beautiful song. I am pining for her next concert.

Froski

· #228 · May 14, 2012

Interested to hear what the verdict was on the valve spring rev limit test.

LotusElise

· #229 · Dec 2, 2015 (Edited)

The suddenly retarded - Another rebuild story

I know it is a old thread, but as it is very interesting read about DIY K20 build at a high level worth to read it anyway

.

Does anyone personally know chunky`? I did try to contact him via pm and email (of his homepage razid.com) with no success

. I would like to ask him some questions about his engine build and so on, therefore I would appreciate to get an up-to-date contact address via pm if chunky` wouldn't mind you sharing it.

Markus

chunky` said:
...Spun rod bearing...Now, why did the bearing spin? I'm really kind of at a loss since the bearing clearances were no tighter than what I've run in the past. The one peculiar issue I had with the motor is that on startup the oil pressure was super high. I mean high enough to randomly pop the motor into VTEC with the solenoid closed, as verified in kpro datalogs. This is with a 5w-30 breakin oil in the motor. Measured at the back of the head on a cold start, 140+psi. Once the oil gets hot, oil pressure dropped to a healthy 20-25psi, no randomly popping into VTEC. Since the oil filter I was using has an internal bypass, I can only imagine at 140psi the filter bypass was open and some breakin debris eventually made it into the bearing journals.

Motor should be back together soon-ish....Anyhow, pics galore coming soon. The motor was beautiful for the short time she ran - easily the smoothest revving motor I've built. The higher she revved, the harder she pulled. Oh, and super super quiet once she warmed up. Can't wait to have her back together and running right this time.

Of course it would nice to know how the story was going on

.

LotusElise

· #230 · Dec 6, 2015

Anyone who know him personally and could give me hint where I can find him actually? I would appreciate your help.

Thanks

Lambo123

· #231 · Feb 10, 2016

Last time i talked to him was probably about a year ago. He used to modify timing chain tensioners for people (including me). Most likely moved onto bigger and better things. I almost wish they'd sticky this build so the newer guys can see what a proper 2 liter build looks like!

LotusElise

· #232 · Feb 11, 2016

Contact to Chunky`

Lambo123 said:
Last time i talked to him was probably about a year ago...

Great, you know him personally? I would appreciate to talk to him...

Lambo123 said:
...almost wish they'd sticky this build so the newer guys can see what a proper 2 liter build looks like!

Yes, this is one of the interesting builds here. Chunky`made a lot investigation in details and where open to show it to public...nice stuff to know

. Exactly because of that fact I would much appreciate why the main bearing did spin...as out of failures or specific issues you always learn for live.

ImportRacer2123 wanted to forward my contact for that question to chunky`, but still didn't get any replay. This information would be much appreciated...I am also interested which way he did take in live, as his CV has some overlay with mine. I am always interested in such stories

.

Markus

chunky`

Discussion Starter · #233 · Jun 6, 2016

Whoa. I wasn't expecting to see this thread on page 2.

It's been awhile since I've done anything with my ride. I've still got all the parts to resurrect my build, rods, pistons, cams, header, etc. Just haven't had the time to do it. I've been traveling a lot, but starting to get the itch again.

Plus, the Type-r is coming, and I want to have this done before I get the type-r so I can race them against each other. hehe.

tiger

· #234 · Jun 6, 2016

chunky` said:
Whoa. I wasn't expecting to see this thread on page 2.

It's been awhile since I've done anything with my ride. I've still got all the parts to resurrect my build, rods, pistons, cams, header, etc. Just haven't had the time to do it. I've been traveling a lot, but starting to get the itch again.

Plus, the Type-r is coming, and I want to have this done before I get the type-r so I can race them against each other. hehe.

That's one heck of a hiatus. Glad you're getting the itch again.

LotusElise

· #235 · Jun 6, 2016

chunky` said:
It's been awhile since I've done anything with my ride. I've still got all the parts to resurrect my build, rods, pistons, cams, header, etc.

Hi chunky`, it is great to have you here back in game, as your writing here such full of valuable information and not only here man, in many other threads and posts you contributed essential knowhow :up:. Thanks man, allways a plesure to read and learn about it!

I am reeeaaally interested in your root cause analysis of spun the rod bearing. I am on the way of building a 86.5x86 engine with similar small block layout (except pistons, which are exact the same

). My first question would be, was it the big bore (crank pin) or the small bore (gudgeon pin)? So your info about the issue is much appreciated.

Markus

chunky`

Discussion Starter · #236 · Jun 9, 2016

LotusElise said:
Hi chunky`, it is great to have you here back in game, as your writing here such full of valuable information and not only here man, in many other threads and posts you contributed essential knowhow :up:. Thanks man, allways a plesure to read and learn about it!

I am reeeaaally interested in your root cause analysis of spun the rod bearing. I am on the way of building a 86.5x86 engine with similar small block layout (except pistons, which are exact the same ). My first question would be, was it the big bore (crank pin) or the small bore (gudgeon pin)? So your info about the issue is much appreciated.

Markus

The rod's big bore bearing spun. The most likely cause was determined to be too much oil pressure at startup. This will be addressed in the next build.

american.graffiti

· #237 · Jun 14, 2016

The legend has returned. I look forward to the resurrection of your build.

LotusElise

· #238 · Nov 25, 2016

chunky` said:
...but starting to get the itch again...

opcorn:

LotusElise

· #239 · Mar 13, 2018

Still looking for it

opcorn:

BlackNDecker

· #240 · Mar 13, 2018

chunky` said:
The rod's big bore bearing spun. The most likely cause was determined to be too much oil pressure at startup. This will be addressed in the next build.

How does one have too much oil pressure at start up? Too much oil volume (volume-pressure relationship)? Or was this a hardware issue related to aftermarket parts?

Were you running the k20a2 OEM oil coolant fitting and lines? As I recall that lowers oil pressure in the system quite a bit.

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