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Re: Bill's 200 20v, rebuild underway

Posted: Thu Jan 04, 2018 4:26 pm
by pilihp2
Awesome. I've been looking to do something like that to my own pan. Just gotta pull it.

Re: Bill's 200 20v, rebuild underway

Posted: Sat Jan 13, 2018 12:06 pm
by audios
It's in and bolted upImage


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Sat Jan 13, 2018 8:56 pm
by audios
Getting ready to replace the valve guides& seals, then will need to figure out the head gasket. I have heard you can rebuild/reuse the compression lowering head gaskets. Has anyone done this? It seems you could take a standard MLS head gasket disassemble and reassemble around the compression lowering one?Image


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Mon Jan 15, 2018 8:29 am
by dana
I think you should run standard compression. With a good ignition tune, you should be safe, and the powerband will be better all around.

Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Sat Feb 10, 2018 6:06 pm
by audios
Problem is, I can't afford to have it re-tuned. I had a old crank case tube and modified to keep oil from getting to valve cover. With stainless steelImageImage

Still have the original, but this one should work.


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Sat Feb 10, 2018 8:32 pm
by chaloux
Many people here could help with an basic ignition tune that won't detonate. Even if you take a few degrees out of the whole map that would help. You can always repurpose a knock sensor to hook up to a set of headphones with a little amp or directly into the cars head unit via AUX in. Then you can listen yourself. I did this in my 4k. Was so handy to be able to plug it into a laptop and record it during a WOT run.

Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Fri Mar 09, 2018 9:31 pm
by audios
well, the rebuild of the original head was way to much $ so i have just purchased a head from Max (Landfill) and it will hopefully get the car back on the road. I think i would like to use a stock HG, after i get the engine back together and in the car i will look into what modifications i will need to make to the tune.

Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Tue Apr 03, 2018 8:55 am
by audios
Got the new/used head cleaned up 7a cams installed, both head and block mating surfaces cleaned, ARP head studs installed ready to assemble engineImage


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Tue Apr 10, 2018 6:09 am
by audios
Engine is coming together with stock CR. Will need help setting up VEMS's ignition map at some point. Also going to get an aux radiator squeezed into the front somehow Image


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Tue Apr 10, 2018 6:24 pm
by audios
More assembly today, much easier on the stand than in the carImage


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Re: Bill's 200 20v, rebuild CRlowering HG?

Posted: Sat Apr 14, 2018 10:39 am
by audios
After reading a lot about heat wrap, pros and cons, rust and head retention, I decided to build a heat shield out of an old toaster oven panImageImageImage


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Re: Bill's 200 20v,getting closer

Posted: Thu Apr 19, 2018 12:51 pm
by audios
Back in the garage after years of waiting..... before running i will need to go into VEMS and make some ignition changes to account for the higher compression ratio (stock vs lowered) I have tuned with megasquirt in the past but this is my first vehicle with the luxury of VEMS, i took a quick look at the software on my little tuning laptop and it looks fantastic. would i need to change it a few degrees across the board? or mostly under load?

ImageImage


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Re: Bill's 200 20v, ign tuning help needed

Posted: Fri Apr 20, 2018 9:39 am
by vt10vt
I like the heat shield idea, I've built similar, but from experience you're going to want to do something about those edges. I still have scars from my sheet metal heat shields.

Regarding ignition timing, honestly I would get it running before messing with anything. You'll likely only need to make changes under high load, so I would get it up and running with what you know will make it run and then worry about fine tuning. If you leave it on spring pressure at least to begin with you should have zero detonation issues.

Re: Bill's 200 20v, ign tuning help needed

Posted: Fri Apr 20, 2018 4:06 pm
by chaloux
vt10vt wrote:Regarding ignition timing, honestly I would get it running before messing with anything. You'll likely only need to make changes under high load, so I would get it up and running with what you know will make it run and then worry about fine tuning. If you leave it on spring pressure at least to begin with you should have zero detonation issues.
:metoo:

Re: Bill's 200 20v, ign tuning help needed

Posted: Sat Apr 21, 2018 11:10 am
by audios
Thanks guys, it was running superb before so I guess I'll just start it up without touching anything


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Re: Bill's 200 20v, ign tuning help needed

Posted: Sun Apr 22, 2018 10:37 am
by audios
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Here you can see the Toyota Prius inverter cooler (small radiator to assist the slightly small main radiator) figuring out how to mount it to the IC bracket


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Re: Bill's 200 20v, ign tuning help needed

Posted: Mon Apr 23, 2018 11:40 am
by ringbearer
Prius parts! That's a first, love it

Re: Bill's 200 20v, ign tuning help needed

Posted: Tue Apr 24, 2018 8:27 am
by audios
Hopefully it holds up, it was the correct size to squeeze in behind the IC to add that little bit of extra capacity needed. Today I mounted it up more permanently with a small bracket I made
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Re: Bill's 200 20v, ign tuning help needed

Posted: Thu Apr 26, 2018 8:33 pm
by audios
The measurements did not account for the cross support. Had to re-designed a little bit but it's coming togetherImage


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Re: Bill's 200 20v, ign tuning help needed

Posted: Mon Apr 30, 2018 7:30 pm
by audios
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A bit more progress, turbo downpipe radiators, tomorrow the intake manifold


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Re: Bill's 200 20v, ign tuning help needed

Posted: Tue May 01, 2018 7:19 am
by vt10vt
Coming right along! Hope to see it around sometime, have you thought about bringing it up for Wolfsgart if it's ready by then?

Bill's 200 20v, ign tuning help needed

Posted: Thu May 03, 2018 6:40 am
by audios
Oh how i have missed working on cars...... got the intake manifold on and started adding fluids in preparation for thinking about a first start
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then as adding coolant it starts leaking out of 3 of the water manifold ports :bangshead: so back off it comes.... this intake manifold is a bit of a pain to get on and off, have to loosen all the bolts for the PS/PB and move out of the way to get the bottom bolt for #1 but i am getting better at it....

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Bill's 200 20v, ign tuning help needed

Posted: Sun May 06, 2018 9:17 am
by audios
Still moving forward, a bunch of RTV helped fix the coolant manifold leaks, but then a small one showed up on the back of the head. Tightened up the hose clamp hopefully that will stop it. Also working on getting the exhaust back on, it's a tight fit and uses Porsche hangers Image


Also, if anyone reads this knows about VEMS
And general tuning, would I be OK to start the car on the existing tune with the change in compression ratio? Not driving it, just starting and possibly low revving for the initial warm up to re-torque the ARP headstuds


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Re: Bill's 200 20v, ign tuning help needed

Posted: Mon May 07, 2018 9:15 am
by vt10vt
audios wrote:Also, if anyone reads this knows about VEMS
And general tuning, would I be OK to start the car on the existing tune with the change in compression ratio? Not driving it, just starting and possibly low revving for the initial warm up to re-torque the ARP headstuds


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Yeah, as recommended before, you will be fine. I doubt the timing in <100kpa parts of the tune is even any different from a standard 20v map with just a point of compression difference. :thumbsup:

Re: Bill's 200 20v, ign tuning help needed

Posted: Mon May 07, 2018 1:44 pm
by audios
Thanks Sean, I appreciate the input and I'm probably a bit nervous since I really don't want to blow it up after all the hard work


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