ReplicaR's Mustang build *finally on track again*

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ReplicaR

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In development land, refactoring is something we call when an issue has been discovered, and it requires rethinking the approach and reworking the code. The next step of Mustang project is pretty much refactoring. I’ve been rethinking about why I can’t really harness the speed as well as I would like, and I’ve put together a comprehensive list of what will be tackled.

1. Front end geometry: When the engine was built, I decided to shift it back on k-member 1 inch backward for better weight distribution. One thing that I discovered is that when you do that, the front sump of the oil pan gets in the way of the steering rack, and the rack has to be shifted down to clear it, which in turn requires to adjust for bumpsteer. Doesn’t seem like a big issue until you realize that even when you max out the bumpsteer adjustment, you are still nowhere near where it should be. To remedy this, I had the engine moved back to original position, set the rack back to the center on the adjustable bushings, and dialed in the bumpsteer with the gauge to almost no change at all (as close as it would get to 0 toe change).

2. Hydroboost: As some may know, I’ve converted my car to hydroboost in order to be able to utilize the brakes to their maximum potential. The conversion consisted of hydroboost unit with master cylinder and pedal box from 96-04 V8 powered car to line up the pushpin with the pedal. I decided to power the unit with the stock 94 power steering pump. The issue is, that the pedal doesn’t feel anything like you would find in a normal OEM application. The travel is short, the pressure is really hard, feels like stepping on a rubber ball. I’ve had a chance to drive a 96 GT, which has a full factory hydrboost system, and I’ve realized that the pedal feel is completely wrong on my car. Since the power steering pump is the only piece that still hasn’t been converted, I assume this is what I need to fix. I have to keep a couple of things in consideration, such as size of power steering pulley and crank pulley to make sure that I don’t over-drive or under-drive the pump, and mounting it will be a separate challenge all together, since they are completely different mounting styles.

3. Oil rings: The motor is consuming oil like crazy. Having eliminated everything else, looks like oil rings are not doing their job well. I can see it smoking oil out of the tailpipe, and level goes down pretty quickly. Looks like Wild Pony Motorsports strikes again. Absolutely everything that shop touched about this motor is total shit. I’ve asked for a quote regarding how much it would cost to fix the issue, still waiting on the current shop to get back to me on that.

More updates to come soon hopefully.
 
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ReplicaR

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Got the parts necessary for the conversion of power steering pump. The mockup will be done next week. Just the pump and pulley are necessary for now. If I can get those working, the lines and reservoir should be a breeze.

10mvubd.jpg
 
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One step closer to having full hydroboost conversion done. Pressure line has to be redone, and install reservoir.
 
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ReplicaR

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So, I took the car back. After driving it around the block, I can definitely tell that the brake pedal is a bit better. There is definitely more travel, it feels a bit more OEM-ish, although still a bit harder than I'd like it to be. Even though it's a full factory setup now, it still doesn't feel as nice as vacuum brakes did on the pedal and modulation, but it will have to do. The biggest thing for me now is to relearn how to brake on this car, since I've been spoiled by outstanding system in my daily driver, and I haven't had any seat time in this in almost a full year. Next up is the tune rework and a trip alignment shop, after which the car will get a shakedown at the autoX.




 
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ReplicaR

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How are you liking the pc680 battery?

It's been really good. It's got enough juice to crank the car, even if it sat off the charger for a couple of days, but I keep it on battery tender when the car is parked.
 

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Dmitry, would you please take a look at your brake proportioning valve again? I'm curious to know the orientation of the lines coming off of the hydro boost cylinder into the brake proportioning valve.
 
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ReplicaR

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I want to say that it just travels down right into the corresponding port on the proportioning block, but I can't remember off the top of my head. I'll be working on the car this weekend, I'll take a look for you.
 
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ReplicaR

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A blizzard of reliability issues.
1. Power steering pump failed right on the first run, no steering or brake assist. When I was completing the hydroboost power steering pump swap, I specifically asked for MotorCraft pump, because I wanted it to be reliable. So much for that, trip to parts store #1
2. Rear sway bar end link bolt fell out. The car felt like it was understeering, so I decided to adjust the rear bar. Upon picking the car up, I realized that I don't have a bolt in one side at all. Trip to parts store #2
3. The return hose from new power steering pump kinked, causing it to create low pressure. Routed the hose differently, but still kinks
4. Spindle mount bolt got loose and the tire started to rub on the coilover.
But here's a picture of two mustang on RPF1s


PMPO9NL.jpg


x381Pjr.jpg


sLJPrwv.jpg


Do you think I have enough camber?

niZf4VU.jpg
 

g36 monkey

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I need those wheels in my life!!

And ugh, I figured hydroboost may give you some trouble, but it sounds like you are shaking down the issues!
 
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A blizzard of reliability issues.
1. Power steering pump failed right on the first run, no steering or brake assist. When I was completing the hydroboost power steering pump swap, I specifically asked for MotorCraft pump, because I wanted it to be reliable. So much for that, trip to parts store #1
2. Rear sway bar end link bolt fell out. The car felt like it was understeering, so I decided to adjust the rear bar. Upon picking the car up, I realized that I don't have a bolt in one side at all. Trip to parts store #2
3. The return hose from new power steering pump kinked, causing it to create low pressure. Routed the hose differently, but still kinks
4. Spindle mount bolt got loose and the tire started to rub on the coilover.
But here's a picture of two mustang on

Do you think I have enough camber?

niZf4VU.jpg

Jeez Dmitry stop breaking things
 
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ReplicaR

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Hey guys, I know it's been a while since last update, figured I'd throw something on here. The current situation is, mustang has been sitting since the last event. The reliability issues pissed me off so much, I decided to take some time off from that car, and focus on the house search, and running the G37 in the SCCA F Street class all season this year. Chances are, I will probably get some work done on the mustang some time this year, but it will be later towards the end. I'll update the thread eventually, hopefully sooner than I think. I've got a list of things I want to accomplish, so that will get finished eventually, and I will get the car out on track again.
 
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ReplicaR

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Yeah, having a small child and just being generally busy with life, makes very little time for extra curricular activities, particularly an expensive track car that you have to drive 1 hour to in order to do any kind of work
 
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ReplicaR

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Some work has been happening on the Mustang. I'll update the thread very soon. At the moment I'm handling all the cheap and free stuff, while hunting for the house. Supposed to close escrow this friday, so there will be more work done on the Mustang as soon as it's under the same roof as me.
 

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