"Ray's AKA demonfire's XR4Ti build up"

Documenting your big project with photos/videos? Have photos/videos to share of anything Merkur related? Place your links to photos and videos here. Please - Merkurs and Merkur-related pictures only. Cosworths welcome!!
Carlisle and event related pictures are to be placed in the relevant section under 'Events'.
hotrodtodd68
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Post by hotrodtodd68 » Mon Mar 28, 2011 12:57 pm

Hey that's pretty cool Ray! Are you going to be around next weekend? I'd like to stop by sometime.
88 2.3T Mustang, 85 XR4Ti("Humpty-Dumpty"), 86 XR4Ti(someday project), 02 Wrangler Sport, 68 Firebird(red,fun), 71 GMC1500(dumprunner), 93 Geo Storm GSi ("Stitch"), 65 Mustang Convertible, 12 Dodge Challenger R/T ("the fast car"), 12 Toyota Highlander ("the lux-o-barge")

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Ray
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Post by Ray » Mon Mar 28, 2011 4:28 pm

Next weekend is season opener so i'll be racing both days.

After that it's hit or miss - shoot me a pm or an email so we can exchange info :)
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Post by hotrodtodd68 » Wed Mar 30, 2011 6:55 am

Good luck! :D
88 2.3T Mustang, 85 XR4Ti("Humpty-Dumpty"), 86 XR4Ti(someday project), 02 Wrangler Sport, 68 Firebird(red,fun), 71 GMC1500(dumprunner), 93 Geo Storm GSi ("Stitch"), 65 Mustang Convertible, 12 Dodge Challenger R/T ("the fast car"), 12 Toyota Highlander ("the lux-o-barge")

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Ray
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Post by Ray » Sat Apr 02, 2011 4:10 pm

So season opener is today / tomorrow. Today was a shakedown, tomorrow is first points.

Last night went to put the car on the trailer. I've been working on the tune on and off the past month or so. Still very rough, but drivable. Anyway, i have no clue what happened but my car wanted to buck / stall - ie, not move at all - under any load. Would go off the charts lean. First thought -fuel problem (duh). It's a MAP sensor so that eliminates major concerns of vacuum / boost leaks (which would lean to rich under any load, but anyway).

Was beyond livid pissed last night. The car ran great last weekend. Ended up adjusting the tune adding fuel below 100kpa (vacuum) to make up for it. Added some more this AM during shake down.


Notes:

3.36:1 rear end is not for me. We have a tight courses and i need that mechanical advantage for torque. My launch control last year was set to 2800 rpm and you had to feather the throttle after to not spin tires (when they are hot and sticky). Today was mid 40's / low 50's - and i reset launch to 4400 rpm and it still wanted to bog.

Screw all that. I'm putting the 3.64:1 gear set back in. Longer courses i'll just use 3rd gear. I still was able to manage times comparable to what i should but i had to go back into first gear. I gained another 1000 rpm of rev during tuning (would go too rich before and not rev over 5k -seriously, that rich). I can get to 6300 now so that helps my top end a lot.

No pics yet. Didn't spin out. I did get rather sideways a couple times but nothing huge.

I'd swap gear ratios tonight if i had gear oil. It's only a couple hour job. I'll just run first points event with the tall gears and maybe consider assembing another diff for longer courses or something. Diff swap is sub hour. Just have to justify another eaton purchase...

I'll probably swap back to the shorter gears this week or maybe next weekend.
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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anglin
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Post by anglin » Mon Apr 04, 2011 6:47 pm

Ray wrote:3.36:1 rear end is not for me. We have a tight courses and i need that mechanical advantage for torque. My launch control last year was set to 2800 rpm and you had to feather the throttle after to not spin tires (when they are hot and sticky). Today was mid 40's / low 50's - and i reset launch to 4400 rpm and it still wanted to bog.

Screw all that. I'm putting the 3.64:1 gear set back in. Longer courses i'll just use 3rd gear.
Not so fast, there. Ray and I raced the car on Sunday and the car didn't seem that powerful to me. I didn't know any better, though, since it was my first time driving it. It did seem to come onto boost very slowly. I just assumed it was the 3.36:1 rear ratio. I did have a *ton* of trouble getting the car to launch right. I've raced half a dozen XRs and never had so much trouble coming off the line. Five launches and never got a good one.

Ray will probably get in here eventually and post exactly what the problem is since he figured it out last night. Hint: it's not the rear end ratio.

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Post by Ray » Tue Apr 05, 2011 6:31 am

I am going to keep the ratio and figure out if i want to change it after the next event or so.

Anglin and I noticed HORRIBLE power output. IE- no horsepower at all. Still good enough for a class win (split btwn first and second place was 0.005 seconds... with Anglin beating me). I noticed a serious lack of oomph, boost, and my normally loud blow off was very... quiet.

Okay, boost issue.

Get car home, put car on stands (again), pull bumper, grill, intercooler plumbing and inspect. Find one tiny pinhole in one connector - not enough to warrant this kind of issue.

Check wastegate actuator - functioning (was worried it was sticking open)

Next up, pull downpipe and inspect wastegate.

What's this? Something is stuck in the wastegate keeping it open. Piece of slag from i presume the header is stuck in there.

Yeah, that would be a problem. Remove that. Put car back together.

Will be nice to run with more than 100whp again :p


Anglin - i'm going to lower the launch RPM again as if the car behaves like she did last year, we do NOT want it quite that high. I'm also going to check the tune again as i added a degree globally to try and help the power output problem during shakedown on sat.

You running @ the next event or no?
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Post by BeefFajitas » Tue Apr 05, 2011 1:29 pm

Anglin is in CT? Did I miss something?
-Nate
'85 Merk. Back together. Only thing stock is the head and block.

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Ray
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Post by Ray » Tue Apr 05, 2011 2:34 pm

He flew over to run with me on opening weekend and critique the car and offer suggestions. It's part of the full package - you didn't see that on the mc2racing website?






























kidding. yes. he's moving to CT.

:lol:
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Post by michaelb » Wed Apr 06, 2011 8:38 am

he's moving to CT.
YES!
Roll cages= viagra for car

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Ray
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Post by Ray » Sun Apr 10, 2011 7:29 pm

Picked up a kirkey aluminum racing seat (for the pass) and a 5 pt harness for the passenger side. Made me nervous having passengers over there in the stock seat with a regular seat belt.

Hopefully pegasus racing gets me the attachment points by this saturday - will be fabbing the seat mount this week.


It's pretty amazing to me to look at how much progress i've made on this car - not so much in the car itself, but in the learning curve of how to make stuff fit. My old welds make me shudder. Live and learn, right?
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Post by Ray » Mon Apr 11, 2011 12:54 pm

Am off today so i decided to install it.

Modifying the stock rails to accept a race bucket... Tig welded. Tried acetone for the first time. Works pretty well.

Image

Finished welding...
Image

And installed. Re-dyed the fabric - it was pretty faded.

Image
-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Post by hEaT » Mon Apr 11, 2011 1:30 pm

Looks great. Lets do a cross-country road trip so we both can have permanent back problems :lol:
Joe
1985 Nimbus Grey XR
2017 Ford Focus RS

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Ray
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Re: "Ray's AKA demonfire's XR4Ti build up"

Post by Ray » Mon May 16, 2011 7:40 am

The R888's are surprisingly good in the wet. Car did well.

Things of note:

1. Exposed air filter makes the car smoke when it's wet. Need to build shield for wet weather.

2. My windshield leaks. Gotta fix that.

3. Just because i think the car needs to have some change at each event, my turbo oil drain started leaking.

I was the event chair and got to design the course. I decided to go with a shoestring course. Minimal cones, use of the entire lot, and good practice in the rain.

Anyway. Piccies.


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-Ray
1985 Ford F150 - Tow Missile
1985 Merkur XR4Ti -#141 CP "Miss Daisy"
2005 Subaru LGT
http://www.cartct.com

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Re: "Ray's AKA demonfire's XR4Ti build up"

Post by hEaT » Mon May 16, 2011 12:01 pm

Looks good Ray. I like the pics of the XR with the tow rig in the background.
Joe
1985 Nimbus Grey XR
2017 Ford Focus RS

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Re: "Ray's AKA demonfire's XR4Ti build up"

Post by Grayson » Mon May 16, 2011 5:19 pm

Looks like a perfect day! If you're not going to run R-compounds, you may as well pray for it to rain at every event. I really need a rain tire setup for my car, for I only have the Hoosiers. If it rains, I'm done for.

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