Carlisle and event related pictures are to be placed in the relevant section under 'Events'.
1988 Mono Rosso Red Merkur XR4Ti - Sold!
Chris, ditto what Jeff said. The VAM is causing the issues mostly. If the valve is venting and you're not fully off, you'll be going rich which is causing the stumble. A BPV would help, but then you run into the issue where the air venting can push the VAM door closed and cause a lean condition...and a stumble. Speed density really is the fix, or going with a blow-through VAM or MAF setup.
Jeff, regarding the rake I honestly am not too sure. I really need to get some seat time (AND EXPERIENCE!!) racing the car to see if the back end is too light or not under braking.
Lots of updates to post, which is a good thing
Ripped it all out, threw in the MS3 with the base map and it fired right up. Drove the car 60 miles last weekend...which is 3x as much as the car has seen in the last TWO years. Felt great and with the car now on Bilstein B8s and stopping with Wilwoods up front...it's fantastic. Feels really well sorted.
If I could do this car all over again, I would mod in this order:
- All bushings & diff mount
- GOOD dampers and springs
- Bigger wheels to fit proper front brakes, and sticky rubber
- Upgrade front brakes to a fixed caliper, and convert rears to discs
- Then whatever power mods you desire
Merkur still runs, fired it up for the first time in 2 years last weekend. Changed the timing belt as preventative maintenance, and put on a Racer Walsh tensioner (old one had shot bearings). Pulley is a tad larger than OEM, so tight getting on the new belt. Instead of using the lock bolt to hold the tensioner open, I had to pry it further and hold it with the pivot bolt.
Loudest of lifter ticks/rattles on start after, which quieted down after 5-10min of running. Wonder if moving the cam without oil pressure took the oil out of the lifters.
I have everything here to do a round tooth conversion, also from Racer Walsh, but didn't feel like getting the sprocket off the crank pulley. Didn't have time and look too involved to do it right. Square tooth will work fine for now, as it has for 35+ years on this car. Crazy that I've owned this car for 15 years this month.
A picture to prove it still exists. Can see the alternator bracket from https://bigrmotorsports.com/ (Low Mount Alternator Bracket for non-power steering). Drilled out the pivot bolt to use a bushing from the Merkur bracket (sandwiches the alt case to also hold adjustment and keep it on plane once you shim it correctly, I don't like relying only on the upper bracket). A lot of nice parts on his site, give it a look.
Need to fix the exhaust hangers (snapped at autocross in 2019), swap the leaking oil pan (SVO pan leaks from the level sensor and is the wrong style for the early block, have a good early pan from Jeff that I got 3 years ago to install), then hopefully I can drive the car. Hasn't been on the road since that end of season 2019 autocross.