Search found 414 matches

by MarkM
Sat Sep 10, 2005 12:44 pm
Forum: XR4Ti
Topic: Rapido Big Valve Head
Replies: 13
Views: 3242

From the 1994 Motorsport catalog: 2.3L OHC Cylinder head assembly - M-6049-A231 Here's a great package for "bolt on and go" fans. Cast iron cylinder head features "D-shaped" intake ports with combustion chamber volume of 62.4cc. Intake valve shrouding had [sic] been deleted. Cylinder head is machine...
by MarkM
Mon Sep 05, 2005 12:58 pm
Forum: Scorpio
Topic: Ignition angle?
Replies: 8
Views: 2352

US and European octane numbers are arrived at using different methods. The US uses (Research + Motor Octane)/2 for their numbers. I believe Europe uses only the Research number. The result is European gasoline would have a lower octane number if rated by US method. Quickly checking Google, I didn't ...
by MarkM
Thu Sep 01, 2005 12:12 am
Forum: General Discussion & Intro Forum
Topic: need admin help
Replies: 1
Views: 1404

Paul,

I'm taking care of it.
by MarkM
Tue Jun 14, 2005 10:53 pm
Forum: Racing & Track Events
Topic: 9 miles under my belt
Replies: 5
Views: 3509

Re: 9 miles under my belt

A quick estimate puts 4000 rpm at about 80 mph. That's quite an autocross event site they have if you are exceeding 80 mph. I've only gotten near that speed at one event. A local group used to put on events at a former military airstrip and set the course up on the runway. It started about 1/4 of t...
by MarkM
Mon Jun 13, 2005 12:49 am
Forum: XR4Ti
Topic: Clutch quadrant removal
Replies: 4
Views: 1116

I've only done this a couple of times, and my memory's not that great, but the clutch and brake pedals come out as a single unit. Release the clutch cable from the quadrant first. I remember needing to remove three nuts, either 15mm or 17mm IIRC, and I think two are horizontal into the firewall and ...
by MarkM
Sat Jun 11, 2005 12:22 am
Forum: XR4Ti
Topic: replacement lug nuts?
Replies: 17
Views: 2804

Phil's lug nuts sound very promising, I'll be looking for them. Another possible option I've wondered about for some time is European car dealerships such as Audi, BMW and Mercedes. My logic is that the lug nut design used on Merkurs is supposed to be pretty common in Europe, maybe the other brands ...
by MarkM
Sat Oct 30, 2004 2:04 am
Forum: XR4Ti
Topic: saab IC in battery tray location
Replies: 10
Views: 1969

Don Haulsee put dual Saab 900 ICs in the battery tray and had temperature probes pre- and post-intercoolers. Unfortunately, I don't remember the exact numbers, but it was definitely an effective arrangement. I seem to remember that he spent a lot of time playing with yarn strips to check the airflow...
by MarkM
Tue Oct 12, 2004 11:30 pm
Forum: XR4Ti
Topic: 600+ HP mark
Replies: 36
Views: 5867

What head is he using?
by MarkM
Thu Oct 07, 2004 11:58 pm
Forum: XR4Ti
Topic: Broke engine. I am stumped. What can ya'll make of it?
Replies: 28
Views: 4733

I don't remember the exact sparkplug gap at the moment, but .045 is definitely too much. .032 - .035 is more like it. You also might want to check the routing of your spark plug wires for a possible crossfire condition.