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Jasper, Yoodaman. I believe Lotus Cars worked with Bose and created an active noise cancelling system a few years back. The system produces sound waves inverted to those it senses. Presumably one could dial in total silence or tune it to sound to your particular liking. I have no idea of...

Rob, You're on. For which car and head/engine combination? If you're not concerned with them being "replica" then there's a lot more we can do given today's technology. How about a set of equal length stepped headers? You asked for Xtreme? Email me at [email protected] if you want to...

Thanks for the comments folks. I'll try to respond to each question or comment in sequence. Gary, these are 1.75" primaries. The collectors are tuned to the engine bore, stroke, cam timing, rpm range and more. They came out to be 2.25" transitioning to 2.5". Bolt pattern on my Victor Jr...

I'm pleased to announce the first set of stainless steel headers from XtremeClassics is nearing completion. This first set of headers sets the bar for our high end headers. Made from .06" thick 304 stainless with specially tuned merge collectors, double slip fit connectors and ceramic lined...

I know it may upset the purists to have a door stuck on the front of their car. :-) http://xtremeclassics.com/aero_devices_pics.html This is a positive plug for a splitter for an ERA GT40 (stuck to a door). It's still quite rough and needs radii and fences but it'll give you all an idea of...

And you know it don't come easy. (coolhand) I have some good news and some bad news. The good news is the splitter I'm making will go from the drawing board to model (positive plug) this coming week. I'm reluctant to say when a copy will be ready since I'm striving for a level of quality and...

I will endeavor to make these items as unobtrusive as possible. Asthetics are utmost. Does anyone know of a GTD GT40 in the Northern Va area? I can get access to RFs and CAVs but I'd like to compare dims on the GTD also. Thanks, Mark

I should know by Nov 1 when the pieces will be ready for sale. Initially we'll be making the front splitter, the side sill extensions and the rear diffuser. I guess it makes sense to offer these in both fiberglass and carbon fiber. We'll start taking deposits once we can determine a solid...

Chris, If that 150 lbs of lift brings the nose up so your front ride height is higher than the rear I'm sure you'll notice that in the stability of the car. To let you all know I am designing a splitter for the GT40 and I'm planning to sell it through my XtremeClassics venue. An off topic...

For your enjoyment:

Most of us were dismayed but not too suprised to find our babies (originals and replicas) had aerodynamic lift at speeds. A new Car & Driver article shows how they achieved modest downforce while keeping a similar body shape. Their fixes were simple. 1. Add front chin spoiler (splitter)...

I was just thumbing through the latest Car & Driver and found an article on the latest developments of the GT as its design converges on the real production car. They ran a mkII through Swift Engineering's rolling road wind tunnel. As we have seen there was substantial lift front and rear...

Beware - rant to follow: I'm copying the forum on the letter I sent to my credit card company outlining the scam. Basically I saw P-ayr's product that another forum member had bought and had dimensional and alignment questions for the manufacturer. I was assured dimensions and alignment were...

I have a 351 stroked to 427 by Probe Industries. Another major problem with strokers is the piston pin violates the oil control ring lands. This causes excessive oil burning in fairly new engines. The probe motor solves this and they warranty the engine for 50K miles. With a mass air port...

I have designed and completed cutting all the steel to fabricate a jig for manufacturing headers for ERA GTs. I'm hoping to have a set of premium stainless headers to show the group within 1 month. We will be offering GT40 reproduction headers in stainless and mild steel. Guess I need a real...

Interesting. Got this off the mulsannescorner database. 1967 Ford GT40 MkIV Lift: 148 lbs. @ 150 mph, with 365 lbs. of drag 213 lbs. @ 180 mph, with 554 lbs. of drag 263 lbs. @ 200 mph, with 648 lbs. of drag 318 lbs. @ 220 mph, with 828 lbs. of drag 1966 Ford GT40 MkII Lift: 100 lbs. @ 150...

Does anyone have any hard engineering data (or failing that some word-of-mouth) on aerodynamic lift or downforce that the Mk1 sees at speed? Basically is there downforce at the front and rear or is there lift at either end? Thanks in advance, Mark

Jim, A little off topic but I thought the J car had a chassis that was good for just so many laps. Similar to certain helicopter parts once that time is reached, its life is over. That's why Stouffer's Mk II get run hard at the track while the J car does a slow parade lap. Mark

Hi Nathan, A few questions: 1. Who did your coating and what did they use? 2. What's your AFR? I've not seen a coating yet that didn't discolor when the engine was run a little on the lean side. But then I haven't experienced everything so maybe I need to be educated. Mark