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Old 22 Aug 2023, 09:36 (Ref:4173613)   #1
Robin Marriott
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Contemporary Crossflow builders

I wasn’t sure where to post this so apologies if it’s in the wrong place.

This might be a bit of a niche interest but I’m trying to build a complete list of Crossflow engine tuners, in particular ones who had their own rocker covers, a bit like this but for Crossflows - https://mk1-performance-conversions....er_covers.html

If you’ve got any pictures of crossflow engines in situ with a non standard rocker cover, I’d appreciate seeing them.
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Old 22 Aug 2023, 14:17 (Ref:4173637)   #2
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Originally Posted by Robin Marriott View Post
I wasn’t sure where to post this so apologies if it’s in the wrong place.

This might be a bit of a niche interest but I’m trying to build a complete list of Crossflow engine tuners, in particular ones who had their own rocker covers, a bit like this but for Crossflows - https://mk1-performance-conversions....er_covers.html

If you’ve got any pictures of crossflow engines in situ with a non standard rocker cover, I’d appreciate seeing them.
Hi Robin. I've no pictures unfortunately, but from memory I'm sure the crossflow & pre-crossflow rocker covers were the same?
If so, hopefully someone will have a picture of a Cosworth rocker cover. (I wonder how many people were sold a Cortina GT with a claimed Cosworth engine which in reality only had the rocker cover fitted?)
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Old 22 Aug 2023, 15:11 (Ref:4173646)   #3
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I think you’re right in pre-crossflow and crossflow ones, they certainly look the same.

Regarding the Cosworth one, there appears to be 2 types of those, I have pictures and will post them here later for prosperity, along with some others I’ve found.

What’s interesting to me is the fact that they exist at all, there’s no need for any of the tuners to have bothered making them.
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Old 22 Aug 2023, 18:06 (Ref:4173674)   #4
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Now I'm home I can post some pictures of what I've found so far -
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Old 22 Aug 2023, 18:09 (Ref:4173675)   #5
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The Burton one I think is modern rather than period
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Old 22 Aug 2023, 18:11 (Ref:4173676)   #6
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I particularly like the Ginetta and Elfin ones, they've got some good fonts going on
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Old 22 Aug 2023, 18:12 (Ref:4173677)   #7
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Not sure if the Lotus one is period, it doesn't seem right.
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Old 22 Aug 2023, 18:15 (Ref:4173678)   #8
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The Ford Racing one confuses me a bit, I can't see why an official Ford product would exist with that logo on for this engine, They didn't start using that logo until the 2000s and I can't see an application at the time for the crossflow/valencia in Ford backed motorsport.
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Old 22 Aug 2023, 18:17 (Ref:4173679)   #9
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There's quite a few Lotus/Caterham ones which are all variation of the same.
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Old 22 Aug 2023, 18:18 (Ref:4173680)   #10
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Final 4. The Ford lettered one is in a TVR, one of the few cars which used the engine but didn't disguise it with another rocker cover.
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Old 22 Aug 2023, 18:19 (Ref:4173681)   #11
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And that's it so far. I've heard rumours of one with ROWLANDS or ROWLAND on but can't find a picture and I think there's a Vegantune one but can only find images of the twin cam heads they made for the Kent blocks.
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Old 22 Aug 2023, 19:10 (Ref:4173693)   #12
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Found the Rowland one and several others while I was looking!
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Old 22 Aug 2023, 19:32 (Ref:4173698)   #13
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Purely a guess, but could the oval Ford one be from a Formula Ford engine that may have been prepared by Boreham or possibly just created for an entry by a Ford dealership.
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Old 22 Aug 2023, 20:09 (Ref:4173702)   #14
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It’s a good question Mike and I’m not sure on the answer. I think by the time Ford Racing existed the cars were running 1.8 Zetec engines but them my ex boss raced a Spectrum 011 which I think was a 2008 or 2009 car with a crossflow. With that in mind you might be correct.
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Old 23 Aug 2023, 01:46 (Ref:4173713)   #15
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Lol'd at the 'Lucas' one.
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Old 23 Aug 2023, 07:59 (Ref:4173730)   #16
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I think that the Superspeed one is on a pre-crossflow, not that that makes much difference.
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Old 23 Aug 2023, 08:17 (Ref:4173731)   #17
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I think that the Superspeed one is on a pre-crossflow, not that that makes much difference.
Glad im not the only one that thought that.... I wasnt confident enough to point it out though, and went down the doesnt make much difference route.

I must confess that with the pics it has sparked a bit of a nostalgia trip of "I had one of them on engine x or y" or equally 'so and so' who I might have competed against had others.

Throwback to Happy Days
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Old 23 Aug 2023, 08:43 (Ref:4173732)   #18
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It’s definitely pre-crossflow but it was the only picture I’ve found and I’m counting it!

I found 7 more last night, here’s 6 of them, the first one is MASS, it’s not too clear unless you zoom in. I think the Throbnozzle one is very recent despite having an older look.
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Old 23 Aug 2023, 08:51 (Ref:4173733)   #19
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Again, apologies for some of them being pre-crossflow but as you can imagine they’re not always easy to find pictures of so needs must.
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Old 23 Aug 2023, 10:21 (Ref:4173737)   #20
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Again, apologies for some of them being pre-crossflow but as you can imagine they’re not always easy to find pictures of so needs must.

To be accurate, in the latest batch, most of them are not crossflow.

As for the Throbnozzle version, if it is newish, it has not fared very well.
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Old 24 Aug 2023, 08:12 (Ref:4173805)   #21
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Almost certain this is one too but I can’t find any info. Looks like a 2 piece design like the Piper one, probably with built in rockers.

Honestly can’t believe I keep finding them.
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Old 24 Aug 2023, 08:41 (Ref:4173808)   #22
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Robin, this latest one is very obviously also pre-crossflow; the fact that you can see the carbs and the exhaust manifold on top of each other rather gives it away.
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Old 24 Aug 2023, 08:45 (Ref:4173811)   #23
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Yeah I should probably change the title at this point!
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Old 25 Aug 2023, 07:39 (Ref:4173878)   #24
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I think the Throbnozzle one is very recent despite having an older look.
Hi, Robin. If i'm correct, the one you named above is from a regular poster on here, Zefarelli. A french good mate just bought parts from John Wilcox. Could this help you? http://www.wilcoxengines.co.uk/xflow.htm
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Old 25 Aug 2023, 08:29 (Ref:4173888)   #25
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Hi, Robin. If i'm correct, the one you named above is from a regular poster on here, Zefarelli. A french good mate just bought parts from John Wilcox. Could this help you? http://www.wilcoxengines.co.uk/xflow.htm

Blooming heck, Gérard, Joe's racing services went straight over my head; of course it's him.

And here's another one of his pre-crossflow rocker cover:


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