D's or O's

Discuss and exchange views and technical information about our cars.

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dand
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D's or O's

Post by dand » Mon Jun 29, 2020 4:40 pm

I had a Scimmy Coupe back in the '80s that i did a lot to - overbored, powermax pistons, Burton "fast road" cam (can't remember which one), initially heads I ported myself then upgraded to Vulcan Stage 3 (didn't really seem that much better), DFI5, K&N, stainless manifolds and a Bosch non-vacuum distributor. Was quite quick for it's day!

My one regret was the choice of cam - always thought it could have handled a more aggressive one.

Now got another Coupe (1/2 share with a mate) and the plan is to build up a second engine and swap it out when complete. Issue is deciding on how carried away to get with the build!

As this one is going to end with new pistons anyway it doesn't seem too much extra effort to put some pockets in them. A quick Google seems to show nobody selling the non-vacuum distributor any more but I assume removing that from a standard one isn't too hard?

Main thing is that this car is going to be a weekend toy, so it can be a little bit on the wild side.



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Post by Drury » Mon Jun 29, 2020 5:35 pm

My 6a has the same Vulcan stage 3 heads, df15, ported inlet manifold, REx exh manifold, Piper 285 with matched Aldon non vac dizzy which I recommend.



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Post by Scim8tar » Mon Jun 29, 2020 5:47 pm

i think with the ignition technology available today you would be best following Phil's advise with one of the programmable options, if you are staying old school i would keep the vac and just limit the travel to what the engine needed, IMHO vac advance is the best load sensing timing control of it's time, I was running Mallory dizzy's with no vac on American car's 35 years ago and although great for performance, not good for crawling along traffic jams in summer.


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Post by rjudcsx » Mon Jun 29, 2020 6:43 pm

I recall a post on locostbuilders .co that had some views , just checked and its under the title Sierra v6 efi or weber 500 . May not be relevant but worth a look . Regards Richard .



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dand
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Post by dand » Mon Jun 29, 2020 7:35 pm

Thanks for the tips. But every time somebody makes a comment I can feel the budget creeping up by £500!! :shock:

Out of interest, what's everyone's thoughts on the cost to get to:

180bhp
200bhp
220bhp
240bhp

I'll make sure I'm sitting down before I look at the answers!



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Post by efi_sprintgte » Mon Jun 29, 2020 7:45 pm

If you want more then 180 maybe 200 then it’s a fully built engine with throttle bodies or triple carbs.

The likes of Ric Wood will give you a quote for engines with competition power levels.


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Post by philhoward » Mon Jun 29, 2020 8:49 pm

dand wrote:
Mon Jun 29, 2020 7:35 pm
Thanks for the tips. But every time somebody makes a comment I can feel the budget creeping up by £500!! :shock:

Out of interest, what's everyone's thoughts on the cost to get to:

180bhp
200bhp
220bhp
240bhp

I'll make sure I'm sitting down before I look at the answers!
Going up each of those steps doubles each time - not increase by £500...


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Post by Coupe Racing » Mon Jun 29, 2020 9:17 pm

240 plus is between 7 and 10k if starting from scratch and using new components.
I put together a shopping list once to justify the numbers to someone who didn't believe it


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Post by philhoward » Mon Jun 29, 2020 9:23 pm

I was going to say (optimistically) 1k, 2k, 4K and 8k for r those figures although getting 180bhp for a grand means you’re starting from a half decent running engine to start with.


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Post by dand » Tue Jun 30, 2020 7:59 am

OK, those numbers kind of match where I was hoping. There was a post on Pistonheads talking about £15k of mods that worried me a little!



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Post by philhoward » Tue Jun 30, 2020 8:08 am

I could be out by a factor of 2 - it’s been a long time since I’ve bought bits for (or even owned) an Essex engine. Triple carbs or throttle bodies and injection isn’t going to see much change from a couple of grand.

You can see why I fitted a £400 Omega engine with 220bhp..


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Post by Coupe Racing » Tue Jun 30, 2020 8:33 am

Triple 42 DCNF and a manifold plus trumpets and air box and setup could cost about 2500 .

I have a new manifold that has only seen trial fitting available but they are not cheap . Was going to mate it to a set of throttle bodies I have


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Post by gtcse8 » Tue Jun 30, 2020 8:43 am

Have a chat with Car Clinic in Darwen, Lanc`s.
essexengines.com

Only had limited contact with them many years ago, but they are highly recommended.


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Post by turboscim » Tue Jun 30, 2020 9:46 am

Consider forced induction, good top end, good in traffic



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Post by dand » Tue Jun 30, 2020 9:59 am

I do like the idea of triple Webers - they look superb - but the price is a bit high and are the stories that they are nightmare to keep in tune true? Is a Holley a more practical option?

I've never fitted forced induction so feel a bit out of my depth with that.

And I fancy this as a project for myself rather than giving it to garage to do. So picking Ric Wood or the CarClinic's brains when I'm not going to give them the engine to work on seems a little unfair.



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