Hugh's 1987 505 STX V6 Project

By diyauto
( 4 )

4 minute(s) of a 40 minute read

11-2-2019



From the Auto Hebdo article I scanned and uploaded elsewhere on this site:


11-2-2019

You are quite right, Mike.  My attitude is that there will always be someone out there with something faster.  There is a point of diminishing returns when it comes to the horsepower wars, and honestly what is the point?  The car will be plenty fast with around 200 bhp, and will still corner better in the real world than a lot of current cars.  That's good enough for me.  I think, as you say, an homage to the original Danielson V6, that respects the essential character of the 505, will be best.  At some point it's not a 505 anymore.

Thanks for your input, SRDT.  From what I've read, the Danielson V6 achieved its 195 bhp in part by running the 2.8L (2849 cc) version of the PRV engine to 7000 rpm.  That was with the standard 91 mm bore and 73 mm stroke.  The horsepower peak occurred at 6500 rpm as I recall.  I have a slightly different idea in mind, combining a 3.0L (2975 cc) Eagle Premier block and heads with the short-stroke crankshaft from a Renault 2.5 Turbo V6 (Z7U-T30).  This will give a displacement of 2568 cc and the same piston speed at 7000 rpm as the standard-stroke engine experiences at 6000.  The engine may or may not use forced induction - I haven't decided yet.  Turbocharging or supercharging is nice where I live because of the high density altitudes we get in southern Alberta, but I'm attracted to the idea of a high-revving NA engine for this car.

Apparently you can still get performance camshafts for this engine.  I will need to do some more research.


5-8-2020

With spring solidly under way and the snow gone now, I have determined to make some significant progress on this car this year.  The project has evolved into something that will be quite unique once it's finished, and I am at serious risk of "paralysis by analysis" particularly with respect to the interior choices.  So I've decided to begin by removing what I know will come out - the worn-out carpet, the sun-baked dashboard, all that.  With the car stripped down to its shell, I can then decide how best to proceed.  The question of which dashboard to use may simply come down to whether or not the correct mounting points for the Phase I dash still exist or can be easily added in a Phase II car.  I don't have an answer to that question yet.


5-9-2020

I hope to make progress on all fronts this year.  I may just put a new interior in the STX and get it roadworthy,  and not worry too much about modifications until I have the engine built for it.  At that time I might make a bunch of changes but for now the easiest thing to do is to just fix what needs fixing and have a nice, running car I can actually use.  As for the 406Cs, I now have four, although one is still in Ontario and the other two are still in the UK.  I eventually want just two for myself, so one will get sold, one will become a parts car, and two will stay.  Until I get  all four in the same place at the same time, I don't know exactly what I will do with each, but I have something of an idea now.  The goal for this year is simply to fix and sell a few of the cars I already have, and bring home the four cars that I have stuck in other countries at the moment.  That and have at least one Peugeot that I can drive daily during the summer months.  If I get all that done, I'll call it a good year.



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