Slowly my build begins...

Mr. Motorhead · Posted: Sun Feb 02, 2014 12:25 pm Post subject:

Something I see missing here is what the general purpose of this engine/car will be. Is it to be a second or third car that is being built with the "fun ride" mind set that won't be driven more than about ten miles in a whack? Or will it be driven daily or semi daily with some 150-200 mile runs thrown in? Or perhaps a commuter type road warrior? As we all know, the weakest part of the whole 36hp platform is the valve train........it is what it is.

pig-pen · Posted: Sun Feb 02, 2014 1:34 pm Post subject:

cool, thanks for that. It has helped. I guess this is a minefield that you can only find out about by walking into it...

So i have 2 options, I am using stock cam and 1.25:1 lifters

AEA525 which will be 73.5 lb seat, 125.5 lb @ 0.25" lift, and 138.5 lb @ 0.31" lift with ratio rockers

or... I can use the outer spring only which is rated at 35 lb seat, so I am guessing (will have to check in the morning) this will behave correspondingly with the above, giving 65.95 lb @ 0.31" lift. This is not enough right?

sheesh! Confused

there are stronger dual springs too, so I could look at just using the outers on them... giving me more options.

my big question is what will the stock cam and ratio rockers allow me to use???

pig-pen · Posted: Sun Feb 02, 2014 4:37 pm Post subject:

to answer your question mr.motorhead, it is a fun weekend car that will be used for long runs too to 'bad camberg' and the like... so 300miles plus over a few days.

my main purpose is fun, more grunt and speed in modern traffic and some kind of longevity... and a run at the land-speed challenge here in the UK too.

thanks all for the advice so far... much appreciated.

pig-pen · Posted: Tue Mar 11, 2014 4:57 am Post subject:

A small update.

Heads back from welding (there were a couple of broken fins) and adding some extra meat around the intake port before it is machined down a little.

Here are springs / valves / caps / collets etc.

Image may have been reduced in size. Click image to view fullscreen.

Now off to machine shop for new seats and spring height set etc.

pig-pen · Posted: Sat Jun 07, 2014 12:19 pm Post subject:

Picked up my heads from the machine shop today. Very excited to start building them up. Also got a very special little package from SPEEDWELL USA...

Valves dropped into place just to have a look...

New seats cut for the slightly wider valve springs and new BMW e30 guides.... and locators for inner springs fitted...

Inner spring in place...

...and outer spring. Hope this works!

Welded and cut back the inlet area... and notched the SPEEDWELL covers.

Manifold flange made... just waiting to bend up some pipe.

Back in the box for now... will put it all together next week! Can't wait but must!

markhuebbe · Posted: Tue Jun 10, 2014 9:01 am Post subject:

Where did you get your valve guides & inner spring locator? Are they still a stock 8mm?
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pig-pen · Posted: Tue Jun 10, 2014 3:06 pm Post subject:

Valves and guides are the stock 7mm size. Guides began as BMW e30, but have been machined to fit the inner spring locator, which is specific to the springs themselves. make sense?

pig-pen · Posted: Thu Jun 19, 2014 7:25 pm Post subject:

Heads done! Bench tests showed 87cfm @ 0.4" lift... pictures etc tomorrow

pig-pen · Posted: Fri Jun 20, 2014 2:34 am Post subject:

All done! Now for the rest of the engine....

henry roberts · Posted: Fri Jun 20, 2014 4:03 am Post subject:

1/2 again is a nice addition.

any chance of some close ups of the ports and chambers for us do it yourselfers? edit, I just looked back at the first page. Embarassed

henry roberts · Posted: Fri Jun 20, 2014 4:27 am Post subject:

pig-pen · Posted: Fri Jun 20, 2014 5:11 am Post subject:

I have no idea! Razz

I just went for some BMC ones that were the right length and not too crazy stiff... although much stiffer than stock VW. As Mr Motorhead pointed out... my cam might not last too long but we shall see.

I just figured if they were OK in an old A series engine then I might be alright, or I could perhaps take out the inner springs.... or whatever.

I am winging it a little.

pig-pen · Posted: Thu Jul 03, 2014 3:49 am Post subject:

So after musings on other threads I decided my best intake manifold would be a 1500cc single port, with some customisation of course.

Nothing new here I know, but my methods may make some of you laugh, so here goes!

As my motor is a long way form my home (the car is at shop being welded up) I had to try to adapt this manifold as best I could without it. Using a 30hp manifold I measured and measured again, plotting it all on some card.

Then I cut the 1500cc manifold just where it curves down into the ports, and turning these pieces was able to make them sit flat like the 30hp and not at an angle as the original did. With a bit of a twist on one side too I was able to do this and match the offset of the 30hp heads perfectly (ish)...

So to hold it altogether I had to make a jig of sorts to take to my friends for a couple of tack welds... and after many failures I saw my son's duplo lego lying all around me on the floor... so I used it!

the manifold was held off the surface at the perfect height, and orientation!

results as follows...

now all I have to do is weld it up nice, make it 40mm narrower and remove the warming pipe thingy.

I LOVE LEGO!

avus · Posted: Thu Jul 03, 2014 7:28 am Post subject:

pig-pen · Posted: Thu Jul 03, 2014 4:18 pm Post subject:

thanks!

I am a great believer in using whatever you have to hand.

At present the manifold sits 20mm higher than the 30hp so yes i will need to do something... my heads are machined down so I have a few mil there, and I can remove 10 from ends of the manifold, so in total I am going to be perhaps 5mm taller than original.

Also there is no plug wire tube to worry about, although I may try to make one fit if I can.

And yes, I thought the extra kick out would help give clearance as you say.

Now I need to get it onto a block somewhere! Rolling Eyes

pig-pen · Posted: Tue Feb 03, 2015 2:56 pm Post subject:

progress... I have been doing stuff, but mainly resto of body etc... focus now back on motor.

first up the dizzy, took a stock 36hp distributor had a resto done (found a good place in the UK if anyone is interested!) and put on a new can to advance on carb vacuum, and retard on boost from the manifold... came out very nice I think. Only giving 3.5º retard but I can adjust this when the car is set up on rolling road.

should help to stop the knock!

next up is my charger pulley. A bit of online-scrapyard (ebay) rooting delivered a pulley from a mazda rx8... the right size for boost I want and the right belt style too. Only it was too tall, so it was sliced and re-welded to sit as close as possible to the stock 36hp pulley. Also added some 'dogs' to locate in the 36hp holes.

question... should I weld through the bolt holes onto my original 36hp pulley? or use a big washer with my crankbolt?

or both??? the washer welded to the rx8 pulley?

opinions happily received.

cheers for now! Smile

avus · Posted: Wed Feb 04, 2015 3:51 pm Post subject:

pig-pen · Posted: Wed Feb 04, 2015 4:52 pm Post subject:

the vacuum can goes both ways... it has two inlets, one on each side.

not sure I follow on the pulleys... I will read again!

edit... ok, so it does centre on the middle of the stock pulley... and has the dogs through the holes too???

should I do more?

avus · Posted: Wed Feb 04, 2015 6:01 pm Post subject:

Kjell Roar · Posted: Thu Feb 05, 2015 1:30 pm Post subject:


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