1300 cc turbooxyboxer

[ruffbiker]

Bare with me after reading this title,I'll explain the plan behind the madness.
As you can see in the forced induction part of the site we have campaigned a 1200 turbo engine this year and it was quite succesfull. We ran a best of 15.25 in the quartermile in a 850 kg car including driver. The car was still driven everywhere (550 km trip was the longest). We went turbo because it's the cheapest way of going fast and took the 1200 because it was the only engine we could get our hands on. The bottem end remained totaly stock , unopened and unknow history. It was fun but we know it's gonna break, there's a weird knocking noise in it at stationary which disappears when the revs go up.
Being a lowbudget team we looked to build a new engine that would stand all forces we throw at it and be expandable in future years. We have a yearly budget so every winter it's choppingtime.
An old wasserboxer laying around sounded like a cheap base, we have the abbility to do some machining ourself and do the rest at a cheap rate so...
Why a 1300? The turbosystem is designed for a very small displacement (piping diameter, turboflowcharacteristic, throttlevalve) and we want to use it all again for now. The standard 69 mm crank from a wbx gives 1300 with the 77 mm cilinders from a scraped 1300. Some standard rods and the dual port heads we we're already using. These are now converted to twin spark and will be controlled by a dta enginemanagement system in my possesion. Fuel is a propane/butane mixture (lpg) available in europe at some pumps. It has a octane rating of 110+. That's we had so much power. It's far more easy then making carbs boost sensitive to, walk in the park. The fuel never go's to liquid form either.

Now for the oxypart, I'll give you my plan of attack and hope for some usefull input.

We have a running 1900 wbx. it's the late case engine, we had 1900's all the way through. Open the engine up and check what can be reused. if possible we reuse crank, main bearings, flywheel( fits beetle trans), oilpump.
New parts will include fk 41 cam with 1.25 rockers with new bearings. Case will be converted to type 1 lifters probable with standard lifters because of cost.
New bearings on used 1300 rods.

The waterjackets will be milled away and the studs relocated to type 1 pattern. Aluminium rings will be turned to fit the 1300 cilinders in the case, deck can be adjusted by the combination of these rings and machining of the bottem of the cilinders. Aiming for 1.2 mm deckheight
This will make compressionratio about 7.4.
Heads have been cleaned up in intake and exhaust and will be machined for dual springs.
We will try to use standard pushrods made to lenght.
A sandwichadaptor will be used between the case and the oilfilter for oil to the oil cooler The cooling will be done by a type 1 oil coiler placed in a type 1 fanhousing. We will make a mount for this that will place it right and feed the oil in the same time.
The turbo oil will be taken by the pressure sender location and return is where the fuelpump used to be.

some questions to get the advise started.

I hear the pulley sits further out of the case on an oxy in relation to a type 1. How do you deal with this when mounting the type 1 cooling tin.
Will the standard 5 bolt flywheel arrangement hold up to dragracestarts with something of 150 hp?
what do you think about the camshaft.

And yes, all of this is for real and must be up and running before summer starts so we can burn rubber again.

greatings

jesse

[buildabiggerboxer]

great, do it. something different and sounds well thought out.
more cam.? you can now rev more. E6210 with more dual lobe seperation about .500 lift with 125 rockers ?? but hey you know your own stuff..
use about 11 inch push rods, T1 lifters are deeper.
use a 3 bolt pump, wasser pump is 4 bolt.
5 bolt crank is o.k, just, to 200 h.p, but dowelling means you can sleep nights, at least fit porsche bolts ,or preferably BAS bolts, torqued to 90 lb.
228 fly and clutch goes in with careful clearancing but lots of it, especially by the clutch arm
area and starter hole., it will hold 150 plus, more with a sintered race disc.
228 flywheel can be chopped to 8lb, wasser fly is forged.
nice thick 1300 liners mean good boost levels, use plenty of valve spring pressure.
fit piston oil squirters to up your boost levels. search forum for info on this.
loose 50 kg off the car, loose seconds of your e.ts, its way to heavy, if necessary, buy a trailer.
good luck, cant wait to see it, any build pics ?

[ruffbiker]

I'll post some pics this week.

I didn't think about the pushrods yet, thanks.

The oilpump was an other good point, didn't think about that either

Last year we ran boost at about 1.4 bar. A little bit of ping in forth gear though.

We will install doublel springs, probably bergs, heard they we're among the best.

Loosing weight was on the list too, we'll be fitting plastic windows and removing all steel that can be missed.

Thanks for thinking along

[fastback]

please keep us updated!

[ruffbiker]

Thanks for the interrest fastback. Is the car in the avater yours? If it is I camped next to you at scc last year. Stian was so kind to be my host when I flew over. It was a great meeting and all I could think the entire weekend was the fact that I had a racecar at home and not at the track. If all goes wel I make some passes at scc this year. The plan is to drive the car over there. Can I get liquid propane gas in norway and finland that you know of? I do plan on taking an insurence for breaking down so I get towed back home just in case. Since they cal the track at gardermoen a trannybreaker and all.

[fastback]

u are right! i had the Squareback and the Ambulance/WBX turbo there yes
glad u liked the event, we are looking forward to SCC 2010 already .
LPG is available i norway som places.
there is actually a Gas station near Gardermoen that has LPG
here's a link (in Norwegian) that shows the LPG filling stations:
The strip only takes the Type1 trannys the type2 holds up!

http://www.dinside.no/6674/listen-over- ... er-i-norge

[ruffbiker]

Thanks for the link
Got a type two tranny lying around but not for next year.

[ruffbiker]

So I told you guys we we're going oxyboxer. Here are the first pictures.
Case registers are reduced by rings to fit type 1 jugs and threads in case have been moved to fit type 1 heads.
In this case it will be 77 mm cilinders and 1300dp heads with twin plugs. The crank will be 69mm from 1900 wbx.

[Unkl Ian]

Nice work.

The twin plug heads sound interesting.
Are you adding the second plugs yourself ?
Can you post some pics ?

[ruffbiker]

I'll post pics of them next time the heads are off.

[63busguy]

updates?

[Poloeins]

Hello i am the German Guy from Budel;-)

[63busguy]

love this!! hot rodding at its purest.

I would like to know how it held up this season. I would like to build something similar myself and wondering more about the turbo/propane induction itself.

Please update.

T