Cool! Tnx for the pic and article. We just need to be carefull not to seem as if we are 'trying' (although a watercooled engine is not trying of course..)...:rolleyes:

I think I am pretty close to a decent placement with my old wing I tried a few years ago. Could maybe just be a tiny little bit wider with a bit bigger end plates. Plenty work to do this winter :)
http://i174.photobucket.com/albums/w...03/DSC_281.jpg

And yes, good airspeed is always important ;)

Ive been following the latest comments here recently as I find the aerodynamics of a bug quite interesting.Have you got any pics of the rear or underside of your car Spannermanager.

Hi Mate, nothing with any detail, black just makes a lousy picture as all the detail is lost, this rear shot is curtesy of the apex festival,but its hard to see all the venting, the Red Maguire Imp is also exploiting open deck theories. I run various fairings underneath, all a bit crude as they get damaged often when running low to the deck, its smooth underneath all the way through to the rear torsion housing and rear ARB where there are more fairings, the ARB and mountings have to go next, Porsche style mounting is no good on a track car, its far too low, there are no jack points or lower 'a' arm shock mounts either, the a arms are flipped to improve the camber, nice and clean for the air, it will be flat bottomed right the way through over the winter, special parts are a pain in the butt when they get damaged!! you have to start all again, you also have to plan your hard points to jack the thing up quickly, and also carry ramps to meetings etc etc. I love it all tho', :)heres the Apex link,http://www.apexfestival.co.uk/event/Circuit_Racing.html

Just got back from Dyno-day (BTW 564 Nm = 418 lbs.ft) :):
http://i174.photobucket.com/albums/w...4.jpg~original

Wally is that wheel or adjusted at engine regardless very impressive and unbelievable.
Congrats
Alex

Thanks; thats corrected to flywheel-hp. A healthy totally stock 1584cc T1 with just cheap header exhaust made 55 hp and another stock 1600 with electronic ignition made 52hp, so the dyno seemed very well calibrated.
I think it turned out to be about 15% correction iirc, so its about 400 RWHP for you guys ;-)

Well done Wally.

Wow! 564NM!! It seems the new cam did make a difference.300NM at around 3600rpm! I bet it pulls like an elephant on crack....
Well done Wally!!

is the small dip at 4000rpm the cam coming on? my n/a engine has the same small dip at 4000rpm as it comes on cam. very good numbers and i hope we can match your numbers with our new engine.

Calling that a dip or even a small dip is somewhat eggagurated perhaps, but I think I understand the spot you mean.
But no, thats not the 'cam coming on' imo. Cam comes on much sooner then that, as does boost. I'am sure I can tune that out if I wanted to, but it would be for visual pleasure only. Its not like you feel that minute change in rising rate hp-climbing ;)

I think the engine is now 'perfect'. Early super high torque and very high hp when you step on it some more. It does everything you throw at it. I wouldn;t know what to change or what would make it better. It also picks up from 1200 rpm onwards in 3rd gear (mine is a long one too) crawling through town.
So, I was thinking of selling the engine and all ancillaries that make it work (for way less then the parts cost alone) to finance my new '36hp Challenge' -love and I would also love to see the Apfelbeck-project through someday.
Not sure if there is a demand though.

So you´re selling the engine now that you´ve reached your goal,do I understand that correctly? Although building a Challenge motor is a ton of fun,I think you would regret selling the T4 because it does do everything! It´s reliable and incredibly fast.Besides,if Thorsten actually does make a type 4 version of his heads,which he will it seems,I think you could unlock even more horsepower.....just to scare yourself :D

Not exactly. More because I want to reach other goals which need an investment and this would be the only way to get there.
I would love to campaign this engine through next years TimeAttack competition because its perfect for it.
Also doing that illusive 10-second 1/4 mile also seems just a matter of going to SantaPod once more.
I don't think it will happen tbh and maybe, just mabe, developing our own T4 OHC heads might even be as rewarding as it is for Thorsten to build his own WBX heads...:rolleyes:

I would really like to see the Apfelbeck heads make it to the market! Building an Apfelbeck headed T4 turbo would be really awesome! Hopefully, you'll keep this engine, but it would also be interesting to see what your next project will be.
Now that you've tasted some racing blood I'm sure we will see your next project on track!

No, you got it all wrong: its not about taking it to the market. That will even less likely to happen. I/we just want to finish the project and see what it will be like to hear it run at high rpm and see the hp/ltr figure from the dyno.

It will also surely be N/A for a long time because of the hp/ltr testing, but we're getting way ahead of each other here. The end of speculation better stop right here.

Easy Wally....I didn't want to stir anything up or start any speculations so sorry if something got lost in translation.I just said I would like to see them on the market! How am I supposed to know what the intentions are for those heads or that project is? It will be a very interesting developement for sure and I hope you'll share it and post.

Ok, I just didn't want to leave the impression that this is a commercial venture of some sort. It isn't. At all.
Good thing we cleared that up. Sorry likewise if I came on too strong. Its a senstive point obviously ;-)
You know I will post any sh*t here first. It adds a lot to the fun to share.

No worries mate! All is good!

Wally, do you have or can you take some good photos of how your intercooler is mounted. I've been going back and forth about air or water and I want to see how you mounted your intercooler. I've been going through different designs in my head but I think they would be flimsy.

Taking a picture is difficult atm. A mainly one sided attachement will always be perceived as flimsy I think, still it holds up for many years without fractures. The other side is incorprated and attached to the duck tail end too of course, but that only does so much.
The intercooler is a strong bar ans plate one with 2 welded in fat M8 studs both top and bottom. The bottom row I connected with a hollow rectangular tube and that (with two braces) is attached to the original hood hinges.
Thats about it..;)

I might try and do a similar intercooler setup but I'll have to do something with my case/head vents. I wanted to see how you did the bottom mounts for the intercooler, but the pics you have up don't show the mounts cleanly. Are you using steel for the IC mounts and then going to the hinges, or going to where the hinges mount to the body?

I saw this picture on Facebook.
https://fbcdn-sphotos-d-a.akamaihd.n...70315201_n.jpg

Do you have more pics on your car with that wing mounted?

That seems to be an older pic,it has the gold 18" wheels.

Yeah, that was about 1997 I think when the 2,7ltr T4 was still in there..

http://www.keversite.nl/fotoalbum/fotos/66021.jpg

http://www.keversite.nl/fotoalbum/fotos/66022.jpg

http://www.keversite.nl/fotoalbum/fotos/66020.jpg

Cool! That was at the parking lot of the Nürburgring (2007 or 2008 I think) ;)

https://www.facebook.com/photo.php?f...type=1&theater

:cool:

Current pictures ;-)

http://i174.photobucket.com/albums/w...4.jpg~original

http://i174.photobucket.com/albums/w...b.jpg~original

Looks awesome Wally!

What rear spoiler is that? Sorta looks like Dr Holzapel(sp?) one on that race bug.

Yeah, its a one-off Gerrelt made me, but it took so much time, that I'am not sure if he wants to make another anytime soon...

Any thoughts on what the front fender slots and the "wing" did for you? I'm really interested in the front fender slot feedback, not sure I could pull of the rear window wing but I'd love to know how it works.

Jason

Sorry Jason, I can't tell what effect the fender slots in itself have or had. Neither with the roof extension as I only drove 10 miles or so with it when the current 1192cc type 1 compound turbo engine seized...

I am going to build another turbo type 4 for next year as with my long 1st gear, that small an engine is no fun driving on the street.

Looks great Wally! What size T4 turbo are you building? I have a brand new ball bearing Garrett GT3582 sitting here that I am not going to use..

I hope the engine will be 1,9 or 2,3ltr and I will probably use the turbo from the 2,2ltr to keep costs down.
Tnx for the offer though.

your 2 liter engine
 

Walker, what happened to your 2 liter engine that you ran for about two years now.

Sorry man, but I only have recollection of 1,2ltr and 2,2 N/A and 2,2 T before that?

A true bad boy, very cool!
How does the 1.2T perform?

The idea with the small turbo feeding the big turbo worked, as the boost rose super gradually when the big turbo came on after the small one reached wastegate boost, but I seized the engine right afterwards...
So I don't have any more impressions then that one time dual spool-up of both turbos.

Oil supply to the crank and bearings seems to be the largest weakness of the 1200 Motor. I wanted to drill the oil gallies to 10mm and enlarge the holes in the bearing saddles.My idea was to build a compound system with an eaton compressor and turbo.However, it's another costly project that gets in the way of my type 4 turbo project and reliability vs. cost vs. horsepower isn't feasable consideringmy experience with the 1200 challenges in the past.Maybe someday I'll pick it up again and invest into it.

Yup, you're right! :)

If anybody wants details on how I made it, just say so.

I'd love to get details on the roof spoiler and the rain gutter panels you made.