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Hi all

Well I thought id start a thread on my new NA project.

I have owned my golf with its vr6 for 4 years now initially stock AAA, then on megasquirt for year , megasquirt turbo for 2 years and now im coming to a conclusion with a N/A build.

The reason for doing this is its well proven and very easy to make good power with a turbo set up so I want to try something different.

My goal for the project is a minimum of 280hp and anything over 300hp from the 2.8 block will be seen as a success!

I have decided to go for a 24V block as after looking at the design of the 12v it did not look like it would be good for a NA build.

So far I have the head and the block and the throttle bodies are on the way.

Pictures of the block :

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Thought I would put a bit of paint on the block just to tidy it up :

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And finally the cylinder head:

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Probably going to take a few months to complete but hopefully worth it in the end!

The main problem I am having so far is finding a good set of cams. I have had a look at the schrick 272 272 but im surprised by the lack of valve overlap which I really want to take advantage of with tuned intake and exhaust.

Any suggestions much appreciated!

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The throttle bodies have arrived.

403949_10151241708358098_77856683_n.jpg

They can be individually split so going to have a look at getting the spacing and making a linkage/flanges all drawn up this weekend. If anyone is interested in any of the flanges at all send a PM.

Anyone know of a good method to block the injector holes but be able to use them again later ? Could be interesting seeing the different results between the injectors mounted in the head and further up stream.

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are they triumph speed triple throttle bodies?

They are from a Triumph but not sure if it was a speed triple. The capacity of the bike was 900cc I believe they are from a 900f?

Good idea on Schimmel' date=' will have to investigate. I have decided to get the car up and running on standard cams to start with in order to get a half decent map so that I can run in the new cams once they are fitted.

So first of all I mocked up the throttle bodies to see how spacing was to the head.

[img']http://a6.sphotos.ak.fbcdn.net/hphotos-ak-prn1/553821_10151252361283098_922993642_n.jpg

Unfortunately they are too wide unless I run bent runners and then each set would have to be offset at an angle. So I took them apart to see what I could do about the spacing.

431830_10151252361143098_580615968_n.jpg

I did want to mount them sideways but even with the linkage removed I couldn't get them close enough together. This means that I have had to turn the bodies 90 degrees and remove some of the injector boss. I will eventually remove it all as if I do go for a second stage of injectors they will now be mounted at the bell mouth entrance.

557036_10151252361003098_1913537240_n.jpg

Next step is to design a chain/belt linkage across all of of the throttles with a tensioner. This way I can just connect the cable to one throttle. As you can see they are all angled which is not what I was hoping for but it does have a nice smooth transition in the body at least.

If anyone knows of any second hand dry sump pumps for sale would be interested.

Hopefully get more done next weekend, too many f1 & motogp distractions.

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Finally have made a mock template for the throttle body flange which looks fine. Now just need to draw up an exhaust and normal intake flange and get them all made in metal later this week.

391493_10151269538703098_1101049645_n.jpg

Started to take the head apart to look at the variable cam gear and how I can lock it into position, also looks like if I want I could mill the locking position into the new style cam and then just use an old cam gear from the 12v engine.

563416_10151269538558098_1131173881_n.jpg

Either that or I could make a plate up that clamps on the end of the adjustable gear which would then allow me to manually fine tune it.

Or simplest option may be to just have it welded up in a locked position.

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I'll be keeping an eye on this. A throttle bodied vr, one of the worlds greatest noises. How come you didn't go for something like jenvey bodies? Was it purely cost or is there that much potential from bike bodies? Either way must have been hard to try this instead of a 24v turbo :)

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Im running a standalone ECU on the setup so wont have the factory controller for it.

I have not had a look at Gareths setup. Could be interesting to compare at the end though!

The reason for bike bodies was cost as this is an experiment at this stage really. The most I could be lose is say 10 ? 15hp and even then I highly doubt that much. If I dont meet my power goals then I will look into other options.

Yep I need to start getting in contact with some cam companies, will be starting it up initially on the stock cams anyway to get the base map sorted.

Yep there is a bit of an angle but luckily fairly smooth transition within the body itself. Plus as the engine sits to one side in the mk2 should direct the trumpets nicely above the radiator.

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  • 11 months later...

Updates will be coming slowly. The na lump has been sold to a friend who is building high horsepower vrt quattro setup. I will create a new thread for harry soon which is currently stripped back also but hopefully be at inters or bug jam.

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