Progress Update: How Is BCL's Car Going?

[bcl]

Very nice setup Brian.

I was suprised not to see a high mount setup like Spiko has. Maybe with his turbo there was no room to fit down in the standard location??

Looks Very nice. 

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Thanks. Obviously you have 2 design options:

1. up then down as I have for low mount turbo (Nizpro design)

2. down then up for high mount turbo

Available space is a key consideration, as is the position of all hot pipes, plus where the pipe to the external wastegate can be located, and how the pipe from the external wastegate can rejoin the main dump pipe.

You may notice the clutch reservoir has been relocated to the other side of the brake booster, as when it was in the original position the heat from the exhaust melted the plastic cap so that it welded to the container .

Nismo? 

Just out of curiosity Brian..when this project is finished, are you ever going to drive it? :D

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They probably had a spare cap lying around the workshop. The rest of the alloy water reservoir was hand made by Simon.

The project will finish, and I will drive it. I'll soon post pics of the CV's components to show what's holding it up.

I think you burnt your matting under the bonnet, have you been trying to get it red hot like the nizpro dyno video fantastic looking manifold the design speaks for itself

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A modified bonnet will definitely go on, of V8 type which is raised,and probably something with venting to release the heat.

Brian

[Ralph Wiggum]

Looks very very nice Brian. Can you shed any light as to why Simon has decided to run a BOV on your car? Is the throttle body adaptor a one off for your car or something he plans to release.?

thanks

Luke

[bcl]

Looks very very nice Brian. Can you shed any light as to why Simon has decided to run a BOV on your car? Is the throttle body adaptor a one off  for your car or something he plans to release.?

thanks

Luke

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That BOV was fitted almost 3 years ago; that was my choice, and did not form a part of the stage 3 Nizpro kit back then. I don't know about the adaptor; you'd have to contact Nizpro, as I believe it is a part of the standard kit.

Brian

[bcl]

Below I post detailed pictures of the CV joints, how they fit together, and where they can fail.

The inner CV sits between the diff and the half-shaft, and quite a few people have reported failure.

The inner CV has 4 parts, the large cup, attached to the ½ shaft, and inside this cup are 6 ball-bearings, the cage, and the centre piece (I don’t know if it has a name), which is attached to the diff. This centre piece will move continuously as the suspension moves.

The 4 parts are below, pulled out of my car during initial evaluation.

The groves in the cup show where the ball-bearings can move.

If we place the cup on it’s side, then upside down: You can clearly see the splines as they fit into the ½ half shaft. This is a potential weak point.

The centre piece sits inside the cage, which sits inside the cup, and the ball-bearings sits inside the slots in the cage, and between the centre piece and cup. Only one (not all 6) ball-bearings is shown in the picture.

If you look at the inside of this centre piece you can see the slots where the shaft from the diff will slip. This is another weak point. I think it was Craig who reported that his CV was spinning freely, and this would happen if the metal fatigued here.

Nizpro first had a strong cage created initially, as shown below. When people report that the cv’s exploded, and there were “ball-bearings over the track”, it is the cage that has exploded, releasing the ball-bearings. This appears to be the cv’s weakest point.

New cv’s had just gone into the car prior to BVW1 for me to drive around in, and then a month later the cv’s were pulled apart. Nizpro had detuned the car for me to drive, as they were concerned about the cv’s. I was at Nizpro late last year just after they pulled the cv parts out of my car for inspection.

You can see the crack that is starting to develop in the centre piece, with what was a brand new part after a very short time. This is an accident waiting to happen, and why my car won’t be driven until something much stronger is installed…. Still waiting!!!

Brian

[F6 UTE]

Thanks Brian!! I don't think we've seen a detailed explination of the CV failing before..

Have you considered fitting a 9" or similar?. going 1 step forward, 5 steps back, to try and go forward, so to speak..??

[Muzza]

Since extractors have been discussed this week, here is a picture of the extractors fitted on my car.

They are normally covered with a heat shield.

They are very large diameter, and support high power. Many people have probably seen the video of them glowing red in the Nizpro dyno video when fitted to the other Nizpro engine.

The Tial external wastegate is also shown in the second picture, and this feeds into the 4" dump pipe.

Brian

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Got a bit hot under the bonnet Brian??

Sad isn't when that's the only thing people can find wrong.

I'm so jealous.

Muzza.

[bcl]

Add the heat shielding, and it looks fairly innocent and very neat... you have no idea what's there ... honestly officer it's stock.

Brian

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[Falchoon]

Thanks Brian!! I don't think we've seen a detailed explination of the CV failing before..

Have you considered fitting a 9" or similar?. going 1 step forward, 5 steps back, to try and go forward, so to speak..??

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How about a Skyline rear end like Simon is modifying for the ute?!

[JBomb3000]

That manifold is a work of art Brian, can't wait till she's ready to be driven.

[bcl]

Have you considered fitting a 9" or similar?. going 1 step forward, 5 steps back, to try and go forward, so to speak..??

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No.

I have to consider:

1. What is the next weakpoint

With stronger CV's and much stickier tyres it may well be the diff.

Simon at Nizpro recent broke his diff at Calder, but at this stage very few have run big power through their drivetrains.

2. The car is not meant for drag racing

Not like Spiko who's main objective is a drag car, and running slicks, so far more stress on cv/diff

3. How much more money to throw at this

Not much atm.

As for "going 1 step forward, 5 steps back, to try and go forward" this is often the case, but I do know that it is foolish to break something that is the current weakpoint, replace it with the same part, then expect it not to break again. Replace it with something stronger, then see what breaks next. It may not be what you expect ... but then again, it probably will be.

Brian