Quiet Exhaust for a 2095cc Type 1 in a split

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seablue67
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Quiet Exhaust for a 2095cc Type 1 in a split

Post by seablue67 » Tue May 12, 2015 3:19 pm

Hi All

I'm going to be building a 2095cc engine (78.8x92) for our split.
Not a wild motor and at the moment will be mexican EFI run single throttle body (yes small, but its a family camper to I just need torque)
Will be keeping heat exchangers (large bore)

What exhaust system would you recommend that is as quiet as possible?

I remember a ghia a few years back that ran low 13s/14s that was almost silent in the burnout box at Santa Pod, anyone know what system they had or made?

We use the bus for camping trips with young kids so we don't want to be deafened with low and loud exhaust notes.

Quite happy to build a system myself but no idea which boxes would make it quiet?
Any one done something similar before.

Thanks for any replies/thoughts/suggestions

Rich


MarkFer
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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by MarkFer » Tue May 12, 2015 3:36 pm

I had a mild 2007cc engine with the Mexi efi setup. It ran but the rolling road guys said it needed a bigger throttle body/more air to get the best out of it. Currently the efi is transferred to a 1600cc until I find time to rebuild the 2007cc engine (long story). Biggest pain is setting up the cold start.

When I do finally get there I will fit a larger tb and at the same time measure up the mexi inlet manifolds etc as they will probably need opening up as well, if possible.

Vintage Speed standard exhaust worked well on it.

Mark.


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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by seablue67 » Tue May 12, 2015 4:11 pm

Thanks Mark, yeah cold start is a pain I have EFI on my bug so know the difficulties well.
Did the 2007 drive well? Can always get more out of things but simplicity and driveability is more important in a camper I think.

Was the vintage speed quiet in the bus?
Rich


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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by MarkFer » Wed May 13, 2015 9:50 am

2007cc - storming! There are a couple of local hills that the 1600 slows down on (a lot). The 2007 just powered up them in 4th. Its torque curve was essentially flat from 2000rpm - about 80 lbft from memory.

The VS exhaust was reasonably quiet. I spoke to Lee (VS owner) about whether he would make an even quieter one but he said his testing ended up with that design as a good compromise - any quieter and he said the power started to reduce.


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seablue67
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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by seablue67 » Wed May 13, 2015 10:53 am

That's great to know thanks Mark.

Anyone else got any ideas for a quiet exhaust system?


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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by MarkFer » Wed May 13, 2015 4:31 pm

A question back to you - where do you have the oil temperature sender in your bug efi setup? Mine is in the rocker cover but I don't think that is ideal. My oil temperature fluctuates too much - it can easily show a drop to 60C, or less, as soon as I get up to speed on a fast A road. Then I stop and it quickly goes back up. I've not convinced its location is optimal.

Mark.


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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by seablue67 » Wed May 13, 2015 4:34 pm

In the top of the remote filter mount. Nice and stable, showing the temperature of oil going back to the gallery.
One of the best places I think


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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by MarkFer » Wed May 13, 2015 4:55 pm

Does your remote filter mount have a tapping already or did you have to tap it for the sensor?

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Re: Quiet Exhaust for a 2095cc Type 1 in a split

Post by vwJim » Wed May 13, 2015 9:17 pm

Most of the filter heads will take a thread tapped into them Mark.

I usually fit the sensor in the universal case blanking plate or the sump if it has a deep sump. Makes it easier for servicing too, as the cable isn't in the way.

I've also seen them mounted in the air flow coming off the barrels, which must be a pretty good place for "cold start" warm up mapping as it will react to true warm up rates rather than the lag in heating the oil.
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