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Author Topic: Blown Triumph sprint bike built by dslam - from scratch  (Read 26250 times)
Tony oily bike
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« on: January 05, 2016, 12:33:47 PM »

Following on from a different thread
http://www.mankymonkeymotors.co.uk/forum/index.php?topic=15282.msg214551#msg214551

This is a thread about dslams blown Triumph

My mate Andy (dslam) doesn’t like to blow his own Trumpet (geddit??), so following his post about the blown (supercharged) Triumph sprint bike that he’s built from scratch, I’ve put this separate post together, along with some photos of the build.

We went to watch our first Sprint meeting around 20 years ago (although I’d been to the drags as early as ’71), and within a year we were competing on a shared bike. The rest as they say………..

Andy started the build in mid 2013, as is the “Big Brother” to a 500cc normally aspirated Triumph that Andy has ridden for many years.

I’ve assisted at times in the build as tea-maker, cake-supplier, observer, constructive-criticiser, photo snapper, “hold this for a moment” assistant and occasional parts donator.

The basics of the bike:
Home built frame based on the 500’s frame, mated to a set of shortened lightweight forks with re-laced half-width (brake) front wheel, and modified and re-laced rear wheel assembly.

Engine & transmission – 650 pre-unit Triumph, taken to 750cc with reversed head, supercharged by an Aisin 500, running methanol fed by an early SU with remote float bowl (from a pre war MG if I remember correctly). Ignition is tuneable electronic. Gearbox is Norton lay-down running a modern NEB speedway clutch.

All the engineering and build work was carried out by Andy apart from the powder-coating and (correction, Andy painted it)  manufacture of the fuel tanks. The engine has now had some heat cycles, the gearing of the blower revised, and an issue with the inlet hose rectified, so the motor will shortly be taken down again and the initial rebuild double checked prior to being used on the strip.

Enjoy the piccies

Some tubes, some old forks, an engine and the start of the build. Engine plates are wooden mock ups.
« Last Edit: February 13, 2017, 12:16:12 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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« Reply #1 on: January 05, 2016, 12:39:22 PM »

The frame taking shape. Joints are brazed.
« Last Edit: January 06, 2016, 05:43:22 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
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Karma: 24
Posts: 4240



« Reply #2 on: January 05, 2016, 12:40:32 PM »

Rear wheel 'in place' for frame line up
« Last Edit: January 06, 2016, 05:43:37 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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Karma: 24
Posts: 4240



« Reply #3 on: January 05, 2016, 12:41:49 PM »

Frame completed except for a couple of small mounting lugs
« Last Edit: January 06, 2016, 05:43:49 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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*****

Karma: 24
Posts: 4240



« Reply #4 on: January 05, 2016, 12:44:07 PM »

Engine plates now made of dural and mounted in place. Note the blower at this stage is from a Mercedes, however this was changed later in favour of a smaller Aisin. Front forks and rear wheel now attached.
« Last Edit: January 06, 2016, 05:44:02 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
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*****

Karma: 24
Posts: 4240



« Reply #5 on: January 05, 2016, 12:45:55 PM »

The drive-side of things. Plenum chamber partially constructed.
« Last Edit: January 06, 2016, 05:44:15 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #6 on: January 05, 2016, 12:48:32 PM »

Another view of the LHS (still with old blower)
« Last Edit: January 06, 2016, 05:44:27 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #7 on: January 05, 2016, 12:49:11 PM »

More detail of the frame
« Last Edit: January 06, 2016, 05:44:38 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #8 on: January 05, 2016, 12:50:07 PM »

Wheeled outdoors for the first time to get a perspective view
« Last Edit: January 06, 2016, 05:44:50 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #9 on: January 05, 2016, 12:51:16 PM »

The lightweight NEB speedway clutch (nice piece of kit!).

The blower is now the small Aisin 500
« Last Edit: January 06, 2016, 05:45:01 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #10 on: January 05, 2016, 12:53:24 PM »

Drive for the Aisin.

A toothed belt was chosen, and pulley wheels modified to suit
Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #11 on: January 05, 2016, 12:55:35 PM »

Frame back from the powder coaters after had sprayed it.

Forks shortened.
« Last Edit: January 06, 2016, 05:45:41 PM by Tony oily bike » Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #12 on: January 05, 2016, 12:57:25 PM »

Rebuilt wheels fitted.

Sourcing a front tyre with a suitable speed rating and profile was still on-going at this point.

Rear tyre is a new M&H 4" slick, as used 'in the day'
Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #13 on: January 05, 2016, 01:07:29 PM »

A bit of a jump, but here Andy's bike is around 80/90% done.

Timing, final drive, rear brake, gear change mechanism all to be sorted, front tyre to be sourced, and the route of the feed to the blower also needed to be revised
Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
Tony oily bike
Hero Member
*****

Karma: 24
Posts: 4240



« Reply #14 on: January 05, 2016, 01:08:55 PM »

The other side
Logged

There's nowt as light as a hole, so add lightness.

Our lady of blessed acceleration, don't fail me now! - Elwood Blues

Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!

"Incontinence Hotline" - please hold.
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