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Posted: Sat Feb 02, 2008 2:27 pm
by norma
stylussprinter wrote:norma wrote:Right, I've got the 304 stainless sorted. I've got a top notch welder guy willing to come round to my house and weld the thing up for me. I've also decided to make my own collector - (I'll leave myself a few days to do it in
)
The next bit is the toughie - how the flip do I make sure each length is exactly the same - I mean I realize that the best way is to start with 4x40" lengths and keep each length seperate for each cylinder BUT how on earth do I decide upon routing the damn pipes to ensure they all come out and meet nicely at the collector?????
Anyone get any good ideas? Rob - any chance of some piccies of yours to give me a head start???
Thanks boys......
The obvious start point would be the furthest away port first . That one would be quite straight then the others in order of their distance from the collector . That way it will be easy to gradually lose length in each one by looping it. Whatever length that first one is within the 28 to 32 '' , you can then follow ---------- doddle
That's what I was thinking - although your use of the word 'doddle' may be a bit optimistic!
Posted: Sun Feb 03, 2008 3:41 pm
by DH2
Why not do it to scale using some stiff wire or something? It will allow you to play around with various configurations until you are happy it will fit, then upscale it to the real thing.
An almost useful first post! <waveshello>
DH2
Posted: Sun Feb 03, 2008 8:43 pm
by norma
DH2 wrote:Why not do it to scale using some stiff wire or something? It will allow you to play around with various configurations until you are happy it will fit, then upscale it to the real thing.
An almost useful first post! <waveshello>
DH2
Hi DH2 and welcome
good idea - I might try that !
Posted: Mon Feb 04, 2008 3:16 pm
by peteb
Hi Alex,
Try pipe lagging, you know the grey flexy tube for covering your water pipes in the loft. Cut it to the right length and tape some stiff wire to it to represent the primaries. Its great for figuring routing and space considerations and best of all......it's cheap!!
Pete
Posted: Sat Feb 16, 2008 10:07 pm
by Schrodinger
Have you read the PPC article, something you may want to take into account is your gearbox ratios.
The example they used IIRC was a Jag engine with max power at 6,500 rpm wanted 400 mm primaries but change up a gear and the revs drop to 2,800 and you need 600mm to be within the power band, just a thought. Oh and how are you using the car as you may want the power band down the revs if you are predominantly on the road otherwise you may have to be on the limiter to get the best out of the engine, have a read.
Posted: Sat Feb 16, 2008 10:14 pm
by norma
Schrodinger wrote:Have you read the PPC article, something you may want to take into account is your gearbox ratios.
The example they used IIRC was a Jag engine with max power at 6,500 rpm wanted 400 mm primaries but change up a gear and the revs drop to 2,800 and you need 600mm to be within the power band, just a thought. Oh and how are you using the car as you may want the power band down the revs if you are predominantly on the road otherwise you may have to be on the limiter to get the best out of the engine, have a read.
Thanks Keith, good advice. I am a subscriber to PPC but for some reason Feb's issue hasn't turned up (I blame the robbing postie
)
So first issue I miss since the start of PPC is the one I really need to read - guess I'll have to go and buy it (bit annoying when I've already paid once
)