Elise K20 Race car Build - New Zealand - Page 2 - LotusTalk - The Lotus Cars Community
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post #21 of 32 (permalink) Old 01-27-2018, 11:21 AM Thread Starter
cph
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Or maybe its just two small mufflers to keep the sound under 95dba ... :-)

2-11 : BOE Built Engine / Rev 400 SC / Quaife Sequential / Dry Sump / Fastworks Tune SOLD
https://www.lotustalk.com/forums/f16...roject-339234/

ELISE : K20 / TVS 1320 / EP sequential / Dry Sumped / Motec M1

https://www.lotustalk.com/forums/f16...ealand-439105/

JUNO SSE K20 NA
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post #22 of 32 (permalink) Old 01-27-2018, 11:32 AM Thread Starter
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Nice. I like everything, but the wheels caught my attention. Very symmetrical.

San
Yes it does .. possibly just the angle of the pics
Tyre & Rims are
200/580 16 -Dunlop Soft Slicks - 7" Rim
235/610 17 - Dunlop Soft Slicks - 8" Rim

I dont really subscribe to larger / wider tyres for these cars . I have had a lot of input / help from Simon Scuffham in the UK [ some of you may recall him on this site in previous years with insightful knowledge , mixed with his upfront personality ] He has always used this tyre sizing on all his race builds , some to over 500hp and has yet to have traction issues.

Looking possibly to add 25mm spacers to increase track F & R , but this will be part of the ongoing development.

2-11 : BOE Built Engine / Rev 400 SC / Quaife Sequential / Dry Sump / Fastworks Tune SOLD
https://www.lotustalk.com/forums/f16...roject-339234/

ELISE : K20 / TVS 1320 / EP sequential / Dry Sumped / Motec M1

https://www.lotustalk.com/forums/f16...ealand-439105/

JUNO SSE K20 NA
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post #23 of 32 (permalink) Old 01-27-2018, 12:08 PM
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I was just referring to the wheel/spoke symmetry, not implying the wheels were the same size.

I liked the symmetry of my Team Dynamics wheels, but couldn't resist the lighter weight of the RAC Monolites.

San

#8 Metric Allen Key, Plastic Carpet Buttons, Never Been on Fire
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post #24 of 32 (permalink) Old 01-27-2018, 12:25 PM Thread Starter
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Yes I can see what you mean... got the wrong end of that one !

Wheels are Braid Fullrace A ... not the lightest but a well respected race rim and reasonable on price ... similar spec I guess to your 949 wheels in the USA .

Actually I see they are in the USA now: https://braidusa.com/

2-11 : BOE Built Engine / Rev 400 SC / Quaife Sequential / Dry Sump / Fastworks Tune SOLD
https://www.lotustalk.com/forums/f16...roject-339234/

ELISE : K20 / TVS 1320 / EP sequential / Dry Sumped / Motec M1

https://www.lotustalk.com/forums/f16...ealand-439105/

JUNO SSE K20 NA
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post #25 of 32 (permalink) Old 01-27-2018, 12:32 PM
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Yeah, I actually looked them up yesterday after seeing your pictures.

There seems to be differing opinions on the tire sizes, but I think there seems to be some truth in diminishing performance gains on wider tires, given the light weight and lack of adequate tire heat buildup.

San

#8 Metric Allen Key, Plastic Carpet Buttons, Never Been on Fire
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post #26 of 32 (permalink) Old 01-27-2018, 08:23 PM
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Its my version of a "PowerBomb" which is a four-stroke header that incorporates a PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases).
That is very interesting! Kind of like expansion chambers on a 2-cycle motorcycle engine...and like they used to do on 4-cycle motorcycle engines in the 70s - the "megaphone" exhausts. Someone did a significant amount of development work in that style of exhaust system. I can easily believe localized 10% power gains on the power curve. Do those expansion chambers (as you call "PowerBombs") give you a "ring-a-ding-ding" type sound quality like a 2-cycle engine? Got a sound clip you could share? Very cool that motorcycle technology is being used/explored.

Whoever said that island life is great was never committed to Alcatraz...
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post #27 of 32 (permalink) Old 01-28-2018, 11:39 AM Thread Starter
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Ummm .. sorry ..my sad sense of humour ... see post 21

2-11 : BOE Built Engine / Rev 400 SC / Quaife Sequential / Dry Sump / Fastworks Tune SOLD
https://www.lotustalk.com/forums/f16...roject-339234/

ELISE : K20 / TVS 1320 / EP sequential / Dry Sumped / Motec M1

https://www.lotustalk.com/forums/f16...ealand-439105/

JUNO SSE K20 NA
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post #28 of 32 (permalink) Old 09-03-2019, 04:56 PM
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Hi CPH, just wondering how’s your gear box going?
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post #29 of 32 (permalink) Old 09-03-2019, 05:02 PM
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Oh man so glad to see this post, I am about the embark on approximately the same build! Reading...

2007 Exige S with almost every track mod...
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post #30 of 32 (permalink) Old 09-03-2019, 05:12 PM
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Oh man so glad to see this post, I am about the embark on approximately the same build! Reading...
I can't believe you haven't seen his posts before. He has an awesome build, actually two I believe. Great guy.

San

#8 Metric Allen Key, Plastic Carpet Buttons, Never Been on Fire
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post #31 of 32 (permalink) Old 09-03-2019, 05:18 PM
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Good to know, I am desperate for some advise on the gear box.
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post #32 of 32 (permalink) Old 09-03-2019, 06:03 PM
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Do you own one (the trans) or you are about to buy one? I have a deal in place to buy a 0 mile used unit and convert to K24

@cph Did you use the EP mounts? How was the solid mounting? Why didn't you use their flywheel? Is there a way to mount the dry sump system so it doesn't NEED priming? What axles did you use?

2007 Exige S with almost every track mod...
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