Craigieboy Posted August 19 Share Posted August 19 1 hour ago, Flying Carrot Steve said: Oh yeah, I've also replaced the large and heavy fire extinguisher with a Fire Safety Stick, that's saved me 3.4kgs. It's all adding up @Ian Kinder (Bagpuss) - Joint Peak District AO That's nothing. I've replaced bone with Titanium plates and screws, though that's maybe a bit hard-core for some. 2 Quote Link to comment Share on other sites More sharing options...
Paul Baker Posted August 19 Share Posted August 19 I've just been reading this thread with much interest as I finally got round to doing the full geometry set up on my car today, which revealed the weight, something I had always wondered. Went to see our local expert just round the corner from Castle Combe where I'll be testing out the new set up tomorrow. Really pleased with the new set up, just on the drive home it felt vastly improved. So it weighed in at 650kg, which is pretty much where I was expecting, bearing in mind I've got everything - full cage, carpets, heater and all the creature comforts etc. I worked out that I'm at 285bhp/tonne which makes me smile. Will probably look at weight saving ideas in the future but I need to start with the driver first to make it worthwhile 😂 4 Quote Link to comment Share on other sites More sharing options...
GaryH Posted August 19 Share Posted August 19 1 hour ago, Stuart Davis AO - Devon Cornwall & Somerset said: Any idea how a 1.7 crossflow compares with that? Hi Stuart Other than a lot heavier no idea. What I can tell you is that as well as the sigma car we had a family 1700cc crossflow westfield, the handling was chalk and cheese. The sigma light and nippy the weighty crossflow didn't like like turning in! Gary 1 Quote Link to comment Share on other sites More sharing options...
Stuart Davis AO - Devon Cornwall & Somerset Posted August 19 Author Share Posted August 19 37 minutes ago, GaryH said: Hi Stuart Other than a lot heavier no idea. What I can tell you is that as well as the sigma car we had a family 1700cc crossflow westfield, the handling was chalk and cheese. The sigma light and nippy the weighty crossflow didn't like like turning in! Gary Interesting. Mine turns in just fine 😊. Will do some googling and see what the weight difference is. EDIT Easier said than done! Seems very hard to find a like for like comparison eg with/without ancillaries, flywheel, clutch etc etc. I’ll keep trying…. Quote Link to comment Share on other sites More sharing options...
Kingster Posted August 19 Share Posted August 19 2 hours ago, Stuart Davis AO - Devon Cornwall & Somerset said: Any idea how a 1.7 crossflow compares with that? Nope - I just googled the earlier info purely out of interest 😁 Quote Link to comment Share on other sites More sharing options...
Stuart Davis AO - Devon Cornwall & Somerset Posted August 19 Author Share Posted August 19 Found this, which assuming the 90kg weight I found for a Sigma is fully dressed makes the Crossflow 20kg heavier….. roughly. Quote Link to comment Share on other sites More sharing options...
Burgerbob Posted August 19 Share Posted August 19 http://westfield-world.com/weight_reduction_calc.html This link may be of interest too 2 Quote Link to comment Share on other sites More sharing options...
GaryH Posted August 19 Share Posted August 19 1 hour ago, Stuart Davis AO - Devon Cornwall & Somerset said: Interesting. Mine turns in just fine 😊. Will do some googling and see what the weight difference is. EDIT Easier said than done! Seems very hard to find a like for like comparison eg with/without ancillaries, flywheel, clutch etc etc. I’ll keep trying…. I suppose my turning in opinion is relative to us as a family comparison. The crossflow car was set up to the Westfield-world.com geometry data, and drove well. However, 115bhp for the heavier crossflow compared with 142bhp (by Troy at NMS) for the sigma and lighter weight, just made our sigma much more responsive than our crossflow. Interestingly the Westfield sigma weight compares well with sigma Caterham weights given in the chart earlier in this thread. Gary 1 Quote Link to comment Share on other sites More sharing options...
Flying Carrot Steve Posted August 19 Share Posted August 19 34 minutes ago, Burgerbob said: http://westfield-world.com/weight_reduction_calc.html This link may be of interest too I've looked at that before and got the impression it was a bit ancient. Certainly hasn't got my wheels, or seats, or flywheel etc. Some of it is still relevant and useful though 👍 Quote Link to comment Share on other sites More sharing options...
Stuart Davis AO - Devon Cornwall & Somerset Posted August 19 Author Share Posted August 19 2 hours ago, GaryH said: I suppose my turning in opinion is relative to us as a family comparison. The crossflow car was set up to the Westfield-world.com geometry data, and drove well. However, 115bhp for the heavier crossflow compared with 142bhp (by Troy at NMS) for the sigma and lighter weight, just made our sigma much more responsive than our crossflow. Interestingly the Westfield sigma weight compares well with sigma Caterham weights given in the chart earlier in this thread. Gary Too true. I’ve only got my car as a reference; to me it feels pretty agile and responsive but obviously I’ve not driven a Sigma engined car. Mine is nominally 135bhp though not been dyno’d so not sure what it is actually putting out, but it is fairly minimalist and pretty light which helps it feel fairly perky. Quote Link to comment Share on other sites More sharing options...
Mat Jackson 1975 Posted August 21 Share Posted August 21 On 18/08/2024 at 23:07, Kingster said: this was mine - pretty happy with that considering it was a 2.0 zetec with a full cage. What was the spec of this that got it down to that weight? I’m trying to reduce the weight in mine as much as possible Quote Link to comment Share on other sites More sharing options...
Captain Colonial Posted August 21 Share Posted August 21 29 minutes ago, Mat Jackson 1975 said: What was the spec of this that got it down to that weight? I’m trying to reduce the weight in mine as much as possible That's the weight with him sitting in it. He's a wee racing snake. Quote Link to comment Share on other sites More sharing options...
Kingster Posted August 21 Share Posted August 21 2 hours ago, Captain Colonial said: That's the weight with him sitting in it. He's a wee racing snake. 🤣🤣 I wish! 2 hours ago, Mat Jackson 1975 said: What was the spec of this that got it down to that weight? I’m trying to reduce the weight in mine as much as possible In terms of weight saving, the big items were the alloy bellhousing, 13” cxr rims, lithium ion battery, jk seats (not as light as carbon though!), carbon bits (dash, aeroscreen, cycle wings), alloy uprights and hubs, wilwood calipers, digital dash (replaced 5-6 gauges and lost a big chunk of wiring) and no screen/wiper/heater gubbins. 1 1 Quote Link to comment Share on other sites More sharing options...
Craigieboy Posted August 21 Share Posted August 21 14 minutes ago, Kingster said: 🤣🤣 I wish! In terms of weight saving, the big items were the alloy bellhousing, 13” cxr rims, lithium ion battery, jk seats (not as light as carbon though!), carbon bits (dash, aeroscreen, cycle wings), alloy uprights and hubs, wilwood calipers, digital dash (replaced 5-6 gauges and lost a big chunk of wiring) and no screen/wiper/heater gubbins. Is this what your car looks like? 5 Quote Link to comment Share on other sites More sharing options...
Kingster Posted August 21 Share Posted August 21 6 hours ago, Craigieboy said: Is this what your car looks like? Gawd no! You seen those hyowdge wadgy chavtastic wheels 😳 Quote Link to comment Share on other sites More sharing options...
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