V7 SLR Posted March 18, 2005 Share Posted March 18, 2005 244bhp and 178ftlb. Power peaked higher a couple of times but that was inconsistencies with the RR. We managed a repeatable 244bhp (repeated it several times) and repeatable 178ftlb. DW thought my torque figure was close to the theoretical max per litre and beat a recent;y mapped 2 litre Vx (for max torque). Both Mylo and I had a very very successful day. 😬 😬 😬 Link to comment Share on other sites More sharing options...
philwaters Posted March 18, 2005 Share Posted March 18, 2005 Excellent Nige - well done! Worth all the hard work I take it Phil Waters Link to comment Share on other sites More sharing options...
F355GTS Posted March 18, 2005 Share Posted March 18, 2005 Nig " and beat a recent;y mapped 2 litre Vx (for max torque)." I take that as a challenge and will be ensuring Steve Greenald regains the VX crown on Tuesday with my car 😬 Seriously nice numbers mate, be interesting to see how reliable it is, I might be tempted back to the K Mark Link to comment Share on other sites More sharing options...
tom7 Posted March 18, 2005 Share Posted March 18, 2005 I've just got off the phone to Alex M who mentioned the power figure, but that level of torque is fantastic Looking forward to seeing the graphs. I guess I'd better start saving now Well done Link to comment Share on other sites More sharing options...
rgrigsby Posted March 18, 2005 Share Posted March 18, 2005 And I hope to beat both of you with my Duratec 😬 Having said that 178lbft out of a K is pretty impressive. Rob G www.SpeedySeven.com Edited by - rgrigsby on 18 Mar 2005 22:45:39 Link to comment Share on other sites More sharing options...
silver-7 Posted March 18, 2005 Share Posted March 18, 2005 He He He He 😬 😬 😬 😬 😬 Better start saving for bail money if the police catch you 🙆🏻 Alex Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 18, 2005 Share Posted March 18, 2005 Mightily impressive Nig! Look forward to seeing it in action! Link to comment Share on other sites More sharing options...
oilyhands Posted March 18, 2005 Share Posted March 18, 2005 Not bad from a free head port Nigel 😬 Oily Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted March 18, 2005 Share Posted March 18, 2005 Nice job Nige (and Dave A with the head job by all accounts then!!!) So what is Mr Smith gonna get out of his 1900 then? Clamshell Club Founder Member. Link to comment Share on other sites More sharing options...
Mark Durrant Posted March 19, 2005 Share Posted March 19, 2005 Very impressive results Mark D Su77on Se7ens Link to comment Share on other sites More sharing options...
V7 SLR Posted March 19, 2005 Author Share Posted March 19, 2005 Acceptance speech: I have a lot of people to thank for this not least Oily for the original head port, tons of advice about both the spec and components to use, and subsequent rebuild of the head. I have heard from other companies offering head work but I wouldn't go anywhere else. V7 wears its DVA stickers with pride. Maybe the stickers ought to be bigger? 😬 Pete, my friend who assembled the engine, has a level of care and attention to detail I couldn't match. I might have been able to build the engine myself, but watching Pete it is obvious that he puts a lot of thought and experience into the way he works, and I felt safe knowing that it couldn't have been assembled any better anywhere else. Pete's a great source of engineering knowledge and best practice, has an understanding of tools of the like rarely encountered... and a is great friend. Simon, without giving too much away (and knows to whom I am referring), helped me out with "insider" knowledge and advice which I find more reassuring than some of the speculative "advice" I have read. I know we go to Emerald for a chargeable service, but at the prices DW charges he can't be covering much more than his costs, and yet spending a day with him and benefitting from the advice and general conversation is worth many times what you pay there. It's almost worth uprooting and moving closer (boy, it's a long run). There are others whose kindness and generosity makes the ownership of such a car a pleasure. The community of Se7eners brought together by BlatChat, the Boardroom and the Se7ens list is unequalled. Right, speech over. I'm going for a blat. A fast one. 😬 😬 Link to comment Share on other sites More sharing options...
Chris__ Posted March 19, 2005 Share Posted March 19, 2005 Nice one Nig, pleased for you! Chris. Link to comment Share on other sites More sharing options...
V7 SLR Posted March 19, 2005 Author Share Posted March 19, 2005 Plot here Ignore the headline figure printed at the top. That was a glitch we kept seeing when we revved it past 8000. Although I will normally set my cut-out at 8000rpm, we were trying to see if there was any improvement above there. There wasn’t and we kept seeing that glitch. The repeatable figure was 244bhp @ ~7900rpm and 178lbft @ ~5686rpm. Edited by - V7 SLR on 19 Mar 2005 11:16:07 Link to comment Share on other sites More sharing options...
Jason Plato Posted March 19, 2005 Share Posted March 19, 2005 Great result Nige 😬 😬 😬 😬 😬 😬 C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
V7 SLR Posted March 19, 2005 Author Share Posted March 19, 2005 Thanks. I'm now very excited to see what results the other 1900's get. I think we have the following people to go: Alex Minchin Johnty Rik Roberts (Racingshoe) Dave McCulloch Mick Smith Andrew Dent (already partially mapped at 238bhp) Of these, I'm interested in the following: 1. To see what the VVC heads do compared to yours and my VHPD heads 2. Are any differences because of the different TB's Johnty has (which are on a manifold making their total length very impressive - they just fit under the bonnet) 3. Generally what inlets people have. Length, trumpet diameter, inside the bonnet etc. 4. Different inlet valve sizes one person has 5. If there's a trend between the torque curves of people with airboxes and those without. I think everyone will have a 4-2-1 collector too, but I'm not 100% sure about Johnty again, given that he has upgraded from a good 1600 over the past couple of years Link to comment Share on other sites More sharing options...
oilyhands Posted March 19, 2005 Share Posted March 19, 2005 I thought Andrew Dents was an 1800, perhaps I misunderstood, thanks for clearing that up. Oily Link to comment Share on other sites More sharing options...
Johnty Lyons Posted March 19, 2005 Share Posted March 19, 2005 Exhaust on SAZ is originall Caterham Competition 4 into 1 so will be a bit of a restriction on mine wil go Raceco next year. Link to comment Share on other sites More sharing options...
V7 SLR Posted March 19, 2005 Author Share Posted March 19, 2005 I'm not sure I agree that it will be a restriction JJ, more that you may find a bit of a hole around 4500rpm but may also find a tad more bhp at the top end. I'm very interested to see what you'll get when you eventually get it on the rollers. Link to comment Share on other sites More sharing options...
Lawrence_Z Posted March 19, 2005 Share Posted March 19, 2005 Absolutely Fantastic Nigel well done! Lawrence Link to comment Share on other sites More sharing options...
Racingshoe Posted March 19, 2005 Share Posted March 19, 2005 I'll be running a 4-1 for a while - have already spent well over budget without considering airboxes and exhausts. Still, there's always next month's pay packet 😬 Rik Robarts - bl**dy bright orange 1.4k SS here Link to comment Share on other sites More sharing options...
timbo Posted March 19, 2005 Share Posted March 19, 2005 Nice result Nige... look forward to seeing the back of your car dissappear from my nosecone on Haggis 😬 😬 Emerald Isle's 1st SV 148lbft @ 6091rpm/182bhp @ 6690rpm engineered for low revs Link to comment Share on other sites More sharing options...
Jason Plato Posted March 20, 2005 Share Posted March 20, 2005 I'm interested in what difference the choice of cams make, and if anyone will actually get the thing to make power past 8000 rpm . As a point of note , mine made more power / torque *with* the airbox - reflective pulse etc C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
simonbell Posted March 20, 2005 Share Posted March 20, 2005 Well done Nige..........looks like I`ve got a bit of catching up to do with the duratec 😬 Simon Bell - Caterham 7 Duratec R I`ve seen the future.....and it`s powered by duratec Check out the website here Link to comment Share on other sites More sharing options...
V7 SLR Posted March 20, 2005 Author Share Posted March 20, 2005 There's a lot I don't understand about power tuning, WRT pulse tuning inlets and exhausts, but it's a fun excercise. I played with my airbox on the previous incarnaion of V7's engine and found it was seriously hampering power near to the top, but I had completely different length inlets to you Dave and a completely different engine spec to that which we both now have. The only thing I'd like to experiement with now is lengthening the inlets but that'll have to wait until next year I think. I'm totally happy with the results for now and am going to enjoy baiting the up and coming Duratecs (although I'm looking forward to seeing them). 😬 DW reckoned the cams would start to make more power if I had revved past the peak I achieved at 7900. It would probably lead to an upturn in the power curve at 8300 or 8400 which was just too far for me. I didn't see much point in proving that given that I'm limited to 8000 on the road anyway. I don't mine stretching it to 8200 for the rolling road but no more. With Alex M's and your engine Dave, you have steel bottom ends so it would be an interestng experiment to see if the power curve tilts back upwards again. You're going to be hard to beat in this year's championship Dave. My money's on you, but no-one will take the bet. Link to comment Share on other sites More sharing options...
Jason Plato Posted March 20, 2005 Share Posted March 20, 2005 I wouldnt bet on me for the championship - this year there is soem very intersesting machinery in all classes . Its realy wide open . I'm tempted to try a wilder inlet cam and a larger bore exhaust . But I realy dont think its practical to have more than the 245 we currently have - traction is a serious problem at the moment . I wouldnt fancy our cars on the public road in the wet on one of your Highland tours !! C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
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