markjonesx 1 Posted November 1, 2012 Report Share Posted November 1, 2012 http://www.thelotusforums.com/forums/blog/15/entry-136-engine-rebuilt-on-dyno/ Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
jonwat 435 Posted November 2, 2012 Report Share Posted November 2, 2012 Engine looks nice, what did you paint the cam covers with? Quote Cheers, John W http://jonwatkins.co.uk Link to post Share on other sites
markjonesx 1 Posted November 2, 2012 Author Report Share Posted November 2, 2012 (edited) Here you go; http://www.frost.co.uk/automotive-paint/vht-paints/vht-red-wrinkle-finish-310ml.html Edited November 2, 2012 by markjonesx Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
Wilf 22 Posted November 2, 2012 Report Share Posted November 2, 2012 What spec are the engine innards? Quote Link to post Share on other sites
markjonesx 1 Posted November 2, 2012 Author Report Share Posted November 2, 2012 It's all completely standard apart from new pistons as my old ones were out of tolerance. Nothing special or trick, just set and built correctly. Crank/rods/piston/flywheel were all balanced professionally, runs as smooth as silk. As soon as I have the dyno' print outs I'll post these also. Will probably show another 5-8BHP with the 4-1 manifold. Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
molemot 521 Posted November 2, 2012 Report Share Posted November 2, 2012 Very pretty! When I did my cam covers, I wiped the paint off the machined ribbing and lettering; seems to make them stand out more? Quote Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein Link to post Share on other sites
markjonesx 1 Posted November 2, 2012 Author Report Share Posted November 2, 2012 Data read outs; Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
[email protected] 0 Posted November 16, 2012 Report Share Posted November 16, 2012 Nice job Mark. Looking at the max hp rpm, is that with two 107 cams? A well known head guy on our west coast said on the dyno he picked up 30hp using a lotus elite airbox, the one with the single 3 1/2" inlet. I'm building a 907/912hc hybrid, and with big overbore, should end up at about 2290cc's, and looking to build 225hp on std valves. Here is my topend and paint job on the cam covers, self ported the 912hc head. Brian Quote Link to post Share on other sites
jonwat 435 Posted November 16, 2012 Report Share Posted November 16, 2012 I'm building a 907/912hc hybrid, and with big overbore, should end up at about 2290cc's, and looking to build 225hp on std valves. Looks nice, did you gas flow the head yourself? Quote Cheers, John W http://jonwatkins.co.uk Link to post Share on other sites
markjonesx 1 Posted November 16, 2012 Author Report Share Posted November 16, 2012 Looks great Brian. Can't believe the 30hp story.......... Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
[email protected] 0 Posted November 16, 2012 Report Share Posted November 16, 2012 (edited) I did not 'flow' it John, but did send it to Richard Reymen at West Coast Cylinder Heads, he has it currently. He is installing new bronze guides and seals, new stainless valves, cutting the seats, full comp valve job, skimming, and shimming the cams. He has ported dozens of lotus heads. He was quite pleased in what he saw, and said absolutely nothing else needed to be done, that I had worked all the areas that needed attention, and was quite impressed with what I had done with the bowl porting. He is the most respected lotus porting specialist this side of the pond. They don't do very many lotus heads these days as compaired to years ago, now it is all chevy cnc 5 axis porting of LS7 heads and such. I shared with him I was quite happy with his analysis, considering that was my first 'head job' at age 62. A little head never hurts! Richard is the one that had the 30hp experience on the dyno with the elite air box (no filter) verses just the velocity stacks. All he could attribute it to was 'acoustics', just like a tuned header. He was working on a ported and cammed 2.2, was trying some jetting changes, and was around 205-210 hp, and the jetting was not making much difference. Said he went back to the beginning jetting, put the elite box on, and pulled 240hp! I'm going to see if I can plumb in the elite box, not sure enough room up front under the engine cover. I would be glad to list some of my design and build ideas I am trying if you like, but I feel pretty bad that I have intruded on your thread Mark. Brian Edited November 16, 2012 by bharper Quote Link to post Share on other sites
[email protected] 0 Posted November 21, 2012 Report Share Posted November 21, 2012 Mark, Is that indeed 107 cams? I take it you went high compression pistons? Looking at the dyno run, I would want the 4-2-1 header that run was made with. Once you get a full breakin on that engine, the numbers should increase even a little more. I have no idea why you would want to go a 4-1, you will lose a lot of the bottom end torque. The only reason you might pick up some additional top end is if the primary tubes are too short, which a well known British available 4-1 has. Most 4-1's do not measure that much better than the stock lotus setup. If you are running 107's, that would not be a good match up. I am in the queue for a custom 4-2-1 header on this side of the pond from lotus esprit parts dot com. I drool over the lotusbits stainless setup, but just can not afford it once you factor in shipping. Your esprit build looks absolutely fantastic!!! Can see the love, time, and skill that has been put into it. Brian Quote Link to post Share on other sites
markjonesx 1 Posted December 18, 2012 Author Report Share Posted December 18, 2012 I think the cam are std 104, I'll have to check. The pistons were a slightly higher compression, these are the same pistons SJ use from Omega. Quote Esprit S1, 238G, Blog Online Photo's This car was most definately hand built, NOTHING FITS! Link to post Share on other sites
nic996 20 Posted December 20, 2012 Report Share Posted December 20, 2012 Cam covers look great!! Going to redo mine now with the Lotus script and rib painted. Quote The reason people use a crucifix against vampires is that vampires are allergic to bullshit - Richard Pryor -1971 Link to post Share on other sites
[email protected] 0 Posted December 21, 2012 Report Share Posted December 21, 2012 If those are the original cams, I would expect both are 107's. If you look right behind the cam pulleys, a 104 will have 4's, where a 107 will have 7's around the circumference of the cam. The hp peek sure appears to be that of 107 cams.... Brian Quote Link to post Share on other sites
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