oddballrovers Posted February 26, 2015 Share Posted February 26, 2015 Hello Friends. As per title and topic tag, is it possible to obtain 250bhp or there about on a diy basis and what is neccesary to do? I am my self thinking of a mildly ported head, a cam total balance and MS or something with same tuning possibilities. Ole Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 26, 2015 Share Posted February 26, 2015 All that should get you in the ballpark. Not sure if the inlet manifold will support much more than 250 though. Quote Link to comment Share on other sites More sharing options...
oddballrovers Posted February 26, 2015 Author Share Posted February 26, 2015 That sound good, but then there is the cam, whatis the opinion re that? re the inlet manifold I have read that 265 is possible but then you are on the limit so the 250 should be okay Ole Quote Link to comment Share on other sites More sharing options...
Soren Frimodt Posted February 26, 2015 Share Posted February 26, 2015 How about supercharging the living daylight out of it? IRC it has around 200bhp in stock form, so an extra 65bhp shouldn't be hard to gain with a blower? And it would most likely be cheaper too Quote Link to comment Share on other sites More sharing options...
oddballrovers Posted February 26, 2015 Author Share Posted February 26, 2015 Not an option, as it would mean multiplying the capasity with 1,7 and then the weight goes up..............and to me turbo or supercharging is cheating Ole Quote Link to comment Share on other sites More sharing options...
Soren Frimodt Posted February 26, 2015 Share Posted February 26, 2015 haha okay then Quote Link to comment Share on other sites More sharing options...
greenstream Posted February 26, 2015 Share Posted February 26, 2015 Chicken ! Throw away the bananas and get hold of a Eaton M112 and some MS, dont know if your old lt95 can handle it ? Quote Link to comment Share on other sites More sharing options...
stuck Posted February 26, 2015 Share Posted February 26, 2015 I have a supercharged L322 (different engine I know) & I'm very, very seriously considering fitting a supercharger to the 4.6 in my 110. The power that is on tap with the supercharger is seriously addictive. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 26, 2015 Share Posted February 26, 2015 Kent H200 cam should do you well. Quote Link to comment Share on other sites More sharing options...
Team Idris Posted February 27, 2015 Share Posted February 27, 2015 And some ARP studs to hold it all together. They do the job and look great. Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 27, 2015 Share Posted February 27, 2015 Any of the "stump puller" cams are a great fit for a Landy. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 27, 2015 Share Posted February 27, 2015 IIRC you couldn't get stump puller types without the dizzy gear drive, so no good for the Thor. compression ratio increase, some 4.0 are only 8:1, aim for 10ish. Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 27, 2015 Share Posted February 27, 2015 http://v8tuner.co.uk/product.php?id=913 I think that's the one a friend of mine fitted. Works great. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 27, 2015 Share Posted February 27, 2015 IIRC you couldn't get stump puller types without the dizzy gear drive, so no good for the Thor. Pretty sure Kent and Piper will sell any cam in long or short nose flavour. Piper definitely will. Cheapest way to (claimed) 250hp is replace with a 4.6. Ultimately the Rover V8 is not a high-revving race engine so high BHP numbers are (relatively) harder to achieve, although plenty of race engines were built from them back in the day, even up to F1 I believe. Does depend what you really want, 250hp is just a number, you can make an engine hit a HP number easily enough but the thing could be utterly useless & undriveable & your wallet will be bleeding. Quote Link to comment Share on other sites More sharing options...
need4speed Posted February 27, 2015 Share Posted February 27, 2015 Flog the 4.0 and build yourself a nice 4.6. Add MS and you have an easy 250 and loads of torque Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 27, 2015 Share Posted February 27, 2015 I believe that's correct f2f, I get the impression that 'stump puller' is actually a model name from real steel thought, hence my comment. I have an Kent H200 in my own 4.0 Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 27, 2015 Share Posted February 27, 2015 Oh, I didn't see the 4.0 in the title. Yes, step 1, get a 4.6. And you may be right Bowie, I thought it was just a common term for high torque at low rpm cams. Quote Link to comment Share on other sites More sharing options...
oddballrovers Posted February 27, 2015 Author Share Posted February 27, 2015 Hi folks. Thnx for all the input, 4,0 is chosen as this give me a minimum weight off 1825kg dry, 4,6 would give 1937,5kg, the 4,0 is a faster reving engine as far as I can figure a 4,4 would also be quite well, being a square engine, but again it would mean a higher weight, what I am aiming for is a fast reving engine within the Rover range of engines. The 250bhp is not sort of a target, more like a guideline at the end off the day it is the area under the powercurve ( if you get me right) that counts the more area, the stronger an engine, the faster acceleration, all the little gains one can have each time you accelerate from one speed up to another will reduce the elapse time, top speed is not so much needed in the kind off event I am planing to take part in, that is also why I have chosen the thor engine, it also being the choice in some off the Bowlers where 265bhp is claimed, but on another budget than I am on :-) I would also like to stay below 6000 rpm as above that you move into unsafe areas where more money has to be shed out if you want to keep the reliability. The cam Elbekko links to, the ARP studs and bolts, Idris, and the compression issue Bowie mentioned is all to be invesitgated in. Keep the info and thought coming :-) Ole Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 27, 2015 Share Posted February 27, 2015 erm, why is a 4.6 another 112.5Kg? They are the same block, and only barely weight 180Kg when dressed (lighty). Quote Link to comment Share on other sites More sharing options...
oddballrovers Posted February 27, 2015 Author Share Posted February 27, 2015 erm, why is a 4.6 another 112.5Kg? They are the same block, and only barely weight 180Kg when dressed (lighty). It is the total weight off the car, rules says so in certain countrys, when you are racing :-) nothing to do with the engine itself. The cars are subject to the following scale of minimum weights in relation to cylinder capacity and in accordance with FIA Article 282-3.2: Cylinder capacity in cm3 Weight in kg 4x4 4x2 up to 1400 1150 750 over 1400 and up to 1600 1150 860 over 1600 and up to 2000 1350 980 over 2000 and up to 2250 1500 1010 over 2250 and up to 2500 1600 1040 over 2500 and up to 2750 1637.5 1070 over 2750 and up to 3000 1675 1100 over 3000 and up to 3250 1712.5 1130 over 3250 and up to 3500 1750 1160 over 3500 and up to 3750 1787.5 1190 over 3750 and up to 4000 1825 1220 over 4000 and up to 4250 1862.5 1250 over 4250 and up to 4500 1900 1280 over 4500 and up to 4750 1937.5 1310 over 4750 and up to 5000 1975 1340 over 5000 and up to 5250 2012.5 1370 over 5250 2050 1400 Ole Quote Link to comment Share on other sites More sharing options...
garrycol Posted February 28, 2015 Share Posted February 28, 2015 Use the 4.0 to make a 4.6 and no one will know the difference Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 28, 2015 Share Posted February 28, 2015 Aha, thank you very much Quote Link to comment Share on other sites More sharing options...
need4speed Posted February 28, 2015 Share Posted February 28, 2015 Just to clear something up. Stump Puller is not a generic name for a high torque cam. It is a specific cam model name from RS. I have one in mine.. Quote Link to comment Share on other sites More sharing options...
garrycol Posted February 28, 2015 Share Posted February 28, 2015 Use the 4.0 to make a 4.6 and no one will know the difference And if you use the 4.0 pistons you get even higher compression ratio - zoom zoom Quote Link to comment Share on other sites More sharing options...
need4speed Posted February 28, 2015 Share Posted February 28, 2015 At the time of building my engine the 4.0 pistons were hard to come by so just got the heads skimmed to compensate.. Quote Link to comment Share on other sites More sharing options...
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