Modified cylinder head

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CarGuru > Technology > Modified cylinder head - worth it? 20 April 2005 00:05:51

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Modified cylinder head - worth it?
Clive 15 April 2005 23:51:59
	On a 1.4 K-series, is it worthwhile modifying the cylinder head? I've got to take the head off because of the dreaded head gasket failure, so I just wondered if it is worth doing some porting and polishing? I'm not really intending to make many other mods, other than perhaps a K&N style induction kit and a free flow exhaust. So no high lift cams and big bore outs
		Add comment


Burgerman 15 April 2005 23:55:47 [ permanent link ]
	"Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message news:zXU7e.3603$DU6.2602@newsfe1-gui.ntli.net...> On a 1.4 K-series, is it worthwhile modifying the cylinder head? I've got > to take the head off because of the dreaded head gasket failure, so I just > wondered if it is worth doing some porting and polishing?> I'm not really intending to make many other mods, other than perhaps a K&N > style induction kit and a free flow exhaust. So no high lift cams and big > bore outs Port work alone will not achieve a lot. Bigger valves will IF the intake system and exhaust are not then the restrictive factor, and normally they are... Bumping up the compression a big dollop, (head skim) does always make a difference but you may need a cooler thermostat, and good quality fuel... -- www.diy-nitrous.fsnet.co.uk/ All about nitrous and how to DIY! www.dynamometer.fsnet.co.uk/ All about Dynamometers www.powerchair-review.fsnet.co.uk/ Powerchairs reviews and Robots www.tuning.wanadoo.co.uk/ All about engine tuning! (for dummies)
		Add comment


Bob Sherunckle 16 April 2005 12:35:06 [ permanent link ]
	Have a look at www.dvapower.com Dave andrews is The Man for K series tuning. Also have a look on www.blatchat.com - he posts as oilyhands. "Burgerman" <burgerman@ntlworld.com> wrote in message news:7%U7e.6185$WP4.1789@newsfe6-gui.ntli.net...> "Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message > news:zXU7e.3603$DU6.2602@newsfe1-gui.ntli.net...>> On a 1.4 K-series, is it worthwhile modifying the cylinder head? I've got >> to take the head off because of the dreaded head gasket failure, so I >> just wondered if it is worth doing some porting and polishing?>> I'm not really intending to make many other mods, other than perhaps a >> K&N style induction kit and a free flow exhaust. So no high lift cams and >> big bore outs > Port work alone will not achieve a lot.> Bigger valves will IF the intake system and exhaust are not then the > restrictive factor, and normally they are...> Bumping up the compression a big dollop, (head skim) does always make a > difference but you may need a cooler thermostat, and good quality fuel...> -- > www.diy-nitrous.fsnet.co.uk/ All about nitrous and how to DIY!> www.dynamometer.fsnet.co.uk/ All about Dynamometers> www.powerchair-review.fsnet.co.uk/ Powerchairs reviews and Robots> www.tuning.wanadoo.co.uk/ All about engine tuning! (for dummies)>
		Add comment


Brian 17 April 2005 05:08:35 [ permanent link ]
	"Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message news:zXU7e.3603$DU6.2602@newsfe1-gui.ntli.net...> On a 1.4 K-series, is it worthwhile modifying the cylinder head? I've got > to take the head off because of the dreaded head gasket failure, so I just > wondered if it is worth doing some porting and polishing?> I'm not really intending to make many other mods, other than perhaps a K&N > style induction kit and a free flow exhaust. So no high lift cams and big > bore outs Hello, On a 1.4 you wouldn't achieve any performance increase by adding a K&N type filter. The engine doesn't need more air than can be supplied by the paper element. Most normal car engines don't. Sucking in hot air from around the engine bay isn't a good idea as it will decrease performance. You will also need the smaller vent filters and in standing traffic the smell of fumes vented off might give you a headache! The exhaust will not do much either. People will make alsorts of mad claims about an extra 20BHP with the modifications you describe, but in reality it's closer to 2 if you're lucky. The car will sound louder with the induction noise and also exhaust note, so you might think it's faster. I would save your money and not fall for the marketing and advertising of some products - especially not those aimed at boy racers! Best advice is to leave the engine as it is, fit a decent exhaust but not a big horrible noisy thing, keep it well serviced and you can't go wrong. If you do fit all the bits then do a comparison for yourself with before and after figures. You will see they stay the same. I had a metro years ago and it was a great car, a really good engine but the thing that let it down badly was the gas suspension and radius arms. It was fairly quick for what it was (1.3HLS).
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Depresion 17 April 2005 08:19:52 [ permanent link ]
	"Brian" <8t0y@kcl.com> wrote in message news:nGi8e.7727$DU6.2502@newsfe1-gui.ntli.net...> "Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message > news:zXU7e.3603$DU6.2602@newsfe1-gui.ntli.net...>> On a 1.4 K-series, is it worthwhile modifying the cylinder head? I've got to >> take the head off because of the dreaded head gasket failure, so I just >> wondered if it is worth doing some porting and polishing?>> I'm not really intending to make many other mods, other than perhaps a K&N >> style induction kit and a free flow exhaust. So no high lift cams and big >> bore outs > Hello,> On a 1.4 you wouldn't achieve any performance increase by adding a K&N type > filter. The engine doesn't need more air than can be supplied by the paper > element. Most normal car engines don't. Sucking in hot air from around the > engine bay isn't a good idea as it will decrease performance. You will also > need the smaller vent filters and in standing traffic the smell of fumes > vented off might give you a headache!> The exhaust will not do much either. People will make alsorts of mad claims > about an extra 20BHP with the modifications you describe, but in reality it's > closer to 2 if you're lucky. I'd expect more than 2bhp for what's going to cost him a grand if not more.
		Add comment


Andy Connolly 19 April 2005 11:36:37 [ permanent link ]
	So if it's 2 bhp max, explain how mine was putting out 130bhp+ after filter, headwork, plugs & leads, etc etc... Andy PS, the 1.3 you had in your metro wouldn't have been a K.
		Add comment


Burgerman 19 April 2005 13:39:41 [ permanent link ]
	-- www.diy-nitrous.fsnet.co.uk/ All about nitrous and how to DIY! www.dynamometer.fsnet.co.uk/ All about Dynamometers www.powerchair-review.fsnet.co.uk/ Powerchairs reviews and Robots www.tuning.wanadoo.co.uk/ All about engine tuning! (for dummies) "Andy Connolly" <andy_connolly@blueyonder.co.uk> wrote in message news:9y29e.101303$C12.56892@fe1.news.blueyonder.co.uk...> So if it's 2 bhp max, explain how mine was putting out 130bhp+ after > filter, headwork, plugs & leads, etc etc...> Andy> PS, the 1.3 you had in your metro wouldn't have been a K.>
		Add comment


Pete M 19 April 2005 13:40:47 [ permanent link ]
	In news:9y29e.101303$C12.56892@fe1.news.blueyonder.co.uk, Andy Connolly <andy_connolly@blueyonder.co.uk> decided to enlighten our sheltered souls with a rant as follows> So if it's 2 bhp max, explain how mine was putting out 130bhp+ after> filter, headwork, plugs & leads, etc etc...> Andy> PS, the 1.3 you had in your metro wouldn't have been a K. B O G G L E -- Pete M Mercedes 260E, Porsche 911 Carrera 3.2 Ford Capri (ressurection started) "Never moon a werewolf" COSOC #5 Scouse Git extraordinaire. Liverpool, Great Britain
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Conor 19 April 2005 14:45:29 [ permanent link ]
	In article <9y29e.101303$C12.56892@fe1.news.blueyonder.co.uk>, Andy Connolly says...> So if it's 2 bhp max, explain how mine was putting out 130bhp+ after filter, > headwork, plugs & leads, etc etc...> Depends which rolling road you took it to. I know of one where the guy who owned it used to alter the calibration because he got sick of all the boy racer twats bitching because their bolt on bodges did next to nothing. Used to be funny as hell to watch especially as a "130BHP" XR3i went out and was immediately thrashed by a real 130BHP X-Flowed MK2 Essie competition car. -- Conor "Of all the things I've lost, I miss my mind the most." O.Osbourne.
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LordyUK 20 April 2005 00:05:51 [ permanent link ]
	So if it's 2 bhp max, explain how mine was putting out 130bhp+ > after filter, headwork, plugs & leads, etc etc... Because it was putting out 128bhp before ? -- Lordy.UK
		Add comment

CarGuru > Technology > Modified cylinder head - worth it? 20 April 2005 00:05:51

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Modified cylinder head - worth it?

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