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displaying posts 1 to 17 of 17
| Author | Subject: oversizing inlet valves? |
 Teshboi1988
Regular  Location: Dartford Registered: 29 Jan 2012 Posts: 131 Status: Offline |
Post #1
just curious really not undergoing job. but looking on that pug1off site. and was just wondering wot is really involved and wot benefits ud get, does it have to be mapped etc..obviously u gota have them seated but anything else? ________________________________________ phase 3 Hatchback V reg 5Door GTi6 |
 Posted 8th Apr 2012 at 12:13
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midlife
Seasoned Pro  Location: Colne, Lancashire Registered: 13 Mar 2006 Posts: 7,544 Status: Offline |
Post #2
Don't waste your money, unless you're already at 240+bhp NA and you're looking for a bit extra.Spend your cash on suspension & brakes   ________________________________________ Get used to seeing the yellow one !!! Team 330™ Team "no front end or engine" Team "LIMITED EDITION" I live for the 306 sticker  Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engine 203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine |
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Posted 8th Apr 2012 at 12:27
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Teshboi1988
Regular Location: Dartford Registered: 29 Jan 2012 Posts: 131 Status: Offline |
Post #3
i have cars looking mean. so just really researching ________________________________________ phase 3 Hatchback V reg 5Door GTi6 |
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Posted 8th Apr 2012 at 12:30
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b11 bob
Banned! Location: birmingham Registered: 19 Dec 2010 Posts: 265 Status: Offline |
Post #4
Teshboi1988 wrote: just curious really not undergoing job. but looking on that pug1off site. and was just wondering wot is really involved and wot benefits ud get, does it have to be mapped etc..obviously u gota have them seated but anything else? You can get oversized inlet valves made out of a the same grade metal has the exshaust valves.I have had them fitted to my head due to my original valves falling apart and smashing up my pistons.You do need them seated and they are bigger than standard so the benifits would be more air more power and remap.Although ive not had mine remaped due to being on Carbs but it will cost you around £200 for the valves ,reseating of the valves £200 ,and remap so when you all done you might get change out of £600 and maybe a couple of bhp and lbs of torque which is not really cost effective.However due to my valves breaking i have done the above to have peace of mind due to my driving style being more extreme than average. ________________________________________ 205 GTI6 235 bhp at 7400 rpm |
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Posted 8th Apr 2012 at 12:33
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Teshboi1988
Regular Location: Dartford Registered: 29 Jan 2012 Posts: 131 Status: Offline |
Post #5
fair anuf... so a engine remap is not needed. so woodnt lower bhp or nothing but will be good wen i do get it remapped eventually.________________________________________ phase 3 Hatchback V reg 5Door GTi6 |
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Posted 8th Apr 2012 at 12:40
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welshpug!
Capt Pedantic
 Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #6
I know most of sandy brown's race engines use standard valve diameters, afaik that includes a 225 bhp+ TU5J4, and a few 280 odd bhp XU10's and EW10's.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 8th Apr 2012 at 12:48
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b11 bob
Banned! Location: birmingham Registered: 19 Dec 2010 Posts: 265 Status: Offline |
Post #7
welshpug! wrote: I know most of sandy brown's race engines use standard valve diameters, afaik that includes a 225 bhp+ TU5J4, and a few 280 odd bhp XU10's and EW10's. The valves i got were used and were made for Longman for his race /modfied engines etc and are oversized valve diameters and i think are made out of steel, standard inlet valves are alloy and are joined these i got are one piece. ________________________________________ 205 GTI6 235 bhp at 7400 rpm |
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Posted 8th Apr 2012 at 12:56
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welshpug!
Capt Pedantic
Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #8
standard valves are steel, dont think i've ever heard of alloy valves.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 8th Apr 2012 at 13:02
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #9
Standard inlet valves are CrSi steelStandard exhaust valves are bimetallic with chromium plated CrSi steel stems and Austenitic CrMnNiNb-steel heads ________________________________________ Rich |
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Posted 8th Apr 2012 at 13:23
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welshpug!
Capt Pedantic
Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #10
interesting to note, I guess that's mainly why most proper engine builds use quite expensive single piece valves as the seat pressure and impacts must be immense at high revs.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 8th Apr 2012 at 13:33
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b11 bob
Banned! Location: birmingham Registered: 19 Dec 2010 Posts: 265 Status: Offline |
Post #11
Rich E wrote: Standard inlet valves are CrSi steel Standard exhaust valves are bimetallic with chromium plated CrSi steel stems and Austenitic CrMnNiNb-steel heads These ones i got are different to the standard inlet valves and are one piece i guess they must be some other material i got them of a chap called Paul Ivy who said these are better grade than standard inlet valves. ________________________________________ 205 GTI6 235 bhp at 7400 rpm |
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Posted 8th Apr 2012 at 13:42
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b11 bob
Banned! Location: birmingham Registered: 19 Dec 2010 Posts: 265 Status: Offline |
Post #12
welshpug! wrote: interesting to note, I guess that's mainly why most proper engine builds use quite expensive single piece valves as the seat pressure and impacts must be immense at high revs. Could be but ive spoke to a lot of people before i got these and only a few ever recalled valves breaking so i must have been very unlucky when my valves broke off . ________________________________________ 205 GTI6 235 bhp at 7400 rpm |
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Posted 8th Apr 2012 at 13:46
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welshpug!
Capt Pedantic
Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #13
what pistons do you run?________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 8th Apr 2012 at 13:48
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b11 bob
Banned! Location: birmingham Registered: 19 Dec 2010 Posts: 265 Status: Offline |
Post #14
welshpug! wrote: what pistons do you run? Standard gti6 pistons ________________________________________ 205 GTI6 235 bhp at 7400 rpm |
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Posted 9th Apr 2012 at 00:07
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welshpug!
Capt Pedantic
Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #15
palm+face...________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 9th Apr 2012 at 01:05
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midlife
Seasoned Pro Location: Colne, Lancashire Registered: 13 Mar 2006 Posts: 7,544 Status: Offline |
Post #16
Well I guess it's better than "round ones"  Think he would get a better performance increase fitting a magic tree  ________________________________________ Get used to seeing the yellow one !!!Team 330™ Team "no front end or engine" Team "LIMITED EDITION" I live for the 306 sticker Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engine 203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine |
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Posted 9th Apr 2012 at 01:09
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dav1
Regular Location: leek/staffs Registered: 20 Jun 2011 Posts: 312 Status: Offline |
Post #17
Std pistons? You got 235bhp Wat cams do you run matey?________________________________________ 230bhp 205 gti6 |
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Posted 10th Apr 2012 at 07:40
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