Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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I'm not having a go at you matey - but I can tell you from bitter experience that I spent a lot of time and money trying to tease as much power out of my 1.6 before I switched to TBs. With all those mods listed above (the head was thoroughly reworked to race spec) and with 264 degree cams, the best we could squeeze was 154bhp. They're great engines, but to increase power from 109 to over 160bhp is going to require something more than just the mods you listed
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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and i dont think that each engine differs so much fom each other.
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sebj
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Registered: 4th Sep 03
Location: Gavesend Kent
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Cheers for the info everyone . As mentioned above whats the reliability like on the 2 engines?
[Edited on 01-06-2004 by sebj]
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Well the X16 was designed with an increased reliabilty on mind. Both engines still suffer typica vauxhall problems like slipping belts and head gasket problems. However, the 1.6 corsa unit is fairly tough if looked after regardless of design. Just look after it, give it frequent services.
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Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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lol, dont metion throttle position sensor problems or EGR problems lol,
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Hammer Man
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Registered: 20th Mar 04
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Let me ask you guys something... These horsepower we are talking about... Wheel or Fly? I mean, they were measured as 160 or were converted from rolling road numbers?
Some dynos lie...
102 at the wheels... How would you consider this at the fly?
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Greasemonkey
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Registered: 17th Apr 02
Location: Drives a Tractor
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the figures i was talking about were at the fly dude
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Hammer Man
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Registered: 20th Mar 04
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quote:
Originally posted by Greasemonkey
the figures i was talking about were at the fly dude
Of course they are! I am just asking HOW THEY WERE MEASURED. In a rolling road (hat usually requires a conversion factor that determines the transmission losses) or in a bench dyno, where what you have is what it is...
Consider, as an exemple: 130 whp + 20% = 156 at the fly, or:
130 whp + 15% = 149,5 at the fly...
what are the conversion losses considered in every case? Are they really correct? Every car loses power in a different rate...
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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they take the wheel power then use a conversion factor usually about 20-25% i THINK cant remember correctly what they usually use
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Murray
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Registered: 22nd Feb 01
Location: Scotland
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i think the RR figures are out, when my x16xe had 150bhp the pistons couldn't take the power and melted, i had to get bigger forged pistons to cope with it. the c16xe that i've seen claim 160 said that it came in at 7500rpm, i doubt IF it did have this power that the engine stayed in one piece for very long!
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Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
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Is this a piss-take?  The standard pistons won't melt, even when using TBs, revving to 8K and producing 180bhp
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Hammer Man
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Registered: 20th Mar 04
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quote:
Originally posted by Andy
Is this a piss-take? The standard pistons won't melt, even when using TBs, revving to 8K and producing 180bhp
Melted pistons are generally related to poor A/F mixture... Excessive temperatures in the cylinders...
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sfxer
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Registered: 23rd Aug 00
Location: devon, england
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the c16xe when originaly built developed 150 bhp, they whacked on a restrictive inlet etc. and brought the power down to 109
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Murray
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Registered: 22nd Feb 01
Location: Scotland
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Tell that to my pistons then, this was about 2 hours after getting unichipped, the guy told me that the pistons were the weak point in the engine and had seen a couple of engines go pop.
And though it is true the engine was 150bhp when developed, they did a lot more than just 'whack' on a different inlet manifold.
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Hammer Man
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Registered: 20th Mar 04
User status: Offline
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quote:
Originally posted by Murray
Tell that to my pistons then, this was about 2 hours after getting unichipped, the guy told me that the pistons were the weak point in the engine and had seen a couple of engines go pop.
And though it is true the engine was 150bhp when developed, they did a lot more than just 'whack' on a different inlet manifold.
Well, I've heard of a couple of problems related to unichipped cars. Maybe it is a problem of calibration. They use a method to calibrate the engine (ignition advance and A/F) that relies on the settings that achieve the bigger power and torque when the car is tested on a dyno... Sometimes this is not the correct approach, since sometimes you need a richer mixture to ensure that the temperatures inside the cylinders are under control. Sometimes the perfect stoichmetric mixture is enough to fuck up with the pistons. You don't need necessarely a poor mixture to have problems.
They use a lambda meter and the dyno, but they seem not to like the pyrometers... I was just wondering if those guys that tuned your engine were using a pyrometer, maybe this could have been avoided... I am not affirming that, just imagining...
[Edited on 07-06-2004 by Hammer Man]
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