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| Little question about 998s https://www.ausmini.com/forums/viewtopic.php?f=2&t=77085 |
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| Author: | Speedwell Racer [ Wed Jun 06, 2012 8:21 pm ] |
| Post subject: | Little question about 998s |
Hey guys, Im just wondering what the record is for the most amount of ponnies produced by a 998 with a 5 port head. My mate has a 998 with a 5 port head and its had thousands spent on it including a dual stage down draft weber, bored 110 thou and massive head work. He is now planing on putting a turbo on it and expects 150hp. So just wondering if he could really get that sort of power from a 998. Cheers, Rhys. |
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| Author: | mini1990 [ Wed Jun 06, 2012 8:41 pm ] |
| Post subject: | |
With enough money I guess anything is possible. Check these guys out: they are trying to break the under 1000cc land speed record with a mini and have managed to ring 240hp out of their 998. Albeit with an extra cam and a turbo. http://www.ausmini.com/forums/viewtopic.php?t=76799 |
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| Author: | adamstuart [ Wed Jun 06, 2012 11:30 pm ] |
| Post subject: | |
150hp can be had from a turbo 998. Wil_H on turbo minis has a 13second 998. "Circa 155 BHP at 6900 rpm, 125 ftlb @ 5900 rpm" Twin turbo UK |
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| Author: | Irish Yobbo [ Thu Jun 07, 2012 11:03 am ] |
| Post subject: | |
It's important to remember what you want the power for though. The guys at Project 64 are doing an amazing job, but the engine will probably die after a thousand ks. I really like seeing people getting huge power out of the a series, but if you're going for practicality, you'd be better off going for an engine transplant. You'll get the power, along with the reliability and fuel economy. But as I said, modding the a series is fun. |
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| Author: | drmini in aust [ Thu Jun 07, 2012 1:58 pm ] |
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Just remember, a low compression 998 turbo when it's `off boost' is pretty gutless. Not real great in traffic. Hence why when building a turbo (for road use) many people use a 1098, not a 998. So pushbikes don't leave ya at the lights before you're spooled up. 
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| Author: | sgc [ Thu Jun 07, 2012 2:06 pm ] |
| Post subject: | |
The other thing is by extracting 150HP (at the wheels?) from a 998 you're building a grenade.. it's just a matter of time before it goes BANG! and showers the cyclists in oil and conrods... |
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| Author: | Kennomini [ Thu Jun 07, 2012 8:39 pm ] |
| Post subject: | |
if it's bored out it's not a 998
Personally If I was building a "998" I'd get a good head and make it flow really well, decent to excessive cam and forced induction. If you bore it out your building an 1100. |
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| Author: | sgc [ Thu Jun 07, 2012 8:58 pm ] |
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Kennomini wrote: If you bore it out your building an 1100.
No you're not! If you stroke it, it's an 1100
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| Author: | drmini in aust [ Thu Jun 07, 2012 9:56 pm ] |
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sgc wrote: Kennomini wrote: If you bore it out your building an 1100. No you're not! If you stroke it, it's an 1100 THEN you bore it out. 
Don't go silly with the overbores if turboing it, +.060" or +.080" is enough. Whether it's got a 1098 crank, or not. As for cams- don't go too big, or the valve overlap will send more of the boost down the zorst while both valves are open. I'd get one of GR's T cams, either the 83T or the 13T. |
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| Author: | Kennomini [ Fri Jun 08, 2012 7:06 pm ] |
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sgc wrote: Kennomini wrote: If you bore it out your building an 1100. No you're not! If you stroke it, it's an 1100 alright then, it's an 1108 (if my maths is correct  )
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| Author: | drmini in aust [ Fri Jun 08, 2012 8:03 pm ] |
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A 998 bored overbored to +.120" is 1095.5cc. I'd not be turboing it with cylinder walls this thin though.
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