hey guys i wont to get the most power out of my 998 motor as possible without having to sell my kidney or something to pay for it what modifications do you think i should do eg what type of head, should i put a 1100 crank in it.
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| Author: | badassmini [ Wed Jun 28, 2006 10:08 pm ] |
| Post subject: | modify engine |
hey guys i wont to get the most power out of my 998 motor as possible without having to sell my kidney or something to pay for it what modifications do you think i should do eg what type of head, should i put a 1100 crank in it.
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| Author: | Marvin [ Wed Jun 28, 2006 10:37 pm ] |
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There is a thread in here called "Power Tuning the 998" http://www.ausmini.com/forums/viewtopic.php?t=18602 |
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| Author: | Spaceboy [ Wed Jun 28, 2006 11:02 pm ] |
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have some porting done, bigger carb(s), extractors, exhaust, new camshaft. |
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| Author: | badassmini [ Thu Jun 29, 2006 12:04 pm ] |
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can you put a different head on it from a different size motor |
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| Author: | Spaceboy [ Thu Jun 29, 2006 12:48 pm ] |
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yes, but the cooper heads are rare, expensive and some require modification. wheras smallbore heads cost nothing and are readily available. a 12g202 is a good dirt cheap head. mmm head. |
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| Author: | kazjim [ Thu Jun 29, 2006 12:49 pm ] |
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"get the most power out of my 998 motor as possible" Well, start modifying ... I'm getting around 85HP@Wheels with my little 998 .... Long-Stroke crank, 0.060 over, 1275 head, 1.5:1 rockers, large valves, ported and chanmber shaped, RE-13T Cam, Pulsar dizzy, Turbo, HIF-44 carb, PWR Intercooler, lightened flywheel and clutch backing plate... Lots of other stuff too .... good for about 7000RPM and at the moment about 12PSI (Engine is 3 weeks old!!) going up to 14/16 in the next week or so .... J |
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| Author: | Spaceboy [ Thu Jun 29, 2006 12:59 pm ] |
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with the utmost respect to your now 1100 turbo - the way i see it modifying smallbores is about getting the most out of what u have without spending enough to buy a 1275.
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| Author: | czerial [ Thu Jun 29, 2006 1:41 pm ] |
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I reckon different horses for different courses. Some people like to take the easy route and buying and modifiyng a 1275 is there way to go quick and that is fine. Others like a bit of a challenge, Jim im sure knows that he could of bought a 1275 maybe for the money he spent. but has much satisfaction from getting great results from a small bore.. similarly (I am not spending a great deal on my motor) i cant wait to get more power and torque from my 998 than what i get with my 1293.. it just is a bit of fun to do things a different way.. in saying that, if there is a 1275 available for the right money then of course i would buy it and do something with that!! lol 
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| Author: | kazjim [ Thu Jun 29, 2006 1:57 pm ] |
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Chris, I've actually SOLD 2 1275's to help fund this beast ! (and it still owes me a LOT of $$$) BUT everything done to this engine can easily be moved over to a big-block... and make a little more power ... Persoanlly, my motivation was to build a realtivly simple engine that could mix it up with the big boys, but still be able to tootle to the train or shops ... yea, its a little grumpy now with the RE-13T and the rockers, but its still very, very drivable... it has the huge torque of an 1100, plus the shove in the back of a massivly modified 1275 (1st Ausmini Dyno day, the only 1275 to take me out was a race-prepped 1400cc Clubbie - yellow one...) and even then by only 0.8 of a HP .... I was pretty damn happy that day... since then I have added the larger turbo, the large head and the intercooler as well as had some major revisions in the tuning and timing... Lets just say, I've got a small-block that should be able to handle itself around most big-blocks .... and its alot of fun ! J |
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| Author: | czerial [ Thu Jun 29, 2006 3:36 pm ] |
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didnt doubt the cost at all mate!!! 
Just trying to say the reaasonin behind my going for modifying a small block was for the satisfaction of doin things different to the norm 
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| Author: | kazjim [ Thu Jun 29, 2006 6:09 pm ] |
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I'm with you all the way .... I'm a Small-Block Biggot at heart .... Go the Underdog... J |
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| Author: | Mister White Keys [ Thu Jun 29, 2006 6:59 pm ] |
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I'm currently building a 1030cc for my van and the main reason for the small bore is money. Not just in terms of the motor, but there's something a little unnerving to me about a stove hot 1275 with drum brakes all round. Call me crazy but I like to be able to reign in the horses. Until I can afford a set of discs for the beast I'm gonna have to keep playing with small bore. I also agree that there is a whole lot of satisfaction to be had from getting the most power out of the smallest capacity. But then, I like a challenge. |
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| Author: | drmini in aust [ Thu Jun 29, 2006 7:08 pm ] |
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kazjim wrote: yea, its a little grumpy now with the RE-13T and the rockers, but its still very, very drivable... it has the huge torque of an 1100, plus the shove in the back of a massivly modified 1275
J So, James, how are my ToyoMini (Corolla) rockers going then... and what clearance are you running. 
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| Author: | feralsprint [ Thu Jun 29, 2006 8:04 pm ] |
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kazjim wrote: I'm with you all the way ....
I'm a Small-Block Biggot at heart .... Go the Underdog... J using the formula for working out the capacity of engines using hairdryers your engine is rated at 1870cc far from being a small bore
Jon |
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| Author: | badassmini [ Thu Jun 29, 2006 8:57 pm ] |
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if i put a 1100 crank and pistons in it, it's already been bored 60thou will i be able to still get a compresion ratio of 8:1 cause i would like to supercharge it as well. with the 1275 head if i can get one at reasonable price will i be able to bolt it streight on or will i have to drill another head bolt hole and modify it. |
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