S2000 Head Gasket
Joined: Oct 2000
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From: Lisbon
Originally posted by AusS2000:
The JDM head gasket is thinner and results in 11.7:1 compression (up from 11.1:1) and 250hp (when used with the required 100 octane fuel).
I'm not sure on the Spoon, but you'd expect it to be thinner and result in even higher compression, higher horses, and detonation unless run on methanol.
The JDM head gasket is thinner and results in 11.7:1 compression (up from 11.1:1) and 250hp (when used with the required 100 octane fuel).
I'm not sure on the Spoon, but you'd expect it to be thinner and result in even higher compression, higher horses, and detonation unless run on methanol.
BTW, Spoon does not recommend doing this mod by itself.
BTW2, compression ratio does not directly contribute to detonation, but only in the proportion that it contributes to final cylinder pressure at top dead centre. In the case of spoon, their cams [speculation] may have a larger overlap [/speculation] reducing cylinder pressure when compared to stock. Just another reason not to do the gasket without the rest.
Luis (still considering the JDM headgasket)
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Joined: Nov 2000
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From: Melbourne
Pardon my ignorance on this matter.... what effect does detonation have on the engine. From my limited understanding of the detonation concept - it occurs when the fuel/air mixture is not rich enough - ?yes/no .. which subsequently puts undue stress on the piston, valvegear therefore causing damage to them ?
This leads to my next question - assuming engine is modified with thinner head gasket ie increased compression ratio, and new valve springs, camshaft and pistons to cope with the higher compression ratio - if using a fuel grade which has low octane rating - the engine is just as likely to be damaged ? Can an octane boosting additive improve matters ?
This leads to my next question - assuming engine is modified with thinner head gasket ie increased compression ratio, and new valve springs, camshaft and pistons to cope with the higher compression ratio - if using a fuel grade which has low octane rating - the engine is just as likely to be damaged ? Can an octane boosting additive improve matters ?
Thread Starter
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Joined: Jan 2001
Posts: 23
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From: LA
After these ideas here
I may spend one to two years to collect whole spoon engine mod(piston valve spring, valve amd some other stuff)
then I will ask some specialist who is good at S2000 engine mod;balance(dose anyone konw someone like it?)
I think it may be the best way
or If I can sent my engine to japan andask spoon to do these for me(kind impossible unless I got MUCH more money)
I may spend one to two years to collect whole spoon engine mod(piston valve spring, valve amd some other stuff)
then I will ask some specialist who is good at S2000 engine mod;balance(dose anyone konw someone like it?)
I think it may be the best way
or If I can sent my engine to japan andask spoon to do these for me(kind impossible unless I got MUCH more money)
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Joined: Oct 2000
Posts: 10,134
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From: Baltimore
Originally posted by Vixe:
After these ideas here
I may spend one to two years to collect whole spoon engine mod(piston valve spring, valve amd some other stuff)
then I will ask some specialist who is good at S2000 engine mod;balance(dose anyone konw someone like it?)
I think it may be the best way
or If I can sent my engine to japan andask spoon to do these for me(kind impossible unless I got MUCH more money)
After these ideas here
I may spend one to two years to collect whole spoon engine mod(piston valve spring, valve amd some other stuff)
then I will ask some specialist who is good at S2000 engine mod;balance(dose anyone konw someone like it?)
I think it may be the best way
or If I can sent my engine to japan andask spoon to do these for me(kind impossible unless I got MUCH more money)
talk to me if you want spoon stuff at reasonable prices.
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Joined: Nov 2000
Posts: 3,615
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From: Melbourne!
Originally posted by mt2000:
Pardon my ignorance on this matter.... what effect does detonation have on the engine. From my limited understanding of the detonation concept - it occurs when the fuel/air mixture is not rich enough - ?yes/no .. which subsequently puts undue stress on the piston, valvegear therefore causing damage to them ?
Mark, detonation is caused by the air/fuel mixture being too hot prior to ignition. This can occur as a result of a too lean mixture, poor quality low octane fuel or incorrect ignition timing (spark too advanced). Most ECUs nowadays will automatically compensate for low octane fuel by retarding the spark and reducing power.
Can an octane boosting additive improve matters ?
Pardon my ignorance on this matter.... what effect does detonation have on the engine. From my limited understanding of the detonation concept - it occurs when the fuel/air mixture is not rich enough - ?yes/no .. which subsequently puts undue stress on the piston, valvegear therefore causing damage to them ?
Mark, detonation is caused by the air/fuel mixture being too hot prior to ignition. This can occur as a result of a too lean mixture, poor quality low octane fuel or incorrect ignition timing (spark too advanced). Most ECUs nowadays will automatically compensate for low octane fuel by retarding the spark and reducing power.
Can an octane boosting additive improve matters ?
One of things I am considering is a purchase of Avgas - it's Octane rating is 100/130 (the Octane rating will vary dependent on altitude and mixture strength). I use it at my local flying school to fill up the plane I fly (not my own - I rent) and I am sure I can organise to buy a can of it. It may provide interesting results but I'll try it first on my motorcycle before experimenting with the Stook.
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Joined: Nov 2000
Posts: 1,349
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From: Ocean City
Engine builders should be easy to find in california, I may start doing it for other people in a few years, I have another 2 to do for myself, actually 3 if you include a honda motorcycle engine, but that would make 7 total, but only two have been all out.
My suggestion would be to find a reputable builder, by asking around at a track or strip, then buy little things from them, so you get to know 'em. Youll get a feel for what they will/wont do before you ask, and youll learn alot too.
An upgrade-rebuild would be very expensive but I would do it just to have it. I will wait for my engine to have a little trouble though. (may be awhile)
My suggestion would be to find a reputable builder, by asking around at a track or strip, then buy little things from them, so you get to know 'em. Youll get a feel for what they will/wont do before you ask, and youll learn alot too.
An upgrade-rebuild would be very expensive but I would do it just to have it. I will wait for my engine to have a little trouble though. (may be awhile)
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