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Location:
Perth
Registered:
August 2004
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Re: 1jz wish list
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Tue, 14 September 2004 13:16
 
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You have actually mentioned two different things here batch fire and sequential injection is different from the sequential ignition on the microtech you were mentioning.
1JZs can be run in sequential ignition or wasted spark mode...
In terms of sequential injection thats a different story. The factory computer uses batch fire so do most production engines even the 1uz and the rb26dett uses a form of batch injection.. This means that the injectors fire the fuel all at the same time... sometimes they run semi sequential where you have each three drivers alternating.
Sequential injection is when each injector is individually controlled and the fuel only gets injected when the inlet valve is open.
In performance terms because the injectors are not putting fuel directly into the cylinder there has been very little or no difference in performance..
Where sequential injection is good is when you want really good fuel economy as you dont tend to have little wells of fuel being put onto the back sides of the valves (although in performance terms this helps cool the valves).
Unfortunately with sequential injection because you can only inject fuel when the inlet valve(s) are open you have a much shorter time period to inject the required fuel to get the desires air/fual ratio so you need MUCH bigger injectors...
So in short sequential ignition is worthwhile but not paramount.. as for sequential injection... Dont bother just get it to alternate each three banks of injectors.
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| | Subject | Poster | Date |
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1jz wish list
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tyottsoarer | Mon, 13 September 2004 14:34 |
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Re: 1jz wish list
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stark | Mon, 13 September 2004 14:52 |
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Re: 1jz wish list
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tyottsoarer | Mon, 13 September 2004 15:54 |
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Re: 1jz wish list
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alwaysRA23 | Mon, 13 September 2004 20:50 |
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Re: 1jz wish list
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Chris Davey | Mon, 13 September 2004 21:25 |
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Re: 1jz wish list
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CrUZsida | Tue, 14 September 2004 04:57 |
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Re: 1jz wish list
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Jag7799 | Tue, 14 September 2004 05:36 |
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Re: 1jz wish list
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Jag7799 | Tue, 14 September 2004 00:23 |
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Re: 1jz wish list
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Chris Davey | Tue, 14 September 2004 00:55 |
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Re: 1jz wish list
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tyottsoarer | Tue, 14 September 2004 01:19 |
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Re: 1jz wish list
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Celia-Sue | Tue, 14 September 2004 03:23 |
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Re: 1jz wish list
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Chris Davey | Tue, 14 September 2004 08:27 |
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Re: 1jz wish list
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stark | Tue, 14 September 2004 13:16 |
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Re: 1jz wish list
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Norbie | Tue, 14 September 2004 13:25 |
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Re: 1jz wish list
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wastegate | Tue, 14 September 2004 23:07 |
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Re: 1jz wish list
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draven | Tue, 14 September 2004 23:23 |
