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max power timing 

 

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 Post subject: max power timing
Posted: Mon Feb 16, 2009 6:15 pm 
Getting Side Ways
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ok how many degrees timing should i have for max power at full boost wot?aprox

 

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 Post subject: Re: max power timing
Posted: Mon Feb 16, 2009 8:43 pm 
Getting Side Ways
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Man it's not that simple.

 

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 Post subject: Re: max power timing
Posted: Mon Feb 16, 2009 9:00 pm 
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What he ^^^ said, there is more to it than that, as every setup is different. You havent stated any suggested engine work, or even what you would define as full boost.

 

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 Post subject: Re: max power timing
Posted: Mon Feb 16, 2009 9:01 pm 
Getting Side Ways
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one... meelll-ion... degrees lol

 

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 Post subject: Re: max power timing
Posted: Mon Feb 16, 2009 9:05 pm 
Getting Side Ways
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stock internals 12psi,dont worry though i'll just try it as i go working my way up,was just trying to save time

 

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97 el xr6,5 speed short shifter,sequential scoop,no arial,freshly resprayed,low on 17's,3 inch zorst,stainless hi flo cat,snort stage 3 stainless manifold,garrett t04e,front mount cooler,wolf 3d ecu,seimens 760cc injectors,walbro fuel pump

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 Post subject: Re: max power timing
Posted: Tue Feb 17, 2009 12:05 am 
Oompa Loompa
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Location: Perth
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Start at 15 and depending on compression and fueling up to 20 degrees advance.
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 Post subject: Re: max power timing
Posted: Tue Feb 17, 2009 7:42 am 
Getting Side Ways
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thanks

 

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97 el xr6,5 speed short shifter,sequential scoop,no arial,freshly resprayed,low on 17's,3 inch zorst,stainless hi flo cat,snort stage 3 stainless manifold,garrett t04e,front mount cooler,wolf 3d ecu,seimens 760cc injectors,walbro fuel pump

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 Post subject: Re: max power timing
Posted: Fri Feb 20, 2009 11:22 am 
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As boost / power goes up.. Generally advance is retarded..
When timing gets down to about 10* to keep detonation away its about as far as you can go..
Or manifolds heat up too much with unburnt fuel..
Its a bit like asking.. How long is a piece of string ??

Some engines once going through max torque.. When timing is retarded .. Over this
rpm range often more advance can be added while turbo / head efficiency runs out..
This gives a little more power in upper rpm ..
This all depends on compression, detonation threshold, exhaust flow, turbo efficiancy etc..
The reason why 700 h.p turbo's are fitted to 4.0 engines that make half that..

My low compression turbo V8 at 18 Lb is 24* and up to 50* to spool turbo at low rpm..

 

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