Re: INDY 360-1 SPARK ADVANCE ?
[Re: Performance Only]
#1504296
09/20/13 11:04 PM
09/20/13 11:04 PM
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Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
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There seems to be a pretty common theme to most of the replies here. The OP is asking about timing for a pump gas combo and almost everyone has replied with a racing engine likely running higher octane race gas. Higher octane (maybe too high) needs more timing due to the slower burn. The engine masters combo is a totally different animal so there's no need to compare that one.
machine shop owner and engine builder
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: W5DART66]
#1504298
09/20/13 11:39 PM
09/20/13 11:39 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Quote:
Jet for best MPH then start adding 1* see how it responds.
Don't get hung up on a number as that's all it is.
My deal was way rich for engine masters that's just how you have to run that deal.
But still it still wanted 38-40* on pump gas in a car and this was 10.75to1 flat top.
Guy on moparts has the engine in a D-50 truck and it runs well.
Maybe I should try more timing, I have only been running 35 degrees so far. THANKS Brett.....
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: Performance Only]
#1504299
09/20/13 11:43 PM
09/20/13 11:43 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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My W-2 engine on 87 octane likes 37*.. with the W-5s on it and 93 octane it liked 40*(on the dyno).. my W-9 likes 35* on E-85
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: Performance Only]
#1504301
09/21/13 10:02 PM
09/21/13 10:02 PM
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Joined: Apr 2010
Posts: 28 AUSTRALIA
CLEVO351
OP
member
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OP
member
Joined: Apr 2010
Posts: 28
AUSTRALIA
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Quote:
There seems to be a pretty common theme to most of the replies here. The OP is asking about timing for a pump gas combo and almost everyone has replied with a racing engine likely running higher octane race gas. Higher octane (maybe too high) needs more timing due to the slower burn. The engine masters combo is a totally different animal so there's no need to compare that one.
You are the only one that fully understands why i asked this question.
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: B G Racing]
#1504303
09/22/13 08:39 PM
09/22/13 08:39 PM
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Joined: Apr 2010
Posts: 28 AUSTRALIA
CLEVO351
OP
member
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OP
member
Joined: Apr 2010
Posts: 28
AUSTRALIA
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Quote:
At 11.7 CR arn't you close to needing more octane?I agree with Dan that if your going to run 93 you want to less timing.
We are going to run in the engine on pump gas and then do some testing with E85.
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: CLEVO351]
#1504304
09/23/13 11:51 AM
09/23/13 11:51 AM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Quote:
At 11.7 CR arn't you close to needing more octane?I agree with Dan that if your going to run 93 you want to less timing.
We are going to run in the engine on pump gas and then do some testing with E85.
Why even mess with pump gas,just go to E-85 since it's completely different.Going to pump gas is only going to lessen the performance.At your CR I would baseline it with 104/110 then change to E-85 knowing you need to make changes to flow 25%/30% more.With 11.7 CR I would treat it to better fuel and timing for max power. I admit I'am not well versed on E-85 and suggest you consult with guys like AJ Casini or others but at your CR level running pump gas and less timing will drop power.If you were in the 10.0 CR range you may do that but at around 12.0 CR you can possibly hurt something or have a substancial power loss.
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: CRIKEY]
#1504309
09/25/13 12:06 AM
09/25/13 12:06 AM
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Joined: Apr 2010
Posts: 28 AUSTRALIA
CLEVO351
OP
member
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OP
member
Joined: Apr 2010
Posts: 28
AUSTRALIA
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Quote:
35°-36° on 98 maybe, 1°-2° more on E85 depends whos E85 you use. I have never seen it need more then 36° on MS109 but at that static it may.
Was that on Shell 98 or Caltex,What capacity cid ? Did you Dyno and what power did it make? Thanks.
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Re: INDY 360-1 SPARK ADVANCE ?
[Re: CLEVO351]
#1504310
09/25/13 12:32 AM
09/25/13 12:32 AM
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Joined: Mar 2004
Posts: 702 OZ
CRIKEY
super gas
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super gas
Joined: Mar 2004
Posts: 702
OZ
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