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Has anyone got deecnt power out of a 3.9L 

 

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 Post subject: Has anyone got deecnt power out of a 3.9L
Posted: Sat Feb 10, 2007 4:30 pm 
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Hey guys Iam new here on these forums .Nice to see something different.Anyway I was wondering if anyone apart from myself has modified an EA 3.9L and has decent power.Last dyno run was 140kw (dynos vary) and it ran a 15.1 with a crow 825, and all the normal mods.I have since fitted a Surecam and it ran slower.ALot of people are telling me its because its a 3.9 and head and bottom end will never make power drop a 4 litre in it.Just thought I'd see what you guys have experienced.Thanks
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Posted: Sat Feb 10, 2007 4:57 pm 
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have a talk to Southy, i believe he has one of the fastese EA 3.9's around, iirc it runs 14.8's.

 

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Posted: Sat Feb 10, 2007 5:05 pm 
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The saloon cars were all 3.9's and would put most 4.0's on here to shame even with all the class restrictions.

 

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 Post subject: Re: Has anyone got deecnt power out of a 3.9L
Posted: Sat Feb 10, 2007 5:12 pm 
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lukey39 wrote:
Hey guys Iam new here on these forums .Nice to see something different.Anyway I was wondering if anyone apart from myself has modified an EA 3.9L and has decent power.Last dyno run was 140kw (dynos vary) and it ran a 15.1 with a crow 825, and all the normal mods.I have since fitted a Surecam and it ran slower.ALot of people are telling me its because its a 3.9 and head and bottom end will never make power drop a 4 litre in it.Just thought I'd see what you guys have experienced.Thanks


Is it auto or manual???
What diff ratio is in it???

 

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Posted: Sat Feb 10, 2007 5:17 pm 
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alfy wrote:
have a talk to Southy, i believe he has one of the fastese EA 3.9's around, iirc it runs 14.8's.
yeh, he ran a 14.6 pretty bloody good for s**t on wheels. (kiddin)

 

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Posted: Sat Feb 10, 2007 8:16 pm 
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manual, from memory he runs a 2.77? diff.

fair effort for a boxcar ;)

 

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Posted: Sat Feb 10, 2007 8:18 pm 
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Souths EA is the only Boxcar 6 I respect lol.

 

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Posted: Sat Feb 10, 2007 8:20 pm 
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rushed wrote:
manual, from memory he runs a 2.77? diff.

fair effort for a boxcar ;)


I n the EA's, the early autos ran a 2.77 diff, and the manuals had 2.92 diff.
I think when the 4sp autos came out, the had 3.08's or 3.27's

 

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Posted: Sat Feb 10, 2007 8:34 pm 
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yeh, southys is 2.x, I remember on drag day mentioning how well it would go after he got the dif chanegd!

 

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 Post subject: Re: Has anyone got deecnt power out of a 3.9L
Posted: Sat Feb 10, 2007 8:49 pm 
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lukey39 wrote:
Hey guys Iam new here on these forums .Nice to see something different.Anyway I was wondering if anyone apart from myself has modified an EA 3.9L and has decent power.Last dyno run was 140kw (dynos vary) and it ran a 15.1 with a crow 825, and all the normal mods.I have since fitted a Surecam and it ran slower.ALot of people are telling me its because its a 3.9 and head and bottom end will never make power drop a 4 litre in it.Just thought I'd see what you guys have experienced.Thanks


140rwkw and you ran a 15?!
Is it auto? That's one generous dyno!
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Posted: Sat Feb 10, 2007 9:03 pm 
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there have been a couple of 10sec turbo i6 ea falcons on fullboost.com.au, a red one and a white one. :)

red one belongs to jim mock motorsport, and the white one is on page 4 in the videos section.
or here if your not a member: http://www.youtube.com/watch?v=v0vxwFsCheQ


3.9 is not much different to the 4.0, imo

 

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Posted: Sun Feb 11, 2007 11:03 am 
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Its a manual with 3.45:1 diff gears.The dyno should have read more like 120 kw,after placing the figures in a horse power calculator.Thanks for the response.
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Posted: Sun Feb 11, 2007 11:23 am 
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14.8 was with 2.92 single spinner

then i threw in a lsd 2.92 and was running 14.6s

Still would do alot better with a decent diff, maybe a 3.9
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Posted: Sun Feb 11, 2007 11:26 am 
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ohhh and sorry didnt list mods...

mods are 2.5" exhaust, extractors and a mild cam
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Posted: Tue Feb 13, 2007 7:54 pm 
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Gday
I used ta have a 3.9 centerfire in me eb i think the best mod i did was convert to 4ltre multipoint. Wasnt the easiest task but i had the bits lying around. But yeh good luck wiith it

 

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