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Old 11-07-2003, 10:24   #1 (permalink)
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EA - Need more power

I have a 87 (very first 12/87) EA 3.9L MPI (its been converted)

I am looking for ideas on how to extract more power out of my baby.

Larger Injectors?
Extractors?
Large Exhaust?
Air Intake?

I have heard all these terms before - has anybody got specifics?

I dont want a 10 sec street car, just a little more power. I have just resprayed the car, upgraded the interior and would like a tad more zoom zoom. My holden friends say sell it but I cant, I love the old girl too much.

PLEASE HELP HER.
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Old 11-08-2003, 07:00   #2 (permalink)
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Re: EA - Need more power

best place to start is intake and exhaust. a good k&n filter, xh snorkel, extractors (some people have had bad results with pacemakers. i have them on my car and they work a treat.), 2.5 inch exhaust. With extractors, remember that earlier model ohc sixes respond better to smaller diameter extractors (get them from jim mock motorsport. i've heard nuttin but good things about them). don't go bigger than 2.5inch exhaust pipe as it will destroy the backpressure. bigger is only better when it comes to turbos. get some good sparkplugs (bosch super 4 or splitfires), thicker leads and a better ignition coil (something like crane cams filreball lx-91). it will give you a bigger spark, burning the fuel more efficiently giving you more power and slightly lower fuel consupmtion. thermo fans are always a good idea. they'll keep your motor cooler and getting rid of a belt will boost the power a notch and get rid of that awful fan noise from the engine bay. chip it.
these are just some of the ways of getting more power. all of the mods mentioned are bolt on jobs.
hope this helps
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Old 11-08-2003, 07:29   #3 (permalink)
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Re: EA - Need more power

theres a couple of decent "genie" extractors sets here for sale somewhere..search through the last 60days threads
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Old 11-08-2003, 07:30   #4 (permalink)
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Re: EA - Need more power

There many different packages available now and they have been discussed at length on this very forum.

Do a search for JMM, Crow, or Wade and you'll see many differing opinions.

I personally have JMM stuff on my car and I think it is very good.
At the end of the day, you won't go to far wrong with any of them so long as it is installed properly and you have no weak links.

Rick.
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Old 11-08-2003, 11:52   #5 (permalink)
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Re: EA - Need more power

3 words for you

JIM MOCK MOTORSPORT
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Old 11-08-2003, 17:47   #6 (permalink)
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Re: EA - Need more power

If I were you I would do the following, in this order.


- Put in a 5 speed (if its auto)
- Extractors, exhaust (Pacemakers, JMM etc) & intake mods.
- Change diff gears (3.08 - 3.45 good for street)


This should get your car quicker then quite a few of those stock 5.0 commos, and a mid-low 15 sec 1/4 mile.

Once you start playing with cams, it will start costing you a bit to do it right, but there are good gains to be had.

Simon
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Old 11-08-2003, 21:15   #7 (permalink)
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Re: EA - Need more power

3.08 -3.45 with a ea 5 speed you have to be kidding

ea standard diff ratio is 2.92 with which you just pull 100k's out of second. I put a 3.08 ratio in when the motor was stock and it would barely pull 80k's in second (pulls 100 now due to higher revs)
3.45 Yeah if you get it to rev a lot higher other wise you'll be changing to 3rd at a whole 55kph
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Old 11-08-2003, 22:00   #8 (permalink)
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Re: EA - Need more power

Dude there must be something wrong with your box, mine runs a 3.08 and will go up to 100 in second. It's an EA serI box, too. Auscarnager just put a 3.45 in his and she bloody canes mate! 0-100 in about 5 or 6 seconds is good if you ask me.....

Nerrad, I'd be with Bass Crazy on this one, having done it myself - you wouldn't believe how much quicker the manual will make it. Then an exhaust and diff. Basically the motor is very strong and has a lot of potential. Ford then killed the power off with their grandpa driveline and restricted exhaust.

Even without the diff, my car ate VN/VP SS autos regularly after I put the manual box in. Never saw a manual v8 to race, unfortunately :(
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Old 11-08-2003, 23:01   #9 (permalink)
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Re: EA - Need more power

Mine hits 100kph in second (5spd) at 5800rpm no problemo.
3.5:1 diff.

Rick.
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Old 11-09-2003, 21:48   #10 (permalink)
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Re: EA - Need more power

With a 3.23 diff behind my EA T5 I get just over 95km/h @ 5000rpm.

With my current diff, im lucky to get 100 out of 3rd.. but boy does she haul ass!
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