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3f performance mods

Tech Talk for Cruiser owners.

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3f performance mods

Post by brentz »

k well i have decided after much thought ill just rebuild my 3f motor that i blew up :D
ive broken something in the bottom end yet to get it all apart but its already got a reco head etc and few other things so it should be sweet but i need a new bottom end rebuild just wondering what sort of performance mods i could do to the engine?
im gonna get extractors and new exhaust but just thinking what other people have done to them?
going 2 go talk with r.p.m. engines as i no him but just to get some ideas

thankz brentz
brentz
TUF-60 starting build soon
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Post by Thommo 73 »

3meters of chain and 47meters of rope :twisted: :lol:
1uzed and no home for it
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Post by RAY185 »

You're wasting your time trying to get decent power gains from a 3F without dumping lots of dollars doing efi and turbo mods as Matt has done.

I reckon if a conversion is off the cards then your best bet is to grab another 3F from a wrecker for probably under $500 complete and throw that in. They are a gutless motor but they do keep going if looked after.
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Post by hulsty »

If you MUST rebuild, shave the block/head for more compression, port match the maifolds, clean any casting dags etc in the ports fit new better shaped valves and a slightly better cam should give you a little more torque without breaking the bank, or just get another motor from the wreckers
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Post by mick&shon »

yeah buy mind its got recod head its done 209,000 and goes well, you get everything with it i went to a 5 litre
85 rangie 3.9i,disco5sp,4'' lift,80series rear, gq front, 33mtz
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Re: 3f performance mods

Post by jessie928 »

brentz wrote:k well i have decided after much thought ill just rebuild my 3f motor that i blew up :D
ive broken something in the bottom end yet to get it all apart but its already got a reco head etc and few other things so it should be sweet but i need a new bottom end rebuild just wondering what sort of performance mods i could do to the engine?
im gonna get extractors and new exhaust but just thinking what other people have done to them?
going 2 go talk with r.p.m. engines as i no him but just to get some ideas

thankz brentz
pull the 3f and chuck in a 2f :)

Jes
ATTACH BROKEN TOYOTA HERE--->
DUCATI <-----Worlds best warning label
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Location: melbourne australia

Post by pcman »

turbo it

http://forum.ih8mud.com/40-55-series-te ... roopy.html


100% stock motor apart from a reco head with lpg inserts o and the turbo
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Post by mick&shon »

i dont know about them being gutless when i picked my middi the old 3f (which i didnt know at the time) had a burnt out valve on no. 3 pots and blown head gasket between 3 & 4 it sounded like a lister engine but it still held 120ks no worries and came up the gap in 4th at 60k/ph and didnt get hot so thats not bad in my opinion thats not bad and they are rated at 110kw
85 rangie 3.9i,disco5sp,4'' lift,80series rear, gq front, 33mtz
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Location: Australia

Re: 3f performance mods

Post by hulsty »

jessie928 wrote:
brentz wrote:k well i have decided after much thought ill just rebuild my 3f motor that i blew up :D
ive broken something in the bottom end yet to get it all apart but its already got a reco head etc and few other things so it should be sweet but i need a new bottom end rebuild just wondering what sort of performance mods i could do to the engine?
im gonna get extractors and new exhaust but just thinking what other people have done to them?
going 2 go talk with r.p.m. engines as i no him but just to get some ideas

thankz brentz
pull the 3f and chuck in a 2f :)

Jes
and lose power and torque? why? unless you rebuild a 2F with more comp to give it more torque than a 3F
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Post by Ice »

3f head on 2f block ?
xxxx wrote:
:bad-words: :snipersmile:
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Re: 3f performance mods

Post by jessie928 »

hulsty wrote:
jessie928 wrote:
brentz wrote:k well i have decided after much thought ill just rebuild my 3f motor that i blew up :D
ive broken something in the bottom end yet to get it all apart but its already got a reco head etc and few other things so it should be sweet but i need a new bottom end rebuild just wondering what sort of performance mods i could do to the engine?
im gonna get extractors and new exhaust but just thinking what other people have done to them?
going 2 go talk with r.p.m. engines as i no him but just to get some ideas

thankz brentz
pull the 3f and chuck in a 2f :)

Jes
and lose power and torque? why? unless you rebuild a 2F with more comp to give it more torque than a 3F
ehem,

what you loose in torque and HP in the upper range for a 2f you GAIN in down below where you need it.
a 3f makes is HP and power high in the rev range, a 2f has bucketloads of power down low.

" there is no replacement for Displacement!

JEs
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Post by jessie928 »

ok to be specific, here are some figures

2F 4230 135@3600 210@1800
3F 3955 155@4000 219@3000

a 2f in a offroad truck will wipe the floor with a 3f anyday.

here is a handy site for specs

http://www.off-road.com/trucks4x4/artic ... ?id=264200

Jes
ATTACH BROKEN TOYOTA HERE--->
DUCATI <-----Worlds best warning label
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Post by Ice »

3f had no dramas pushing a 60 series along at ludicrous speed on stockton beach plenty of power to be had there
xxxx wrote:
:bad-words: :snipersmile:
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Post by brentz »

thanks guys im gonna see what i can do trust me not by choice of rebuilding this motor or sticking with a 3f its just that only other engine i would go would be a v8 and $1100 and loss of license on p plates aint appealing to me :D
brentz
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Post by pcman »

if you really wanna go v8 just throw in a 2nd hand junker 3f or 2f and make it last till you can legally fit the v8
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