4G63 DOHC

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NXTIME
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Post by NXTIME »

I actually had a good look at a 6G74 DOHC engine minus sump and manifolds today. Will easily fit into the Starion engine bay.

RB30/26 is a brilliant combination with plenty of torque. There is an S14A 200SX that has a similar engine and runs 10.5 on only 17psi pump fuel tune.
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Post by mrb1 »

NXTIME wrote:I actually had a good look at a 6G74 DOHC engine minus sump and manifolds today. Will easily fit into the Starion engine bay.

RB30/26 is a brilliant combination with plenty of torque. There is an S14A 200SX that has a similar engine and runs 10.5 on only 17psi pump fuel tune.
There is a guy in Blacktown with a VG30 SOHC turbo is his Starion. Looks real nice plenty of room.
The VG30 DOHC engine is a lot wider on the cylinder heads so it would be tighter.
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Post by toysrus »

What is this 6 cylinder DOHC engine swaps I'm hearing about here.......we're not taking shortcuts are we...on getting the Starion up to speed hey ? :D

How much extra weight is introduced with these Engines on average ?

And from what I have read on the 2.6ltr affecting the handling, I wouldn't be suprised if these had a bigger effect then that of the lowly 2.6 even though they can rev higher......

If your chasing straight-line speed glory, lock that open-diff up, weld the rear struts into being fixed, strip the car as much possible, change the camshaft, run n2o and boost till the cows come home :P

The only thing going for these swaps is the Engineering certificates in the East are a lot less then here :cry:
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NXTIME
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Post by NXTIME »

mrb1 wrote:
NXTIME wrote:I actually had a good look at a 6G74 DOHC engine minus sump and manifolds today. Will easily fit into the Starion engine bay.

RB30/26 is a brilliant combination with plenty of torque. There is an S14A 200SX that has a similar engine and runs 10.5 on only 17psi pump fuel tune.
There is a guy in Blacktown with a VG30 SOHC turbo is his Starion. Looks real nice plenty of room.
The VG30 DOHC engine is a lot wider on the cylinder heads so it would be tighter.
Yeah, I am sure that he used to work with my bro-in-law. Its would be tighter, but can be done easy enough. But I would prefer to keep it in the family and go with a 6G series engine ;)
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Post by quest »

these heavy cars will be better off with the torque of a 3L if you're after a beast. Le$$ money for the same results.
vg30Et sohc would be my choice. You can grab drivetrains or donor cars dirt cheap in the u.s. z31 guys pull the non turbo vg30E straight from sport utes, boost their street cars, making 450+ ft-lbs of tire-shredding tq to the wheels from *mild* setups.
Worldwide racing boosted a STOCK 3.3L version ute motor (vg33e) to 700+ hp before it finally let go! Amazingly rugged, smooth runners. By far, the 'best bang for the buck' performer.
The vg30dett dohc is bigger, complicated and too much fuss - any benefits... not worth the extra $$$ imo. The sohc is far easier fit, cheaper to run, mod, work on, etc... A vg30dett in the lighter s13 did plaster me in the seat really hard tho lol.

The 4g63 dohc has proven to propell 3100+ pound cars to 11sec ETs with recipees u can duplicate. The 4g64 dohc can comfortably land u in the 10s. A better way to go if a 'real' swap is not practical. Good stuff

Don't count out the 2.6 g54b. 400 ft-lbs tq is 400 ft-lbs... and deadly
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Post by NXTIME »

Further to that, the 3S guys in the US have turbo'd the NA 6G72 engines with great success - they can handle quite a bit in stock NA and TT form.
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Post by quest »

I was looking at a sohc 24v mitsu v6 in a 2000 sport ute the other day. It was quite compact and ran very smooth. Got curious about the turbo performance potential, so I hit the net. Didn't really see anything 'that' exciting, even from the 3S or 3rd gen guys tho. Seems like a good swap candidate.

Oddly enough, I was looking towards a possible replacement for the 4cyl 2L turbo mitsu motor in my corolla. Naturally I'd like to 'keep it in the family', but toyota had no "practical" 2L turbo 4cyl, so I went mitsu..... and what do I stumble across recently ? A 2000 toyota pickup v6/5spd with, first a TRD supercharge kit, then went custom turbo. At only 13psi on pump gas, put down 440+ ft-lbs tq to the wheels! Thats stock internals, ebay t4 and managed via stock ecu + safc piggyback + hacked oe mafs (bigger pipe,same sensor) and 440cc. Available, cheap, simple but impressive... so thats the route I'm chasing now. Thats 3.4L

Have a friend with a 2jzgte in a ae86. Don't like the way that "long" motor 'fits' that car... A t66 @20+psi goes like its fkn possessed tho
Too much power for me. The abovementioned 440tq v6 will do nicely
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Post by airbats801 »

toysrus wrote:What is this 6 cylinder DOHC engine swaps I'm hearing about here.......we're not taking shortcuts are we...on getting the Starion up to speed hey ? :D

How much extra weight is introduced with these Engines on average ?

And from what I have read on the 2.6ltr affecting the handling, I wouldn't be suprised if these had a bigger effect then that of the lowly 2.6 even though they can rev higher......

If your chasing straight-line speed glory, lock that open-diff up, weld the rear struts into being fixed, strip the car as much possible, change the camshaft, run n2o and boost till the cows come home :P

The only thing going for these swaps is the Engineering certificates in the East are a lot less then here :cry:
I cant imagine the g54b waying barely any more than the 4g63, The g54b is pretty damn light, and not much longer, also has about half the aluminum on top as a dohc 4g63 ;)

The weight fromt he 2.6 comes from the widebdy cars not the engine. I think an sr20 would be a pretty stupid swap consideirng you guys always have a 4g63, and comparing apples to oranges, I think 6 bolt 4g63 dohc>sr20

Heck throw in the Between the 4g63 and 4g64 you have a ton of options 1.8, 2.0, 2.1, 2.3, 2.4, and 2.7l.

You guys keep saying these cars are heavy, but whatare you comparing them to, econo boxes or sports cars? Lets see, mk3 supra 3600lbs, fc35- 3k? 3000gt and 300zx tt z31 are both damn near 4000lbs, r34 skyline is damn near 3500lbs. mk4 supra weighs about 3400lbs. Suddenly that 3100lbs widebody, or 2900lbs flatty doesnt seem so bad ;)

As for engine swaps, I think just about anything is good though.I personally love the looks and the sounds of toytas inline 6 engines. Personally, nissan engines are over priced here in the states. I can get 1jz/2jz mfor 500-1500usd less than an rb25dett or rb26dett. I'm sure prices are better over there in oz
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Post by NXTIME »

The main difference between the Supras, Z31/2's and 3000GT's is that our engines have a couple of cylinders less and are only SOHC.

Another major problem with the DOHC swap is the lack of a suitably stronger gearbox. I have always liked the idea of a 2.3-2.5L stroker DOHC - and a few guys are doing or have done them already. But you cannot go past the additional grunt of a TT 6 cylinder ;)
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Post by TOMSUN »

I agree... The grunt from a 6 cyl jammed into a car that was meant to have a 4cyl is cool... Weather it be a V6 Mitsubishi of an inline Toyota or Nissan 6cyl... If you want to go really fast it's easier to extract big power from bigger engines...

The catch is getting it street legal.

Otherwise it back to flowing mor AIR...
...higher RPM's and more BOOST!!! :twisted:
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Post by airbats801 »

One thing I like about the states, they dont care for the most part, what is in your engine bay :).

I gotta agree about the 6 cylinders for the ibhg power. Its nice taking say a toyota 1jz/2jz and making 600hp without even thinking about touching the engine internals.

The transmission problem does suck. If chad ever gets the t56 adapter plate going tor the g54b, it will give all you dohc 4g63 guys something to work with.

I know buschur racing makes some kind of auto adapter for the narrow block 4g63, but then again that doesnt mean jack to you guys now that I think about it.
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Post by quest »

Makes alot more sense to me to get big torque from a bigger displacement motor on stock innards, than a built up 4cyl.

Heavy ? How many other 4cylinders have 3150 pounds to haul around ? Compare it to a 2550-2700 pound s13 for eg.

Not only is adapting a stronger gbox needed for a hi-output 2.4L dohc mitsu 4, but such motors are costly to build. Add it up.

An inline 6 fits well under a "long" hood - mk2 supra, s13, etc... but wouldn't be my choice for a staz

The nissan vg30Et sohc became a favorite of mine after seeing them stand up to serious 'abuse' constantly. Never seen one with a rod bearing knock, but personally seen quite a few 1jz/2jz die from it.
The vg has a 3.3L version. They're available and dirt cheap
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Post by SpidersWeb »

also the Windsor 302 V8 fits. A V8 Starion just sold here, but new owner took engine out and resold the body.

Definately the way to go fast. Personally for me, the car is a bit of history, and so is its 4 cylinder motor. So 4G63 is my preference, and will happily generate sufficent power to rocket the Starion along to a satisfactory level for most people. Some people aren't fussed, and will get alternative engines, thats all good, but I know personally I just couldn't do it.

Its an interesting culture difference. Here in NZ and I imagine Aus too, most like to improve what we have, where as most American folk (that I have spoken too) are instantly 'bigger engine'. I dont mean that in a nasty way, and it does make sense, but its just an interesting difference I have found from talking to people about cars on the internet a lot.

I actually love the idea of having a fast car, and telling people 'its only 2L', because it shows the efficency and perfection of that engine. Larger engines are more cost effective, but on a personal level, I would lose pride.
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Post by jrod82 »

SpidersWeb wrote:Personally for me, the car is a bit of history, and so is its 4 cylinder motor. So 4G63 is my preference, and will happily generate sufficent power to rocket the Starion along to a satisfactory level for most people. Some people aren't fussed, and will get alternative engines, thats all good, but I know personally I just couldn't do it.
Agree with you totally, brotha-from-anotha-motha. If you put another engine in it, it's not really a Starion any more :wink:
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Post by quest »

nothin' wrong with keeping it original.
I wouldn't go so far as to attach my 'pride' to it :)
A dohc seems just as 'at home' in a staz, seeing as its "technically", only a twin-cam head conversion, eh. If you're a 'purist', even mpi/sonata would be forbidden, no ?

It all boils down to where your priority lies. When the hood is closed, you press the go pedal and it plasters you in the seat.... the "brand" has no affect on the pleasure, really. Choose a path that suits u best

I only came into the staz 2.0 sohc while searching for a replacement powerplant for my old 3tc powered corolla. Absolutely no regrets and couldn't be happier. I myself am VERY interested in finding the power limit of the 2L sohc motor also.

As much as I enjoy swaps, my u.s. staz keeps its 2.6... after seeing what folks have done, with relatively little effort.

Keep in mind, u.s. guys pick up starquests for little to no money. A great portion on SQclub have 2,3 or even 4/more starions, so donating one to a swap is like nothin'.... many of 'em would have been destroyed anyway... and -THAT- sux!
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