Twin Cam Piazza

[zep]

www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Isuzu/auction-80291836.htm

[oncutties]

yeah i seen that might be keen on it but i was wondering how easy the conversion will be to make it fuel injected.i was thinking about wacking some carbs on it. some advice would be helpful

[burntrubber]

If its anything like the single cam it will be fairly simple on the EFI side. You need custom exhaust manifold I think Mikuni knows he's done it I think.

[mikuni]

Yeap, I've got a full exhaust you can buy. It has a custom manifold and should bolt straight up to a gemi. Other than that the conversion is pretty much the same as a single cam. I would say go ahead with the carby option. The standard loom is massive and confusing. I think the go is using a camira dizzy so you don't have to use the computer at all. Manifolds from the single cam don't fit though so you will have to make up an intake aswell, but that will be pretty easy/cheap.

Oh, I'm guessing the loom is more complex than the singlecam because it uses the I-Tec setup which is by Isuzu and it was one of the earlier attempts at injection by them. The single cam uses bosch injection I think.

[oncutties]

so will the gear box bolt in aswell. cherrs for the help and what about the running gear dive shafts etc. ill be keen on the exhaust to.

[zep]

You'd be hard pressed to find one of the carby inlet manifolds! Would be a mint conversion tho, go for it!

[mikuni]

I got a custom intake priced for my bike carbs onto the ecotec and the dude reckoned around $120, so will be similar for the isuzu engine.

I'm not sure about the gearbox because I had mine in a chevette and it deffinately didn't bolt up. But since the G200Z boxes do bolt up to geminis I wouldn't be surprisd if the twincam ones did also.

Again, driveshaft didn't bolt up to the chevette diff, but if the gearbox is similar to the singlecam one then it may do. Average price for modifying a driveshaft end and getting it painted and balanced is around $120-150 so shouldnt break the bank if you do need to get that done.

Sweet I'll chuck up some pics of the exhaust, I had it on trademe for a while and I got it done thru pitstop so it cost me quite abit, but just make an offer on what its worth to you for the conversion. Selling it cheap will be sweet if its helping someone do a twincam conversion.

[zep]

Hrm, ok, so it's not as expensive as I thought to get an inlet manifold made. Although, what you need is really no more than an adaptor plate so the carbs can just bolt onto the ports, correct? I guess it would be the same if you were to run twin sidies or something on the W engine tho.

This could be a very cool project, I say go for it!

[zep]

Just found this:

g200w out of isuzu piazza xe drops in,
motor designed to run twin 40 mm sidies but come out with fuel injection standard , sidies will actually bolt directly to head,
you will need to swap to 1600 mounts which handily bolts right on get some nice new engine mounts though the rubbers wear out after a while and its easier to do it when the motors out,
you will need to have extractors made as the cast one fouls on the engine mounts,
now its easiest to drop in a manual that came with the motor as the starter motor is on the passenger side and the bell housings are different,
the 1600 gear box mount bolts on and the shifter from a five speed will eliminate the remote shifter on the piazza box so you come up through the same gear shift hole factory drive shaft still works same splines etc,
now the fuel injection,
you just going to have to relocate your battery to the boot,
exhaust sensor must go into the extractors otherwise it will run like a bag of sh*t,
3 wires to hook up ecu one to power one to ignition and one to earth if you want i can take alook and give the color code,
i put a triple core radiator out of a triumph in with a relocated outlet,theyll cool down a 350 chev so they work well and theyre cheep, thermo fan a must,
use the piazza coil and u have to fiddle with the alternator or do what i did and slap the 1600 one on with a rewired to hook to the piazza loom,
good luck mate hope this helps
once i had mine tuned it ran great was cheap on fuel and took it to the track getin an lsd would have been next on the list

[mikuni]

Yeap zep, the intake manifold is extremely simple. For my carbs its simply a plate with the intake port holes drilled in it and holes for the bolts obviously. Then it just has 4 pipes coming off and the carbs are clamped on with rubber hoses.

I would suggest going with bike carbs just because they can sit on a 45 degree angle and clear the booster/brake master. If you run conventional side drafts they will foul with this stuff, I would imagine. Oh and bolting sidies straight onto the engine may be do-able but from what I have read you would want to steer clear of this. The engine will loose quite abit of torque and I would imagine the carbs would be very hot with no spacer there. Sounds like a crazy idea.