Isuzu G-series Twin Cam

nice one very neat

the guy that did mine had the design in a book. but 7psi with lpg will be fine with the standard head gasket.

when you say gas do you mean nitrous if so how much and how much boost.i reckon you could sell the permaseal gasket for the same price as a copper gasket since its nearly impossible to get them. and if you've got the engine apart get some o-rings put in and you wont have to worry

you need to assembly th bottom end and measure how far the pistons hang out the block and work out its cc then minus that from 55cc and thats your combustion chamber size. i think you need to get a plasticine mould of the top of the piston then measure the cc the same way you measured the combustion...

if its got standard pistons they have a dome on them so you need to subtract the dome from the 55cc. is the standard comp ratio no help or have you changed things? i just sed the calc you put a link towith your values and got 8.6:1 with out adding the dome the standard cr is 9:1 so this means the do...

you'll need a manifod inbetween the throttle bodies and head. also you'll need thin throttles with a plenum chamber to turbo it. i believe with turboing your better off just using one large throttle body. multiples work best on n/a motors. so spend the money on other parts.

you need to talk to an engineer. but if yoy can get enough proof the twin cam came out of a gemini you don't have to get it engineered.

where you can see the copper is a special gasket for the timing cover andis seperate to the head gasket, but you never know. it'sjust like xmas
hopefully it's full of goodies.

hey elky have the zzr diffs got different ratios. nut161 said he had 4.3:1 in his. id be very interested in a set of these.

i would pull the tapet cover off and take some photos of the cam area and pull the sump off and take photos especially of the bottom of the pistons. post them up and we can have a guess for you. leave the head on if you can. also get some diesel and flush the crap out of it. all the parts you are ne...

the lsd he is talking about is out of the small salisbury in a wb ute cost about 500-1000 and you will blow it to bits. what you need to do is get a romac 28 spline full spool less than $400 and a couple of shortened commodore axles and you'll have a very strong diff but it will be locked so you'll ...

your right IZU069 the fuel filler doesn't need to be changed since leaded fuel doesn't exist in petrol stations.

chuck some pictures up and we can start explaining what all the bits are. also where are you located. i think most mechanics wouldn't know what the motor is or rip you off after seeing you don't know much about cars.

the top one looks like theearly tx 4 spee which aresupposedly getting rare and stronger the other two look like zzr 5speeds. have a look at the spline count where thetailshaft goes in that might help.

it looks like it might need a tidy up. also you want to see if there is a module inside connected if so one pin goes to possitive and one goes to the negative side of the coil i think. if you've got a points coil you'll need to replace it or atleast remove theballastresistor.

im after the alloy cover that goes on the front of the motor on top of the sump and crank where the timing belt runs through. need 1 urgently to finish putting my engine back together. can be off the 4zc1 or d1 motor. phone 0408623556 or pm. will take whole motor with sump if the price is right. i k...

be careful of the cheap chinese manifolds cheap stainless and even cheaper workmanship. ive heard many stories of the manifolds cracking on the welds.

my twin cam project has been put on hold untill i get the drag car finished but if i find more info ill put it up.

yeah he said the l1 cams were a very mild street camhe would even bother with he has plenty of more aggressive cam grinds of his own.

rotate to tdc on 1 remove front inspection plate.check bright links line up with dots on sprockets if not rotate 180 till they line up or mark them if you dont have bright links. release the chain tensioner plunger on the side. i think i took the sprockets off the cams and when re-assembled just tur...

i ran the same sclearance as the toyota 18r* 1.8 twin cam

there are valve clearances i just can't remember what they are.

thay are prone to tarve the rear of the cams of oil if the oil pump is worn and could of damaged the cam bearings. i had this on one of my motors but i can't see this making a tappet noise unless it damaged the lobe.
have you pulled the tappet cover off to have a look.

nowhere you neec to get a decent second hand one. ive got a couple or there is a few other guys on here that keep plenty of spares.

2.25 mandrel bent or 2.5 press bent will be fine just run 1 straight through muffler.