Isuzu G-series Twin Cam

cheers for the info, The extractors seem to be a nice size, quite large 4-2-1 that finish up around the passenger seat. What oil do you run in your twin cams? i seen mentioned they require 20w50, so im running penrite hpr 20w60 which is recommended by them for 20w50 engines. Just curious as the moto...

cheers for all the info. Being an 1800 i think ill lean towards the 44idfs, the motor deffinately seems to want alot of airflow. As the carbs at the moment run rich at idle almost to the point of fouling plugs and lean out above cruise. I read in other threads u mention an f2 emulsion tube, do you k...

cheers for the reply, The engine is already running 40mm idf webers and i prefer carbs over efi anyday. I found this rule of thumb info for sizing carbs on another site: For hot engines, vent size=(intake valve-2mm) For moderate street engines, vent size=(intake valve size-4mm) For mild engines, ven...

hi,
trying to find out the inlet valve size so i can size up a set of carbs for my motor, any help much appreciated. Its the zzr type g180w.

cheers,
danny

they are deffinately not originals, i had these made by a mate of mine. original pics here http://www.ozgemini.com/forums/non-tech ... ht=twincam

yeah i was jsut chasing the numbers so i could check them to see if anythign was out of the ordinary, but i think its jsut a slight exhaust leak now so once i fix that ill know for sure.

anyone know the g180w valve clearances?? just so i got another thing to check on the weekend to try track this noise down.

hmm i think i have the penrite hpr40 stuff in it that i used to run in my turbo gem. ill check the bottle tonight. my oil pressure gauge seems to be acting normal so i hope it isnt an oil related problem. my tappet cover is weaping a little so i will take it off and have another look for damage to t...

ok my twincam has been kinda rattly since i first fired it up but its getting louder. i know these engines tappets are done with shims so what else can cause this noise in the topend?? its particularly at numbers 3-4 cant pinppoint which one. with the tappet cover off all looks good with no obvious ...

yep all modplated and regoed now. still playing with the carbs a little as its got a lean spot im trying to get rid of. was a mixture of things in the end, to much fuel, to much advance, 2 of the leads had issues and a tiny blockage in the rear carb. seems down on power though atm but i havent had a...

ok i tried searching and i either put in the wrong things or it just isnt about. anyway does anyone have the factory redline of a g180w? found a few varying numbers but am just after the factory limit as i wanna be safe as it just wants to keep going.

i think you will be stuck with whatever they are asking really as not to many people in aus have enough twincams to split parts from. or you could go to a cam shop and get a newy made.

i was thinking last night about this and was wondering. if i was to get custom billet cams made up with the same profile on the closed section of the cam, the only difference is gong to be the total lift?? based on that is there any need to mess about with the shims due to the clearance being the sa...

sounds interesting and a bit cheap. let me know how u go.
i contacted tighe cams last year and they have profiles from when they backed some rally guy back in the day. they didnt mention shims etc though

im only going on what my twincam has adn the answer is no. they are a thin and much longer piece of flexible metal whereas the g series type is solid and very short.

hmm looks like im staying with the stockos then as its only a daily lol

hmm my old worked g180 with twin 40 idfs ran fine on the stocko at 12v. but i have a high volume pump here i might as well use to elliminate a possible problem. nah its the 2nd pot thats coughing. i have the carbs mounted dead flat with no booster and the master sits below the trumpets so they arent...

hmm that could explain alot actually, shouldnt be though as brand new soft mounts went on. im running the stocko pump on 12v with a redline carb reg set at 3.5psi.

cause they where cheeeep. im regretting it now but thats for sure. i thought they would have been alot closer than they are but
im trying to get a set of webers/dellortos atm. but its a daily so i dont care if its not perfect as long as it runs safely.

ok i have my 1800 running on a pair of solexs i bought from a mate that had them on a 2l sillycar twincam. now these carbs no matter how i adjust them jsut want to run lean and one throat likes to cough and wont balance out. also when u try rev it is a mission for the revs to rise and then it takes ...

is it ok to get a differnt set of cams and put them into my engine on the current bearings or do i need the matching bearings for the cam?

its got 2 terminals at 90 degrees to each other coming out of a large square box on the side looks identical to this one http://workshopmanual.org/twincam/viewtopic.php?p=685&highlight=&sid=cb63ea330c855204ecab00ce3c5f33b5 but i will have to open it up to make sure the guts are still there, ...

yeah this is only a daily driver but. ive got a crane cdi on it but that turned out to be the wrong module for a magnetic pickup. basically i need to know if they have an external module or is it inside the dizzy? hopefully its inside then i can just hook the wires to the coil and im away

the twincam in my panno was originally run by an oldschool haltech which i have since ditched in favor of a set of twins. now the last piece of the puzzle is spark, is the ignition module in the dizzy like the rb setup?? or is it supposed to have an external module?? if its to much hassle i have a c...

ive made the switch to twin cars as the computer mentioned has no support or software available so its basically free to whoever buys the manifold as u may have more luck than me. the manifold was in perfect working order when removed as well as the computer, the tune was waaay rich and thus the car...