LUVTruck.com

So after my V8 luv is done ive decided for the cool factor i want to mod the stock motor i pulled out of mine and put it in another luv. I want to shave the head and ill probably overbore considering this motor has over 300,000 on it. do some head porting for better flow. does anyone know the stock flow numbers on a stock head? does anyone make bigger valves? And ill be doing a cam regrind. I have no idea where to start as far as a profile on the cam. what are the stock specs if they're available? any clue on how much power the stock crank and connecting rods can take? or if there are stronger rodes for it?

Check out some of the Isuzu sites from Australia, they get some amazing HP from these engines. Some of them are members here, do a search.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

cant seem to find any of the aussie sites, any links?

Well talk to a good machine shop see how much you can bore the motor out, i think its 60 over, then find out how much you can shave on the head. the more you shave the more compresion you get. then port/polish the head and all the inlet and outlets....after you done that try to re grind your cam/crank......idk if you can get performance pistons but i think you should be able to because the pistons i ordered for my motor were pistons from a toyota they have the same numbers so i know toyota have performance parts so check into that....The you should try and get your hands on the r1 carb set up you can read about it here. viewtopic.php?f=4&t=22720 then put a turbo on it, add header, exhaust.....and you should be done if i am missing stuff ppl will fill you in. i would like to see how much this little luv motor can really push out now days with everything going on it should be able to push some hp with some upgrades.....if you can use toyota pistons that = an open door to performance...as well as if you can shorten the conecting rods? idk if this is true but it was said by geting shorter or longer conecting rods you can turn a motor into a stroker? ask one of the guys who have built a 383 about this....i know that the crank is what makes a 350 into a stroker...not sure though research is what is ahead of you...but from reading and going through everything myself these 10 things i have told you are what i know.

1. bore block
2. shave head
3. find pistons (call northernautoparts.com) ask them if they have pistons for your truck and if so try and get performance ones.
4.see if you can do somthing with your cam and your crank.
5. look into ctmandu r1 carb set up, reading everything on this site it looks like that set up will get you the most rpm/hp/torque.
6. get a 5 speed swap.
7. if your truck has the 4:11s you should be ok with your gearing.
8. you need to order a header (you can get a brandnew pace setter header for about $100.
9.Go with a 2.5in exhaust.
10.add a turbo to the r1 set up ctmandu said it could be done.

and in the end you will probably have the fastest 1.8l engine lol.

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Chevy luv with a redneck grabber green paint job lol...
these are links to my luvs pics.
http://s922.photobucket.com/albums/ad68 ... v%20truck/

viewtopic.php?f=33&t=22598

I had planned to do all of that minus the turbo. I'd rather not deal with that. I forgot the r1 setup existed. I'll look into it. Still trying to figure out a good performance grind on the cam. Ideal with a 1500-6000 operating range or a 2000-6000. I was hoping to find some stock head flow numbers and run some estimated port flow numbers on the dyno sim.

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My old but now gone Luv...

i think i just saw your post on ozgemini
and as i said on there as luvtheG180
grab a set of isuzu impulse intake and turbo exhaust manifolds and run about 12lbs of boost.the stock internals are safe up to about 14psi of boost. but to be safe i wouldnt run higher than 12psi (just to save yourself from catastrophic failure)
and that will bump your power upp.

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

stock internals will really handle that much boost? id of never guessed.

http://www.ozgemini.com/forums/tech/vie ... c&start=15

there are a LOT of threads on ozgemini about how to improve the g series engines
if your going to stay with a N/A setup i would go 200 block, 161 or 180 head, either the r1 carbs or the weber and an offy intake, you could probably get a hold of the head gasket from the turbo g200 for an impulse so you can run higher compression.... electronic ignition and such are all good things to look into. i have a spare g180 in my garage im thinking about building as a performance engine. still deciding on running a high comp n/a engine or a turbo setup
the reason i say go turbo is because they already made a turbo'd g200 in the impulse so the parts are available and dont need to be custom made so it will save you $$$ on tracking down components

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

well if you say the stock internals will hold up to a turbo may as well just do it. still have no idea as to what sort of cam to run. how about the stock head. is it good for porting? and are there bigger valves for it?

you can use the g180 head but have a machine shop fit the g200 valves as there are bigger...

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My old but now gone Luv...

from Crow Cams in aussieville

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Exhaust Duration 0 at 0.050 0 Advertised

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Hold on to your lug nuts, it's time for an Overhaul!!!!!!!!!

Or you can have your cam re-ground by Delta Camshafts for less $$$.

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1979 Luv 2wd, rebuilt impulse G200, Weber 32/36, Offy intake, Delta cam, Pacesetter header, Flowmaster, 2 1/4 inch pipe, lowered 4 inches, Bed shortened 10 inches, 1997 Tahoe wheels with 225/50R16 Toyo Proxes.

ask around on ozgemini.com for specifics for the buildup they are experts on the g-series engines over there! not sure what the stock engine is capable of holding for exact boost PSI i dont wanna say one number and have it not work out for ya.

im hoping to rebuild my spare engine with a custom turbo manifold and assemble an EFI manifold to hook up to a G180 block with G200 head (i am aware this is opposite of most people. i want LOW compression so i can safely run higher boost and utilize the bigger valves.)
and if i dont go turbo.. i would go with what everyone has said.

g180 block, mill the head, get it ported and put the g200 valves in.
the australians i have been talking to have had a lot of the same things to say about the g180.. mainly that the heads need to be opened up for a bit more flow. in stock form they just dont get the job done.

THE G180 is notorious for having head gasket failures!!! so if you choose to go turbo you will have to find a way to deal with that problem, copper gaskets?? maybe one for an impulse? i dont wanna set ya up for a costly failure with incorrect info so i had to give ya that info.

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

OKAY
after asking gemracing he told me the standard G180 can handle approx 15psi of boost, stock head gasket and head bolts.
you would likely want to run a bit lower than the max just to keep it safe

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

Actually depending on the stock compression of the G180 you might not want to shave the head too much if you plan to turbo it. You do not want to have over 9 - 1 compression for a turbo application otherwise you WILL blow a head gasket for sure. I've seen some people run 10 or 10.5-1 compression but these were on engines that have numerous performance upgrades available. The reason for the lower compression is that the turbo increases pressure inside the chamber so if you have too high of compression you will more than likely mess something up. Just my 2 cents.

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When in doubt floor it. If you can't floor it then you've doubted yourself.

and in the end you will probably have the fastest 1.8l engine lol.[/quote]
second to darrens he currently holds the record for fastest g180 without spray

1. bore block, (but remember the farther you bore the smaller the space between 2-3 gets.
2. shave head (if not going turbo) stock compression is 8.5:1
4.see if you can do somthing with your cam and your crank.
dont bother messing wit the crank it can handle a lot more than you will likely ever run through that engine. darren (gemracing) has run a stock crank at over 550HP. for quite a while with no problems, the rods are tough too. the only weak point in the engine is the pistons and they can hold out to boost in their stock form as well.
5. look into ctmandu r1 carb set up, reading everything on this site it looks like that set up will get you the most rpm/hp/torque.
go with 03and newer throttle bodies from the R1 if going turbo. 02 or older works for N/A
6. get a 5 speed swap.
9.Go with a 2.5in exhaust.
10.add a turbo to the r1 set up ctmandu said it could be done.

the general info i got from everyone on ozgemini is that the majority of the power loss on the g180 is from the head. since it was designed to run and run and run forever but not be anything really impressive on the dyno. if you get a GOOD porting job done on the head and install the g200 valves you will be in the clear for a turbo setup or a beast of a N/A motor... if i had the money i would already be way ahead of ya on getting a beast of a g180 built since no one seems to be interested in them in the US but they really are great motors to beef up since they are built like tanks and the 1.8 is the best build platform of the 3 since it has some space between cyl 2 & 3 to save head gaskets, strong internals and an aluminum head. it just needs head work and higher compression to be great as a N/A motor or head work, efi and a good t3/t4 turbo to be a BEAST

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride