ok, i was wondering if it was possible to use a vg33 block to increase the bore of my engine, if it is possible what would i need to do/change and does anyone know roughly how much it would cost. i was thinking it may have been possible to bore the engine to about 3.2L but apparently the block walls aren't very thick. i googled and found nothing, i searched here and found nothing relating to using a vg33 block. im about to go try some other 300zx sites but any help is appreciated. on a side note, i have heard jun or blitz make a stroker kit to take displacement to 3.2L does anyone know where i could get one and what it is worth?
Are You wanting to use a 300zx engine? cause the 300zx z32 engines arn't vg33... they are VG30DE (NA) or VG30DETT (TT) that is probabally why u arnt getting any hits on google or the search function
Re: Are You wanting to use a 300zx engine? the vg33 is the engine nissan used in alot of the pathfinders and various 4wd type cars in the USA and japan etc. i have heard stories of people swapping the block over in their zeds and running a vg33et. the vg33 supposedly has the same stroke as the vg30. but the 33 is only SOHC, so i assum i would need to swap heads etc over. i guess what i am asking is if the vg33 block will bolt up to the rest of my engine (ie a vg30dett), or is there a better way to increase displacemnt?
Re: It will probably be cheaper to stroke it. but wont stroking it effect the engines ability to rev? will boring the engine have any bad side effects?
The biggest bore you can use is 40 thou over That gives you 3.1 litres. and a fair bit more power. The stroker would give you a big bag more midrange torque. Stroker kit for VG30 is BIG MONEY.
could always stroke and bore bore to 3.1L and get a "3.2L" stroker kit which would bring it up to 3.3L i dont know how much i'd trust it though... but in saying that I have seen 90mm pistons to suit a vg30dett which is pretty insane.
Probably dont want that one.... There are 2 listed on the SGP site. The one from SGP isnt a stroking kit, its simply overbored pistons. The one from JUN is about $7,000US from memory. If your interested in a stroking kit then probably these guys are the only ones with a realistic price: paeco. Ive emailed them before and you can get a kit with a 1/4" or 5/16" increase in stroke. Can someone work that out in displacement? Stock length rods are used and the pin holes located higher up the pistons. JUN gives you a new forged crank though, and Im fairly sure this one is just a stock crank re welded so I dunno how much Id like to trust that to huge HP.
Was just reading an old post from someone going to do 3.8L ! I couldnt find any followup posts to see what eventuated though. He was resleaving and using 91.5mm pistons and stroked 1/4". God 3.8L would really fire up some td05s or maybe sports 700s or something. Anyone got any idea what the real effect this would be on RPM range?
My understanding from fair bit of reading is that anymore than 40 thou (1mm)over bore is an issue. Without a selected block that has had the water cavities exrayed to make sure that it hasnt cut too close to any water channels. I have also read about issues with block twist that can make boring out to bigger than that size a problem without resleaving the bore. This sounds like too big a job IMHO. But Stroking the engine was something I looked into. The Jun kit is the only one I could find. And as I said HUGE money. It would have been cheaper to buy that 350Z engine/box put new forged pistons (low compression)and forged rods in it, than do this.
i was wondering about this some time ago myself. there were a few posts with discussion. try a search for vg33, that brought up a few things for me, but i think some was on the old board which i'm not sure is accessable.
with a good set of lightweight chromoly rods + forged pistons and lightened forged crank it shouldn't affect the max rpm.
