Guest ZFetsh Posted May 14, 2006 Share Posted May 14, 2006 What can I do to a VG30DE (Y31 VG30DET motor with turbo removed and NA pistons) to get a bit more power, but more importantly, better responce, without putting any form of forced induction or fuel system additives (ie nitrous) So far, I've thought of Lightweight flywheel Lightened rods (Carillo, 450hp rating) Ballanced internals Lightened crank pulley and accessory pulleys Electric water pump (are they available for this engine) Engine will be put in a slick top Z32 300ZX, fuelled for 300hp, and ECU program will be custom written on a dyno by a workshop I trust. Driveshaft will be a lightened 1 piece, plenum will be custom built and will get a Q45 throttle body, air con pump will not be removed from the motor. If all goes to plan, it will be a damn nice road car! Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted May 15, 2006 Share Posted May 15, 2006 Make the car as light as possible! Quote Link to comment Share on other sites More sharing options...
Guest ZFetsh Posted May 15, 2006 Share Posted May 15, 2006 Yes, thats the general idea on the bodyshell side of things. Little bits like an alternative to the factory air con (30kg saving) and replacing the heavy seats on electric rails with fibreglass bucket seats on mechanical rails (20kg saving) certainly add up. The car also doesn't have ABS or RWS, so theres a little bit of weight saving there too, but the more important bit of those 2 being simpler to work on! Quote Link to comment Share on other sites More sharing options...
RedBeauty84ZX Posted May 15, 2006 Share Posted May 15, 2006 JWT Cams Quote Link to comment Share on other sites More sharing options...
mtcookson Posted May 15, 2006 Share Posted May 15, 2006 higher compression pistons, headwork, valve timing (can easily make or break an n/a engine). i think the q45 throttle body might be a bit of overkill for an n/a engine. most mild turbo engines and even some higher power street setups don't even need 3 inch. on the valve timing part of it overlap is an n/a engine's best friend. if you can get it timed to where the exhaust helps suck in fresh air from the intake that'll help make quite a bit more power. that particular setup is how n/a engines can get 100% and better volumetric efficiency. a company built an n/a VG30E that made 300 hp and i believe 240 ft. lb. of torque. you should be able to beat that pretty easily with enough work on the engine. (that particular VG30E costs right under $9,000 from that company) Quote Link to comment Share on other sites More sharing options...
Guest ZFury Posted May 18, 2006 Share Posted May 18, 2006 on the valve timing part of it overlap is an n/a engine's best friend. if you can get it timed to where the exhaust helps suck in fresh air from the intake that'll help make quite a bit more power. that particular setup is how n/a engines can get 100% and better volumetric efficiency. With stock cams? Quote Link to comment Share on other sites More sharing options...
260DET Posted May 18, 2006 Share Posted May 18, 2006 You don't want to hear this but for your power aim the VG30DE is overkill weight wise. Nissan V8 would be a better choice, may not fit in the tiny Z32 engine bay though. VQ engine out of a 350Z is also a good alternative, six speed gearbox. Nothing helpful to add, MTC said it all. Quote Link to comment Share on other sites More sharing options...
mtcookson Posted May 18, 2006 Share Posted May 18, 2006 With stock cams? A lot of Nissan's stock setups do very well, especially with the variable valve timing, but of course it can always be improved since they have strict emissions to follow and have a power limit so to speak. A Nissan V8 would be a great choice as they're lighter and stronger than the VG's. The VH45DE out of the 90-96 Q45 can be built up quite a bit to make some awesome power N/A or with forced induction. Plus, if you wanted to go that route, there's a guy now making some transmission conversion plates to mate the Z32 5-speed to the VH45DE. Since you're wanting to go N/A the V8 idea is actually a very good idea. They will fit into the Z32 engine bay as well... a few guys have already done it and I'm actually doing that exact swap myself. Quote Link to comment Share on other sites More sharing options...
Guest ZFury Posted May 18, 2006 Share Posted May 18, 2006 Just curious.... What about the tranny and drive shaft?... never mind just saw the "conversion plate" comment. Quote Link to comment Share on other sites More sharing options...
veritech-z Posted May 18, 2006 Share Posted May 18, 2006 When Sports Compact Car magazine built their project 300zxtt, they did a whole lot of feature tech articles about building the Vg30dett, and while not all of them would apply to an n/a build some of the things they did would work well on any engine: they polished the coolant passages in the heads as far as they could to get rid of casting flash, and they used thermal coatings from www.swaintech.com to manage combustion temperatures. I know the jury is still kind of out on engine coatings, but I haven't heard anyone have bad results with these guys at least. Cosworth pistons have coated skirts, for whatever that's worth... Quote Link to comment Share on other sites More sharing options...
RedBeauty84ZX Posted May 21, 2006 Share Posted May 21, 2006 You don't want to hear this but for your power aim the VG30DE is overkill weight wise. Nissan V8 would be a better choice' date=' may not fit in the tiny Z32 engine bay though. VQ engine out of a 350Z is also a good alternative, six speed gearbox. Nothing helpful to add, MTC said it all.[/quote'] The engine bay is rather big, i dont know why you think its tiny. An LS1 looks small in there, its bigger then most V8s engine bays. Escort built a 600HP NA with nitrous. Quote Link to comment Share on other sites More sharing options...
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