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Originally Posted by 370Z944 I'm waiting to see the nismo. If it's not super hella tight 3000, I'm gonna put in a vr38. Seems I could just swap a vr38
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#1 (permalink) | |
A True Z Fanatic
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Where did you get the idea that the VR38 heads would fit on a VQ37 and be better. The VR38 block is the valuable part. Not sure what you have been reading or have been told. That's a No go though. |
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#2 (permalink) | |
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er"? Whether the vq heads are better is subjective. They're not built for boost, and I'm pretty sure they wont line up with the GTR intake and plumbing. I could be wrong tho. I havent sunk my teeth into all the fine details, yet. I'm certainly not seeing how it's a "no go" though. Unless you got schematics proving otherwise. They also share the same core chassis FWIW. If any nissans were truly bespoke, they'd be priced with ferraris, bugatti, pagani, etc. The FM platform is what all the rwd nissans share. Some chassis get sent down the line to be dressed up as altimas.. Some get sent over to the nismo plant and dressed up as sports cars with a vq or vr... Also, in 20 years it will be nice to have as many matching numbers as possible when a concourse judge takes a long gander at it. lol |
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#3 (permalink) | |
A True Z Fanatic
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Location: Ga
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The VR38 and the VQ37VHR are not the same block. They are way different. The VQ oil pump is ran on the crank. The VR38 oil pump is ran via a chain on the crank. Totally different. The VR38 block is closed deck with 13mm head studs. The VQ is open deck with 12mm head studs. The engines are totally different. Can't leave off the drive shaft running through the factory oil pain of the VR38. VR38's are taller also. |
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#4 (permalink) | |
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"The VQ oil pump is ran on the crank. The VR38 oil pump is ran via a chain on the crank." The crank is not the same. The oiling difference I would assume is for a dry sump. The VR has 2,5 mm longer stroke. So yeah, def different crank.. Same block, coolant passages and bolt patterns tho. "The VR38 block is closed deck with 13mm head studs. The VQ is open deck with 12mm head studs." 1mm drill and tap, then call ARP. Done. Just needs to be the same pattern. The deck, again.. put whatever liners you want in it. Doesn't even have to be the same material nissan ran. Hell, put iron sleeves in with closed deck, and call mahle for some pistons. I like JE too. You could probably put in the VR sleeves even. The material you choose for sleeves determines which pistons you can run is all really. Closed deck is really necessary for high boost apps. Hence why nissan put it on their boosted version of the FM sports car platform. On low to moderate boost, you wont see wiggle. Especially if tuned properly. My 944 has an open deck. I put 50k on it with 16 psi.. no issues. Again, decking, oiling, sleeving.. this is all ancillary to the actual block/crankcase. All the rwd nissans share many of the same core parts. They do this to save money. and manufacture a sports car people can afford vs the GTR hardly anyone can afford. It's a tuner car, it was literally designed to be finished and tuned by the end user. If you want nissan to dress your z chassis up from the factory with race tech, and performance to their liking, its called a GTR. The GTR doesn't do it for me. It's a bloated, ugly pig IMO. Not how I would dress it up, thats part of why they make the z the way they do. It's got to fit a budget. You could spend200-250k on a nismo gtr dressed up just how nissan thinks you should want it, or you could buy a z for 40-50k, and for another 100k(max high number) plug in the parts and configure it how you want it. RWD manual FTW. I'll totally highjack their engineering, and develoment tho. Put it all into one car to my liking. Mwahahaha. They do have tasty milkshakes... Sip, sip, gulp. ![]() Last edited by 370Z944; 07-26-2022 at 06:40 PM. |
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