I have a 2005 VK45 longblock that burns oil and a '92 VH45 that's locked up. The ultimate goal is a single turbo running 8-10lbs of boost.
Q1: How do the VK's heads hold up to boost with their titanium valves and aluminum lifters?
It stands to reason to use the perfectly fine VK heads with their lower rotating mass and rebuild the beefier VH shortblock, but it would be good to know whether or not the VK heads are a weak link.
Q2: Can the CVCTS be adapted to work on the OBDI Q45 wiring harness and ECU? Probably not, but why not ask?
Q3: It seems that the VK intake manifold is a lot lower than the spider, which would certainly be nice for my clearance issues. Will the VK manifold bolt up to the VH? Is there any flow advantage? I would probably remove the variable intake system, but would there be any advantage/possibility to make it work on the OBDI Q45 wiring harness/ECU?
Q4: Is there any flow advantage of the VK exhaust manifolds over the VH? If so, do they share the same bolt pattern (assuming I stay with VH heads)?
And last but not least...
Q5: It will probably save me many-a-mounting-headache by relocating the alternator to the VH41's location in between the cylinder banks. Can I easily use the bracketry from the VH41 to relocate the alternator?
VK and VH interchangability
-
elwesso
- Posts: 30810
- Joined: Sun Feb 23, 2003 4:52 pm
- Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT - Location: Indiana
- Contact:
Re: VK and VH interchangability (z1 zonly)
The VK and VH have different engine codes for a reason, theyre similar but not really that interchangeable. Ive never heard of anyone putting VK stuff on VH motors, or vice versa.... I'll try my best to answer your questions individually...
Really everything you're asking comes down to this- people havent messed with VH's or VK's (especailly VK's since theyre not dirt cheap like VH's) enough to really "know" what is going on. More/less its not like people buy VH and VK motors and just see what fits what (maybe you should be that guy!)
1. I dont know about mounting the VK heads to the VH. I dont know why one would do that, outside of weak cams and valve springs the VH heads are amazing... basically ready to go for 600HP out of the box.
2. HA! Thats all i have to say to that.
3. I doubt the VK manifold bolts to the VH, and I would never disgrace the VH by bolting a VK manifold to it. The vh manifold is a hardcore manifold ready for race use, equal length runners specially tuned.... its an amazing setup and unless I wanted to run 1000HP or so i wouldnt mess with it.
4. If anything, the VH manifolds are gonna be better than the Vk ones, im pretty sure the VK uses log style where the VH uses tubular ones... Ive had many people tell me the VH manifolds look like shorty headers for a mustang or something.
5. Im pretty sure the VH41 block is different from the VH45 as far as thats concerned... so i bet you cant just swap brackets since i bet a bunch of other crap is different.
Really everything you're asking comes down to this- people havent messed with VH's or VK's (especailly VK's since theyre not dirt cheap like VH's) enough to really "know" what is going on. More/less its not like people buy VH and VK motors and just see what fits what (maybe you should be that guy!)
1. I dont know about mounting the VK heads to the VH. I dont know why one would do that, outside of weak cams and valve springs the VH heads are amazing... basically ready to go for 600HP out of the box.
2. HA! Thats all i have to say to that.
3. I doubt the VK manifold bolts to the VH, and I would never disgrace the VH by bolting a VK manifold to it. The vh manifold is a hardcore manifold ready for race use, equal length runners specially tuned.... its an amazing setup and unless I wanted to run 1000HP or so i wouldnt mess with it.
4. If anything, the VH manifolds are gonna be better than the Vk ones, im pretty sure the VK uses log style where the VH uses tubular ones... Ive had many people tell me the VH manifolds look like shorty headers for a mustang or something.
5. Im pretty sure the VH41 block is different from the VH45 as far as thats concerned... so i bet you cant just swap brackets since i bet a bunch of other crap is different.