Same cogswapper they use in the new ZR1 vette and in the ACR Viper. Hardly a slow box. Depends if you plan to have enough horsepower to use it I guess.
ANdy Mac Is it same thing though? Isn't Corvette transaxle, or are you talking earlier model? RE VG plenum might look at this. Open for other ideas, keep em coming.
C6 vette, not the current one. It's an inhouse joke between me and chrispy JP. But yes, they do use the Tremec box's as an aftermarket option for alot of GM and FORD pickups, doesn't make it a bad box, strong as an ox and good ratio's, plus parts are cheap.
Be interesting to see how the VQ goes compared with the VG, seems like a lot of effort and cost for just a three liter motor though. But then I'm a VG fan Good luck with the plenum design, I'm in the middle of doing a single rear entry one for a single turbo VG. The Z32 got over the height problem with its crossover plenum setup, its the lack of height which makes designing an even distributing single rear entry plenum so difficult for a low bonnet line car like the Z32. An alternative is the VG30DET twin side entry plenum setup, which is complicated and would be very expensive to replicate. I also looked at a single central side entry plenum but the conclusion was it could take a lot of work to finalise a design which would give even distribution to all cylinders. Could involve baffling, maybe a double floor, who knows.
Once you have modified your x member the plenum fits under the bonnet fine ive got about 30mm clearance
they are a great motor if you put heaver valve springs in... got plenty more pics just not the time to post them
If modding the Xmember gives the stock plenum bonnet clearance then thats the way to go, believe me. On my previous post, designing a front single entry plenum would be the worst option, given that the bonnet slopes down towards the front. No room.
What are you going to do about the steering column? Cut and shut? Tie arms still work OK? They'll be on a bit of angle. Was this to get around making a custom sump?
We are thinking of making twin throttles either side at rear. ezzupturbo I take it you are running stock single turbo? That cross member looks trick and steering rack in the same place though as looks like it is further back which is bad, as changes the geometry of the steering? It needs to go higher than stock to correct factory born bump steer, moving it back changes the ark, and you would need to string line it and plot it's travel, you might find it changes Akerman angle? We may cut the cross member a bit but not this much and use Chrome Molly tube. We looked at doing similar mods to cross member, otherwise mod the sump, and went the sump mod option as we wanted bigger sump capacity anyway.
Im a fabricator by trade and still wouldn't modify the sump it looks like a prick of a job. not running stock turbo or manis using 35/40 with smaller rear housing and making some custom manifolds. trying to get some good injectors now. ive moded my x member again it only sits 35mm back from standard i doubt that bump steer is going to be a problem.just need to shorten steering shaft by 10mm. http://www.aus300zx.com/forum/showthread.php?t=293640
Re steering that is heaps, sometimes only a few millimetres can make a big difference. I a suggest plotting it before you further committing further. Call me to discuss we should liaise anyway or email sales@300zx.com.au, ph 02 9620 9000, and help each other on this project. Injectors side feed I am going to run 740cc Nismo with E85 which require at least 25% more fuel, so should make up to 380rwkw, with solid base pressure. Next step up is custom fuel rail and top feed 1000cc injectors. Check out this JTC car and custom steering rack set up. http://en.wikipedia.org/wiki/File:VQ30DETT_001.JPG
Opposite side twin feed plenum should be interesting, guess if its done properly to ensure even flow to all cylinders it should be good. Twin turbo, I was thinking of the original single turbo setup. And when suggesting modding the Xmember, steering/suspension geometry changes should be avoided unless the effects are known exactly and calculated acceptable.
are you going to consider putting a block guard in the engine at all for boosted applications? Being an open deck really leaves the engine with a lot of weak areas.
When it comes to everyone else wanting to do the same conversion, is it street legal to modify a crossmember like that, whats left of it , or best going another route?
That JGTC car is running a six throttle set up too nice... I agree that moving the rack back that far is going to have be repercussions and what about the strength of that crossmember having those angles in it must make it far weaker than the factory item
Hey guys my workshop makes the plate 4 the Vq30det ti bolt onto a vg gear box, ecerything supplied, Pm me if your interested
