turbonat240

I posted this in the V6 section but I realized that it's a more broad subject than this. I think that anybody interested in 6 cylinder swaps (especially VQ35) in 240z would like to read this thread : http://forums.hybridz.org/showthread.php?t=110436 so come take a look ! thanks

wow ! nice video ! but I was thinking more about street trim kind of upgrades on a stock block which is kinda limited to about 450 whp to keep the VQ35 alive. I was more thinking about the whp that's gonna be possible with a stock engine (and stock turbos for the RB26) but with completely remapped electronics (and boost level for the RB26). the difference would be about 120whp and 80wlb/ft. the numbers I had in mind are : r33gtr RB26 at 14-15 psi/with stock turbos (I know that they desintegrate past this boost level) around 370whp. here is a quote from a quick search on google about stock turbos power for a r33 skyline gtr:"my car now runs at 1.05 bar with 375 whp and 44kg-m of torque. Peak torque comes at 4000 rpm and stays that way till about 6500 rpm". 44kg-m torque equals to 318lb/ft. 350z VQ35 with free breathing mods (intake and custom exhaust) would be more around 250whp and 240wtq. here is an example of a 350z run: the car for this run had these mods:Car: 2003 Nissan 350Z Touring 6sp Mods: None Dyno: Dynojet 248/224 Whp: 232.88 Torque: 226.36 Car: 2003 Nissan 350Z Touring 6sp Mods: JWT PopCharger, UR Ultra Underdrive Crank Pulley w/ Gates belts, Motordyne 5/16 Plenum Spacer & Iso-Thermal Gasket Kit, and APS Cat-Delete Race Pipes Dyno: Dynojet 248/224 WHP: 249.45 WTQ: 236.49 so that's why I say less power in stock trim. thanks for your answer, I appreciate. I'd like more people to give me their opinions like that !

Hi everyone, I have been picking up info on the RB26DETT swap for my ’73 240z for over a year now and I was decided to stick with this choice for a while now even with the disadvantages of that setup (see the chart below). But a friend of mine (who has an RB26DETT in his ’95 240sx) can get me a vq35 engine for real cheap and that’s the only engine I had not thought about since I was sure it was too expensive. Well now I’m making lists for pros and cons between these engines and I’d like to know if I forgot something important in there ? Just before I get to that list I have to say that just last week I saw a dyno sheet of a tuned RB26 (still twin turbo and with upgrades to reach about 550hp at 22 psi) and was quite disappointed with what I saw. I would have hoped for more midrange torque and hp. Last year I happened to have the chance to drive a single turbo mkIV supra that had an IDENTICAL dyno sheet and although on the highway it was cool my first reflection when I got out of the car was : I don’t want a car with this type of laggy powerband as a daily driver!! So when I heard about a cheap VQ35 the ideas began to turn in my head. RB26DETT Pros: -makes a real nice sound and is not too loud (turbo lowers the volume a bit) -good power even with stock turbos (I was looking for about 350 whp) -potential for an “easy†500whp -quite easy to fit in the engine bay as it’s the same layout as stock(inline6) and info on the swap is already available. Cons: -expensive to buy (and R33GTS-T transmissions are hard to find) -maintenance parts are not easy to find or fast to get here in Canada -the used engines I could afford all have some substantial mileage and unknown maintenance history so I don’t know how far away is the next expensive rebuild. -now that I’ve seen some dyno sheets I think it would lack the midrange response I want for a daily driven car (at least when modified). VQ35DE Pros: -price is cheaper -nearly no mileage on the engine -stock parts are available at any local nissan dealer -N/A engine has a great response(especially in a lighter car than a 350z) and good torque range. -I don’t have to buy or fabricate intercooler and associated piping -weight saving is not negligible compared to a RB (maybe 200pounds ?? just a guess) and weight distribution should be better too. Cons: -unknown exhaust note and volume with a custom exhaust(I want a quiet car on the highway) -makes less power in stock trim(but still enough to reach my initial goal for this project which is to be equal to a bmw M3) -has less power potential even with upgrades (turbo or sc kits) -I can’t find info on the swap as not enough people have done it so I don’t know if it’s an easy fit to get the shifter in the right place, the oil pan not to hit the front crossmember…etc Do you think I am missing something? Doesn’t anybody have a link to some fit info for this swap? (or any other info for that matter !) Thanks guys !