Has anyone ever attempted to swap a Rb25DETT into a Q45? I was thinking about it, and that would be an awesome engine for the Q.
Does anyone have any idea how easy or hard it would be to do this swap? And would it be worth the trouble?
Would it be easier to turbo/supercharge the VH45de, then to do the swap?
Any idea how much it would cost?
Rb25DETT swap into 92 Q45
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PoorManQ45
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I don't know if I agree on either of those counts. An inline 6 TT is inherently less robust than a V-8 of the same power as far as longevity goes. I don't know RB statistics, but there are quite a few members here with 200k+ on their Qs. As for parts, you can order parts for a VH from any Infiniti dealer in the country. The RB25 was only used in the Skyline and Cefiro AFAIK.
PoorManQ45 wrote:isn't the RB25DETT a more dependable motor than the VH45DE? If so, in the long run it would be cheaper to maintain the Rb, right. And, parts can be found a little easier for the Rb than te VH. Has anybody ever tried a swap like this before? How much would a Rb25DETT cost me?
There are 4 RB25DET's on ebay right now with Buy It Now's that vary from $2450 to $3000, not including shipping.
There is 1 RB26DETT on ebay right now with a Buy It Now of $5850, including shipping.
All "appear" to include a tranny and some harness, but for that $$ you could SuperCharge your Q and not have the wiring/ECU nightmares. of course in the end, it's your decision.
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PoorManQ45
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When I said parts, I meant performance parts. I know I can get OEM parts for the Q easily, but I want more performance. DAEDALUS: your right about the V8 lasting longer than an I6 of the same HP, but i'm think of shooting for between 450-600 from the engine. Even with a supercharger, this can't be done vary easiy with the VH45DE, can it? Besides that, nobody even makes a turbo or supercharger kit for the Q. Meaning I would have to do the fabrication myself, and this could get pretty expensive.
No, not much aftermarket support for the VH. But the B.A.D. Q supposedly made 380 WHP, which backs out to nearly 500HP crank. I think that was without the nitrous, but I'm not certain. You might want to email AZhitman to get more details, and definitely check out the supercharger threads in Infiniti General.
i had my heart set on an rb26dett swap into a J30.
after months of planning out a setup, ive come to the conclusion that a VH is a much better route.
the price of a stock rb26 motor is roughly equvalent to the cost of a VH45 and custom pistons and rods. [must add $$ if you cant build a motor]
comparing a 6 to an 8 of similar power, the 8 will have lower stress per cylinder, which adds to its longevity. on top of that, with two properly matched turbos on the VH [twin GT28RS] you will have much more low end torque to help with normal driving.
ive been thinking about this for almost a year now, and the VH is a better choice. i think people are turned off by the fact that not too many people have heavily modded these motors.
personally, i think with the right turbos, dual 3" exhaust, JWT ECU with an Emanage and profec E-01, pistons, rods, oil squirters, strategic ceramic and moly coatings [pistons, heads, bearings], that this motor could more than tolerate bursts of 600 WHP.
if you keep the normal street trim to the 350-400 WHP level, the motor would last for quite some time.
after months of planning out a setup, ive come to the conclusion that a VH is a much better route.
the price of a stock rb26 motor is roughly equvalent to the cost of a VH45 and custom pistons and rods. [must add $$ if you cant build a motor]
comparing a 6 to an 8 of similar power, the 8 will have lower stress per cylinder, which adds to its longevity. on top of that, with two properly matched turbos on the VH [twin GT28RS] you will have much more low end torque to help with normal driving.
ive been thinking about this for almost a year now, and the VH is a better choice. i think people are turned off by the fact that not too many people have heavily modded these motors.
personally, i think with the right turbos, dual 3" exhaust, JWT ECU with an Emanage and profec E-01, pistons, rods, oil squirters, strategic ceramic and moly coatings [pistons, heads, bearings], that this motor could more than tolerate bursts of 600 WHP.
if you keep the normal street trim to the 350-400 WHP level, the motor would last for quite some time.
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PoorManQ45
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PoorManQ45
- Posts: 16681
- Joined: Fri Jul 02, 2004 5:13 pm
well, i wouldnt be using a stock TT flywheel.
the price is subjective, i can do all of it myself.
i have no idea how much a shop would charge to convert the Q to manual.
parts/work needed-the auto would need to be removed.
you need to aquire an adapter plate for the trans to bolt up. you need a flywheel spacer to put the fly back in alaignment with the trans. you need a manual brake pedal, a clutch pedal bracket, the pedal, clutch master cylinder, the line needs to be run for the clutch hydraulics.
you need to cut a hole in the car under the center console for the shifter to come up. you need to modify the center console for the shifter, and you need to make a shift boot.
the price is subjective, i can do all of it myself.
i have no idea how much a shop would charge to convert the Q to manual.
parts/work needed-the auto would need to be removed.
you need to aquire an adapter plate for the trans to bolt up. you need a flywheel spacer to put the fly back in alaignment with the trans. you need a manual brake pedal, a clutch pedal bracket, the pedal, clutch master cylinder, the line needs to be run for the clutch hydraulics.
you need to cut a hole in the car under the center console for the shifter to come up. you need to modify the center console for the shifter, and you need to make a shift boot.
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PoorManQ45
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#1- no#2- driveshaft will need to be modified most likely.
but back to the subject. the RB is not going to be easy.
its gonna need custom motor mounts, tranny mounts [probably], wiring, plumbing, a custom exhaust system, ect ect..
expect to pay around $10,000-$13,000 for parts and labor when its all said and done.
this requires massive fabrication, and is in no way shape or form a "bolt-in" procedure.
but back to the subject. the RB is not going to be easy.
its gonna need custom motor mounts, tranny mounts [probably], wiring, plumbing, a custom exhaust system, ect ect..
expect to pay around $10,000-$13,000 for parts and labor when its all said and done.
this requires massive fabrication, and is in no way shape or form a "bolt-in" procedure.
Cant be too hard. Someone can make you custom mounts, and a custom driveshaft and not to mention exhaust. Wire up the harness to the ecu and itll fire right up. Then find a way to get the gauge cluster to work and you're rollin. Anything can be done with the right amount of money. And I also think this would bea good idea.
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