Hi there guys. New to the forum, Im from New Zealand. Looks like a great great database of RB info Heres a bit of history on my project and a current update of where im at right now..
First off, this is a pic of the virgin S14 Qs (Non turbo-SR20DE) as i saw it on the auction sheet in Japan. I could see in the pic that it had a front lip, skirts and some 17s. I got a nice surprice when the car arrived though, it was equipped with a set of Tein Type Ha coilover suspension and 5Zigen full 2 1/2inch exhaust.
I bought this when I was 18, it was fun at the time but the eventual need for more power led to an RB20DET re-power. I sourced a good deal on an RB20DET motor and gearbox package. But as luck would have it, the gearbox turned out to be in need of a rebuild. It was drivable, but 2nd gear was hard to engage. The clutch also blew after the first 3rd gear burnout. It was replaced with an Exedy 5puk. The string of bad luck eventuated to a run big end bearing on the engine. Here are some pics of the RB20DET and some other external modifactions that i did-
Modified by DRFT 14 at 4:02 PM 1/26/2006
Self Introduction an Pics of My RB S14 Project
The string of bad luck with the old motor led me to start looking for a much newer driveline. In the meantime, i started buying parts for the new engine. I already had a front mount intercooler, Walbro fuel pump, exhaust, HKS filter etc fitted on the car from the RB20 setup. I added to this a Masterpower T3/T4 (500hp spec), 38mm WG and SSQL Blow Off valve-
After alot of searching, i found an R34 RB25DET motor which was very reasonably priced. I went to pick up the motor and found that the seller also had an R33 RB25DET gearbox. So I made a deal on the lot and took my new babies home .
I 'dummy fitted' the turbo on the stock manifold but found two problems. 1. The compresser housing was not clearing the manifold. 2. It was obviously going to be difficult to mount the Wastegate on the stick manifold. So I scratched the idea and decided to get a custom top-mount manifold fabricated to suit my setup.
With the water lines blocked and oil feed and return lines for the new turbo sorted, a proceeded to get the new motor dropped into the Silvia. I used the same 5puk Exedy clutch I used for the RB20 (it was only one month old).
After alot of searching, i found an R34 RB25DET motor which was very reasonably priced. I went to pick up the motor and found that the seller also had an R33 RB25DET gearbox. So I made a deal on the lot and took my new babies home .
I 'dummy fitted' the turbo on the stock manifold but found two problems. 1. The compresser housing was not clearing the manifold. 2. It was obviously going to be difficult to mount the Wastegate on the stick manifold. So I scratched the idea and decided to get a custom top-mount manifold fabricated to suit my setup.
With the water lines blocked and oil feed and return lines for the new turbo sorted, a proceeded to get the new motor dropped into the Silvia. I used the same 5puk Exedy clutch I used for the RB20 (it was only one month old).
We decided to drop the motor and gearbox in together. This wasnt the easiest of jobs for two people. The RB25 gear is very large and not usually at home in a Silvia. So it took a few tries and re-adjustments of the chain on the engine hoist to get the right angle. I had to stand on the gearbox in order to have it low enough to slide under the firewall and into the GB tunnel
This is when we had to stop, as an engine mount problem that i never thought was an issue stopped us from going any further. The NEO engine mounts will not bolt into the S14. We had to call it a day with the motor just sitting in the car and the gearbox lying on the floor under the car :huh: .
I sourced some RB20 engine mounts and they were replaced. The motor bolted in perfectly. However, the gearbox crossmember does not bolt up like the RB20 box does. The RB25 box is longer, so only 2 bolts line up. We bolted up the two, ans I will have to sort this issue out later.
This is when we had to stop, as an engine mount problem that i never thought was an issue stopped us from going any further. The NEO engine mounts will not bolt into the S14. We had to call it a day with the motor just sitting in the car and the gearbox lying on the floor under the car :huh: .
I sourced some RB20 engine mounts and they were replaced. The motor bolted in perfectly. However, the gearbox crossmember does not bolt up like the RB20 box does. The RB25 box is longer, so only 2 bolts line up. We bolted up the two, ans I will have to sort this issue out later.
At this stage, my manifold fabricater has taken the gasket back to his workshop and has started fabricateing a top mount manifold for me. He will also complete the installation of the turbo, modify the standard plenum to face forward, fit the wastegate, exhaust etc. This will hopefully be completed within the next couple of weeks.
I now have a very important question for some of the more knowledgable RB heads out there-
Is it possible to modify the NEO RB25DET's Continual Variable Valve Timing to a Switchable Variable Valve Timing like the R33 RB25DET? The reason I ask this is because it is nearly impossible to find an aftermarket ECU that supports the NEO. I also have a LinkPlus ECU here which id like to use. It however cannot control the VVT (much like most other ECU's on the market). I dont have the stock ECU and the wiring harness is cut. So the LinkPlus wire-in unit i have is optimum. Can anyone answer my quiestion?
I now have a very important question for some of the more knowledgable RB heads out there-
Is it possible to modify the NEO RB25DET's Continual Variable Valve Timing to a Switchable Variable Valve Timing like the R33 RB25DET? The reason I ask this is because it is nearly impossible to find an aftermarket ECU that supports the NEO. I also have a LinkPlus ECU here which id like to use. It however cannot control the VVT (much like most other ECU's on the market). I dont have the stock ECU and the wiring harness is cut. So the LinkPlus wire-in unit i have is optimum. Can anyone answer my quiestion?
Re: (DRFT 14)
wow man nice setup. I'm about to go with the master power 810007 T04 so nice to see someone else with one. Keep us posted on both Manifolds, I love to see pics!
-
Kansei240sx
- Posts: 1356
- Joined: Mon Nov 01, 2004 10:17 am
- Car: S13 - RB25 Circuit car
71 240z - street/track day car
AE86 - Daily Drizzle/track day car
Z31t - Paper weight/street car - Contact:
Re: (300Plus)
I love the body style and mods you've got going! Keep up the good work! Only thing i'd advise just becuase im a whore about it, is... cleaning up the motor before it goes in. And dismantle it down to the long block and replace everything from the oil pan up, or at least clean it out. Its a little to late for that now, but next time theres a heads up.
As far as your Valve timing question goes, im not 100 percent sure. I know the RB25DET's have it on the INTAKE side only, but as far as the Neo's go, its something completely different.
As far as your Valve timing question goes, im not 100 percent sure. I know the RB25DET's have it on the INTAKE side only, but as far as the Neo's go, its something completely different.
Um, with the RB20? Cause i can try to push my car over the finish line as it is now and tell you, haha. But I actually only managed a 14.2 the only time I took it to the strip with the RB20. Wheel spin through 1st and second is probably the reason for that though. I raced a friend with an SR20 S14 and beat him twice. He later went on to run a 13.7, so there was better ET potential in that setup but it doesnt matter now. I want low 12s out of the new setup, but will happy just to break into the 12s
Time for an update. Progress is a little slow but definately being made. I just came back from my mechanic's house where I took a few pics. We decided to relocate the throttle body to the front of the plenum and in the process totally ditched the traction control. The FPR had to be relocated but the throttle cable was a perfect leangth so no mods were needed in that respect. Im pretty happy with the plenum, it looks exactly like a 6cyl version of the SR20DET plenum IMO. Yes there are open questions in regards to air flow etc, but this will suit me fine as far as my budget is concerned. The manifold is pretty close to being tuned leangth (give or take an inch). Hopefully this setup will produce the results. My ultimate aim is 280rwkw. The turbo might not flow that and neither will the injectors, I have however spoken to many RB25 owners who have netted 250rwkw+ on the standard injectors so il be happy with 250rwkw.
I know the engine is filthy but im going to give it a good tidy up and paint the rocker covers once everything else is sorted.
I know the engine is filthy but im going to give it a good tidy up and paint the rocker covers once everything else is sorted.
Re: (StricNyne)
Very nice man! You are the only other Master Power turbo guy I've seen pics from. keep us posted brotha
-
240SX GT-S
- Posts: 69
- Joined: Mon Nov 28, 2005 4:19 pm
- Car: 1995 240SX SE
Intake Plenum
Did you have a shop do that conversion for you? I've been thinking about doing that, but I didn't know if it was possible just to cut the tb off and put it on the front.
Re: Intake Plenum (240SX GT-S)
I took it to a mechanic/fabricter that did it at his house. He infact fabricated the top mount manifold and the IC piping. Did an excellent job. Its very possible to re-position the TB. He only charged me $150NZ do it, which is just under $100US! (Just the plenum intself). So look for a good fabricater and bargain, it isnt an expensive mod.240SX GT-S wrote:Did you have a shop do that conversion for you? I've been thinking about doing that, but I didn't know if it was possible just to cut the tb off and put it on the front.
-
240SX GT-S
- Posts: 69
- Joined: Mon Nov 28, 2005 4:19 pm
- Car: 1995 240SX SE
Re: Intake Plenum (DRFT 14)
So said before that there are some "open questions in regards to airflow" and things like that. have you experienced any problems with this setup? Or is it not on the road yet?