more rb25 questions..
more rb25 questions..
i am new to the boards and am contemplating purchaing a 240(s14) to another project car. I was pretty set on the sr swap but i wouldn't mind going with the rb25det. I just have a few quick questions and believe me i've read through most of the rb threads:1. Does the s14 also have hood clearence issues with the rb swaps? Are there any other concerns with the newer chassis?2. What is the expected power output of the rb with 3" turbo back, intake and fmic @14psi(seems to be the consensus on the limit of the stock turbos efficiency)?3. How much more would i end up paying a shop JUST IN LABOR for the rb swap over the sr swap (wired up and ready to go)?4. Finally, what is a good place to browse for comprehensive mods and modding info? Are there any upgrade paths listed anywhere?5. Do people just tune for bigger injectors with an afc or is there a company (similar to JWT) that can reprogram the ecu and maf?Thank you for any info you can give me, it is very appreciated!
Glad to see you guys are being so helpful! I've stiil been trying to find my answers and have been unsuccessful. i looked around skylines down under and peeps were basically talking rwkw, and wondering if they could get their gtst's into the 12s. I've checked the greddy and hks websites looking for mods and have been unsuccessful. Guess i can search the hole web but i was hoping someone has and would be willing to help me out. Guess not 
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Siddhartha
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- Joined: Fri Aug 02, 2002 6:56 am
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I would help, but I don't know much about these wonderful, amazing, stupendous, magnificent engines. I heard from Night that an rb25det in an s13 with custom downpipe and new plugs will run a mid-12. Remember, the s13/s14 chassis is much lighter than a skyline GT-R chassis.
A shop is more than likely gonna rape you on the cost to install as soon as they hear the word "Skyline". Sr20s are pretty much common now (at least in Orlando they are, I've seen 4 and I've been here less than a year). Most shops here stock sr20s and sr20 parts, and some even have deals where they will do mods and an install for less than the price of an rb25det before shipping.
There isn't much for modding the rb25det in a 240. Actually, I haven't found much for modding them at all. Looks like you're going to have to get out into the world and interact with people that have done it before or that know what they're doing.
EDIT: When I say there isn't much for modding rb25dets I mean that there aren't many websites. There is TONS that you can do to mod. Turn up boost to 14 on stock turbo, new fuel pump (and injectors if you wanna be REALLY safe), DP and exhaust, lighten car of excess weight, new tires (remember, putting power to the ground is as important as making it), new running gear (wheels, susp), etc. Theres lots of stuff you can do w/o breaking the bank or opening engine.
Not trying to come off as an *******, just trying to help ya out. I have some of the same questions.
Take it easy.
A shop is more than likely gonna rape you on the cost to install as soon as they hear the word "Skyline". Sr20s are pretty much common now (at least in Orlando they are, I've seen 4 and I've been here less than a year). Most shops here stock sr20s and sr20 parts, and some even have deals where they will do mods and an install for less than the price of an rb25det before shipping.
There isn't much for modding the rb25det in a 240. Actually, I haven't found much for modding them at all. Looks like you're going to have to get out into the world and interact with people that have done it before or that know what they're doing.
EDIT: When I say there isn't much for modding rb25dets I mean that there aren't many websites. There is TONS that you can do to mod. Turn up boost to 14 on stock turbo, new fuel pump (and injectors if you wanna be REALLY safe), DP and exhaust, lighten car of excess weight, new tires (remember, putting power to the ground is as important as making it), new running gear (wheels, susp), etc. Theres lots of stuff you can do w/o breaking the bank or opening engine.
Not trying to come off as an *******, just trying to help ya out. I have some of the same questions.
Take it easy.
Thank you for replying! I was searching through the web last night and found some european sites that sell parts for the r33 gtst. They had all the hks turbo upgrades to the 2835 and then they had "kits" for the car. I'm trying to find a good sized turbo that will bolt directly on without having to spend $$$ on the kits. It's starting to like like i could do the sr with a lot of mods for the price but i'll keep truckin!
http://www.takakaira.comPretty much the only site you'll need for rb25det upgrades 
Nobody knows the answers to some of the questions...since nobody has done it.
1) We will be doing an RB25DET into an S14 soon. It will probably have hood clearance problems if you try and use the stock crossmember, but I don't know for sure. With custom mounts, you can make it fit any way you like.
2) Should be around 250-280rwhp, but once again, not enough RB25s in the states to tell for sure.
3) It depends on what all the shop does. With our installs, we build a custom intake manifold to better fit a FMIC, build custom mounts, clean and paint the engine, clean the engine bay, and take a lot of care in our wiring, so our shop may be higher priced than others. Not many shops have done it before...so you might want to find a shop that has experience with it (so you aren't the guinea pig). Labor of just a direct swap isn't that much more...it is a little bit more involved, though.
4) Same mods as any turbo engine...upgrade the turbo and fuel system (bigger turbo, maybe manifold, FMIC, injectors, etc). That is the quickest/easiest/cheapest path to more power. Cams and cam gears can be had, too...but there really isn't a stagewise list of things to do, since there aren't a lot of RBs in the states.
5) JWT may be able to reprogram the ECU. We have sources in Australia that can also do it. If it was me, I'd just add bigger injectors and tune with an AFC (for a street car).
Dennis KalmanunStable Hybrids
1) We will be doing an RB25DET into an S14 soon. It will probably have hood clearance problems if you try and use the stock crossmember, but I don't know for sure. With custom mounts, you can make it fit any way you like.
2) Should be around 250-280rwhp, but once again, not enough RB25s in the states to tell for sure.
3) It depends on what all the shop does. With our installs, we build a custom intake manifold to better fit a FMIC, build custom mounts, clean and paint the engine, clean the engine bay, and take a lot of care in our wiring, so our shop may be higher priced than others. Not many shops have done it before...so you might want to find a shop that has experience with it (so you aren't the guinea pig). Labor of just a direct swap isn't that much more...it is a little bit more involved, though.
4) Same mods as any turbo engine...upgrade the turbo and fuel system (bigger turbo, maybe manifold, FMIC, injectors, etc). That is the quickest/easiest/cheapest path to more power. Cams and cam gears can be had, too...but there really isn't a stagewise list of things to do, since there aren't a lot of RBs in the states.
5) JWT may be able to reprogram the ECU. We have sources in Australia that can also do it. If it was me, I'd just add bigger injectors and tune with an AFC (for a street car).
Dennis KalmanunStable Hybrids
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Siddhartha
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- Joined: Fri Aug 02, 2002 6:56 am
- Car: cars computers women martial arts
That's awesome! Thanks for all the great info! I am currently doing the research and cost benefit analysis. I am now trying to do some research on the strength of the stock motor. I heard the pistons are a weak point not only due to comp. ratio but also something about the ring lands? My proposed set-up is full exhaust, fmic, intake mani, injectors(still looking for the correct size?) and either a 2835 or 3037 @14-18psi-pump gas street driven. I know the compression ratio is 9:1 but my motor stock is 8.5:1 and when they get built most people go with J.E. 9:1(4g63). I am wondering if the motor will handle this kind of power if it is tuned properly with a LINK system or power fc. Would it be better just to build it up before hand since the motor is already out? What do you guys think?
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rbsileighty
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- Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT
Ok, i would like to know why you CANT tune it with an afc??
All you're doing is changing the freaking air flow meter signal, and fooling the ecu into thinking less / more air is getting in.
I work at a dyno shop, don't tell me i can't tune the freaking ecu. if i can do a z32 ecu i can do an rb26 ecu.
All you're doing is changing the freaking air flow meter signal, and fooling the ecu into thinking less / more air is getting in.
I work at a dyno shop, don't tell me i can't tune the freaking ecu. if i can do a z32 ecu i can do an rb26 ecu.
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FAST-DATSUN
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If you have question on the RB to 240sx contack us off line at http://www.mckinneymotorsports.com or see January 2003 MODIFIED mag for the spread on our shop car.. MACK
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FAST-DATSUN
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I'm not looking for a fight nor am I getting into one.I,ve been in this business for 35 year and have 1000's of satisfied customer that keep coming back. PRICE is not the only factor in a job. Everyone has seen our shop cars and customers car in articles in MAG's and at show all over the west coast and some east coast shows, so they know what there getting for there $$$$$. The cost of running a business varies from place to place and effects the price of the work.
I wish you the best on your business. I will not get into a contest over prices, we let our work do the talking..
Mack Mckinney
I wish you the best on your business. I will not get into a contest over prices, we let our work do the talking..
Mack Mckinney
I couldn't have put it better, Mack. Price isn't the only thing...and I don't see why people complain about the prices of installs from some companies. If you don't want to pay it, then don't. If you want to charge less than a competitor, go ahead.
What I think is funny is that people are always on the message boards complaining about prices of installs...for the guys who do quality work and build custom stuff. You never see them complaining about the guys just selling parts...the guys who make $50 off of an exhaust that they see for 2 minutes. I'm beginning to think I am in the wrong game.
Dennis KalmanunStable Hybrids
What I think is funny is that people are always on the message boards complaining about prices of installs...for the guys who do quality work and build custom stuff. You never see them complaining about the guys just selling parts...the guys who make $50 off of an exhaust that they see for 2 minutes. I'm beginning to think I am in the wrong game.
Dennis KalmanunStable Hybrids
http://www.mckinneymotorsports.com I visited the shop which is located in San Diego/ Santee area. The owner's son is hella cool, knows his ish. He does all kinds of conversions/swaps. I bought my sylvia front end there. He has a special going on through April 15. RB swap into a S13 for $7,000 Drive in, drive out. Looks like quality work too!
rudee023 wrote:http://www.mckinneymotorsports.com I visited the shop which is located in San Diego/ Santee area. The owner's son is hella cool, knows his ish. He does all kinds of conversions/swaps. I bought my sylvia front end there. He has a special going on through April 15. RB swap into a S13 for $7,000 Drive in, drive out. Looks like quality work too!
does that include all the part, i.e engine?