rb20dett?

Post by **240sx_rb20det** » Mon Jul 13, 2009 5:45 pm

Is there a way to put two turbos in a rb20det engine? I never saw a rb20dett so I thought I would be the first and I was making sure its possible

Thnxs for ur replies

Post by **Carl H** » Mon Jul 13, 2009 5:48 pm

has been done before but its diminishing gains really, you'll have so much lag on the setup that it wouldnt even be funny.best bet is to just stick with a big single that can move lots o air...less lag and more power overall.

Post by **sci2000tech** » Mon Jul 13, 2009 5:54 pm

What Carl said.

But just for kicks... this was like the 3rd thing to pop up on a google search of "rb20dett"

zerothread/326571

NOT worth the money/time, trust me

Post by **silviasgp06** » Mon Jul 13, 2009 6:08 pm

hey thats not just a twin set up, thats a compund or seqential or somthing set up on that RB20. Pretty cool!

Instead of asking on a complety different post, Ill ask here. Im sure everyone has seen those compound set ups the supra guys are lucky enough to save money for. I think I saw like 300whp at 3k rpm and like 700whp up top is awesome (dont know how drivable though) They seem like a "worth it" idea on an rb, but we dont see it much. can someone allude to why?

-my ideas on maybe why we dont. please feel free to add more or correct me.1. More $$$$ on our already money hungary motors2. the half a liter difference, may not yeild that kind of power curve?3. Fab work, while they have a kit..4. 300whp\wtq @3000rpms is rediculous in a 3000lb car, wouldnt matter cause it would be hard to keep traction to use that power anyway.

Post by **240sx_rb20det** » Mon Jul 13, 2009 6:16 pm

Sorry but im new to this when u say lag do u mean it takes longer for the turbos to spool

Post by **sci2000tech** » Mon Jul 13, 2009 6:46 pm

silviasgp06 wrote:hey thats not just a twin set up, thats a compund or seqential or somthing set up on that RB20. Pretty cool!

It's not a compound or sequential setup, just two different sized turbo's mocked up on a twin turbo manifold. More of a lawn ornament now.

Quote »

Instead of asking on a complety different post, Ill ask here. Im sure everyone has seen those compound set ups the supra guys are lucky enough to save money for. I think I saw like 300whp at 3k rpm and like 700whp up top is awesome (dont know how drivable though) They seem like a "worth it" idea on an rb, but we dont see it much. can someone allude to why?

-my ideas on maybe why we dont. please feel free to add more or correct me.1. More $$$$ on our already money hungary motors2. the half a liter difference, may not yeild that kind of power curve?3. Fab work, while they have a kit..4. 300whp\wtq @3000rpms is rediculous in a 3000lb car, wouldnt matter cause it would be hard to keep traction to use that power anyway.[/quote]It would be very expensive to properly set up and tune a compound setup. It also adds quite a few more variables that can go wrong. I think most people feel the cost outweighs the gains.

By the time you get it all together and working properly, It could probably have been way cheaper to just buy/build an engine with a compound setup and swap it in.

I think it was Ben Franklin that said "Keep things as simple as possible, but no simpler."

Post by **sci2000tech** » Mon Jul 13, 2009 6:51 pm

240sx_rb20det wrote:Sorry but im new to this when u say lag do u mean it takes longer for the turbos to spool

Yup.

In the setup's I've seen actually run, the turbo's didn't see full boost till a bit after 5000RPM. It completely killed the low end power.

Post by **240sx_rb20det** » Mon Jul 13, 2009 8:05 pm

Isn't that what your suppose to want though or you want it from the start of the acceleration I always thought the tt would give you more power

Post by **Carl H** » Tue Jul 14, 2009 2:13 am

twins dont automatically give more power, normally they are used for response.a properly sized single can deliver more power and spool just a hair later than an old worn twins setup.

Post by **HxC_Nismo** » Tue Jul 14, 2009 4:24 am

if your interested rawbrokerage has an r33 rb26 stock twin turbo setup for salehttp://shop.rawbrokerage.com/p...d=292

Post by **240sx_rb20det** » Tue Jul 14, 2009 7:50 am

Alright thank you for your tips I think I'm gonna go with a single gt2530 turbo that was gonna be a waste of money I'll probably hav another question later be prepared to answer those

Post by **Carl H** » Tue Jul 14, 2009 8:34 am

gt2530 powered rb20 = amazing!i tuned one and the response and power was phenominal.makes me want to downgrade the 30r...if only there were smaller exh housings for it.

Post by **240sx_rb20det** » Tue Jul 14, 2009 8:58 am

You just made up my mind for the turbo part I heard it was good but not "amazing" how much hp will I see with the turbo upgrade(gt2530) 770cc injectors larger intercooler @ 10psi

Post by **Vkoslak** » Tue Jul 14, 2009 4:49 pm

770cc injectors are overkill for that turbo.

I was running rx7 550cc (benched at 609cc) and had plenty left over.

At 17.5 psi I was making 309hp at the rear wheels, and that was on a headgasket that had a leak between two cylinders. Granted I had the tomei 256 poncams.

I may be selling the turbo and cams soon. I'm putting in a rb26 where the 20 is now because the 20 no longer runs.

Post by **240sx_rb20det** » Tue Jul 14, 2009 6:46 pm

So the rx7 550 injectors are good enough thank you guys again

Post by **Carl H** » Wed Jul 15, 2009 2:52 am

just make sure you have them cleaned and tested before you fit them AND make sure they're all the same impedence.if they end up being low impedence you'll need to use a resistor pack.

Post by **240sx_rb20det** » Wed Jul 15, 2009 8:18 am

Sorry but I have no clue what impedence is. On the injectors?I have another questionI've been doing some research on the turbos and I've found out about 2 other turbos (3 total including gt2530) gt3076r makes 500whp, gt35r makes 400whp, and gt2530 325whp and I'm wondering which one is better(for a rb20det)

Post by **placham** » Wed Jul 15, 2009 8:31 am

Here you go, http://cgi.ebay.com/ebaymotors...ories

buy this off of egay, so I dont see this no more. And no you wouldn't be the first one. Looks like someone beat you to the punch.

Rb26dett HKS twin mani chopped of flanges for Cyl# 3 , 5, and rewelded to suit/fit Rb20/Rb25 heads with twin T25's.

This is probably the best deign I have seen for the Rb20/25dett attempt.

But like said above probably just waste of time and money. But with that HKS mani you could probably get something out of it. Wonder how it would do on Rb20, after all its not Chines its from the main land. Imagine running twin HKS GT2530's on RB20/25 or some smaller turbo. Dont know if rb20 would have enough steam from 3 cyl to run Gt2530 but rb25 might.

Greddy Rb26 clear cover, a discontinued item , how is the fit on Rb20 of it?
Modified by placham at 1:41 PM 7/15/2009

Post by **Carl H** » Wed Jul 15, 2009 9:27 am

what are you going to use the car for?I run a 3076r and its a laggy turbo especially on a stock block 20 without cams...laggy enough with.

Post by **240sx_rb20det** » Wed Jul 15, 2009 10:11 am

Race car/street car I want it to be fast though like around 450hp or close to 500 or maybe that's too far

Post by **Vkoslak** » Wed Jul 15, 2009 2:57 pm

You should drive or ride in a 300rwhp 240sx, and then decide whether that isn't fast.

Maybe you should clarify what kind of racing as well.

To get those kind of numbers on a rb20 requires a whole mess of work and there will be much turbo lag.

If the hp number is the only thing important to you, it would be better to start with a rb25.

Post by **Carl H** » Wed Jul 15, 2009 4:58 pm

lol, above 400whp the game becomes see how long you can keep it in a straight line...for a big track/highway the 30r is great, other than that it kinda sucks to be honest.pain in the a** to keep the car in boost trying to drift.

Post by **DrifterProdigy85** » Wed Jul 15, 2009 5:16 pm

300whp doesnt do much of anything for me anymore. If i cant spin the tires at will, it just isnt fun. Thats why i have a 67mm on my SR. Lags a bit but hits like a F'in train Personally i like a little lag. Keeps the stupidity in check for daily driving. If i had a Turbo LS1 or something id be in too much trouble with all that instant tq.

Post by **240sx_rb20det** » Wed Jul 15, 2009 5:29 pm

Oh im into drag right now maybe drift later rb20det is what I like even though its weak im not going for just hp but tq also I want it to be fast but not too fast that I can't drive it daily anymore(until I get another car)

Post by **sci2000tech** » Wed Jul 15, 2009 6:06 pm

placham wrote: Greddy Rb26 clear cover, a discontinued item , how is the fit on Rb20 of it?Modified by placham at 1:41 PM 7/15/2009

Wow, I had no idea they were discontinued

The fit is ghetto at best with the RB20 back plate. If you were to source a 26 back plate, it would probably fit perfect. IIRC, only the top 2 bolts lined up with the rb20 back plate, not to mention the shape is different.

I'll try and throw it on to get some pics tomorrow.

Post by **dsrturbo.com** » Sat Jul 18, 2009 1:50 pm

I tryed dumby fitting up a rb20dett to using 275 cams and springs however.. I'd stick with a single turbo unless its a gtr nd comes out with it standard!!

http://www.driftsideracing.com...0DETT

Post by **Joe** » Sat Jul 18, 2009 2:13 pm

dsrturbo.com wrote:I tryed dumby fitting up a rb20dett to using 275 cams and springs however.. I'd stick with a single turbo unless its a gtr nd comes out with it standard!!

http://www.driftsideracing.com...0DETT

ok man ive let you slide for a while

if you want to keep plugging your business you need to become an advertiser

please contact [email protected]

Post by **dsrturbo.com** » Sat Jul 18, 2009 10:21 pm

Greg your in america? im in nz... search alibaba if you want to see dsr. as for these forums move on. Thats all they are.Forums. ppl wana know about twin turbo i told them its a bad idea. pictures are shown.

Post by **datsunmotorsports** » Sun Jul 19, 2009 3:27 am

and another more complete

http://forums.hybridz.org/showthread.php?t=144651and half way down this threadhttp://forums.nicoclub.com/zer...ge=19respectively

rb20dett?

rb20dett?

Re: (Carl H)

Re: (sci2000tech)

Re: (Carl H)

Re: (silviasgp06)

Re: (240sx_rb20det)

Re: (sci2000tech)

Re: (Carl H)

Re: (HxC_Nismo)

Re: (Carl H)

Re: (Vkoslak)

Re: (Carl H)

Re: (240sx_rb20det)

Re: (Carl H)

Re: (DrifterProdigy85)

Re: (placham)

Re: (sci2000tech)

Re: (dsrturbo.com)

Re: (Joe)

Re: rb20dett? (240sx_rb20det)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums