Rb20 Questions and Help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

BeloRB20 · 12-06-2017, 10:52 PM

Hey guys I’m in the process of building a rb20 for my s13 and I’ve got a few things piled up already, I just need help with on what else I would need to get to complete it. Thanks advance! The power output I was hoping to get is between 350 to 450 whp. And if I can make more with what I have so far that would be great. What trans would be best to go with? Which turbo? Which Big brake setup? Rear end? And to lay that power to the ground I have 18x10.5 for the rear and 18x9.5 in the front wheels. This is a car that I will hopefully complete for street use once in a while not as much a daily. And I will be sending the block and head to a machine shop to have that all re done.
Parts I have...
-T4 Top mount manifold (unknown brand)
-Tomei Exhaust
-Haltech Ecu
-Cp forged pistons 80mm 8.5:1 ratio
-Spool H beam connecting rods
-ACL +0.025mm Race bearings
-Nitto Extended Crank Collar
-N1 Oil Pump
-Tomei Exhaust and Intake cam gears
-Kelford 272/278 cams with 10mm lift
-SuperTech Valve spring set
-SuperTech +1mm intake and exhaust valves
-Aeromotive FPR
-Arp headstud and main studs
-z32 fuel filter
-Idx 1050cc injectors
-Garret Boost gauge
-Walbro 400lph fuel pump(e85)
-Mishimoto Oil cooler
-Cx racing fmic

JIMB0 · 12-07-2017, 07:30 AM

sell it all and get a RB25

Yellow4g63 · 12-07-2017, 10:35 AM

If u get a 61mm or bigger turbo you might have lag like I did. The sweet spot on my yestertech precision SC61 was about 5500. That's when things got real, I only reved out to 8000 rpm on mine. I had tomei 270 pon cams. Peak power was at 8000 so I could have reved it out a little more.https://flic.kr/p/Vf7c6b.

Malik · 12-08-2017, 01:50 AM

^ sounds like the right move. I cant recommend any turbos offhand but:
you'll need to calculate your engines airflow, and then compare that to a couple compressor maps to see what turbos will work for you.

BeloRB20 · 12-09-2017, 02:52 PM

Quote:

Originally Posted by Yellow4g63

If u get a 61mm or bigger turbo you might have lag like I did. The sweet spot on my yestertech precision SC61 was about 5500. That's when things got real, I only reved out to 8000 rpm on mine. I had tomei 270 pon cams. Peak power was at 8000 so I could have reved it out a little more.https://flic.kr/p/Vf7c6b.

Thanks for the info man, I’ll check it out. If I were to get a smaller turbo to spool quicker would that sacrifice the power put out? Or does it all still depend on a certain turbo?

Yellow4g63 · 12-09-2017, 07:48 PM

Quote:

Originally Posted by BeloRB20

Thanks for the info man, I’ll check it out. If I were to get a smaller turbo to spool quicker would that sacrifice the power put out? Or does it all still depend on a certain turbo?

Probably not the newer turbo's out now would do the job better. Cost more lol but they can do the job better than what I was working with.

smoked240 · 12-09-2017, 10:01 PM

Quote:

Originally Posted by JIMB0

sell it all and get a RB25

My exact thoughts.

12-06-2017, 10:52 PM	#1
BeloRB20 Join Date: Dec 2017 Location: California Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	Rb20 Questions and Help Hey guys I’m in the process of building a rb20 for my s13 and I’ve got a few things piled up already, I just need help with on what else I would need to get to complete it. Thanks advance! The power output I was hoping to get is between 350 to 450 whp. And if I can make more with what I have so far that would be great. What trans would be best to go with? Which turbo? Which Big brake setup? Rear end? And to lay that power to the ground I have 18x10.5 for the rear and 18x9.5 in the front wheels. This is a car that I will hopefully complete for street use once in a while not as much a daily. And I will be sending the block and head to a machine shop to have that all re done. Parts I have... -T4 Top mount manifold (unknown brand) -Tomei Exhaust -Haltech Ecu -Cp forged pistons 80mm 8.5:1 ratio -Spool H beam connecting rods -ACL +0.025mm Race bearings -Nitto Extended Crank Collar -N1 Oil Pump -Tomei Exhaust and Intake cam gears -Kelford 272/278 cams with 10mm lift -SuperTech Valve spring set -SuperTech +1mm intake and exhaust valves -Aeromotive FPR -Arp headstud and main studs -z32 fuel filter -Idx 1050cc injectors -Garret Boost gauge -Walbro 400lph fuel pump(e85) -Mishimoto Oil cooler -Cx racing fmic

12-07-2017, 07:30 AM	#2
JIMB0 Zilvia FREAK! Join Date: Jul 2011 Location: Texas Posts: 1,002 Trader Rating: (22) Feedback Score: 22 reviews	sell it all and get a RB25 __________________ @JYW0RLD

12-07-2017, 10:35 AM	#3
Yellow4g63 Zilvia FREAK! Join Date: Jan 2003 Location: Socal Posts: 1,454 Trader Rating: (5) Feedback Score: 5 reviews	If u get a 61mm or bigger turbo you might have lag like I did. The sweet spot on my yestertech precision SC61 was about 5500. That's when things got real, I only reved out to 8000 rpm on mine. I had tomei 270 pon cams. Peak power was at 8000 so I could have reved it out a little more.https://flic.kr/p/Vf7c6b. __________________ 95 240sx RB20 415whp 91 Nx2000 VVL yo

12-08-2017, 01:50 AM	#4
Malik Nissanaholic! Join Date: Jun 2013 Location: Queens, NY Posts: 1,796 Trader Rating: (0) Feedback Score: 0 reviews	^ sounds like the right move. I cant recommend any turbos offhand but: you'll need to calculate your engines airflow, and then compare that to a couple compressor maps to see what turbos will work for you.