zilvia_gt

I was just wondering why most RB engines prefer the Tomei Poncam (or have it installed) instead of the Greddy Easy Cams? Given their relatively close lift 9.1 vs. 9.15, wouldn't the Easy Cams provide more power since it has more duration? Both are drop in camshafts without additional valvetrain modifications and in most case, the Greddy's are cheaper. Could it be the camshaft (lobe) design itself or quality; that most people prefer the Tomei over Greddy? Easy Cam Available Spec: Option 1) IN 256-9.1 / EX 256-9.1 Option 2) IN 264-9.1 / EX 264-9.1 Tomei Poncam Type A: IN 260-9.15 / EX 252-9.15 Tomei Poncam Type B: IN 260-9.15 / EX 260/-9.15 On a side note: HKS also makes drop cams, their Step 1's in the following available specs: Intake: 1) 256 Duration 8.7mm Lift 2) 264 Duration 8.7mm Lift 3) 272 Duration 8.7mm Lift Exhaust: 1) 256 Duration 8.7mm Lift 2) 264 Duration 8.7mm Lift 3) 272 Duration 8.7mm Lift

I'm not sure about the rb, but when I did my swap with the sr into a s13. I had to swap the sr tranny speed sensor with the ka tranny speed sensor. Reason is the sr speed sensor was reading in KMH, so you need the ka speen sensor which reads in MPH to correct the speedometer reading. Could this account for why your speedometer was off? I'm sure that if you decide to run a digital sensor, you'll need a z32 to get correct speedometer reading. I'm not sure though because with aftermarket units, you can usually calibrate them.

If I recall correctly you're using a modified rb25 speed sensor that is cable driven right or are you using a z32 electric one?

I found this ohms calculator, but I'm not sure how to plug in your numbers. http://ourworld.compuserve.com/homepages/Bill_Bowden/ohmslaw.htm

Hate to bring up an old thread. But it seems like there really wasn't any closure on this topic. Is the 10ohm 10watt or 6ohm 6watt resistors that is needed? The last couple of posts seems to be leaning towards the 10's.

How about we add some part numbers for future reference?

Is this setup in your s30 or s14?

Thanks Bud, Thanks for clearing a lot of things up. I know that there's a lot of this information on the net and this is an old subject, but all the information I've found were conflicting with no solid answers. There's also another member who started a separate post after I did about using the n/a 300zx clutch: http://forums.hybridz.org/showthread.php?t=141802 The answer is yes. You can can us the n/a z32 with the rb26/rb25 tranny setup. It will bolt right up to the rb flywheels.

If I recall correctly, haven't you tried the z31t tranny with your rb in your s30 (read it somewhere in nico)? How does the z31t tranny shifter align up to the s30 shifter hole? On another thought. The z31t tranny seems to have taller gearing from gears 1-3 and a shorter fifth gear when compared to z32 and rb25 transmissions. I'm have no clue when it comes to gearing, but would this mean better acceleration (for dragging) in the first three gears, while having a higher top speed in fifth or do I have that reversed? I believe fourth gear on all the trannies are 1:1. Here are the gear ratios that I found for the FS5R30A, 1988-89 z31t transmission: 1st - 3.324 2nd - 2.077 3rd - 1.360 4th - 1.000 5th - 0.711 (info sourced from http://www.az-zbum.com/information.transmission.shtml)

Sure, but you didn't mention which clutch rb25, rb26, or n/a 300zx? It's easier said than it is to actually source some of these parts together. Here in the U.S., rb parts are not common and are quite expensive. I would like this post to be something that helps people who can't readily get "ready-to-go" swap parts that are already pieced together or for someone looking to replace a clutch or flywheel or any of the other parts. Also I've found that a lot of the info I came across on the internet is very vague as if people don't want to share their knowledge but just hints at it. No offense, but comments like "get a push clutch type" just brings up more questions. A comment such as "a push clutch type from a n/a Z32 or Rb25" would be more helpful. I started this post to clear up all the conflicting information floating around the net so I would like the answers to be specific here if possible.

First off, I've done my research... here, google, nico, zilvia, freshalloy, and so on...so let's end the questions and myths about using these tranny combinations. These are more confirmation and/or clarification questions. Please correct or confirm me on these questions: The rb26 and rb25 bell housing can be mated with any Z32 transmission (since both turbo and n/a are identical internally) without changing the input shaft to compensate for the difference in rb and z32 bell housing length. Although recommended, it is not necessary since the shorter z32 input will still work when mated to an rb motor. Yes? However, this setup will not fit into a S30 chasis without modifying the shifter hole/area and/or the shifter itself since the Z32 shifter is a "linkage style" type shifter and the lengths are different. Yes? You can also mate the rb bell housing to a Z31 transmission also (and the z31 has the same type of shifter and length as the rb25 tranny). Yes? All sr, ka, and rb shifters are interchangable. Yes? When mating the rb26 motor to the rb25 tranny, you can use any flywheel made for a rb20, rb25, or rb26 motor? Clutches that you can use with this setup are any n/a Z32 or rb25 clutch regardless of flywheel. Yes? Rb26 and rb25 starters are interchangable and works with any of the flywheels mentioned. Yes? Rb26 and turbo Z32 clutches will not fit the rb25 tranny because they are 250 (something) and the rb25 and n/a Z32 measure only 240 (something), but you can notch and grind the interior of the rb25 bell housing to use the larger 250 (something) clutches. Yes? Rb26, rb20, and rb25 clutch pilot bearings (the one inside the engine) are the same. Yes? You must use the matching clutch release bearing (the one mounted on the clutch fork) for the clutch being used (i.e...rb25 bearing for rb25 clutch and n/a z32 bearing for n/a z32 clutch). Yes? Parts needed for pull to push clutch conversion include: Rb26 (or Rb25) bell housing Z32 front cover Z32 throw out arm Z32 throw out bearing Z32 pivot ball front cover gasket slave cylinder. Yes? (Taken from http://www.nicoclub.com/articles.php?id=288581) For push type rb25 trannys, you can use a z32 slave cylinder as a replacement.Yes? RB tranny sensors can be swapped out for a Z32 speed sensor for correct MPH reading. Yes? Please add anything else I missed or omitted.

I did an ebay search for search by seller for "motor time", 0 results.

I checked that forum before posting here. I was a former 240sx / sr20det geek before moving onto better things, the s30.

I'm about to purchase a RB26 motor set from these guys, Nagasaki Jdm Motors‏. I've haven't had time to call them yet, every time I have called, which is after work after 5 pm, they were always closed. We've been emailing back and forth, but they take almost a week to reply to each email. Has anyone had experience with them yet? They seem legit going by their site. Here is their site: http://www.nagasakijdmmotors.com/catalog/index.php Mods: If I post this in the wrong forum, please move it please. Thanks.

Yes, the clip is in the states. It's about a two hour drive, but I can go and see the clip. Is there a way for me to start or at least crank the clip so that I can get a compression reading? I have a compression guage, the type where you screw it into the spark plug. I was thinking of dropping a bit or oil down the spark plug acces into the cylinder and then cranking it with a battery. Of course I'm sure there isn't a key so any ideas here? I don't want to bad-mouth anyone, so all I will say is the clip is from an importer in the northern half of California. The compression was done using a "leak-down" test. I'm not sure what that is, but I'm assuming you pump air into the cylinder(s) and test for leaks, so yes, alexidways, I think the compression was done with dry cylinders. What is the compression suppose to be anyways. Thanks.

I know I will get :fmad:flamed:flamedevi, but did a search and couldn't find much usuable info. I'm just wondering if the price on this clip is reasonable(a good deal) or not. I ran across a deal on a complete r33 rb26dett front clip for $3800 with included vlsd with axles, driveshaft, 5 lug conversion, and guage cluster. The motor has 40-45K on it and has been leaked down tested at 165 across. Clip is complete with uncut harness, ecu, mafs(x2), intercooler and pipings also. Any thought are greatly appreciated. Thanks.