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You don't have to... the main reason that I did was because I have a 98 and I didn't want to have to deal with all the emmission nonsense that nobody can figure out.
I own a 97 200SX SE-R, After blowing up my first SR20; by a spun bearing, I bought a Roller Rocker engine off a 2001 sentra SE. The swap was easy and my car felt a whole lot faster. I used the stock 97 low-port intake manifold, and some E-bay headers, along with a short ram intake. After finding out that the RR engine does not like revving high or bigg boost I decited to go with laughing gas. I pieced out a kit and installed a 50 wet shot of nitrous. I had my timing @ 17 advanced and ran 93 octane. Soon my clutch went out and I installed a stage 3 from ACT. Well shortly after breaking in the clutch I install a G20 ecu; bad idea! Took the engine to a couple of time to 7500rpm's without a prob, shortly after I start to hear a strange nock. So after poping the valve cover I installed a new timing chain kit. The sound does not go away and I have determined that the engine is missfiring and currently running on three cylinders. Burnt valve???
I just performed a compression test and it reads as follows 153 151 125 150 seems to me cylinder 3 might have a burnt valve but the funny thing is that it keeps the copression. I did a cylinder leakege test and it holds compression. I think the rings are bad or coluld it be that I have a faulty injector on #3 only?
Does anyone have any info on using rollers on RWD highport engines? I hear arguments back and forth about cams. Some people say you dont have to run roller cams while others say you do...
Clark Stepplar told me that you are supposed to run roller cams w/ the roller valve train because of the difference in valve heights and radius ratios when I asked him that question.
Hope reading doesn't own me. But I tried to find an answer to my question and didn't see any solid statements that it WILL work. I'm wanting to keep my DET intake manifold and head. Can I swap over Cams and roller rockers over to my Highport head or do i need to swap everything like springs and valves. I'd like to keep the springs and valves cause there stiffer and it's less work. But I'll do what I have to in the end just don't want to redo my intake pipe and rewire my harness in my NX. Anybody got dyno numbers on RR valvetrain and bottom end with DET pistons. Looking to see the power curve.
__________________ 1993 NX2000: Weekend fun car 1990 Accord: New to me Daily Driver
I know can the lowport RR cams and rockers be put into a highport head. This will be way outta of your likening eric. I'm thinking super frankenstien motor. RR block and crank+DET pistons+Highport head and Intake Manifold+RR cams and rockers.
EDIT: basically a low compression RR highport motor.
Last edited by Octave236 : 04-16-2008 at 04:06 PM.
Hope reading doesn't own me. But I tried to find an answer to my question and didn't see any solid statements that it WILL work. I'm wanting to keep my DET intake manifold and head. Can I swap over Cams and roller rockers over to my Highport head or do i need to swap everything like springs and valves. I'd like to keep the springs and valves cause there stiffer and it's less work. But I'll do what I have to in the end just don't want to redo my intake pipe and rewire my harness in my NX. Anybody got dyno numbers on RR valvetrain and bottom end with DET pistons. Looking to see the power curve.
It should fit, because the heads are essentially the same, but the valve lengths are different by 3mm from what I remember. I think the RR valves are shorter so the entire (valve train) swap will be needed. The conventional has a 40 mm install height and the RR has a 37mm.
What I'm wondering is... if the springs have the same diameter profile. If that were the case, even if they had the same spring force - your highport springs may have some preload if you use them instead of the RR springs. That would be sweet if that were a hidden upgrade. There are more harmonics in it than I understand. In other words, safe bet replace everything including the adjusters... or pioneer and rock the conventional springs.
But for the record... I think that the majority of the difference in power probably lies more from the bump in compression from the combustion chamber difference rather than the efficient valve train... That's an assumption though... it would be interesting to see what the actual difference is.
You'll never know until you try though. So if you do post up.
Last edited by XxToKeSxX : 04-16-2008 at 06:03 PM.
It's leaving wether i hear the right words or not. Im gonna take it to school and check spring pressures at different hiegths and what not. Maybe I'll be a pioneer and not a follower. The DE-t didn't feel much peppier than the DET did to me, but we'll see if compression plays a huge roll. I just like boost
It's leaving wether i hear the right words or not. Im gonna take it to school and check spring pressures at different hiegths and what not. Maybe I'll be a pioneer and not a follower. The DE-t didn't feel much peppier than the DET did to me, but we'll see if compression plays a huge roll. I just like boost
WTK: how many ppl here running the roller rocker sr20 are using the 2 pcs UR pulleys, I have researched the topic, found lots of info both good and bad. My real question is for those who have been using these on their motors... Have you encounter any problems, how long have you been using them and have any of these issues such premature bearing failure, happened to anyone?
WTK: how many ppl here running the roller rocker sr20 are using the 2 pcs UR pulleys, I have researched the topic, found lots of info both good and bad. My real question is for those who have been using these on their motors... Have you encounter any problems, how long have you been using them and have any of these issues such premature bearing failure, happened to anyone?
The info on that topic is very blurry.
some people say you can run it no problems,
some people say you can but only to certain rpms,
some people say you shouldn't run the crank pulley because of the harmonic balance issues with the 4cw
some people say you will run into problems.
The only real fact that I have come across is the RR DE pulley (at least mine anyway) is already lighter than the conventional DE's... The thing that sucks is a lot of the hoopla is based on misconstrued fact, opinions, and he said she said, it gets reiterated - and is part of the reason the roller variant gets its bad wrap. The sad part is half the comments come from people that don't own the motors! As a result of not being able to sort through the bull sh*t I didn't know the answer and I chose to stick with the stock lighter pulley instead of learning the hard way since this is my daily.
Last edited by XxToKeSxX : 06-26-2008 at 09:40 PM.
i have yet to meet one rr sr20 that had a problem i had the pullye for 60k and 20k was turbo and in my backyard is a b15se with a ur pulley and he's had it for almost 100. Find me one person and i'll admit i'm wrong.....
XxToKeSxX... this is the only way to settle the argument once and for all, getting the opinions of the people who have been using them... no more he said she said, lets get some facts. these motors have been out for quiet sometime, and just like rooster said "i have yet to meet one rr sr20 that had a problem"... thats the info i'm looking for, if more than 10 people have used the pulleys successfully on the daily drivers and race motors with out any issues then i'd safely say that i'd use them... the only real issues was the post from the g20.net forum, when the guy had issues installing his, but everyone else on that t
can the lowport RR cams and rockers be put into a highport head. This will be way outta of your likening eric. I'm thinking super frankenstien motor. RR block and crank+DET pistons+Highport head and Intake Manifold+RR cams and rockers.
So if you do post up.
It's leaving wether i hear the right words or not. Im gonna take it to school and check spring pressures at different hiegths and what not. 