Thread: Boosted Roller Rockers

Though I wonder if his RR is better since he is outside of US. US RR's got beat by the emissions stick and hence it only revs to 6700, hence they made internals weaker too.

He has some very impressive numbers though!
http://www.sr20-forum.com/turbo/13014-another-turbo-p11-dyno.html

When his RR finally gave out:
http://www.sr20-forum.com/turbo/15938-finaly-rr-motor-gave-up.html

Mine came out of a 01 sentra and I beat the piss out of it with stock cams, today I had it at 150 like twice, no issues at all. I can't even imagine this thing with cams, I love the torquiness it has. Hey Vadim if you want Ill ship you my roller and you can experiment with that. I won't need it once I throw the ve in my b14.

I might will be interested in purchasing your intake cam actually! I have a theory (based on FSM numbers) and want to prove it. I have a G20 RR in my garage, but I think it needs a good rebuild, maybe I should throw in DE pistons into while I'm playing around with it.


Here are some cam specs that I looked up in the G20 and Sentra FSM's. Looks like swapping in a 2001 Sentra intake cam, will give you more lift and duration on a G20, and 01 Sentra's can benefit from a G20 exhaust cam.

ROLLER ROCKER CAMS
G20 2000-2002:
INTAKE - .370" (9.4) LIFT / 232º DUR - EXHAUST - .346" (8.8) LIFT / 240º DUR - OVERLAP - 8º

Sentra 2000:
INTAKE - .339" (8.6) LIFT / 240º DUR - EXHAUST - .362" (9.2) LIFT / 232º DUR - OVERLAP - 9º

Sentra 2001:
INTAKE - .370" (9.4) LIFT / 240º DUR - EXHAUST - .346" (8.8) LIFT / 232º DUR - OVERLAP - 9º

I'm still trying to fish out JWT S3R cam specs.
So far I have this:
S3R Roller Rocker - .450" (11.4) LIFT / 262º DUR - ??

LOL what you up to Vadim! I was also wondering about the different stock cam setups they have. Cause mine pulled to seven pretty well.

I'm up to no good as usual. I just like to study something and then change my mind on if I want to run that setup 20 times... I blame Keo for that

We can try that as well, I am curious to see how it will behave with that exhaust cam, I wonder what spool would be like with that cam. Just let me know V, I'll check to see if I can source another intake cam like the one in my engine.

I wouldn't mind getting some real life measurements, maybe the FSM has some typos .

Though 01 Sentra cams have more exhaust lift, but less duration. That might make them more boost friendly, I do find it odd that Sentra cams have more overlap too.

My sentra gets horrible gas mileage, I don't know why I usually drive at 71mph on the highway which my work trip everyday is about 25 miles total almost pure highway. I iget about 150miles per half tank. I do like the way it feels N/A though, it has the power where you need it, plus the b15 trans is awesome for the N/A. I would like to cam it and be done with the intake head exhaust though.

Now think about power that low down in the power band with a t25! It just compliments it even more daily driver wise. I wish I woulda just boosted the roller rocker Had lol. I woulda been happy with the tq band and gas mileage.

When I had the t25 on my roller it did feel faster than the 71r i have now. And it only boosted 5 lbs because of a bad wastegate, it seemed like I could get to 150 faster with the t25 but with the bigger turbo the boost hits real hard when going into fifth while boosting. So I don't know whats better, I did have a shitload of fun with the smaller of the two. Fuel mileage was pretty decent also. My car has half a tank now with 227 miles on the trip odometer and can easily squeeze out another 175 miles without going to empty and burning up the pump. Vadim I know you will love the roller on boost especially with the p11 because it will just roll with it no problem even more so if you have a t25 that will boost higher than 5 lbs.