Dynoed the RB20 today

[Yellow4g63]

Yeah the car is still busted but I figured I might as well go before I have to pull the motor out of the car. I should have went early but I got there just as the heat started to build. 1st pull was 225@12psi and the 2nd pull was 239@14psi. Lost some TQ with the intake manifold but it seems to carry the top end a little better than the stock unit. Run 5 was Stock intercooler and Intake manifold @ 12psi. It was also 78deg that day lol vs 98 today .

[sean8564]

not bad for stock motor bumped up to 12 psi i thought is should have been a little more

[Carl H]

lookin good man, least it shows you gained power.........now slap that sc61 on it and then tell me whats going on :p.

[blues14]

what should a stock rb20 put down at the wheels?

[DriftingisLame]

what exactly is done to the motor?

[eh?]

Your friend with the RB25 put down 275rwhp with similar mods but with 8 psi.so 225rwhp 12psi vs 275rwhp 8psi on the same dyno.I don't get the RB25 hatred :p

[Yellow4g63]

what should a stock rb20 put down at the wheels?

The blue graph is what I put down with the Stock intercooler and intake manifold. Just had Exhast 3" all the way back and boost at 12psi. at 10psi it was like 186hp. Some people put down more power like Carl's I think he put down 230hp with stock intercooler and intakemanifold.

[Yellow4g63]

Your friend with the RB25 put down 275rwhp with similar mods but with 8 psi.so 225rwhp 12psi vs 275rwhp 8psi on the same dyno.I don't get the RB25 hatred :p

Hate is such a strong word lol. I like my motors to rev

[blues14]

so your running 12psi on the stock rb20 ceramic blade turbo? is that your normal setting?

[Yellow4g63]

so your running 12psi on the stock rb20 ceramic blade turbo? is that your normal setting?

Yeah 12psi is what I have had it at since the last time I dynoed the car. I ran it at 14psi once on the dyno and a few times on the street. Next time I go back it will have a bigger turbo tho and be tuned.

[blues14]

What is your timming set at, if you dont mind me asking. I am looking to extract as much power fr0m my rb20 while trying to spend very little and retaining driveability. low budget racing!!

[Yellow4g63]

Thats a good question but I'm not sure. I had the PFC pluged in but I never set the timming back to 15 deg. I left it at 20 deg so I don't know if the pfc add more to it or not.

[JDMEnthused]

awesome topic.. im looking to swap in an RB20 pretty soon..

[rbsileighty]

At what RPM point do you make peak power with the two different manifolds?

[Yellow4g63]

6100 on the stock and 6600 on the rips from what I can tell. Didn't you dyno your car? the other dyno was with the stock intercooler.

[rbsileighty]

Interesting... so the manifold is worth ~500rpm shift in max power. The thing with manifold design is that it is somewhat independent of power output (with the exception if you are stuffing enough air down with a big turbo that it overcomes design limitations... probably not the case at these power levels)... but it does influence where in the power band where the max power will be produced.

Could you measure the runner lengths on the new and old manifold if you have the time? That would be very interesting to me... cross sectional area of the two different runners would also be good to know as well. I can run some calculations if I can get those numbers to see where math says max power will be in the rpm band. Only if you have time...

I've never dyno'd mine due to the crappy turbo that's on there now... the RB25 turbo should be going on in about 2 weeks when I get back down around my car to work on it.

Cams could have a significant influence on the power level as well since Carl's max power with the RIPS was around 7500 if I recall... which is why it would be interesting to run the numbers on what theory says it should be.

Does the RIPS still use the same base/flange as the stock manifold?

[Yellow4g63]

Interesting... so the manifold is worth ~500rpm shift in max power. The thing with manifold design is that it is somewhat independent of power output (with the exception if you are stuffing enough air down with a big turbo that it overcomes design limitations... probably not the case at these power levels)... but it does influence where in the power band where the max power will be produced.

Could you measure the runner lengths on the new and old manifold if you have the time? That would be very interesting to me... cross sectional area of the two different runners would also be good to know as well. I can run some calculations if I can get those numbers to see where math says max power will be in the rpm band. Only if you have time...

I've never dyno'd mine due to the crappy turbo that's on there now... the RB25 turbo should be going on in about 2 weeks when I get back down around my car to work on it.

Cams could have a significant influence on the power level as well since Carl's max power with the RIPS was around 7500 if I recall... which is why it would be interesting to run the numbers on what theory says it should be.

Does the RIPS still use the same base/flange as the stock manifold?

I would but I don't have a tape measure lol. I'll try and get one from a friend if I can remember. The rips dose use the same base flange from the stock manifold.