Need some help. rb20 is slow as a dog when out of boost.

[Nissan_Sean]

Why did you buy bigger cams to increase low end response? 270 is huge. You're just moving power further up the rev range.

[M13]

Why did you buy bigger cams to increase low end response? 270 is huge. You're just moving power further up the rev range.

Yes you got too much duration for moving the power range down. Should have gotten more lift and moderate duration.

[dawgmode]

Yes you got too much duration for moving the power range down. Should have gotten more lift and moderate duration.

with the 270s the spool comes in almost 1000rpms quicker and this is with a bad tune....not to mention they sound ridiculous at idle...needless to say we are happy with them..just cant wait to dyno with them!

[Skym]

That could be due to richer A/F ratio at lower rpm's which produces more exhaust gas and spools turbo earlier.

[M13]

with the 270s the spool comes in almost 1000rpms quicker and this is with a bad tune....not to mention they sound ridiculous at idle...needless to say we are happy with them..just cant wait to dyno with them!

do you have a vid of idle?


maybe just needs a good tune for your problem in the OP.

[dawgmode]

I have on one facebook but I have to get it on utube so I can post a link on here...I just can't wait till we get a good tune on the dyno to see what numbers we get..we have our fingers crossed for around 450. Marco from Billet Design Motorsports out of Florida comes down and tunes the car. What do you guys think of getting water injection?