RB20DET lagging issue still....calling the rb gods

Discuss the RB20, RB25 and RB26 series engines.
bades
Posts: 85
Joined: Tue Oct 28, 2008 1:24 am

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Ok guys so im still having this issue wit my rb20.... the car feels really laggy down low.... at full boost and pegged the car feels just like normal.... but i have nothing down low.... i double boost/vacuum gauged it and i have no leaks also used my tester.... so now im left wit sum random ideas...

could the eccs be malfunctioning???

odd thing is sumtimes when i first start the car up cold it seems normal... then it goes all laggy after its to operating temp.. ive messed with timing and all and still nothin.....

any ideas oo rb gods???

now i guess its time to build the motor or swap for a 25 or 26.... lets hear sum input.... im shooting for 350-400rwhp.... that is streetable.... i may do a built rb20 wit 9.5:1 head work and cams..... wit a gt30r.....
Modified by bades at 3:13 AM 9/30/2009


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virus77
Posts: 1775
Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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I would check tps first and then mafs

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nos487
Posts: 224
Joined: Wed Nov 03, 2004 3:39 pm
Car: 86.5 nissan V6 5speed truck

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I think my rb20 does the same thing, It seems like it has to much lag, I thought it might be rb25 turbo with no tune yet. Subscribed!

Yellow4g63
Posts: 3718
Joined: Mon Jan 20, 2003 6:07 pm
Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock
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bades wrote:Ok guys so im still having this issue wit my rb20.... the car feels really laggy down low.... at full boost and pegged the car feels just like normal.... but i have nothing down low.... i double boost/vacuum gauged it and i have no leaks also used my tester.... so now im left wit sum random ideas...

could the eccs be malfunctioning???

odd thing is sumtimes when i first start the car up cold it seems normal... then it goes all laggy after its to operating temp.. ive messed with timing and all and still nothin.....

any ideas oo rb gods???
Is the ecu a auto RB20 ecu? did u check your ignition timing yet?

S-tec Motorsports
Posts: 33
Joined: Wed Apr 16, 2008 4:08 am
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knock sensor harness not plugged in

bades
Posts: 85
Joined: Tue Oct 28, 2008 1:24 am

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alrighty guys all my timing is on par mechanically and elec.......ooo and yea im pulling 14-15 in hg at idle.... i bet i f-d up sumthing lol.... i guess its time to build.....


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