made 538 whp and then boom!!!!!

Discuss the RB20, RB25 and RB26 series engines.
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SullivanRacing06
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so i got back on the dyno at rollins. first run netted the same as the last pull did 492whp, made minor adjustments, did another pull to watch fuel pressure and my aem wideband and made 538whp! yay rite!!!!!

made a few more afc adjustments, rolled it thru first shifted to second then to third then opemed it up, aroudn 7000rpm boom! i was like that sounded exactly like my inner cv breaking again, thats not rite i just installed driveshaftshop level 2s, hmm what could it be????????? hmmm four letters VLSD! FU&K thoes rear ends, thank god thatsrguy followed me to the dyno and gave me a ride home, waiting for the kaaz to arrive

untill then ill be


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SullivanRacing06
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ugg, doooh ! i know i should not of trusted a vlsd at thoes numbers

the dual fuel pumps held fuel pressure perfectly! thoes numbers were made on all turbo, no meth, no nitrous, no water injection. all turbo baby!

21 psi and 93 oct!!!!!!!!

but i do have a pretty white 15lb bottle sittin in the corner of my shop and some jets that are good for 150,

i cant wait!

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gmac708
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Dumb question from a noob, sorry. Why would a VLSD cause a CV joint failure and a kaaz (1 or 1.5 or 2 way) not????

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gmac708
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got it, figured it out. SOUNDED like CV but was not.Sorry, my bad.

RBcoupe
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thats awesome man, whats your setup if you dont mind? didnt see it in your other thread.
Modified by RBcoupe at 7:52 PM 2/8/2009

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WhatsADSM
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That sucks.... but at least you got parts coming.

BTW, I swear to god if you put the N2O on while you are still on an SAFC for tuning. Like I mentioned in the thread before you really should at least have a base ROM tune or something now before you go any further.

nismo8117
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oh man when i saw the title of your thread...I was no way! You gotta be kidding me...I thought the worse had happened! DONT EVER SCARE ME LIKE THAT AGAIN!

Cjmartz2k
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I destroyed a stock diff a while back, and have a stupid Nismo one now. Loud and annoying.

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SullivanRacing06
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WhatsADSM wrote:That sucks.... but at least you got parts coming.

BTW, I swear to god if you put the N2O on while you are still on an SAFC for tuning. Like I mentioned in the thread before you really should at least have a base ROM tune or something now before you go any further.
yes yes i know, , im dumb, you have to realize i just dropped alomst 2k into dss axles and a kaaz so they wount break again. that money was supposed to buy me a aem, waiting for a few customers to come thru the shop so i can get some more cash flow going in to a proper ems,

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SullivanRacing06
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gmac708 wrote:Dumb question from a noob, sorry. Why would a VLSD cause a CV joint failure and a kaaz (1 or 1.5 or 2 way) not????
broke a few stock style cvs, so i upgraded to a pair of drive shaft shop axles and didnt count on the vlsd to break on the dyno, easy roll on pulls.

kaaz is somewhere in a package being driven to me from the other side of the country

when it gets here ill be happy

also waiting for a nismo power brace to arrive

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mean240
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@ least it wasn't your motor... your title makes it seem like it was the motor.. i wouldve been pissed!

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SullivanRacing06
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yea, it was a hell of a noise and the started jumping around on the dyno, it was a hell of a ride in it when i popped on me. jumpin n stuff

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HxC_Nismo
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so let me get this straight you pretty much destroyed your stock vlsd diff? ive broken axles before and i upgraded to an n/a z32 diff with j30 axles (wich are alot beefier then the stock 6bolt axles). well im pushing 488rwhp with my rb and im wondering is there a real noticiable gain in acceleration with an upgraded lsd like kazz or tomei?? or will my stock z32 lsd give out on me over real soon?

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SullivanRacing06
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HxC_Nismo wrote:so let me get this straight you pretty much destroyed your stock vlsd diff? ive broken axles before and i upgraded to an n/a z32 diff with j30 axles (wich are alot beefier then the stock 6bolt axles). well im pushing 488rwhp with my rb and im wondering is there a real noticiable gain in acceleration with an upgraded lsd like kazz or tomei?? or will my stock z32 lsd give out on me over real soon?
idk what to tell you, ive had people respond wil "my vlsd let out on me at 250whp" so not to sure, also i have launched the car on mts quite a few times on this rear end, thats when it started making a hell of a noise!

dont quote me on that tho

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SullivanRacing06
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Cjmartz2k wrote:I destroyed a stock diff a while back, and have a stupid Nismo one now. Loud and annoying.
my kaaz just arrived, cant wait to install it later tonight after my girls soccer game for UF.

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SullivanRacing06
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WhatsADSM wrote:That sucks.... but at least you got parts coming.

BTW, I swear to god if you put the N2O on while you are still on an SAFC for tuning. Like I mentioned in the thread before you really should at least have a base ROM tune or something now before you go any further.
im still deciding on either a emanage or aem

not to sure yet, just did a motor job so im ready to invest in a ems system

input to any other 26 owners, or rb owners that HAVE or DO own one of these systems. thanks!!

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BoostFab
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SullivanRacing06 wrote: hmmm four letters VLSD! FU&K thoes rear ends
time to upgrade the q45 rear end!!! but wait; you got the kaaz

also, go AEM...or Haltech E11 plug and play.

mattleegee
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i dont mean to sidetrack the thread or anything but....wait...

we can use q45 or z32 diffs? Then we just have to get new axles to fit them or?Im trying to replace mine because when i bought the swap shell the guy said the diff was making noise... im sure the stock rb will just finish it off right away..

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SullivanRacing06
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BoostFab wrote:time to upgrade the q45 rear end!!! but wait; you got the kaaz

also, go AEM...or Haltech E11 plug and play.
yea ive got the kaaz sitting on my box now, had to install the nismo power brace and a pair of caster arms tonight, didnt feel like pulling rear end out n apart tonight to install the kaaz, man oh man you should see the rear end i blew up, first off the internal unit isnt sealed, which leads me to believe its a s15 rear end, it had clutch packs in it, the pinion gear is smoother then a piece of paper and the ring gear is shreaded to hell!

neonbomb
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Cjmartz2k wrote:I destroyed a stock diff a while back, and have a stupid Nismo one now. Loud and annoying.
**** you dont like yours? I was gonna go with a Nismo 1.5 way but my 3000gt buddy is trying to convince me to buy an OBX HLSD and redo it.


FAST-DATSUN
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Be sure to check ring and pinion back lash and tooth pattern(proper meashing) to ensure not to kill the gears after the install....

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SullivanRacing06
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FAST-DATSUN wrote:Be sure to check ring and pinion back lash and tooth pattern(proper meashing) to ensure not to kill the gears after the install....
damm mack, i havent talked to you if forever! thoes lower rb25 shifter bushings worked like a charm!

installed the kaaz in to a old open housing with a semi low mile, 84k, set of gears, stupid 3.91

id like to find another 2.90 or locate the 3.54 out of a earily q45

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SullivanRacing06
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neonbomb wrote:
**** you dont like yours? I was gonna go with a Nismo 1.5 way but my 3000gt buddy is trying to convince me to buy an OBX HLSD and redo it.
no ebay obx plz, theyll keep you the entire time, they scare me, id rather have a jap "proff" assemble mine, not a child labor payed "starvin marvin" assembling a diff on the dirt floor of his parents hut.

pay the extra two hundred or three hundred and get a quality kaaz or nismo, i broke mine in last night, not loud at all

Couped_up'd
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DAMN!!!

Whats your set up mang?


sepulchralx
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do you have stock internals in your motor?

PhenomR33
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nice numbers on your pump gas. GL with the rear end

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SullivanRacing06
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sepulchralx wrote:do you have stock internals in your motor?
nope

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SullivanRacing06
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PhenomR33 wrote:nice numbers on your pump gas. GL with the rear end
just got done with breaking in with breaking in the kaaz, works perfectly! cant wait ot launch it hard


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