RB25drag I want to race.........

Post by **kentuckyslider** » Tue Dec 16, 2008 4:14 pm

you this spring. Who is going to get in the 6's first? I'm going top mount T3 over the winter with a holset HX35 and a tial gate. Should give me 100+whp if I don't run out of fuel with the 72lbs inj and a rom tune. Even if, I should have the fastest rom tuned SR on nico?

Post by **rb25drag** » Thu Dec 18, 2008 1:50 pm

im down with that man. Ive got a completely different setup for 2009.finishing up my propane swap this weekend and i got the precision turbo going on by march.we should be really close.starting this year we are starting a stick shift class at i-40 dragway. its heads up run wat u brung on dot approved tires. its stick shift cars only. you should come down.its going to be once a month on friday night.

Post by **kentuckyslider** » Thu Dec 18, 2008 7:04 pm

I have to run my et streets and not my MT drags? That sucks but I promise you I will make the trip at least once. I will be tuning my setup by the end of February so let me know. We will have similar output turbos with the HX35 and the SC61, both flow about 60lbs/min. I would like to throw out an invite to any nico member who thinks they can hang. ATL is just as close as I am (3 hour drive) and so is Bristol and JGY in western VA. Please come and get some!!!!!

I WOULD LOVE TO RACE A NEW GTR WITH THE TOP MOUNT! Ive already spanked a couple of C6 Z06's with my little 2871R!!

Post by **rb25drag** » Fri Dec 19, 2008 1:57 am

we are still making the rules for the class. im trying to get et streets legal. so will see how that that works out.i agree we need more nico guys running with us.my goal is to run with my buddy who has a turbo 302 mustang. he averages 6.80's but has ran the best of 6.60 with the 5speed.my weakest link is my axles. im gonna have to upgrade to the driveshaft 1000hp axles when i start making around 600@ the wheels. im just a tight *** right now lol

Post by **ANVIL** » Fri Dec 19, 2008 7:32 am

how far is the nearest 1/4 mile track to you guys? 1/8 hardly seems like a race to me. i dunno. what gear are u in when u finish? 2nd?

Post by **rb25drag** » Fri Dec 19, 2008 3:47 pm

i am about 3hrs away from a 1/4 mile track.when i had the 17inch wheels on i would hit 4th gear. now with the 15inch wheels i got i only get top end of 3rd gear. but on my new setup i should be top end of 4th gear and about 110+mph in the 1/8th.

Post by **kentuckyslider** » Fri Dec 19, 2008 8:31 pm

110 in the 1/8th??? That's a low 6 sec pass and a high 9 sec pass in the 1/4. If that's true I don't want any for sure but IMO that's a pipe dream!

Post by **rb25drag** » Sat Dec 20, 2008 2:49 am

im not playing around anymore lol. 9 sec 1/4 is what i plan on.I have went 7.80's on stock turbo. so i figured with 250+ more hp i should easily be mid to low 6's.i dunno how possible it is. But the guy at my local machine shop thats helping me with my propane swap has a set of scales were going to balance my car and im bracing the entire car and putting stops on my front end to set it on the bumper out of the lights i have never seen a 240 do a wheelstand so thats my goal. I might crash n burn. but im sure gonna try.

Post by **kentuckyslider** » Sat Dec 20, 2008 8:34 pm

So you are going to have a SC61 on a RB25 with propane injection right? You're thinking 600+whp, It should get in the mid to high 6's but it won't pull the tires.

Post by **rb25drag** » Sun Dec 21, 2008 3:00 am

somewere in that ball park man. I really dunno if it will pull the wheels or not. With the weight and suspension setup right it should. thats why i am putting it on 4 scales to get it pretty = balanced.its not injected. ive got a propane carb on it. Its no longer powered by gas. Just propane only.we are running a bunch of tests with it these next few weeks. ill be street tuning by wed and ill be on the dyno hopefully by next sat with the stock turbo setup. Then im going megasquirt ecu and the sc61 turbo.

Post by **kentuckyslider** » Wed Dec 24, 2008 8:38 am

I am thinking my SR will be capable of low 7's maybe high 6's in the 1/8th(low 11's maybe high 10's in the 1/4) with the holset top mount. I will have to go stand alone EMS and bigger injectors if I want to push over 25psi and 500whp. That is what it takes to get a streetable S chassis in the 10's at the track

Post by **rb25drag** » Wed Dec 24, 2008 6:14 pm

yup gas tuning sucks!! thats why i went propane. I believe itss going to simplify all my tuning alot. plus the octain of gas is not wat it use to be. it really sucks now. vs the propane the octain is always the same and the fuel never goes bad. Im going to be running a bunch of tests with it these next few months ill let u know how it goes. it might be a better/ cheaper route for u also.

Post by **Koshin** » Thu Dec 25, 2008 3:23 pm

going to be epic...I wanna go watch

Post by **rb25drag** » Sat Dec 27, 2008 2:38 am

well i finished the entire propane swap yesterday. I went to start it to test drive it when all it would do is backfire. hmmm so i pulled the timing cover. its fine and in time. So i done a leak down test to find every cylinder 50-60% leakage. You can crank the psi up to 80 and it will seal up to 10%. So i gotta pull my head today and find out whatts up. I have had a cold starting problem since day 1. I just have not found the problem until I started using a vaper as fuel.I hate this rb. If i had to do it over again it would be ls1 & 6speed.

Post by **kentuckyslider** » Sat Dec 27, 2008 8:37 am

Rb's are a pain in the a$$. I will go 2jz if I build another S chassis. You can buy JDN 2jzGTE from aristos or soarers for less than $2K and run 700+ whp on the stock bottom end with the right setup. I love my sr but it will never see 700whp on a reliable setup. 400whp on a stock SR block is like 800 on a 2jz.

Post by **rb25drag** » Sat Dec 27, 2008 1:54 pm

Ya This Rb has been a pain from day 1.

I took the head off today and found most all the valves have been leaking for a while now. After grinding them down there was 4 that was bent. So im putting a good valve job bck on them and porting the head while I got it down and it should be back to 100% .

Maybe now this thing will crank cold easy.

Ive seen a few 2jz's around here making some pretty good power. But in the end they are as expensive as a rb is.

Post by **ANVIL** » Tue Dec 30, 2008 11:57 pm

rb25drag wrote:i am about 3hrs away from a 1/4 mile track.when i had the 17inch wheels on i would hit 4th gear. now with the 15inch wheels i got i only get top end of 3rd gear. but on my new setup i should be top end of 4th gear and about 110+mph in the 1/8th.

dayum, thats like my 1/4 mile 108, top of 4th.

u probablly posted before, but what rear end are u using

Post by **rb25drag** » Thu Jan 01, 2009 4:41 am

stock r200 welded to full posi. I gotta upgrade to the 1000hp axles tho. But i wanna see what i can do on stock axles first. I have broke 2 sets but thats B/c i launched too hard. With my new setup I should be able to be a little easier on it out of the gate. Possibly a 4500-5000 launch vs my previous 5500-6400 i been trying.

ANVIL wrote:dayum, thats like my 1/4 mile 108, top of 4th. u probablly posted before, but what rear end are u using

Post by **kentuckyslider** » Thu Jan 01, 2009 6:43 pm

I have a 4.36 skyline RB20 diff and I launch at 7000rpm on wrinkle walls and I've never broke an axel. The stock 6 bolt axels ar not near as strong as the J30, JDM, and Z32 5 bolt axels. I would suggest a change to a 4.36 R&P and the 5 bolt axels. I got mine from JHOT in GA. (706)364-5468. Ask for Gabe. My whole setup was less than $300. That's alot cheaper than the 1000hp axels and you will gain .2 with the 4.36 for sure and the car is easier to launch with the shorter gearing.

Post by **rb25drag** » Fri Jan 02, 2009 2:50 am

did the rear end just bolt in? Also is it 4 lug hubs or 5? if its a 5 lugs then ill have to change my rear wheels. Which isnt goin to be cheap either.the 4.36 would prob help me in the 60ft for sure. Maybe get me to that 1.4 i want.I will do some research when it becomes time to change it. thanks for the number ill give them a shout.

Post by **kentuckyslider** » Fri Jan 02, 2009 12:46 pm

Yes they bolt right in and you don't have to change your hubs, just he axels and diff. They bolt up to the subframe just like your stock unit, unlike the J30 and Z32 diffs that require a bushing kit for the different snout. The only 4.36's were in the R32 skyline with the RB20 and the 180sx with the CA18. Gab will know what you need. I have a J30 3.91 with the ES bushings and a skyline 4.36. It takes less than a hour to swap with a helping hand.

Post by **rb25drag** » Fri Jan 02, 2009 3:44 pm

are those a 1.5 limited slip? also what about the differential cover? don't they have to be swapped?i think i would weld the gears up to make it a full posi. i hate the vlsd's.thanks for the info. its gonna help me finish everything on my to do list lol. its gettin smaller tho.

Post by **kentuckyslider** » Sat Jan 03, 2009 9:01 pm

The 4.36 is a direct bolt in, the snout and the rear cover are the same as you stock unit. With the J30 and Z32 diffs you have to swap the rear cover and get ES bushings for the snout to mount properly. Trust me I have both.
Modified by kentuckyslider at 11:43 AM 1/4/2009

Post by **rb25drag** » Sun Jan 04, 2009 4:17 am

sweet man. thats prob what ill buy when it comes time to change it.at the moment im still having engine problems.got the head back on and it still wants to backfire. found that my 2step gizzmo launch control might be bad.im ordering a megasquirt on monday and going to the ls2 truck coils and elliminating a bunch of problems.

Post by **hooperstar** » Sat Jan 31, 2009 5:43 pm

just curious what suspension u guys running? i got about 470 to wheels in my s14 chasis i just need it to squat and go what do guys suggest thanks

Post by **rb25drag** » Sun Feb 01, 2009 3:54 am

im personally running stock struts & tein lowering springs with the rear springs modified. 1/2 a round cut out to lower the center of gravity.On the stock struts and non modified tein I went 1.6 60' on Mt et streets & 340ish @ the wheelsIll be making anywere from 500-620Whp this season so I hope to see some 6 sec passes !/8th mile and some 1.4 60's

Website · Post by **nelson8708** » Fri Feb 13, 2009 3:02 am

Hey KentuckySlider i found a vid that might interest you. Just a little inspiration for your build. If he did this on a stock engine you should have no problem meeting your goal. I tell ya for all the stuff the guy has done in the video he needs to look into some engine mounts...sounds nasty on the dyno though.

http://www.youtube.com/watch?v=HlKfoibQ6w8

Post by **S14-NEO** » Tue Feb 17, 2009 12:54 pm

come and get some RB25drag...ill be waiting when yours is all done..

Post by **rb25drag** » Sun Mar 08, 2009 11:03 pm

S14-NEO wrote:come and get some RB25drag...ill be waiting when yours is all done..

I am def ready to come play. I cant wait to run the new setup. I have about another month worth of work to physically finish it with all the fabrication. Then I got about a month of tuning before I get to hit the track and lay down some times. I wanna be 100% ready for the track.

Post by **Comrade** » Wed Mar 11, 2009 3:20 pm

rb25drag wrote:I am def ready to come play. I cant wait to run the new setup. I have about another month worth of work to physically finish it with all the fabrication. Then I got about a month of tuning before I get to hit the track and lay down some times. I wanna be 100% ready for the track.

..that's assuming your exhaust finds its way out. hahaha

RB25drag I want to race.........

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