So I decided to play on the dyno....

Discuss the RB20, RB25 and RB26 series engines.
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blurrbosi
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Car: 240's

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I was curious to see what she is making on the stock setup... and i was pretty impressed!

On my 97 w/ RB the setup is...

S2 25Ebay intercooler... 290 shippedTook a bit of custom piping on the intercooler plumbing...3 in elbow back Baker DPApex N1 3.5 inAEM Wideband and Truboost

@ around 10 lbs holding... 317.xx

@ 12.5 - 13.0 Holding... 323.xx

This was all on pump gas. For ****s and giggles I threw 4 gal of c16. I was limited to what I can adjust with only stock fpr and Tru boost.

Maxed @ 327.xx @ 13.5psi only because I am forever having an issue @ higher boost (ie. 12 psi and above) It breaks up/sputters a bit. I am going to regap my plugs probably to like .022 or 21... Olny because I am pretty sure I dont have any fouling coilpacks...

The Dyno Video will be posted and you will be able to hear the breaking up... but since I was in the shop I kept it floored to see how bad hp was effected.

I was going to wait till I had the video to post but it will be done today or tom...

Thx for looking


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cdorhout
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Next project TBD

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If it's sputtering and breaking up only after cranking the boost up, you may need to retard your timing in those cells.

Looks good though! Very strong for stock"ish" setup.

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Shocker
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this is why I hate dyno numbers lol those are HELLA high for stock turbo lol, go get me a trap speed please.

Nice never the less.

rb25drag
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Car: 1990 Nissan 240SX 5.3 Chevy + 60mm turbo + blow threw carb.

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Shocker wrote:this is why I hate dyno numbers lol those are HELLA high for stock turbo lol, go get me a trap speed please.

Nice never the less.
Why would these be high numbers? I understand everyone rapes the stock turbo, But I see those as about right. Mine stock turbo should be around that if not More.

Im getting my setup Dynoed soon, According to the ONLINE E:T calculations with the car weight, speed and tract E:T Im estimated at 376WHP,

That seems high to me, But none the less I think the stock turbo will push it. IMO

I will let you guys know soon of what the stocker is capable of before it blows!

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blurrbosi
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cdorhout wrote:If it's sputtering and breaking up only after cranking the boost up, you may need to retard your timing in those cells.

Looks good though! Very strong for stock"ish" setup.
Stock computer blows. I will be posting a dyno with the aem after I get some dattalogging done.

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matafied
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rb25drag wrote:Im getting my setup Dynoed soon, According to the ONLINE E:T calculations with the car weight, speed and tract E:T Im estimated at 376WHP,
376! ummm im not sure that stock turbo could flow that, but it would still be fun to try

but very nice numbers blurrbosi. i see the coils are holding up ok so far

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rustbucket
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Hey blurrbosi, are those numbers to the wheels or flywheel?

Rb25drag, you would have some kind of factory freak turbo if you're pushing 376whp.

Im only pushing about 250whp@14psi with a fmic, nismo fpr, HKS EVC IV, Apexi filter and 3" drag pipe.


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blurrbosi
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matafied wrote:
376! ummm im not sure that stock turbo could flow that, but it would still be fun to try

but very nice numbers blurrbosi. i see the coils are holding up ok so far
Yah. Thx shane!

Rustbucket - I think you could mabye flow 375 if you ported and reinforced the wheel.... if you know people...

Yes those numbers are to the wheels.

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Shocker
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Ehh like I said... go get a trap speed please. I made 277rwhp at 11 psi, your making about 50 more at basically the same level..... My motor and turbo was very healthy. I trapped 109 on numerous occasions that was on DR's. So if you trap 112-114 I'd believe what the dyno is saying.

rb25drag
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Car: 1990 Nissan 240SX 5.3 Chevy + 60mm turbo + blow threw carb.

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SHocker, What is your 1/8th mile trap times and speeds?

My last years best was 7.80 @ 91MPH in the 1/8th, I don't have a 1/4 mile around me. Thats Stock turbo, Stock exhaust and intake manifold, Stock ECU, SAFC II, FMIC, Z32 MAFS, Stock injectors with FPR, with a stage IV Cusco exedy race clutch No launch control, 8 inch slicks, and a 5800 launch with a 1.6 60', All internal motor work, on 10lbs of boost. Factory freak? Dunno but Im getting it dynoed soon so ill let you know. But I havent seen ANYONE with a similar setup to mine run with a half second of me in the 1/8th.

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Shocker
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your rocking man ^^^^ thats a ****ing fast 1/8 I'd say factory freak unless your track is on a downhill lol, I was at Norwalk heres the slip


rb25drag
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See your 1/8th mile looks like mine when im running 6lbs of boost. I trap 8.45 @ 86 on 6lbs of boost. cutting 1.9 60'

You could be running 8.0's with my 60', Thats were your loosing alot of your time. Are you running any kind of drag radial? Also is that on 11PSI?

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Shocker
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rb25drag wrote:See your 1/8th mile looks like mine when im running 6lbs of boost. I trap 8.45 @ 86 on 6lbs of boost. cutting 1.9 60'

You could be running 8.0's with my 60', Thats were your loosing alot of your time. Are you running any kind of drag radial? Also is that on 11PSI?
Yeah, BFG's, and no I just suck at launching, I now feel it had a good deal to do with my clutch engagement at the firewall, possibly my megan coilovers as well limiting weight transfer... I'll learn this year, I've been practicing in my beater lmao. yes 11 psi.

rb25drag
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HAHA now your scaring me, I just switched to Megan coilovers to get some of the front end bounce out of the launch. I might have to switch back to my Tein springs in the rear if I can't get it to launch any better.

I have found it best to give the clutch a little slip when coming off the line with no launch control. Mine usually still bogs a little due to no boost.

Since I have this new gizzmo setup It should be a total different car coming out of the hole! Hoping for 1.4-1.5 60's and a nice 7.50 in the 1/8th.

But I also have been shifting at 6200rpm's b/c I thought our redline was 6400, So I have been undershifting it also. You guys said it was 7,000 so ill try that this year too.

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Shocker
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Well the megans really have zero to no weight transfer fully dampened, hardly any lol. It does feel like I can almost pull the front end off the ground on the 1-2 shift, its unforgiving.

I'm a little afraid to use my mircotechs launch control... just because of the horror stories of oil pump failures due to 2 steps/launch control units.....

I apologize for the thread hijack.

240z4u
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I am also seriously considering going back to drop spring/shock combo. I hate the ride of the megans and they are not going to transfer weight for crap.

Evan

BTW, nice 60's guys

rb25drag
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Ya it sounds like the megans are going to be out the door for me.

My teins (lowered springs) worked nicely on the launch. Dad said he could stick a wallet under my front wheels off the line but I got a nasty bounce shifting to second that has resulted in a near drift!! LOL so I was hoping to get the megans to stiffen up the front and keep the car in my lane.

But I will let you guys know in 2 weeks how they work out for me. Although Ill be on my street tires ( don't wanna break another axle on the first pass of the year) I should be able to see if I like them or not.

How do you guys have them setup? Soft in the rear and Hard in the front? cause thats how mine are.

Ya sorry for the thread jack!!

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Shocker
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Mine were soft in rear hard in front. I'll try to Megans again but Since I'm not a dedicated 1/4 miler, I plan to switch out my rears this year for stock suspension I saved, and readjust my alignment to compensate. I feel this will for sure provide an excellent 60ft.

I personally like road racing better, hitting hard apex's, then blasting out at WOT is a feeling that just cant be described unless you have done it. Its been awhile, I'm making myself excited to work on my pile later tonight lol. My tax refund better come STAT I need tuning money lol.

rb25drag
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I have never done any road racing, There is no were's around me that does it. I live in the woods LOL!!

I would love to try it sometime tho.

I just replaced my Rucas with some adjustable ones, so maybe I can get the camber adjusted and get Alot of my 11.5 inch M:t drag radial on the ground and get those megans to hook and scream like a slut she is!!!

How close are you to done?

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Shocker
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rb25drag wrote:
How close are you to done?
If I work hard and everything goes right possibly this weekend.... till at least a turn key....

rb25drag
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HAHA If your like me, My remote wire decided not to work this last time, So I said screw it and I wired in a Push button for the starter. Works like a champ and she fired right up!!! Sounded pretty too.

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blurrbosi
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You guys might consider running softer levels so the car can throw all weight to the back tires. Soft all the way around.

Shocker I havent had time to take this car down the track yet, mostly on a gsxr 1000 at the 1/8 or 1/4. Her time will come though.

The numbers are off our new dynojet 424x. Its ok if you are confused, i'm just waiting on my knucklehead video producer to get the video up. We record dyno runs and post them on our local shop forums.

Here is one from my buddy glenn who is now using this car in the formula d circuit.

http://video.google.com/videop...72219

^My video will be done shortly.!

rb25drag
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Nice video, Thats some really good numbers. Any idea of how much boost he was running?

Softer suspention is the idea on the rear. I had soft up front also, Nearly whipped out a TT vette due to the front end bouncing causing my rear end to get loose and turning a drag into a drift competition. Then Driver Mod has to kick in LOL!!


gawdzilla
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blurrbosi wrote:Here is one from my buddy glenn who is now using this car in the formula d circuit.

http://video.google.com/videop...72219

^My video will be done shortly.!
damn, that video makes me regret going such a big turbo. sounds and looks like it has great power band

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Shocker
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yeah deferentially nice video, whose car is that?

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rustbucket
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Suprise, another Jack:

I managed a best: 1/8 7.859 @ 88.42 mph with a 1.68 60ft using the stock shock setup in the back and Tein HA coilovers in the front. Cant pull the front wheels off though, not enough TQ. My mickey T drag radials are only 9.5", gonna go with 10.5"s when they wear out. I prefer these over the BFG's, those are junk imo.

rb25drag
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rustbucket wrote:Suprise, another Jack:

I managed a best: 1/8 7.859 @ 88.42 mph with a 1.68 60ft using the stock shock setup in the back and Tein HA coilovers in the front. Cant pull the front wheels off though, not enough TQ. My mickey T drag radials are only 9.5", gonna go with 10.5"s when they wear out. I prefer these over the BFG's, those are junk imo.
Im assuming that was on 12 PSI?

What size rims are you running the drag radials on?

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rustbucket
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Yeah, boost was 12psi, I think my tire pressure was 15 psi. . .maybe. Its been over a year since I ran that. Rims are 16" off a 98 v-6 mustang. OAT was about 45 degrees.

ice_man152
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I saw earlier in the thread that some of you run up at norwalk? Are we talkin norwalk ohio or norwalk va? We usually take our drag car up to norwalk ohio for evo sti shoot outs n the dsm shoot outs.

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Shocker
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ice_man152 wrote:I saw earlier in the thread that some of you run up at norwalk? Are we talkin norwalk ohio or norwalk va? We usually take our drag car up to norwalk ohio for evo sti shoot outs n the dsm shoot outs.
Norwalk ohio.Screw that, I tired to talk Buschur into letting I6's into his competitions lol he wont have it.


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