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#139: so close to a 10.


NateCrisman
Fisheye Hoodpins
418/2000


Galant VR-4 org Post #: 837922 posted 10/07/09 10:32 PM     Remind Me!  Send Private Message   Edit Post      
Went to Island tonight with #139 tonight for Test&tune hoping to break into the 10's:

100# lighter, on racegas, with bigger springs in the tial wastegate. I did not get time to make that 4" intake pipe so I just ran it with open turbo & missing headlight.

Total weight was about 3060lb. Boost was still dropping off to 24psi. I must have some other issue, maybe a leak in the piping.

Anyway, here are the runs:

11.523 @ 122.00 1.721 had tires set to 30psi, I spun then hard and let off in first gear. boost was at street setting of 25psi

11.732 @ 120.81 1.763 Tires down to 17psi, dead hooked and bogged the launch.

11.329 @ 121.72 1.549 good launch, early 1-2 shift at 7000. Boost spiking to 26, setting down to 24psi.

11.104 @ 123.36 1.492 Awesome launch @ 6600rpm. not a hint of spin, the car just took off. all clean gear changes with the throttle down at about 7800rpm. Boost hit 28 for a little bit in 3rd then went right back down to 25. I'd guestimate that 75% of the run the boost was under 25psi.

Fifth run I got an even better launch, but broke the drivers rear axle inside the outer CV boot midway through first gear. The car came out even harder, Id bet a mid 1.4 60'. I left at 6750rpm with about 14psi on 2step. I had raised the boost controller, added 2* more timing, and leaned out the AF a bit more for this run too hoping to see a 10.xxx.

That 11.10 moved me up to #9 on the DSMtimes GVR4 list. Cool and all to break into the top 10, but I really wanted that 10.xxx. Damn

So, while I still think the car had a 10 in it for the night, there is still something wrong in the boost control setup. Seems increasing the duty cycle on the AEM controller gives me a bigger spike, but it always settles down to about 24psi at high rpm. I'll have to do a leak test asap. Increasing the spring pressure in the Tial external from 1.0 to 1.4bar seems to have changed nothing.

Air temps were also not very good, starting in the 60s at the line on most runs and getting past 115*F at the traps, about 55*F gain in temp! That's pretty bad, Im starting to suspect the fmic core is holding back quite a bit of power and am suspicious of it being part of the boost drop issue.

I think Im going to try and make some graphs of the boost and rpm logs, post, and see what others think.

ACT250R came out and made some videos for me, Ill try and get them uploaded to youtube tomorrow. He was a super help and good advise the whole night. Thanks.

Drove the car home from the track with the broken axle all contained in the cv boot. Made it home without issue. I love welded center diff



GVR4 #418/2000: [email protected] - pump/alky -
GVR4 #431/1000: [email protected]+
GVR4 #139/1000: T3T4: [email protected] - 14B: [email protected] (sold)

www.PerformancePartout.com


Edited by NateCrisman (10/07/09 10:34 PM)

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SleepinGVR4
What are we going to do today Ferb?
629/2000


Galant VR-4 org Post #: 837925 posted 10/07/09 10:48 PM     Remind Me!  Send Private Message   Edit Post      
Very Nice



Sean

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Garfield Wright
Unregistered


Galant VR-4 org Post #: 837927 posted 10/07/09 10:52 PM     Remind Me!  Send Private Message   Edit Post      
Man what a difference a good driver makes. With what you have in it you're 10's in my book

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vapid
"Private" clan, pivot man
674/1000


Galant VR-4 org Post #: 837992 posted 10/08/09 07:18 AM     Remind Me!  Send Private Message   Edit Post      
Quoting SleepinGVR4:

Very Nice



+1



"Those who hammer their guns into plowshares will plow for those who do not."

-Jefferson

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crankwalk
Unregistered


Galant VR-4 org Post #: 838041 posted 10/08/09 11:08 AM     Remind Me!  Send Private Message   Edit Post      
11.1 at 123 is great. Those 1.4 60 fts are helping out nicely! Suprising you havent broken an axle sooner than that though.

You don't have meth/water injection do you? You might just be at that point where you need to have that extra push to cool down the charge temps.

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NateCrisman
Fisheye Hoodpins
418/2000


Galant VR-4 org Post #: 838158 posted 10/08/09 04:20 PM     Remind Me!  Send Private Message   Edit Post      
Water/meth...no I don't have either. But I do have a n2o injection kit stashed away that would lower the charge temp even better.

After reviewing logs, this 123.3mph in racegas was at less overall boost than the 120.9mph on pumpgas with just about the exact same curve of boost dropping off with rpm. I'm starting to thing this XS Power fmic core is the next thing in line to be replaced (well after the axle of course). I don't have the Instrumentation or the time to correctly figure out pressure drop and temp diff accross the core, so it would simply be a swap & see kinda mod.



GVR4 #418/2000: [email protected] - pump/alky -
GVR4 #431/1000: [email protected]+
GVR4 #139/1000: T3T4: [email protected] - 14B: [email protected] (sold)

www.PerformancePartout.com

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atc250r Galant VR4.org Moderator
Senior Ricer
1552/2000


Galant VR-4 org Post #: 838170 posted 10/08/09 04:48 PM     Remind Me!  Send Private Message   Edit Post      
I wouldn't be surprised if that core is at its limit. Glad I could be of help Nate, you've forgotten more about making a 4G63 go fast than I'll ever know. I'll be asking for your help when its time to get DSMap going in my car.

John



"...if they're so into masochism, they should just really go all out and start modifying Mitsubishis. And using them as daily drivers." - Mike R.

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BoostedAWD91
Senior Member
815/2000


Galant VR-4 org Post #: 838210 posted 10/08/09 06:45 PM     Remind Me!  Send Private Message   Edit Post      
very nice nate! i think im gonna switch to dsmap as well this winter. i just cant get my car to run right with the vpc/gcc setup. some days it runs great and others it runs like crap



#815/2000- Lexus Pearl White


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RedTwo
Rangi Kiwi


Galant VR-4 org Post #: 838216 posted 10/08/09 06:59 PM     Remind Me!  Send Private Message   Edit Post      
Bloody hell... I think you need some racing stripes. You can't be fast without racing stripes!

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turbofonz
Member +
255/1000
153/2000
369/2000
490/2000


Galant VR-4 org Post #: 838255 posted 10/08/09 09:27 PM     Remind Me!  Send Private Message   Edit Post      
Jeez, VERY good driving!

123 mph and LOW 11's... don't see that with dsm's very often.



Ryan W.
91 TSi AWD - 9 sec stock bottom end and corn fed
91 Galant VR-4 - Summit White - 153/2000
91 Galant VR-4 - Summit White - 490/2000
91 Galant VR-4 - Nile Black - 369/2000
92 Galant VR-4 - Summit White - 255/1000 - [email protected] - sold

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Brianawd
Higher Launch RPM
439/1000


Galant VR-4 org Post #: 838290 posted 10/09/09 12:31 AM     Remind Me!  Send Private Message   Edit Post      
Not much I can say but



1992 Gaylant vr4 #439/1000
11.1at131 562awhp/484awtq
E85 FP3052 parted out
05 EB EVO SSL 11.48at124mph
450awhp/400awtq New 2.3 e85 hks 7460r
05 JEEP liberty CRD DD/ski slut
200hp/385tq


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Woody
Junior Member
164/2000



Galant VR-4 org Post #: 838313 posted 10/09/09 07:10 AM     Remind Me!  Send Private Message   Edit Post      
Now thats driving, on a stock block. Very impressive.

Posts: 88 | From: Plainfield, NJ | Member Since: 02/09/09 | IP: (173.3.84.249) | Report this post to a Moderator

onesickcrx
Brother of the Year
449/2000



Galant VR-4 org Post #: 838314 posted 10/09/09 07:10 AM     Remind Me!  Send Private Message   Edit Post      
Really great numbers :dthum:

How is driving the welded center diff around town? Do you still consider it to be a street car?



Lack of boost

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Ian M
waiting for the bus
487/2000


Galant VR-4 org Post #: 838493 posted 10/09/09 03:52 PM     Remind Me!  Send Private Message   Edit Post      
Right on! Impressive.



#487/2000 Summit White

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BOOSTIN HARD
Unregistered


Galant VR-4 org Post #: 838519 posted 10/09/09 05:19 PM     Remind Me!  Send Private Message   Edit Post      
Quoting NateCrisman:

Water/meth...no I don't have either. But I do have a n2o injection kit stashed away that would lower the charge temp even better.

After reviewing logs, this 123.3mph in racegas was at less overall boost than the 120.9mph on pumpgas with just about the exact same curve of boost dropping off with rpm. I'm starting to thing this XS Power fmic core is the next thing in line to be replaced (well after the axle of course). I don't have the Instrumentation or the time to correctly figure out pressure drop and temp diff accross the core, so it would simply be a swap & see kinda mod.




Very nice times. I think I have the same core as you do and I haven't had an issue with it yet. Are you thinking that the pressure drop is just too much? I'll will see if I can dig up any pictures of mine.

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turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 838528 posted 10/09/09 05:45 PM     Remind Me!  Send Private Message   Edit Post      
Quoting Ian M:

Impressive.




QFT



-Mark

A face only a grocery shopper could love.
1051

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Dbossman
Unregistered


Galant VR-4 org Post #: 838535 posted 10/09/09 05:59 PM     Remind Me!  Send Private Message   Edit Post      
Very impressive.

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2of9
Hellaflush
808/1000


Galant VR-4 org Post #: 838587 posted 10/09/09 09:33 PM     Remind Me!  Send Private Message   Edit Post      
awesome numbers! 11.1 at 123 trap! that is flippin sweet.



#808/1000
Team Nines DSM Specialist

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Mark
Trying To Sell Out


Galant VR-4 org Post #: 838652 posted 10/10/09 01:52 AM     Remind Me!  Send Private Message   Edit Post      
Awesome good job sooo close..

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charmcity
keeping yawll posted
357/1000


Galant VR-4 org Post #: 838657 posted 10/10/09 02:58 AM     Remind Me!  Send Private Message   Edit Post      
very impressive... Keep up the good work.



I wonder what 40psi feels like?

Official jackstand Baller!!!

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NateCrisman
Fisheye Hoodpins
418/2000


Galant VR-4 org Post #: 839039 posted 10/11/09 08:42 AM     Remind Me!  Send Private Message   Edit Post      
Thanks for all the props everyone! Really appriciate it.

Streetcar; totally. I drive it to & from the track and cruise around with it running errands in town. Currently it's a little rough with a few dumb thing to fix up before the car is ready for everyday driver duties: need to fix broken exhaust, get a straight alignment, and I'm considering getting new stock trans and tbelt side engine mounts to rid some vibration. Rear kid seats need to go back in as well. It has current reg/ins/inspection sticker.

I think I have decided to enjoy driving the car all winter (but it gets garaged during snow salt) with springtime sound the rollbar, race seat, harness, major weight loss, and adding my nitrous kit. Think I'm going to try running [email protected] on stock shortblock. Should take about 75-100 shot on top of current configuration. Nitrous usually adds an unusually large amount of ET compared to MPH, so I think putting a 75shot on the car would take my [email protected] and make it a [email protected] Not sure how long a stock headgasket with basic ARP's is going to hold that?

Welded diff: I have put one in nearly every dsm iv owned, it doesn't bother me at all. It really sucks if you take out power steering, and makes autox sketchy. But it's cheap, strong, and adds major dragstrip traction. On the street the only difference is a bit of tendancy to oversteer In rain in really tight corners.

WOP: What does QTF mean? (I fail at Internet!)

Brian: Dude how can you resist those qtp's calling your name in the garage? Instant 10.5! DO IT!

Race Stripes: Ehhhh. I'll pass. One thing I have been neglecting has been the exterior upgrades. Have precut tint sitting hereready to install. Green vinyl to cover the chrome strip. Paint taillights. Swap grill. Straighten the front bumper, clean cuts, new brackets. Want to make the car as clean/smooth looking as possible, but cosmetic work always takes a back seat to spending time on performance and mechanical issues. Someday it will look just right.

Going to make another attempt to nail a 10 on Oct 23. Going to add the 4" cold air intake, boost leak check an try to figure out the boost drop issue. Don't really see being able to hit consistent 10's on driving alone, iv got to pick up some power and I think getting the boost to stay up at higher rpm should be the #1 goal for that.

As for the FMIC: I'm seeing really poor air temps post ic, most of last wednesday's runs I would see gains of 45-50*F from starting line to traps. When I was running the 4" thick garret core on my evo8, the temp gain going down the track was real low, like 15* or something (I posted that data in a previous dragstrip results thread here, gotta go look). Seems the temp gain has gotten worse, which could indicate a boost leak. I still feel there is some big power to be gained in swapping the xspower core for the same size Garret core, as one would hope to expect going from a $200fmic to a $1000fmic. Question is: do I want to spend that money



GVR4 #418/2000: [email protected] - pump/alky -
GVR4 #431/1000: [email protected]+
GVR4 #139/1000: T3T4: [email protected] - 14B: [email protected] (sold)

www.PerformancePartout.com


Edited by NateCrisman (10/11/09 09:08 AM)

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Andy_S
Overcomplicated


Galant VR-4 org Post #: 839056 posted 10/11/09 10:15 AM     Remind Me!  Send Private Message   Edit Post      
QFT = Quoted for Truth



I found v8's...

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NateCrisman
Fisheye Hoodpins
418/2000


Galant VR-4 org Post #: 839077 posted 10/11/09 10:44 AM     Remind Me!  Send Private Message   Edit Post      
Air temp data from 2005 on my evo8:
Quote:


AIT is measured directly after the fmic:

At 31psi with the BR Race FMIC (garret 24"x12"x4" core) , ambient temp is 60*F. Starting line AIT is 71.6*F, top of 3rd temp is 75.2*F, end of 4th gear temp is 86.6*F.
That's a temp gain of 3.6*F in 1-3 gears and 15* in 1-4 gears.

2 Weeks ago at Island Dragway:
At 30psi with the stock evo8 fmic, ambient temp is about 78*F. Starting line AIT is 91.4*F, top of 3rd temp is 131.0*F, end of 4th gear temp is 138.2*F.
That's a temp gain of 39.4*F in 1-3 gears and 46.8*F in 1-4 gears.

This is an incredible change in AIT. The AEM logger was showing about 420whp with the stock fmic at 30psi in 3rd gear. The same math shows 480-490whp at 31psi with the new FMIC, granted there is a 18*F change in ambient temp that helped some. That's a solid 60-70whp gain from the combination of 1psi of boost, 18*F of ambient temp, and the FMIC. The 6+mph gain in trap speed indicates the ems logger is atleast somewhat in reality.





Seems at only 28 to 24psi on a 50trim turbo, the current fmic core on my car (XS Power 24x12x4") My air temps are just about as bad as I was seeing on the Evo8 with stock fmic/GT35R running more boost! Really, if that core was worth even 3mph at this stage, it would put me solidly into the tens.



GVR4 #418/2000: [email protected] - pump/alky -
GVR4 #431/1000: [email protected]+
GVR4 #139/1000: T3T4: [email protected] - 14B: [email protected] (sold)

www.PerformancePartout.com

Posts: 2054 | From: Blairstown, NJ | Member Since: 11/22/08 | IP: (76.6.50.229) | Report this post to a Moderator

crankwalk
Unregistered


Galant VR-4 org Post #: 839111 posted 10/11/09 11:55 AM     Remind Me!  Send Private Message   Edit Post      
I would do a nice meth kit. $1000 ic cores just aren't necessary when you can put on a meth kit, stay extra cool and not have to reconfigure piping as well.

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Barnes
Firechicken
908/1000
237/2000


Galant VR-4 org Post #: 839115 posted 10/11/09 12:09 PM     Remind Me!  Send Private Message   Edit Post   
But wouldn't you say a meth kit would be a band aide fix in that case?

I wonder what kind of pressure drop the PowerXS core causes. If it is as much as it appears in Nate's case, that is a huge lose of HP. Again, it would be worth buying an expensive core if it has much lower pressure drop. Even if an IC lowers temps well, a large pressure drop is just wasted horsepower.



-Jon Barnes
#580/2000 (Long Gone)
#908/1000 Black (Sold)
#237/2000 White

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