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May 21st, 2005, 12:51 PM
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1/4 times with GT3255
If you look at my sig. you will see my mods. After 2 times at the track and almost ten passes, my best time is 13.4 at 100mph and only with a 1.8 60' with the Mickeys. I keep turning the actuater for more boost and I don't get knock, but it does not change my time. Do I need a bigger turbo or are there some more simple things I can try first to improve my time?
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112     
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May 21st, 2005, 03:48 PM
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What did you run before you put the turbo on? What boost are you running before and now? Maybe you have an exhaust leak.
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87 TurboT--GT6131, 60lb injectors, Precision sl intercooler, Hooker cat back exhaust, THDP, home made Big Mouth, pp, 62mm tb, adj fr, Walbro 340/hotwire, AlkyControl kit, Turbo Tweak 93+alky chip, HR lower control arms, air bags, ATR bar, best et 11.79@113.86 http://s64.photobucket.com/albums/h1...secondpass.flv
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May 22nd, 2005, 11:02 AM
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My guage reads 20-22PSI steady the whole way down the track with 5 gallons of 100 octane mixed with 1/4 tank of 93. I have very little to no knock on my caspers guage, however I did not have the Direct Scan plugged in for a more accurate reading. I never ran it with the stock turbo and there doesn't seem to be an exhaust leak but I won't rule that out.
What kind of times should I expect with my current set up because my MPH seems kind of low?
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112 Last edited by darkred87T : May 22nd, 2005 at 11:06 AM.
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May 22nd, 2005, 11:24 AM
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I have no experience with the GT3255 but I would think something is out of tune since a stock turbo should be at least that fast. I'd start with the basics of the spring cleaning just to know your ok with that. I don't know about stock injectors for that turbo, you might want to up those some. You don't mention a chip either. That might be worth looking into. Made a huge difference for me. Are you using a Scanmaster or just the knock gauge for now? That Direct Scan would give you a more complete picture. Oh, I just noticed you have stock exhaust in you signiture. If that is what your running I'm sure that's holding you back.
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87 TurboT--GT6131, 60lb injectors, Precision sl intercooler, Hooker cat back exhaust, THDP, home made Big Mouth, pp, 62mm tb, adj fr, Walbro 340/hotwire, AlkyControl kit, Turbo Tweak 93+alky chip, HR lower control arms, air bags, ATR bar, best et 11.79@113.86 http://s64.photobucket.com/albums/h1...secondpass.flv
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May 22nd, 2005, 01:31 PM
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Oh, yeah forgot to mention I have a stock exhaust with a test pipe. I changed my Sig.
I did the spring cleaning, everything is new. It does have an idle issue, but doesn't seem to effect it after idle. I did run it in the 1/4 once with Direct Scan and it did not show anything unusual. I also have a chip burned from Dynotech. I was considering bigger injectors, but I don't see how that would make me faster in the 1/4 at this point if I am already running over 20PSI boost with no knock. 
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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May 22nd, 2005, 03:09 PM
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Thanks, I'll try a bigger downpipe next. I heard there is also an inlet mod for the intercooler?
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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May 23rd, 2005, 11:07 PM
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With the turbo, gas and boost that you say your running, you should be doing more than 100 mph. I'd say that before you go putting more go fast parts on, fix what's wrong. I dont know the altutude of your track but, IMO that sled should trap at least 104. Maybe you've got a sliping trans? I'd start with a scanmaster and check everything out.
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87 GN New Czarnota "special  " roller motor, coming soon to a drag strip near you. Champion cnc irons, Limit TA-61 hair dryer, V4 int/ hand warmer, 60 lbs. squirters, crosswired 340, THDP, Kenne Bell air canister (used as office trash can), Poston's headers, Cotton's s/s exhaust, disemboweled feline, Razor's alky, TT chip, MH Big Mouth air intake, Impalla ss MAF with trans, AC 9" non LU conv, Len Freeman gear box, stage wrong trans brake, 373 gear, Viagra axles, air bags, boxed LCA, 275-60-15 MT DRs, scanmaster, tune and combo inspiration By Brutal-6 Racing. Thanks Neal and Morgan.Also, about $3000.00 worth of other junk that I'm too ashamed of or not mentioning.
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May 25th, 2005, 07:51 PM
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Herre is my best time slip from last Friday:
R/T .622 60'......1.894 330.....5.528 1/8......8.578 MPH.....80.78 1000....11.220 1/4.......13.473 MPH......99.72
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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May 27th, 2005, 11:13 AM
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Just checked out my brother's early timeslips with his GN on www.turbojimmy.com and his 13.3-13.8 second runs were consistant with 100mph trap speeds.
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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May 27th, 2005, 10:45 PM
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gt3255
my dads car with pump gas alky and 21-22lbs ran 7.96@ 88mph in the 1/8th....stock elbow and old 0-60 3 inch dp with big neck ic....surely a dp an big neck arent worth 8 mph and over half a second in the 1/8th...
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1987 GN 1986 GN 10.18 @ 138 109 motor (not a full pass)  2005 Brute Force 750 2004 Kawie 700 Prairie 10.30 in the 1/8th 2004.5 Duramax runs low 9's in the 1/8th 1989 TTA #1406 sold 1987 Limited Daily driver GSCA# 5705
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May 28th, 2005, 06:35 AM
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maybe
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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July 20th, 2005, 11:15 PM
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Something is not right? I have the GT3255 on my car with a big neck stock intercooler, Bluetops, THDP and of course of of the common fuel mods, K&N etc. At 25lbs of boost in 100 degree heat with the dump open running 7.60's.
Here is one slip R/T .575 60 ft 1.65 1/8 mile 7.61 @ 88 mph Have not ran the 1/4 yet.
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David N. 86 GN 11.72@114 mph 1.60 60ft 08 Saturn Sky Redline Turbo Intercooled 05 Rainier V8 (GN hauler) Beauty and the Beast either way you look at it.  
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July 21st, 2005, 09:04 AM
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I agree something is not right. I have a GT3255 on my TTA, with only other mods 50s, KN, and a gutted cat. The car went 108 at 18lbs on 100 octane. That was my first time out with it too. I think my car is rich down low. So I had problems building boost. Launching with 0 boost the cars best ET was 12.86 w/ 1.99 60'. With 20+lbs you should be at least 12.50-12.70 range. And that is being very conservative. 12.0-12.2 more like it with a good 60'. I will post back once I get back to the track.
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July 26th, 2005, 08:58 PM
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Ditto on something not right.
my car went 13.46 with 2.16 60ft. Only mods were fuel pump, K&N, open exhaust. 20psi on 20* street chip.
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Glen 1986 GN- Garage Art.  
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July 26th, 2005, 09:14 PM
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I just upgraded to 60lb. injectors, Extender chip, TH 3" downpipe and a Hooker cat back. It runs 100% better on the street and I'm going to the track with it this Friday. I'm sure it will do better this time and I'll keep ya all posted.
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112 Last edited by darkred87T : July 26th, 2005 at 09:16 PM.
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July 27th, 2005, 12:06 AM
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Godd luck and I look forward to your results.
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John Wilde 86 T Type Blue - Driver 86 T Type Black - Resting 87 GN Back Halved - Sold
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August 11th, 2005, 05:57 AM
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Not yet, it's been pretty hot and humid around here lately so I haven't bothered. If the weather breaks I might go tommorow night.
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1987 Regal T. Dark Red Metallic w/ Burgundy GT3255, #60's, LS1 MAF, Translator +, CAI, Walbro 340 hot wired, Ramchargers dual fans, 3" THDP, 2 1/2" Hooker cat. back, CAS V4, PAC, RJC power plate and boost controller. 12.0@112
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August 26th, 2005, 10:15 PM
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Well, I got another night in at the track. The first two runs were with 94 octane and 20 PSI and I had to let off out of the hole because of knock. I bought some 104 Octane to mix with the 94, turned the boost down to about 19PSI and got a 13.1 at 102MPH. Also, the Transm |
