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May 22nd, 2005, 02:40 PM
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Need Launch Help!!
My '87 GN has a PT52 turbo at 17-18 PSI, PTE front mount, 2800-3000 stall conv., stock suspension and vaccum brakes, etc.
Went to the track last night and could not launch at all!! Footbrake and throttle to the floor only building 4 lbs of boost. Getting like 2.4 60'(I know sucks bad!!!!!) Will a boost controller solve my spool up woes? When i let the brake go at full throttle the car goes a little and then finally builds boost and takes off. My MPH is OK but ET is ****! Seems like the stock wastegate Sol. is killing my spool up, bleeding the pressure off. This soumd right to anyone? Already ordered a MBC. Help!!     
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May 22nd, 2005, 03:49 PM
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Boost controller
I do'nt know if a boost controller will solve all your problems but it should help alot. Your converter may be a bit tight for that turbo. Good luck.
__________________
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, Direct Scan, 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 22nd, 2005, 06:42 PM
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sounds like my problem
That 60 ft. is brutal if the car was tuned pretty well. I had the same problem with my hybrid. The convertor was just way too tight, with a TA 49 and 36 lb injectors. The car would not get into the 12's cuz my 60 ft was 2.2. I have an art carr now but its not installed yet. I did a lot of brain picking before spending the money and everybody I talked to said u cant go wrong with a 9" lock up. The car should 60ft at least 1.75 now on a drag radial or slick.
__________________
The Widely Accepted and Riegning "Peoples Champ" in the state of Illinois, as stated by Dr. Boosts Girlfriend!  Man was he mad when he heard that!
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May 22nd, 2005, 08:13 PM
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I have a PT54 and a 3500 stall converter. When I used that turbo with a 2800 d5, my car 60 footed in the 1.9 range with slicks and foot brake. After I went to the 3500 9" I go 1.6's all day and even did a 1.5 Friday. This is leaving with only 5-6# of boost.
I say try a looser converter.
__________________
Kevin Bolger  '87 Turbo T 9.83 @ 138.56 11/3/07 Engine, V1 intercooler and transmission by Extreme Automatics http://extremeautomatics.com/ Also thanks to Kip at Excessive Acceleration #4 in TSM points series for 2007 Quote:
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May 30th, 2005, 02:27 PM
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I have a TA49 on my car and a PT52 on another car that I tune the PT52 spool's just as fast as the TA49.I would hold off on buying a converter and find out what is wrong with your tuneup,or combo.
__________________
87White turbo T,Stage II,GN1's,Champion Ported stock lower,Hyd Roller,Atr Headers & Down pipe,Delta Race gate, 70 p trim, 72 lbs injectors,Percision upper & 65mm TB,old school KB front mount for now,areomotive fule pump,ADJ Fuel pressure reg,big mouth cold air kit/with KN FILTER,volt booster,progressive alcohol injection, scanmaster, heated o2,GNX dash,Maft Pro,ECM done for the 72lbs injectors,Type II coils&module,accel300+wires,centerline telstars,nitto drag radials/hooker 2 1/2 cat-back W/ aero chambers,metco uppers&lowers,hotchiks trailing arm braces,auto meter EGT gauge,griffin aluminum radiator,3400 9x11, converter Hope it go's 13's now.72 Big Block Nova,83 Firebird 468 BBC.
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May 30th, 2005, 04:40 PM
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I also think you need to troubleshoot your combo. I have a TA49, blues and a V4 and my car 60s in the 1.7s with the stock D5 converter and about 5psi boost at launch. Find out why your car will not build boost with the foot brake and you may have solved your problem.
__________________
Ray K 1987 WE4 Orlando, FL
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