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January 22nd, 2008, 09:10 PM
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How long can I get by running 25psi ????
Ok, so last weekend I went for a drive and the car was running great. It feels stronger than ever, of course it's freakin cold out. So I turn it up to 25psi, with no knock...How long will this unopened motor take that before it goes
 ? 34K miles, and I've "enjoyed" the car if you "know what I mean" My bro says to turn it down to 23psi for longevity, but I'm greedier than Scrooge when it comes to no knock efficient boost.Well?
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89 TTA -first and original owner, 34k miles. www.my89turbotransam.com BB CPT-61, THDP, 60# inj., Electronic dump pipe, SMC Alcy Inj. stock exhaust from cat back. 
    
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January 22nd, 2008, 10:42 PM
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As long as there is no knock at all.... I would leave it alone. Just make sure you put zip ties on ALL vacuum lines and keep it a little rich. And dont get stupid with it. Should last a while. When people turn boost,fuel,timing up or down all the time they end up exploding shiot.
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January 23rd, 2008, 02:45 PM
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You need to have GOOD oil pressure and quality oil. IMO, it's just a matter of time before you spin a rod bearing (or two) at those boost levels. The car WILL spin rod bearings with just the slightest amout of knock. I've had first hand experience with this driving Bo's old car. (now his new car)
 I talked to Dan Strezo about these crazy boost levels and he said he would not run more than 20psi on a stock block. He's an old head buick guy and I take his advice seriously. 25psi is fun while it lasts though! 
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____________________________ Looking for an ASC GNX 028 dash plaque. Also two GM theft deterent labels. Last edited by hiballin : January 23rd, 2008 at 02:50 PM.
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January 23rd, 2008, 02:47 PM
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as long as no knock I'd go for it
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Dan don't run your mouth if you cant run your car  86/87 GN and 89 TTA .. tons of parts !! Time to get out! Stuff has to go !!! Otherwise I am cutting it up and throwing it away email ttastage2@yahoo.com
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January 23rd, 2008, 03:01 PM
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Quote:
thanks for input. 
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89 TTA -first and original owner, 34k miles. www.my89turbotransam.com BB CPT-61, THDP, 60# inj., Electronic dump pipe, SMC Alcy Inj. stock exhaust from cat back.
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January 23rd, 2008, 03:36 PM
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don't run over 20#'s on a stock block??? wtf! I'm going with grumpy on this one. I think if you aren't knocking I wouldn't get to worried, but I wouldn't keep turning it up much past that on a stock engine even if it's not knocking unless you don't mind looking at the crank in the rear view mirror.
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.020" Diamond pistons, Ported heads (206I/196E cfm) comp. 212/212 cam, 9.1:1 compression. Turbonetics 66BB, Modified BGC 23 row interooler. Razor's alcohol kit. Turbo tweak chip.
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January 23rd, 2008, 03:50 PM
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I figure that I need to run this bigger turbo up to 25psi to get the benefit of getting it. If I kept the TE44 then maybe I should only run 23psi, but it's my understanding that these bigger turbos need to be ran at higher boost levels to justify the expence. If I blow it up, then I guess it'll be a good reason to get the internals upgraded and port the heads/cam, so I can blow it again.
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89 TTA -first and original owner, 34k miles. www.my89turbotransam.com BB CPT-61, THDP, 60# inj., Electronic dump pipe, SMC Alcy Inj. stock exhaust from cat back.
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January 23rd, 2008, 06:15 PM
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25#'s of boost
I have run more than 25 #s on the street with no problem as long as there is no knock. But have one vacuum line pop off or split and you have problems, so follow the advice already given and zip tie the lines and make sure they are all new. I know from experience, I found out the hard way and all my lines were zip tied in place.
As long as everything stays in place and you have no knock then go for it, but there is no margin for error at boost levels 25 #s and above..
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1989 TTA #798, A few mods. It still knocks when warm. Soon to become an alcoholic. My Son's Car: 87 Turbo T, 204/214 cam, TE62, MSD 50's Chip by Eric @Turbo Tweak. Best ET 11.55 Best MPH 120.50 with a 2.10 60' with MT ET Streets. We are working on the 60' times. 2002 Dodge 2500 4X4. Yes, it has a Cummins.
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January 23rd, 2008, 10:42 PM
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As long as your alky is working fine you shouldn't have any problems and as long as your not pumping 25# for more than a few seconds on the street...by then you should have already blown the doors off most anything and then let up...provided you are seeing no knock, at those levels the motor cannot tolerate much. With various 61 series turbos I didn't have any more benefit of running anything more than 25# and I tested various ones from 20-28# of boost ...but with various exhaust housings and exhaust wheels you may find out differently, but with stock non-ported heads I doubt there will be anything worth the risk. Leave it at 23-25 and enjoy
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Rob LSPBC Newsletter Editor '87 Grand National Owned 17 years. 65#inj,HW 307, THDP,V4 IC, GT6131E, alky, no cat, Cold Air kit, Del-alum fronts, Gen2 T+ w/LS1 & LM1/LMA3 WBO2, JJ TB mod, 3000 PTS 9x11conv, Direct Scan, best 1/8th 7.23@96, best 1/4 11.61@119, 1.66 60' '79 10th Anniv. T/A 6.6 all original 4-spd '89 20th Anniv. TTA #426 stock, 15k miles. '99 30th Anniv TA #707 Conv 1 of 535 conv..rarer than a GNX. '95 Trans Am Conv LT1 w/LPE 211/219, LE2 ported heads/intake, and LTs/true duals '94 Silverado LT4 w/LPE 211/219. 
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January 23rd, 2008, 11:20 PM
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Quote:
Thanks for the reply!
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89 TTA -first and original owner, 34k miles. www.my89turbotransam.com BB CPT-61, THDP, 60# inj., Electronic dump pipe, SMC Alcy Inj. stock exhaust from cat back.
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January 23rd, 2008, 11:26 PM
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Whatever the turbo- no knock, good fuel= let the bodies hit the floor!
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Proud owner of a teeny lil' ol' v-6 that has a nasty tendency to STOMP on V-8s!! But, DAMN, is it fun!!!!!!!! project frankenstein under way..... "A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, pitch manure, solve equations, analyze a new problem, program a computer, cook a tasty meal, fight efficiently, and die gallantly. Specialization is for insects"
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January 23rd, 2008, 11:31 PM
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Quote:
__________________
89 TTA -first and original owner, 34k miles. www.my89turbotransam.com BB CPT-61, THDP, 60# inj., Electronic dump pipe, SMC Alcy Inj. stock exhaust from cat back.
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February 2nd, 2008, 12:30 PM
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As long as Ur willing to take the risk, go ahead. But don't kid Urself - there is a risk, as a number have found out. What U hope is that U just blow a head gasket - and with the puny 8 bolts that we have, that isn't difficult. Just because others have gotten away w it doesn't mean that U will. We're on the edge here.
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Lynn D. Brown finally back in SoCal '87 GN, '89 TTA, '93 Typhoon, '06 GTO
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February 2nd, 2008, 01:10 PM
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Run 'er hard....clean up da mess later!
__________________
Proud owner of a teeny lil' ol' v-6 that has a nasty tendency to STOMP on V-8s!! But, DAMN, is it fun!!!!!!!! project frankenstein under way..... "A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, pitch manure, solve equations, analyze a new problem, program a computer, cook a tasty meal, fight efficiently, and die gallantly. Specialization is for insects"
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February 2nd, 2008, 01:36 PM
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lots of good opinions here...I've had the same question for a while.....25# is a lot of fun...but I've since turned her down to 20# simply because I can't afford to break anything major at the moment
 .....I did however beat up a cobra pretty bad a few days ago...so 20# pretty fun too!
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My '86 Buick... http://s139.photobucket.com/albums/q295/jcawley3/Buick/ 120K stock block, stock intercooler, 4" big mouth CAI, 60lbs inj TT Alky chip to match, 340 walbro hotwired, translater, 3.5 MAF, SMC alky, 3" DP with cut out, GT6162 BB Turbo, Red Stripe converter  , powerlogger, scanmaster, RJC powerplate and boost controller, ATR exhaust no cat.......and now riding on MT DR's!!Check out my other 1986's http://www.correctcraftfan.com/diari...986&yrend=1986 http://www.correctcraftfan.com/diari...986&yrend=1986
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February 2nd, 2008, 02:06 PM
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Cars do break !!! it's not if they will break BUT WHEN THEY WILL BREAK!! we run "lotsa" boost on the street... IF your afraid of breaking it leave it in the garage
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Dan don't run your mouth if you cant run your car 86/87 GN and 89 TTA .. tons of parts !! Time to get out! Stuff has to go !!! Otherwise I am cutting it up and throwing it away email ttastage2@yahoo.com
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February 2nd, 2008, 02:49 PM
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My buick is pushing 520-550 hp stock bottom I drove it 2500@23psi I turd it up 25psi and only drove it 340miles spun a rod berring turn it DOWN!!!!!!!!!
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February 2nd, 2008, 03:08 PM
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I have been running 25-26 lbs with a GT67P, 60# and Alky for a year on a stock bottom end. Zero knock. I don't rack up much mileage, but I do make sure to keep an eye on the Scanmaster. I admit, you are taking a chance without bottom end support and stock head design, but it makes driving a whole lotta fun. You can blow up any engine at any power level with a poor tune. Just weigh the risks and live with your choices. With the Powermaster headaches I have had this year, I am more concerned about stopping this bullet rather than going any faster.
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Stupidity has a certain charm, ignorance does not. Frank Zappa Check out my White 87 Type T: http://community.webshots.com/user/wldwst Some examples of my right brain activity. http://robertwestcustomdesign.blogspot.com/ Last edited by WLDWST : February 2nd, 2008 at 03:28 PM.
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