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#1
05-25-2003, 09:15 PM
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What Turbo Should I Get?
I have an 1988 Supra Turbo. What turbo should i get an T-66,T04E, or a SP57. I had a T3/T4 turbo. Well after an long thinking peroid when the head gasket blew i said i'm going to go with an bigger turbo. With the time the car is going to be seating . So i taught I'm going to replace the whole motor do it all my self. I had ported and polished a head before the head gasket blew for my car. But I'm going to have time and money to put into the whole car. So I'm going to go with a bigger turbo. What should i get for street racing and at the track. I will have all the mods for it soon.
Thanks K&N FI Pk HKS blowoff valve Magna spark plug wires 550cc Injectors (If i go bigger turbo i might go with 720cc) T3/T4 turbo (i'm going bigger) Turbo elbow Spearco Innercooler Hks exhaust & test pipe and Down pipe No cats Exaust cut-off fuel pump and manual pressure regulator Lexus/REMI air fuel management system Clutch Master stage 3 Fluidine radiator Greddy boost controler Gauges to monitor everything Eibach Springs KONI Struts 
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#2
05-25-2003, 10:14 PM
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Well, are you using stock internals? You might want to consider upgrading your rods and pistons before you get a higher flowing turbocharger like a T66 or a T04E...
__________________
 Connor - Porsche Nazi since 2001, VW defiler since 2004  This here's a Fabrication forum!  My lugnut requires more torque than your LS1 makes.
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#3
05-25-2003, 10:23 PM
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I'm going to when i replace the whole engine. JE pistons 20 thousands and maybe Crower Billet rods.
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#4
05-28-2003, 11:35 PM
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might as well do it now, becuase there's not going to be much boost to play with on a bigger turbo and stock internals.
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when in doubt, throttle.
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#5
05-28-2003, 11:55 PM
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Rebuild the heads (valve assemblies, cams, gaskets, timing gears upgrade?, etc), also get racing pistons while you are at it, and new piston seals.
The worst thing to do to your engine is to give it too many horsies then it can handle.
__________________
......or if your a loser who drives a Civic with a type R sticker, racing stripes, blasting really bad rap music through your suburban area with your pretentious "I’m 21 but I’m still in high school girlfriend" while driving with your hand up on the top of the steering wheel exposing your underdeveloped pasty white vitamin deficient arm and wearing your backwards BS upside down visor hat while feeling the tacky as a "Florida vacation" single diamond earring in your ear, If you are this person...with any luck the sun in its precise celestial positioning as you putter on by...will reflect its scorching rays into your earring, bouncing intensely in your rearview, and finally making contact with your eyes through the thin cheap lense of $5 gas station Oakley rip off glasses.. then burning your retnal cones into smoldering melting gobs of ocular material as you are blinded by the purest form of energy in our known universe, and as you scream no one can help or hear you because they don’t know what’s going on since the weed whacker sound of your shitty tiny little muffler which makes the Civic sound like a 747 rages on underneath making everyone turn at disgust and comment to thier husbands or wives how much of a dickweed you are by attaching that automotive abnormality to your stock economical daily driver engineered by Japanese Automotive specialists to fit the needs for entry level business workers in their early 30's, however your pathetic looking $11,000 car which you want to look like a friggin spaceship with redundant ground effects is now out of control since you are blinded, and as your car plunges off the side of a cliff while you scream in the purest form of terror while knowing you have lived a horrid excuse for a life, by doing the bare minimum in every facet of existence, while getting fired from one pathetic job to another, the majority of your time spent slacking smoking dope, getting kicked out of school, polishing your "game" on sweet innocent underage girls you eventually 'de flower' through exhaustive yet succesful attempts to get the date rapist drugs you have stashed in the glove compartment, into your poor victims drinks while offering them to take the "Pepsi Challenge" while making your mother hate you, and your poor father who wishes he had a daughter instead of your pathetic ass, since a girl would be more of a man than you ever were, like the occasion when you were hit in the arm by a wild pitch in little league, then you cried like a fat kid who dropped his ice cream cone, I'm already envisioning you impacting the rocks below, in a spectacular fireball ignited from the residue hairspray from your girlfriend plastered in the fabric passenger seat, blinded by your earring, deafened by the loud "Bling Blingin", and I will smile and roll around on the ground in orgasmic delight while you are consumed by flames whose intense heat and fury will liquefy your bone marrow that I will use to make jelly beans out of and eat them happily at your funeral as midgets dressed like Alex 6005321 from "A Clockwork Orange" dance around your coffin to loud industrial style techno music and strobe lights, and I will sleep soundly at night knowing another successful conquest of Darwinism has been attained.
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#6
05-29-2003, 07:05 AM
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Depends what you're using it for
out and out Racer or Race/Daily Driver - "a/r stands for area / radius on the turbine side of a turbo. area being the area of the turbine inlet and radius being the distance from the center of the turbine shaft to the center of the turbine inlet. changing this property affects the spool-up and overall flow of a turbo. lower a/r generally reduces spool-up and maximum flow of a turbo." - From mkiv.com There's a Fluid flow equation and theory from Engineering Mechanics that says part of the above statement is inaccurate the equation is pAV is the mass flow rate. since the fluid is compressible (or air this still should apply) then Mass flow rate is constant. p1A1V1=p2A2V2 A being area and V being velocity P being Density. I think its just the wording so whatever. The A/R ratio basically tells you when the boost will start. The bigger the number the bigger the size of the housing it can also mean that should it be too big a large amount of lag may result and waiting for it to spool may taking an iceage. There's the other problem too the smaller the number the smaller the exhaust housing. Smaller numbers result in a greater velocity of air. If you decrease the size of the exhaust housing on the turbo (affects A/R Ratio) then Velocity increases. If you increase the size velocity decreases. The only problem is an increase in velocity of the air can result in surges in power delivery and it chokes of the air at higher RPM's. Wastegates dump excess Exhaust but should a turbo be too small it might be dumping exhaust all the time and result in lack of efficiency. You need to find a nice compromise between the velocity and Lag. Turbonetics seems to think .82 is good for street and track applications. You can always try to compensate for lag in the way you drive. Anti-Lag systems or for rally drivers only cuz they screw up your turbo. " T66: Capable of making 600-675 rwhp, the T66 is a bigger turbo yet, this is probably as big a turbo as I would recommend for the street, it makes full boost right around 4250 rpm on most cars, a significant amount of lag, but not horrendous... (full boost being 1.5-1.6 bar) This is a very common turbo, and a nice setup for drag racing with some street driving. " source Mkiv.com T04E is a Garret turbo right? and the other i have never heard of. http://www.turbocharged.com/catalog/t4.html various parts for the T04E SP57 Complete Turbo Kit More (Large) Pictures ITEM # SP57 Kit The SP57 turbo kit is perfect for stock fuel systems & offers one of the quickest spooling turbos on the market. This kit includes: SP57 Turbo, Ceramic Coated with a Polished Housing Mild Steel (not Stainless) Header, Ceramic Coated HKS GT Wastegate - Simply the Best HKS Racing Type 2 BOV - Again, the Best 4" Powder Coated Mandrel Bent Intake Pipe with Bracket 4" K&N Air Filter Ceramic Coated Midpipe Full Length Downpipe, Ceramic Coated 3" Intercooler Piping with BOV Flange, Powder Coated All Fittings, Hoses, Bolts, Lines, Filters, etc. Included source http://www.mvpmotorsports.com/Templa...211&SearchYN=N I'm not sure how reliable that website is. They also seem extremely pricey T51R Kit sounds a bit expensive since i know where you can get the T51R turbo for 2500 but whatever. I think thats an odd choice of turbo's the SP57 isn't in the same sort of range as the T66 the SP57 does less than 500rwhp according to MVmotorsports. If you want to makesure you're the fastest at a track you might want to get the T66. You also need a fuel delivery system that can cope with such a large load upgrading the injectors is a good start but you might also need a better fuel pump and a better engine management system to cope with it. You also should have something to check for Knocking. You don't want to spend a lot of money for it too all go wrong.
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Qualified Automotive Engineer 
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