Advice on detuning a Greddy T88 car
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Advice on detuning a Greddy T88 car
I have a chance to buy this car for a decent price.
13B Engine (Full Rebuild), Ported, 3mm Apex Seals, Power FC with Commander and MAP, 850/1600cc Injector Kit (primary/secondary), T88 Greddy Single Turbo Kit, Greddy Boost Controller, Boost Gauge, CC3 Intercooler, Turbo Heat Shield (OMP), CC3 Intercooler, Aluminum Radiator (Fluidyne), 3 ¾" Greddy Exhaust, RPS Clutch Package, 18" Wheels and Tires, Power Stop Brake Kit, 5 Way Adjustable Struts and Springs, Front and Rear Stab Bars. New: V-Band Connectors (exhaust), Plug Wires, Plugs and Coil, Engine Wiring Harness / Coil Harness, Coolant Temp Sensor, HKS Blow Off Valve
He doesn't have a dyno sheet but this seems to be a 500+ hp setup which is maybe 100hp more than I need. If I just set the max boost down to 15psi the single will give me a weak low end right?
Will a T78 swap in with no changes? These are a Mitsubishi turbo correct? Can I just buy a smaller Mitsu fan or were the Greddy units specially modified to fit?
Any thoughts?
13B Engine (Full Rebuild), Ported, 3mm Apex Seals, Power FC with Commander and MAP, 850/1600cc Injector Kit (primary/secondary), T88 Greddy Single Turbo Kit, Greddy Boost Controller, Boost Gauge, CC3 Intercooler, Turbo Heat Shield (OMP), CC3 Intercooler, Aluminum Radiator (Fluidyne), 3 ¾" Greddy Exhaust, RPS Clutch Package, 18" Wheels and Tires, Power Stop Brake Kit, 5 Way Adjustable Struts and Springs, Front and Rear Stab Bars. New: V-Band Connectors (exhaust), Plug Wires, Plugs and Coil, Engine Wiring Harness / Coil Harness, Coolant Temp Sensor, HKS Blow Off Valve
He doesn't have a dyno sheet but this seems to be a 500+ hp setup which is maybe 100hp more than I need. If I just set the max boost down to 15psi the single will give me a weak low end right?
Will a T78 swap in with no changes? These are a Mitsubishi turbo correct? Can I just buy a smaller Mitsu fan or were the Greddy units specially modified to fit?
Any thoughts?
#3
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The car is only running 10psi right now because of the break in so it hasn't had its first tune. It would seems timely to swap in the smaller turbo before the first tune but it isn't really practical unless I can do a simple turbo swap and use all of the other hardware as is. If there is more to change then just the head unit then the car isn't such a good deal.
If the T88 still performs fairly well at 15 psi in terms of lag then a change isn't even necessary but the big singles I have run across in Supras were poor street cars when you weren't racing them.
thanks for the response!
If the T88 still performs fairly well at 15 psi in terms of lag then a change isn't even necessary but the big singles I have run across in Supras were poor street cars when you weren't racing them.
thanks for the response!
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for a street car id just grab a gt35r, get it tuned and call it a day. You might have to make slight modifications to the downpipe or other small changes but I dont know exactly what snags you will encounter. A Turbo expert like Zero R from a-spec tuning or any of the big shops might help you out and hook you up with a good sized turbo for your needs.
I for one wouldnt want a T78 or 88 unless its a drag only car or highway weekend warrior
edit: wow strong join date
I for one wouldnt want a T78 or 88 unless its a drag only car or highway weekend warrior
edit: wow strong join date
#5
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I could always be wrong but: It should be a T4 manifold so a 35R or 40R would fit, but if it's the kit I'm thinking of it likely has a 4" down pipe so you would need to change that. Other than that... not much to it.
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also as its what your asking about the lag wont change on that turbo no matter what PSI your running it still needs to build boost and if its designed for 20 and you set it at 10 psi. Spool will be exactly the same just faster to full pressure becasue its less. you want faster spool get a different turbo. if your good with spool now just keep what ya got.
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#8
Stay tuned...
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I have a chance to buy this car for a decent price.
13B Engine (Full Rebuild), Ported, 3mm Apex Seals, Power FC with Commander and MAP, 850/1600cc Injector Kit (primary/secondary), T88 Greddy Single Turbo Kit, Greddy Boost Controller, Boost Gauge, CC3 Intercooler, Turbo Heat Shield (OMP), CC3 Intercooler, Aluminum Radiator (Fluidyne), 3 ¾" Greddy Exhaust, RPS Clutch Package, 18" Wheels and Tires, Power Stop Brake Kit, 5 Way Adjustable Struts and Springs, Front and Rear Stab Bars. New: V-Band Connectors (exhaust), Plug Wires, Plugs and Coil, Engine Wiring Harness / Coil Harness, Coolant Temp Sensor, HKS Blow Off Valve
He doesn't have a dyno sheet but this seems to be a 500+ hp setup which is maybe 100hp more than I need. If I just set the max boost down to 15psi the single will give me a weak low end right?
Will a T78 swap in with no changes? These are a Mitsubishi turbo correct? Can I just buy a smaller Mitsu fan or were the Greddy units specially modified to fit?
Any thoughts?
13B Engine (Full Rebuild), Ported, 3mm Apex Seals, Power FC with Commander and MAP, 850/1600cc Injector Kit (primary/secondary), T88 Greddy Single Turbo Kit, Greddy Boost Controller, Boost Gauge, CC3 Intercooler, Turbo Heat Shield (OMP), CC3 Intercooler, Aluminum Radiator (Fluidyne), 3 ¾" Greddy Exhaust, RPS Clutch Package, 18" Wheels and Tires, Power Stop Brake Kit, 5 Way Adjustable Struts and Springs, Front and Rear Stab Bars. New: V-Band Connectors (exhaust), Plug Wires, Plugs and Coil, Engine Wiring Harness / Coil Harness, Coolant Temp Sensor, HKS Blow Off Valve
He doesn't have a dyno sheet but this seems to be a 500+ hp setup which is maybe 100hp more than I need. If I just set the max boost down to 15psi the single will give me a weak low end right?
Will a T78 swap in with no changes? These are a Mitsubishi turbo correct? Can I just buy a smaller Mitsu fan or were the Greddy units specially modified to fit?
Any thoughts?
#9
Rotary Freak
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Most likely the 34d since its a kit. Just change the wastegate spring to a lower PSI unit or just turn down the boost. 10psi-15psi is more then enough on the street with a t88-34d on 93 pump gas. Claiming 500whp is most likely on race gas and over 20psi. I'd be more concerned with engine compression and turbo shaft play when buying a single turbo car...
#11
SSS-TUTUTU
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Most likely the 34d since its a kit. Just change the wastegate spring to a lower PSI unit or just turn down the boost. 10psi-15psi is more then enough on the street with a t88-34d on 93 pump gas. Claiming 500whp is most likely on race gas and over 20psi. I'd be more concerned with engine compression and turbo shaft play when buying a single turbo car...
#13
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And to 1Revvin7 I definitely wouldn't buy the car untuned even if I had to pay for the tune myself.
#14
Rotary Freak
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There are alot of t88 FDs around here and lag really isn't a big deal for the street. If you really like the car and can't find a better car for the price just sell the t88 kit and buy a GT35R or something similar with a quicker spool and make a stable 3-400whp range once tuned by someone who knows what they are doing...
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There are alot of t88 FDs around here and lag really isn't a big deal for the street. If you really like the car and can't find a better car for the price just sell the t88 kit and buy a GT35R or something similar with a quicker spool and make a stable 3-400whp range once tuned by someone who knows what they are doing...
I guess you would get something back from the colder air charge though right? In terms of making more power per psi of boost on a bigger turbo? If the T88 turns out to be nearly as tractable as a T78 then really optimized power is not that big of a deal. I know it won't have the low end of my LS1 or even my old Stealth TT but I remember a Supra guy having to brake stand to merge his big single a/t car into traffic and that is what spooks me. It was like having an n/a V8 with way too much cam for street use.
I am thinking I may just have to nut up and leave it as is, and then decide how much the lag conflicts with my driving style. I just don't want to buy a car that is too biased for the drag strip. Are there any guys that don't take these big singles to the track or is it kind of understood that is the point?
#16
Rotary Freak
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Usualy when people put nice sized single turbos on rotarys its for reaching the 500whp + goal and looking for higher eficiency at higher booster levels mainly for drag racing. I enjoy the T88 and so do alot of others who drive their FDs on the street with T88s. GT42 on the other hand are abit too big to have any real fun on the street. You could easily get $2k for your T88 kit if its in good shape and just put that $ into a smaller turbo kit like the one I mentioned for a zippy rocket street car if that is what you are mainly after.
Good luck on your decision..
Good luck on your decision..
#17
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Usualy when people put nice sized single turbos on rotarys its for reaching the 500whp + goal and looking for higher eficiency at higher booster levels mainly for drag racing. I enjoy the T88 and so do alot of others who drive their FDs on the street with T88s. GT42 on the other hand are abit too big to have any real fun on the street. You could easily get $2k for your T88 kit if its in good shape and just put that $ into a smaller turbo kit like the one I mentioned for a zippy rocket street car if that is what you are mainly after.
Good luck on your decision..
Good luck on your decision..
Everything else around here is RHD or has twins on it so it may be a while. That's okay, it is snowing here this week.
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