Best turbo for DD stock LS1 w/ T56?
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Best turbo for DD stock LS1 w/ T56?
I'm sure this has been discussed before but searching wasn't bringing anything up for my specific application (stock cam, daily driver, no racing). Looking for turbo size recommendations.
Car is an 02 Z28 w/ T56. Engine will be a stock 42k mile LS1 with the normal valvetrain upgrades. I will be keeping the stock cam for drivability/sound reasons. Turbo kit will be the Huron Speed V2 A/C kit and rear gear likely 3.42 or similar.
The car will be daily driven for 6 months out of the year. It will likely never see the track. I basically want stock drivability, quiet, and reliable.
So far everyone seems to talk about the PT7675 as being the end-all-be-all turbo for a 346ci setup. The difference is, I am not worried about racing or times at all, it will be a true daily driver. I want something with the broadest torque curve and best responsiveness possible for daily driving situations, while still being reliable. Something similar to what an OEM would do if they were making a turbo engine. Looking for around 500-550rwhp on 93 octane. Would I be better off looking into a 67mm turbo? Or will the PT7675 give me the responsiveness and torque I'm looking for?
Car is an 02 Z28 w/ T56. Engine will be a stock 42k mile LS1 with the normal valvetrain upgrades. I will be keeping the stock cam for drivability/sound reasons. Turbo kit will be the Huron Speed V2 A/C kit and rear gear likely 3.42 or similar.
The car will be daily driven for 6 months out of the year. It will likely never see the track. I basically want stock drivability, quiet, and reliable.
So far everyone seems to talk about the PT7675 as being the end-all-be-all turbo for a 346ci setup. The difference is, I am not worried about racing or times at all, it will be a true daily driver. I want something with the broadest torque curve and best responsiveness possible for daily driving situations, while still being reliable. Something similar to what an OEM would do if they were making a turbo engine. Looking for around 500-550rwhp on 93 octane. Would I be better off looking into a 67mm turbo? Or will the PT7675 give me the responsiveness and torque I'm looking for?
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I'm sure this has been discussed before but searching wasn't bringing anything up for my specific application (stock cam, daily driver, no racing). Looking for turbo size recommendations.
Car is an 02 Z28 w/ T56. Engine will be a stock 42k mile LS1 with the normal valvetrain upgrades. I will be keeping the stock cam for drivability/sound reasons. Turbo kit will be the Huron Speed V2 A/C kit and rear gear likely 3.42 or similar.
The car will be daily driven for 6 months out of the year. It will likely never see the track. I basically want stock drivability, quiet, and reliable.
So far everyone seems to talk about the PT7675 as being the end-all-be-all turbo for a 346ci setup. The difference is, I am not worried about racing or times at all, it will be a true daily driver. I want something with the broadest torque curve and best responsiveness possible for daily driving situations, while still being reliable. Something similar to what an OEM would do if they were making a turbo engine. Looking for around 500-550rwhp on 93 octane. Would I be better off looking into a 67mm turbo? Or will the PT7675 give me the responsiveness and torque I'm looking for?
Car is an 02 Z28 w/ T56. Engine will be a stock 42k mile LS1 with the normal valvetrain upgrades. I will be keeping the stock cam for drivability/sound reasons. Turbo kit will be the Huron Speed V2 A/C kit and rear gear likely 3.42 or similar.
The car will be daily driven for 6 months out of the year. It will likely never see the track. I basically want stock drivability, quiet, and reliable.
So far everyone seems to talk about the PT7675 as being the end-all-be-all turbo for a 346ci setup. The difference is, I am not worried about racing or times at all, it will be a true daily driver. I want something with the broadest torque curve and best responsiveness possible for daily driving situations, while still being reliable. Something similar to what an OEM would do if they were making a turbo engine. Looking for around 500-550rwhp on 93 octane. Would I be better off looking into a 67mm turbo? Or will the PT7675 give me the responsiveness and torque I'm looking for?
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Your setup sounds EXACTLY like mine and I'm running the Turbonetics TC76 with great results. It even made exactly your HP goal of 550 RWHP at 7psi. It's a great cheap turbo that will do everything you're looking to do with your setup.
Just noticed you're only an hour down the road if you ever want to check the car out in person, or go for a ride after I break my clutch in.... just let me know!
Just noticed you're only an hour down the road if you ever want to check the car out in person, or go for a ride after I break my clutch in.... just let me know!
Last edited by JetMech99; 04-15-2015 at 08:57 AM.
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Your setup sounds EXACTLY like mine and I'm running the Turbonetics TC76 with great results. It even made exactly your HP goal of 550 RWHP at 7psi. It's a great cheap turbo that will do everything you're looking to do with your setup.
Just noticed you're only an hour down the road if you ever want to check the car out in person, so go for a ride after I break my clutch in.... just let me know!
Just noticed you're only an hour down the road if you ever want to check the car out in person, so go for a ride after I break my clutch in.... just let me know!
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TC76 or TC78 will be a great choice for your set-up Jim. If you want something that can be pushed harder down the road, then look into the 7675, however for a street car, stock bottom end, t56 set-up the tc76 or tc78 will perform excellent and spool quickly. JetMech is good people, if you don't take him up for a ride I just might for a fun day!
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If the guy truly wants 550hp then running a 76mm with a small exhaust wheel (TC series) is going to perform poorly compared to an S366 response wise. Last I checked the S366 was cheaper as well. You also don’t need a 76mm compressor for 550hp. A compressor that big isn’t as efficient at low boost as a 66mm compressor would be. At the OP’s desired power level, the S366 would blow the TC76/TC78 out of the water hands down IMO.
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A BW S300 will not bolt onto the kit without modifications, different frame.
We have used the TC76 and TC78 along with tons of customers on stock displacement set-ups and they perform excellent providing great power and excellent spool time.
We have used the TC76 and TC78 along with tons of customers on stock displacement set-ups and they perform excellent providing great power and excellent spool time.
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TC76 or TC78 will be a great choice for your set-up Jim. If you want something that can be pushed harder down the road, then look into the 7675, however for a street car, stock bottom end, t56 set-up the tc76 or tc78 will perform excellent and spool quickly. JetMech is good people, if you don't take him up for a ride I just might for a fun day!
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Personally if I were building a manual trans DD turbo car, I’d want the quickest response possible that still met my goal. Selecting a turbo with an oversized compressor and a 10mm split between the exh and comp wheel seems like a poor choice.
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Not trying to be a smartass, but “excellent spool time” compared to what? I 100% agree that either of the 76/78 series mentioned can make 550 hp on the OP’s setup. There are a lot of turbos that would be more responsive and still meet a 500-550hp goal. Why not a TC66 with the F1 turbine or the 72mm Hurricane “Sylvia” if he wanted room to grow? Either of those would have better response and still make the power.
Personally if I were building a manual trans DD turbo car, I’d want the quickest response possible that still met my goal. Selecting a turbo with an oversized compressor and a 10mm split between the exh and comp wheel seems like a poor choice.
Personally if I were building a manual trans DD turbo car, I’d want the quickest response possible that still met my goal. Selecting a turbo with an oversized compressor and a 10mm split between the exh and comp wheel seems like a poor choice.
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If the guy truly wants 550hp then running a 76mm with a small exhaust wheel (TC series) is going to perform poorly compared to an S366 response wise. Last I checked the S366 was cheaper as well. You also don’t need a 76mm compressor for 550hp. A compressor that big isn’t as efficient at low boost as a 66mm compressor would be. At the OP’s desired power level, the S366 would blow the TC76/TC78 out of the water hands down IMO.
I agree tho 76-78 wheels are not needed, just sayin the smaller 68 f1 turbine wheel will be very responsive.
I would run the hurricane 66mm stuff on this car since borg 300 wont fit. It should do 500-550 thru a stick.
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Thanks for the input guys.
Jon - What needs to be modified to make the S366 fit? I like the idea of that turbo from my research, and the reliability that BW seems to be known for would be great as I plan to put 8-10k miles a year on this car and take it on road trips. Also, I have no plans to build the engine so as long as my dyno number starts with a 5 I'll be happy. Now I wouldn't complain if it was 599, but I also don't care (too much, lol) if it was 501. I have no issue with buying a new turbo if I ever need more. Also want to make this power without meth so that's a factor too. I'm much more concerned about drivability & reliability than I am power numbers.
JetMech99 - Would love to take a ride sometime! Let me know when.
Forcefed86 - Thanks for your input, that's very helpful and was what I was gathering from my research. I'm getting fairly set on the idea of a ~67mm turbo as long as it doesn't have any large negatives.
Jon - What needs to be modified to make the S366 fit? I like the idea of that turbo from my research, and the reliability that BW seems to be known for would be great as I plan to put 8-10k miles a year on this car and take it on road trips. Also, I have no plans to build the engine so as long as my dyno number starts with a 5 I'll be happy. Now I wouldn't complain if it was 599, but I also don't care (too much, lol) if it was 501. I have no issue with buying a new turbo if I ever need more. Also want to make this power without meth so that's a factor too. I'm much more concerned about drivability & reliability than I am power numbers.
JetMech99 - Would love to take a ride sometime! Let me know when.
Forcefed86 - Thanks for your input, that's very helpful and was what I was gathering from my research. I'm getting fairly set on the idea of a ~67mm turbo as long as it doesn't have any large negatives.
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I'm actually currently doing a TC78/Huron Speed V1 build blog right now! I have no numbers yet but my goals are identical to yours. Trust Jon because when I reached out to Pat G. for tuning info he told me EXACTLY what Jon said about drivability, spool and horsepower plus Pat said I would have an extra fat midrange torque curve at tip in which as you know is what you want in a street car. The Huron Speed kit fits really nice too cause there ain't much room under there lol!
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I have the Hsp v1 kit with a pt7675, I wouldn't go any other way with a sbe5.7
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
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I have the Hsp v1 kit with a pt7675, I wouldn't go any other way with a sbe5.7
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
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I have the Hsp v1 kit with a pt7675, I wouldn't go any other way with a sbe5.7
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
My car makes full boost at 2900-3000 rpm's 11psi 623whp. It's fun as hell to drive with the 6speed. The only issue your going to run into is traction on an street tire. Personal the tc76/78 will choke way to quick, now your stuck having to upgrade. I have no experience with the TC 7675 so maybe some will chime in.
I say go with the PT7675 and don't look back. Just my 2 cents
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Will drop right on, same flanges. The compressor housing is a little larger so you may need to push the radiator/condenser forward some for some more clearance but other than that and a silicone coupler change you will be good to go!
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I would get a 76 68. I had the cxracing version (talk trash if you want it lasted 20k before I upgraded) and it made full boost by 2500rpms. I loved dd'ing the car with the 6speed. I made 616rwhp at only 7lbs of boost.