Single or Twin?
09-10-2006, 11:26 AM
#1
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Single or Twin? Is there a real benefit in going twin turbo? I know it'll cost more... but how much would it actually cost since my single kit is gonna cost me like $7500? I was gonna go with a T76 GTS-H with an 80mm wheel and a air to air intercooler.
But if I went with twin T67s or something to that effect... wouldn't it just be more efficient?
This will be a street driven car... looking for as much power as possible. haha
625whp on pump is the goal and 900whp+ on C16
But if I went with twin T67s or something to that effect... wouldn't it just be more efficient?
This will be a street driven car... looking for as much power as possible. haha
625whp on pump is the goal and 900whp+ on C16
09-10-2006, 11:47 AM
#2
The 67's will be more efficient at 900rwhp, but you will have more lag. Its up to you though....its all a trade off. Go with a set of TC67's or PT67's and you will have enough to make 1300+ rwhp.
09-10-2006, 02:00 PM
#4
I think you should define your goals a little clearer... not trying to be a jerk, but there are usually trade offs between street driven and as much power as possible. Sometime as much power as possible is going to make a car that is impractical to drive on the street, and might not give you the feel you are looking for.
As far as efficiency goes, I think one larger turbo is going to be more efficient than a set of twins. I think efficiency in reference to a turbo setup relates to how much the compressor wheel heats up the air under boost.
As far as efficiency goes, I think one larger turbo is going to be more efficient than a set of twins. I think efficiency in reference to a turbo setup relates to how much the compressor wheel heats up the air under boost.
09-10-2006, 07:40 PM
#5
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Originally Posted by FastKat
I think you should define your goals a little clearer... not trying to be a jerk, but there are usually trade offs between street driven and as much power as possible. Sometime as much power as possible is going to make a car that is impractical to drive on the street, and might not give you the feel you are looking for.
As far as efficiency goes, I think one larger turbo is going to be more efficient than a set of twins. I think efficiency in reference to a turbo setup relates to how much the compressor wheel heats up the air under boost.
As far as efficiency goes, I think one larger turbo is going to be more efficient than a set of twins. I think efficiency in reference to a turbo setup relates to how much the compressor wheel heats up the air under boost.
I basically want to know that if it comes down to it.
I have stuff like the R1, Busa, and T72 Supras beat. :-)
09-10-2006, 08:43 PM
#6
A single kit is easier to fit into an f-bod, less costly and a little more street friendly IMO.
Twins in a 67 will be a tough fit if you feel or want to keep the car with stock accessories, not move stuff and run cool.
Twins in a 67 will be a tough fit if you feel or want to keep the car with stock accessories, not move stuff and run cool.
09-11-2006, 03:09 PM
#7
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Originally Posted by NOSjohn
A single kit is easier to fit into an f-bod, less costly and a little more street friendly IMO.
Twins in a 67 will be a tough fit if you feel or want to keep the car with stock accessories, not move stuff and run cool.
Twins in a 67 will be a tough fit if you feel or want to keep the car with stock accessories, not move stuff and run cool.
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09-11-2006, 03:26 PM
#8
Well, yes you can do that too. However, I'm speaking about heat, driving in traffic and not having to put 2 different fans, water wetter, a lower t-stat...and other items on your car to keep it cool. 
2 turbos generate more heat than just 1...especially in a stock configured car.
2 turbos generate more heat than just 1...especially in a stock configured car.
09-11-2006, 03:49 PM
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Originally Posted by NOSjohn
Well, yes you can do that too. However, I'm speaking about heat, driving in traffic and not having to put 2 different fans, water wetter, a lower t-stat...and other items on your car to keep it cool.
2 turbos generate more heat than just 1...especially in a stock configured car.
2 turbos generate more heat than just 1...especially in a stock configured car.
I am more then likely throwing in a better radiator anyway. If I can throw in another fan... I definitely would. Lower T-Stat isn't really a hard thing to do. haha
09-11-2006, 04:14 PM
#10
I think regardless of whether you are using a single or twins, using a high quality ceramic coating, exhaust wrap, a turbo blanket, or all of the above is going to go a long way for controlling under the hood and engine temperatures.
Is a big single and a set of twins generally going to give you a different torque curve?
Is a big single and a set of twins generally going to give you a different torque curve?
09-11-2006, 04:24 PM
#11
Originally Posted by ChrisUlrich
Ohhhh... I see what you're saying. Twin T67s would do that?
I am more then likely throwing in a better radiator anyway. If I can throw in another fan... I definitely would. Lower T-Stat isn't really a hard thing to do. haha
I am more then likely throwing in a better radiator anyway. If I can throw in another fan... I definitely would. Lower T-Stat isn't really a hard thing to do. haha
Yes, twins versus a single will have a different power curve. However, everything still relies on the total combination.
09-11-2006, 10:32 PM
#12
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my car has twin t-70's, griffin radiator (stock would NOT keep it cool), stock lt1 fans, and stock t stat, the other day i was sitting in dead stop traffic, 95 degrees outside, and just over 205*, then last week i had it out at night, real cool, about 70 degrees and i was cruising around town at about 180*
09-12-2006, 02:45 PM
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Originally Posted by will62085
my car has twin t-70's, griffin radiator (stock would NOT keep it cool), stock lt1 fans, and stock t stat, the other day i was sitting in dead stop traffic, 95 degrees outside, and just over 205*, then last week i had it out at night, real cool, about 70 degrees and i was cruising around town at about 180*
I have no problem relocating/deleting some pieces in the engine bay. I am definitely getting rid of AC and Heat thouigh. AC because it won't fit with the turbos and Heat because I never use it! I want to relocate the battery anyway... I want to give my engine compartment some room if possible if I had to do any kind of maint. to it
09-12-2006, 04:43 PM
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Nos John, Does the 4250$ price include a ceramic coated kit? Also is stainless or not? thanks. Sorry of hijacking the thread but that great price caught my eye. thanks. 
09-12-2006, 06:20 PM
#16
FormerVendor
I prefer twin turbos as IMO they are easier to package along with the accessories and lag is a non-issue if you have a good combination. It is possible to run twin 67's on an LT1 car without moving or deleting any accessories.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
09-12-2006, 07:30 PM
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Originally Posted by INTMD8
I prefer twin turbos as IMO they are easier to package along with the accessories and lag is a non-issue if you have a good combination. It is possible to run twin 67's on an LT1 car without moving or deleting any accessories.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
T80? What about Twin T76s?! LMFAO!
09-13-2006, 09:57 AM
#18
Originally Posted by 1badsupersport
Nos John, Does the 4250$ price include a ceramic coated kit? Also is stainless or not? thanks. Sorry of hijacking the thread but that great price caught my eye. thanks.
09-13-2006, 12:02 PM
#19
Originally Posted by INTMD8
I prefer twin turbos as IMO they are easier to package along with the accessories and lag is a non-issue if you have a good combination. It is possible to run twin 67's on an LT1 car without moving or deleting any accessories.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
(I run twin 61's but I could directly bolt in anything up to 80's). My car also has the stock cooling system and never overheats, even in 95+deg weather with the A/C cranked.
thank you very much,
Chris.
09-13-2006, 08:23 PM
#20
FormerVendor
Originally Posted by chuntington101
where do you mount the turbos?? any chance of any pics?
thank you very much,
Chris.
thank you very much,
Chris.
www.ls1speed.com/pictures/70105_001.jpg
www.ls1speed.com/pictures/70105_007.jpg
www.ls1speed.com/pictures/70105_008.jpg
www.ls1speed.com/pictures/70105_011.jpg