My somewhat coherent thread on the topic of street/strip turbo LS combinations.
08-20-2012, 03:54 PM
#41
What is the A/R on this 7675 of yours?
Thanks,
Thanks,
How much power do your street cars need, sadly most never need more than 600-700, but that 7675 has done mid 800's for me and I love it, spools INSTANTLY on my 5.3(over 800rwhp by 3800rpm) and enough to push my rx7 to 167.9mph and my ltd to 143.8mph at over 4000lbs and on pure street tires. In a decent fbody it should be enough to go 150mph on a 5.3, I think thats more than enough for MOST street cars.
08-20-2012, 04:18 PM
#42
Expect to see all of them out by November-December.
A lot more goes into designing cams than picking lobes, valve events and numbers and we want some real world data to use and go off of when making these decisions on camshafts so you the end user gets a refined product.
08-21-2012, 07:02 AM
#44
I can add a bit on the Borg Warner turbos. I have used a number of them in single configuration on 4 banger cars. One of my favorites was a small S256 turbo on a 2.5 liter with a T3 housing. It made 400 hp on pump gas on two different cars and spooled to 20 psi about as fast as the stock turbo that would only do 300hp max.
I also have some experience with their Efr turbos and I can say they are really cool and transient responce is great! Max hp is not really that different, but they are cool turbos and compare with the Garrett Gtx series, just with more features for your money (internal gate that works well and integrated bov) which makes their cost more reasonable.
The old faithful S300 series would be a great choice for twins. Bullseye Power has some crazy wheels for these that can make some crazy power. For the street, twin s256 or S360 turbos with their smallest housings would be very fun, for larger hp in the 1200+ range, the S366 and larger would be my choice.
Let the motor breath. Tiny housings and turbines do not always spool faster than larger ones. The above s256 turbos are a great example. Stock like spool and response with 100 more hp! The turbo is huge compared to a stock Subaru turbo, but spools about the same
All this being said, for my 5.3 I am doing a single S480 with the 92 turbine wheel and 1.10 T6 housing. My friend is doing twin 68mm turbos with a similar set up. I am anxious to see the difference between the two.
I also have some experience with their Efr turbos and I can say they are really cool and transient responce is great! Max hp is not really that different, but they are cool turbos and compare with the Garrett Gtx series, just with more features for your money (internal gate that works well and integrated bov) which makes their cost more reasonable.
The old faithful S300 series would be a great choice for twins. Bullseye Power has some crazy wheels for these that can make some crazy power. For the street, twin s256 or S360 turbos with their smallest housings would be very fun, for larger hp in the 1200+ range, the S366 and larger would be my choice.
Let the motor breath. Tiny housings and turbines do not always spool faster than larger ones. The above s256 turbos are a great example. Stock like spool and response with 100 more hp! The turbo is huge compared to a stock Subaru turbo, but spools about the same
All this being said, for my 5.3 I am doing a single S480 with the 92 turbine wheel and 1.10 T6 housing. My friend is doing twin 68mm turbos with a similar set up. I am anxious to see the difference between the two.
08-21-2012, 09:52 AM
#46
I can add a bit on the Borg Warner turbos. I have used a number of them in single configuration on 4 banger cars. One of my favorites was a small S256 turbo on a 2.5 liter with a T3 housing. It made 400 hp on pump gas on two different cars and spooled to 20 psi about as fast as the stock turbo that would only do 300hp max.
I also have some experience with their Efr turbos and I can say they are really cool and transient responce is great! Max hp is not really that different, but they are cool turbos and compare with the Garrett Gtx series, just with more features for your money (internal gate that works well and integrated bov) which makes their cost more reasonable.
The old faithful S300 series would be a great choice for twins. Bullseye Power has some crazy wheels for these that can make some crazy power. For the street, twin s256 or S360 turbos with their smallest housings would be very fun, for larger hp in the 1200+ range, the S366 and larger would be my choice.
Let the motor breath. Tiny housings and turbines do not always spool faster than larger ones. The above s256 turbos are a great example. Stock like spool and response with 100 more hp! The turbo is huge compared to a stock Subaru turbo, but spools about the same
All this being said, for my 5.3 I am doing a single S480 with the 92 turbine wheel and 1.10 T6 housing. My friend is doing twin 68mm turbos with a similar set up. I am anxious to see the difference between the two.
I also have some experience with their Efr turbos and I can say they are really cool and transient responce is great! Max hp is not really that different, but they are cool turbos and compare with the Garrett Gtx series, just with more features for your money (internal gate that works well and integrated bov) which makes their cost more reasonable.
The old faithful S300 series would be a great choice for twins. Bullseye Power has some crazy wheels for these that can make some crazy power. For the street, twin s256 or S360 turbos with their smallest housings would be very fun, for larger hp in the 1200+ range, the S366 and larger would be my choice.
Let the motor breath. Tiny housings and turbines do not always spool faster than larger ones. The above s256 turbos are a great example. Stock like spool and response with 100 more hp! The turbo is huge compared to a stock Subaru turbo, but spools about the same
All this being said, for my 5.3 I am doing a single S480 with the 92 turbine wheel and 1.10 T6 housing. My friend is doing twin 68mm turbos with a similar set up. I am anxious to see the difference between the two.
08-21-2012, 11:21 AM
#47
Well, what is the basis, ballpark or not, on choosing the proper exhaust wheel for a given displacement?
I have an LT1 355 cubes. When I got a recommendation back in 2008 from a Vendor here, he said to go with the TC76. I've been quite happy with that and I've ruined the day of all I've raced(including 3 recent gt500s). But from what Jim and you are saying, I'm leaving some power (and most importantly) some responsiveness on the table with this TC. After reading here, I had decided to either upgrade to a single 7675 or twin 6067e's. A 7675 would bolt right up to my kit as is so I was 'kinda' leaning that way till I read your post.
So, for a 355, what would be the best street/strip, daily driver M6 exhaust wheel (or heck, if you gotta 'ideal', what turbo model and A/R?)
Thanks everyone that has contributed here. This is all valuable stuff you're offering
Dave
I have an LT1 355 cubes. When I got a recommendation back in 2008 from a Vendor here, he said to go with the TC76. I've been quite happy with that and I've ruined the day of all I've raced(including 3 recent gt500s). But from what Jim and you are saying, I'm leaving some power (and most importantly) some responsiveness on the table with this TC. After reading here, I had decided to either upgrade to a single 7675 or twin 6067e's. A 7675 would bolt right up to my kit as is so I was 'kinda' leaning that way till I read your post.
So, for a 355, what would be the best street/strip, daily driver M6 exhaust wheel (or heck, if you gotta 'ideal', what turbo model and A/R?)
Thanks everyone that has contributed here. This is all valuable stuff you're offering
Dave
08-21-2012, 11:22 AM
#48
FormerVendor
Thread Starter
7675 does work nice as twins if you want to run low 7's.
08-21-2012, 04:16 PM
#50
7675 (76GTS) is a perfectly capable turbo with the right cubes (5.3-5.7). 82mm inducer on the turbine and 75mm exducer. BW rates their turbos by the inducer and precision seems to rate theirs by the exducer so you guys need to compare apples to apples.
Just look what NicD has done with his 76GTS. With a better 60' that's an 8 second car on less boost than your 6.0 took with the pt88 Los.
Just look what NicD has done with his 76GTS. With a better 60' that's an 8 second car on less boost than your 6.0 took with the pt88 Los.
08-21-2012, 06:56 PM
#52
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This is an interesting thread, i do agree with Skinnies, 700hp is ALOT for the "STREET".
I dont call a car that roams around the streets with slicks/new mickey DR a street car. regardless of trim level, a street car either, lol (flame on)
Hell, alot of this has to do with the powerglide/3.27 rear gear, but my 5.3/S475/96mm/1.32 combo will ignite the tires at any given speed up to 60mph on 315 street tires, in either high or low gear, rolling into the throttle, and builds boost stupid fast, faster then my 3960lb/4l60/TC78 GTO did.
Great thread OP!
EDIT: And ive been drinking, pay no attention to me lmao
I dont call a car that roams around the streets with slicks/new mickey DR a street car. regardless of trim level, a street car either, lol (flame on)
Hell, alot of this has to do with the powerglide/3.27 rear gear, but my 5.3/S475/96mm/1.32 combo will ignite the tires at any given speed up to 60mph on 315 street tires, in either high or low gear, rolling into the throttle, and builds boost stupid fast, faster then my 3960lb/4l60/TC78 GTO did.
Great thread OP!
EDIT: And ive been drinking, pay no attention to me
lmao 
08-22-2012, 01:55 PM
#55
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On more of a budget but still want twins capable of nearly the same power? Precision has in their entry level line a 6076E. Rated at 610hp each with a 59mm compressor wheel and p-trim exhaust wheel these aren't exactly new technology but would still make a kick *** twin setup and are only $599 each. I've used some similar turbos from them with a 54mm/Ptrim combo on their V-band exhaust housing and they were excellent with very small packaging.
Keep in mind that running a very small pair of twins, even something that could hit peak boost by 3k rpm will not choke the rpm range hard like an undersized single.
08-22-2012, 03:59 PM
#56
7675 (76GTS) is a perfectly capable turbo with the right cubes (5.3-5.7). 82mm inducer on the turbine and 75mm exducer. BW rates their turbos by the inducer and precision seems to rate theirs by the exducer so you guys need to compare apples to apples.
Just look what NicD has done with his 76GTS. With a better 60' that's an 8 second car on less boost than your 6.0 took with the pt88 Los.
http://www.youtube.com/watch?v=t5De_H4nbGY
Just look what NicD has done with his 76GTS. With a better 60' that's an 8 second car on less boost than your 6.0 took with the pt88 Los.
http://www.youtube.com/watch?v=t5De_H4nbGY
When comparing it to my PT88 you have to consider all the variables. The GTS turbine wheel is newer/better technology. He has less cubes and I'll bet that his car is lighter.
08-22-2012, 04:31 PM
#57
FormerVendor
Thread Starter
What they used to call a 76GTS is now called a 7675 but they are the same turbos.
They also offer a 7675cea with a billet compressor wheel.
They also offer a 7675cea with a billet compressor wheel.
08-22-2012, 04:57 PM
#58
08-22-2012, 08:37 PM
#59
I have a PT76GTS (.96) on my 370ci, TU1 cam..
What cubes is too big for a 76GTS? It spools instantly and w/ slicks and off a transbrake I dont see why it wouldnt break into the 8's. I think it works great for a low-mid 9sec street car. I think a bigger turbo would suck...unless you wanted to go faster.
What cubes is too big for a 76GTS? It spools instantly and w/ slicks and off a transbrake I dont see why it wouldnt break into the 8's. I think it works great for a low-mid 9sec street car. I think a bigger turbo would suck...unless you wanted to go faster.
08-22-2012, 08:49 PM
#60
Let's say we had a stockish LY6 (ARP rod/headbolts, some springs that can handle the RPM and boost and maybe LS9 gaskets) and I wanted to run a single T6 BorgWarner 80mm.
-What AR exhaust housing would you guys recommend?
-What turbine wheel? Bullseye offers the 87ish mm and BW has a few standard issue wheels in the 83-96mm range.
-What converter? Transmission will likely be a TH400 or 4L80E with RMVB and brake.
And just for giggles, what do you guys feel would be good cam combination? I'll try to max out the motor stock for stock but we all know how that goes. I'm sure I'll go to a LS3 intake and will want to move some more air.
This setup will be going in a 91 fox for what it's worth.
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-What AR exhaust housing would you guys recommend?
-What turbine wheel? Bullseye offers the 87ish mm and BW has a few standard issue wheels in the 83-96mm range.
-What converter? Transmission will likely be a TH400 or 4L80E with RMVB and brake.
And just for giggles, what do you guys feel would be good cam combination? I'll try to max out the motor stock for stock but we all know how that goes. I'm sure I'll go to a LS3 intake and will want to move some more air.
This setup will be going in a 91 fox for what it's worth.
Subscribed.