t-76 turbocharger
01-26-2004, 12:28 PM
#2
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Join Date: Sep 2003
Location: Andrews, Texas
Posts: 63
Originally posted by aggiez28
proturbokits sells a kit i believe. im doign a custom kit on my car so im not paying much attention to the kits out there.
inductionmotorsports can get you a good deal on just the t76 if you want t just the head unit.
i was gonna get the 76gts but went with an 88 insted
brook
proturbokits sells a kit i believe. im doign a custom kit on my car so im not paying much attention to the kits out there.
inductionmotorsports can get you a good deal on just the t76 if you want t just the head unit.
i was gonna get the 76gts but went with an 88 insted
brook
01-26-2004, 10:56 PM
#4
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Join Date: Dec 2003
Posts: 18
Originally posted by aggiez28
inductionmotorsports can get you a good deal on just the t76 if you want t just the head unit.
inductionmotorsports can get you a good deal on just the t76 if you want t just the head unit.
www.inductionmotorsports.com
01-27-2004, 08:30 AM
#5
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Join Date: Oct 2000
Location: Sioux Falls, SD
Posts: 509
I concur. www.inductionmotorsports.com has some very knowledgable people who are always willing to help.
01-27-2004, 12:18 PM
#6
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Join Date: Feb 2001
Location: Belleville, IL
Posts: 1,450
IM is Jeff Bromberger's company, right(had the LT1 Z running mid 9s)?
Hey Brook, just curious, how much was the GTS going to set you back? I'm looking at slapping a 76 or 88 on a tin can motor (LS1).
Hey Brook, just curious, how much was the GTS going to set you back? I'm looking at slapping a 76 or 88 on a tin can motor (LS1).
01-28-2004, 02:28 PM
#9
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Join Date: May 1999
Location: omaha, NE
Posts: 61
Thanks for the support guys... I think a pair of SC61's would work extremely well in a twin application... you will have boost by the mid 2000rpms and potential for 1100rwhp...
of course, for max power, you can't beat a larger single...
the cost of twins will always be more than a single and in the case of a V8 you have plenty of cubes to spool the larger turbo, so i don't really see a reason to go with twins... but that's just my unsolicited 2 cents!
Jeff
InductionMotorsports.com
'94 Z28 9.56 @ 143 w/a 1.35 60'
of course, for max power, you can't beat a larger single...
the cost of twins will always be more than a single and in the case of a V8 you have plenty of cubes to spool the larger turbo, so i don't really see a reason to go with twins... but that's just my unsolicited 2 cents!
Jeff
InductionMotorsports.com
'94 Z28 9.56 @ 143 w/a 1.35 60'
01-28-2004, 03:06 PM
#10
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Join Date: Jun 2002
Location: Cheyenne, Wyoming
Posts: 101
turbo's
I am not a mechanic so if you could, can you tell me What will make the twin turbo set up more expensive than the single?Is it the plumbing? I can buy two new HIFI 60-1 turbos for $50 less than one t-76. I would really like to know because I have a few days yet before I am 100% commited to go either way, as I am waiting on the pistons and cam.
01-28-2004, 03:24 PM
#11
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Join Date: May 1999
Location: omaha, NE
Posts: 61
there are a couple of factors to look at... first off, its not a fair comparison to take an "old school" dinosaur turbo like the 60-1 and compare it to a new PT76GTS... to make the comparison fair, you'd have to look at turbos that both have similar "genetics", namely - Garrett GT technology... the SC61 is a 61mm turbo that builds off of components from this family, as does the PT76GTS... in this particular case, 2 SC61s retail for $1550 and the PT76GTS retails for $1540... in this size range, the cost of the turbos themselves is a toss-up... the extra expense of the twins comes from the redundant items like two wastegates, two oil lines setups, two boost controllers, etc... and of course, more feet of tubing (although the tubing will be smaller diameter which is cheaper per foot)... though not a monetary cost, weight favors the single as well... two 61mm turbos weigh a lot more than 1 76mm turbo...
flip things around for a minute, what do twins gain for you? even if the cost was identical, why would you want more parts that could potentially fail? packaging isn't a good answer on a 4th gen f-body -- twins are a nightmare! spool is really the only advantage that twins offer over a single, and like i said, with a decent sized motor this is a non-issue...
of course, 1 or 2 turbos is about 100x better than 0 turbos, so either route is a step in the right direction...
flip things around for a minute, what do twins gain for you? even if the cost was identical, why would you want more parts that could potentially fail? packaging isn't a good answer on a 4th gen f-body -- twins are a nightmare! spool is really the only advantage that twins offer over a single, and like i said, with a decent sized motor this is a non-issue...
of course, 1 or 2 turbos is about 100x better than 0 turbos, so either route is a step in the right direction...
01-28-2004, 03:27 PM
#12
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Join Date: Feb 2001
Location: Belleville, IL
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You will need an extra wastegate and BOV for twins. The tubing does come into effect, although you will not have to make a crossover pipe like you would for a single.
Nice site Jeff. Hope everything's working out great.
Nice site Jeff. Hope everything's working out great.
01-28-2004, 03:30 PM
#13
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Join Date: Apr 1999
Location: Cleveland, WI
Posts: 1,178
The only real expence is one added wastegate, one boost controller can control 2 turbo's, you only need 1 BOV. Plumbing is cheap.
Start plotting airflow requirements on the compressor maps for varying boost levels on a 355 and a 383 and it will become apparent that the twin SC61's will put and keep airflow in the max efficiency range much better than the PT-76. The SC61's are the turbo's I picked for my project.
Bill
Start plotting airflow requirements on the compressor maps for varying boost levels on a 355 and a 383 and it will become apparent that the twin SC61's will put and keep airflow in the max efficiency range much better than the PT-76. The SC61's are the turbo's I picked for my project.
Bill
01-28-2004, 03:46 PM
#15
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Join Date: May 1999
Location: omaha, NE
Posts: 61
Bill,
the compressor maps for these turbos aren't even available to the public... PTE has signed an NDA with Garrett to get access to this info... even the dealers like us can't access the maps... and to say that all 76mm turbos are the same is like saying all 350ci motors are the same... the aerodynamics and materials that the wheels are made out of are extremely important... size is a key factor, but its definitely not the whole picture (especially since the size we're talking about is the inducer, which doesn't necessarily correllate to the exducer size)...
in any case, there is definitely in increase in efficiency with a single big turbo vs. two smaller twins... housing to wheel clearances stay roughly the same all all turbos, but for a larger housing, this becomes a smaller percentage and thus increases the efficiency... don't get me wrong, i'm not knocking twins, if you can pull it off in your budget then go for it... i just don't see it as anything worth paying extra for in this case... if you had a 2.0L motor and you were trying to make 1500hp, then spool would be the primary concern and twins would be worth any amount of trouble... but guys are running 101mm and larger turbos on 383ci motors, so i don't think a 76 is anywhere close to being "too big"...
Joe - thanks for the comment!
the compressor maps for these turbos aren't even available to the public... PTE has signed an NDA with Garrett to get access to this info... even the dealers like us can't access the maps... and to say that all 76mm turbos are the same is like saying all 350ci motors are the same... the aerodynamics and materials that the wheels are made out of are extremely important... size is a key factor, but its definitely not the whole picture (especially since the size we're talking about is the inducer, which doesn't necessarily correllate to the exducer size)...
in any case, there is definitely in increase in efficiency with a single big turbo vs. two smaller twins... housing to wheel clearances stay roughly the same all all turbos, but for a larger housing, this becomes a smaller percentage and thus increases the efficiency... don't get me wrong, i'm not knocking twins, if you can pull it off in your budget then go for it... i just don't see it as anything worth paying extra for in this case... if you had a 2.0L motor and you were trying to make 1500hp, then spool would be the primary concern and twins would be worth any amount of trouble... but guys are running 101mm and larger turbos on 383ci motors, so i don't think a 76 is anywhere close to being "too big"...
Joe - thanks for the comment!