.96 ar vs bigger split housing ?????
.96 ar vs bigger split housing ????? Hey guys I tried searching for this info but couldn't find any real info.
Ok so I am building a single turbo setup for my C5. Here is the info:
99 C5 6 speed
07 LS2 block with ARP rod bolts and ARP head studs
LS9 Gaskets
Stock 317's with valvetrain
228/228 .588/.588 114lsa turbo cam
LS2 intake mani and TB
2 Bosch 044 pumps
FIC 1000cc injectors
e85
I will be using the PT7675 CEA billet wheel turbo with all the right supporting parts.
My question is:
I have noticed that this turbo makes some awesome power and insane torque(dont need 900+tq) with .96 housing on it however everybody's dyno graph falls off up top. Power seems to fade around 6000rpm's or sooner. Being a 6 speed I still want a quick spool but dont want power falling off. At the same time I dont want it to spool too fast and hurt my traction. Would I benefit from going with one of the bigger housings? Like the 1.15/1.28/1.32? I know they are split housings tho. What are the pro's and con's of a split housing on an open t4 manifold?
We have even considered porting the .96 or even one of the split housings. Has anybody ever done this?
Sorry if this is a newb question but I just wanted to get the RIGHT setup the first time. I'm looking to make 750-800 usable WHP.
Thanks!
Ok so I am building a single turbo setup for my C5. Here is the info:
99 C5 6 speed
07 LS2 block with ARP rod bolts and ARP head studs
LS9 Gaskets
Stock 317's with valvetrain
228/228 .588/.588 114lsa turbo cam
LS2 intake mani and TB
2 Bosch 044 pumps
FIC 1000cc injectors
e85
I will be using the PT7675 CEA billet wheel turbo with all the right supporting parts.
My question is:
I have noticed that this turbo makes some awesome power and insane torque(dont need 900+tq) with .96 housing on it however everybody's dyno graph falls off up top. Power seems to fade around 6000rpm's or sooner. Being a 6 speed I still want a quick spool but dont want power falling off. At the same time I dont want it to spool too fast and hurt my traction. Would I benefit from going with one of the bigger housings? Like the 1.15/1.28/1.32? I know they are split housings tho. What are the pro's and con's of a split housing on an open t4 manifold?
We have even considered porting the .96 or even one of the split housings. Has anybody ever done this?
Sorry if this is a newb question but I just wanted to get the RIGHT setup the first time. I'm looking to make 750-800 usable WHP.
Thanks!
9 Second Club
iTrader: (10)
Joined: Apr 2009
Posts: 1,230
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From: Joliet,IL and Las Vegas 50/50
Hey man I got your pm but figure ill post here as I'd like to hear feedback as well. I went with a .96 AR and am not sure if a bigger housing would benefit my 346ci since its got a 75mm turbine wheel. I figure that would be the choke point but I'd like to hear other people experience.
There were a few people that were looking into larger AR housings for the tc78 but since that thing had a dinky 68mm turbine wheel I don't think it would have helped at all. The 75 on our turbos are a bit bigger at least.
There were a few people that were looking into larger AR housings for the tc78 but since that thing had a dinky 68mm turbine wheel I don't think it would have helped at all. The 75 on our turbos are a bit bigger at least.
9 Second Club
iTrader: (10)
Joined: Apr 2009
Posts: 1,230
Likes: 3
From: Joliet,IL and Las Vegas 50/50
Btw I maxed out my 95lb injectors on e85 and wasn't pushing the turbo so you may want to consider some bigger injectors. I may go with 1600 or 2000 cc although the later is over kill for my setup.
However you should be able to make your power goals on a 6speed with those injectors on e85. They will be near their max though I'd think.
However you should be able to make your power goals on a 6speed with those injectors on e85. They will be near their max though I'd think.
Hey man I got your pm but figure ill post here as I'd like to hear feedback as well. I went with a .96 AR and am not sure if a bigger housing would benefit my 346ci since its got a 75mm turbine wheel. I figure that would be the choke point but I'd like to hear other people experience.
There were a few people that were looking into larger AR housings for the tc78 but since that thing had a dinky 68mm turbine wheel I don't think it would have helped at all. The 75 on our turbos are a bit bigger at least.
There were a few people that were looking into larger AR housings for the tc78 but since that thing had a dinky 68mm turbine wheel I don't think it would have helped at all. The 75 on our turbos are a bit bigger at least.
Btw I maxed out my 95lb injectors on e85 and wasn't pushing the turbo so you may want to consider some bigger injectors. I may go with 1600 or 2000 cc although the later is over kill for my setup.
However you should be able to make your power goals on a 6speed with those injectors on e85. They will be near their max though I'd think.
However you should be able to make your power goals on a 6speed with those injectors on e85. They will be near their max though I'd think.
TECH Enthusiast
Joined: Jan 2004
Posts: 608
Likes: 0
From: New Zealand
I had a TC 78 on a 383 with a .96 and went to a 1.32 ar, used to fall over around 5500 rpm with the .96, but would carry it to the limiter , 6700rpm with the 1.32 ar and spool just as quick.
How much more power did you make after going to the 1.32? Can you post up your dyno graph or PM it to me? Was the 1.32 a split housing?
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yeah the 68 kills the v8's thats like running a PTE 6766. sure the compressor moves more, but the exhuast wheel just fills up.
you will be happy with the .96 ar housing. Especially with your power goals. Having a 6 speed car you would rather have the smaller ar side. If you ever switch to an automatic you should think about getting a bigger exhaust housing though.
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
Posts: 3,672
Likes: 9
From: Colorado Springs, Co/ Central, Ca
Hey guys I tried searching for this info but couldn't find any real info.
Ok so I am building a single turbo setup for my C5. Here is the info:
99 C5 6 speed
07 LS2 block with ARP rod bolts and ARP head studs
LS9 Gaskets
Stock 317's with valvetrain
228/228 .588/.588 114lsa turbo cam
LS2 intake mani and TB
2 Bosch 044 pumps
FIC 1000cc injectors
e85
I will be using the PT7675 CEA billet wheel turbo with all the right supporting parts.
My question is:
I have noticed that this turbo makes some awesome power and insane torque(dont need 900+tq) with .96 housing on it however everybody's dyno graph falls off up top. Power seems to fade around 6000rpm's or sooner. Being a 6 speed I still want a quick spool but dont want power falling off. At the same time I dont want it to spool too fast and hurt my traction. Would I benefit from going with one of the bigger housings? Like the 1.15/1.28/1.32? I know they are split housings tho. What are the pro's and con's of a split housing on an open t4 manifold?
We have even considered porting the .96 or even one of the split housings. Has anybody ever done this?
Sorry if this is a newb question but I just wanted to get the RIGHT setup the first time. I'm looking to make 750-800 usable WHP.
Thanks!
Ok so I am building a single turbo setup for my C5. Here is the info:
99 C5 6 speed
07 LS2 block with ARP rod bolts and ARP head studs
LS9 Gaskets
Stock 317's with valvetrain
228/228 .588/.588 114lsa turbo cam
LS2 intake mani and TB
2 Bosch 044 pumps
FIC 1000cc injectors
e85
I will be using the PT7675 CEA billet wheel turbo with all the right supporting parts.
My question is:
I have noticed that this turbo makes some awesome power and insane torque(dont need 900+tq) with .96 housing on it however everybody's dyno graph falls off up top. Power seems to fade around 6000rpm's or sooner. Being a 6 speed I still want a quick spool but dont want power falling off. At the same time I dont want it to spool too fast and hurt my traction. Would I benefit from going with one of the bigger housings? Like the 1.15/1.28/1.32? I know they are split housings tho. What are the pro's and con's of a split housing on an open t4 manifold?
We have even considered porting the .96 or even one of the split housings. Has anybody ever done this?
Sorry if this is a newb question but I just wanted to get the RIGHT setup the first time. I'm looking to make 750-800 usable WHP.
Thanks!
So If I went with a 1.28 housing and ported it and cut down the divider what do you think spool time would change to? I am just wanting to make power to redline. Im sure an LS2 with a turbo cam and a billet wheel 76mm is going to spool quick regardless, right?
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
Posts: 3,672
Likes: 9
From: Colorado Springs, Co/ Central, Ca
Does the 1.28 come with a bigger turbine ? The notching and port work help but you need a big turbine if you want to carry the power high. I've found the 75mm turbines are going to plane off around 6k on 6.0L pretty much with any ex housing. The pt 76/75 might level off around 6k but it should hang in until 6500 or so before dropping much. Prob won't feel it fall off until 68-7k in seat of the pants. If you have room a S476/92/1.25 T4 ported a little would be about perfect.
Does the 1.28 come with a bigger turbine ? The notching and port work help but you need a big turbine if you want to carry the power high. I've found the 75mm turbines are going to plane off around 6k on 6.0L pretty much with any ex housing. The pt 76/75 might level off around 6k but it should hang in until 6500 or so before dropping much. Prob won't feel it fall off until 68-7k in seat of the pants. If you have room a S476/92/1.25 T4 ported a little would be about perfect.
Willmz: Can you post up your dyno graph?
9 Second Club
iTrader: (10)
Joined: Apr 2009
Posts: 1,230
Likes: 3
From: Joliet,IL and Las Vegas 50/50
I think you should be worried about your transaxle lasting at your desired power levels 
That whooshing sound will be the $ flying out of your wallet trying to keep the trans/rear diff together! '08+ Z06 TR6060 trans/diff is in your near future.... or lots of T56 rebuilds/repairs.
That whooshing sound will be the $ flying out of your wallet trying to keep the trans/rear diff together! '08+ Z06 TR6060 trans/diff is in your near future.... or lots of T56 rebuilds/repairs.
I think you should be worried about your transaxle lasting at your desired power levels
That whooshing sound will be the $ flying out of your wallet trying to keep the trans/rear diff together! '08+ Z06 TR6060 trans/diff is in your near future.... or lots of T56 rebuilds/repairs.
That whooshing sound will be the $ flying out of your wallet trying to keep the trans/rear diff together! '08+ Z06 TR6060 trans/diff is in your near future.... or lots of T56 rebuilds/repairs.
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