Baddest small-size T4 turbo out there? Want to upgrade my TC78
#62
#64
#66
#68
Is this the one you're talking about?
http://store.forcedperformance.net/m...tegory_Code=SP
Do you know dimensions of this thing? Judging by the weight (40#), must be quite big
#69
I've studied logs from my GTech and realized that power starts to lower after 5500rpm on medium boost and after 5100rpm on higher boost. Torque peaks at 3800rpm in all cases. I have manual boost controller and cam is Thunder racing 214/220 .600/.523 115 LSA.
Does this sound like turbo is choked? Can that explain my low trap speed, converter keeping the engine at 6200 rpms where power has dropped considerably?
Does this sound like turbo is choked? Can that explain my low trap speed, converter keeping the engine at 6200 rpms where power has dropped considerably?
#71
TECH Resident
iTrader: (28)
Join Date: May 2005
Location: NY
Posts: 823
Likes: 0
Received 0 Likes
on
0 Posts
Almost overlooked this...
Is this the one you're talking about?
http://store.forcedperformance.net/m...tegory_Code=SP
Do you know dimensions of this thing? Judging by the weight (40#), must be quite big
Is this the one you're talking about?
http://store.forcedperformance.net/m...tegory_Code=SP
Do you know dimensions of this thing? Judging by the weight (40#), must be quite big
#72
Almost overlooked this...
Is this the one you're talking about?
http://store.forcedperformance.net/m...tegory_Code=SP
Do you know dimensions of this thing? Judging by the weight (40#), must be quite big
Is this the one you're talking about?
http://store.forcedperformance.net/m...tegory_Code=SP
Do you know dimensions of this thing? Judging by the weight (40#), must be quite big
#73
9 Second Truck Club
iTrader: (17)
I've studied logs from my GTech and realized that power starts to lower after 5500rpm on medium boost and after 5100rpm on higher boost. Torque peaks at 3800rpm in all cases. I have manual boost controller and cam is Thunder racing 214/220 .600/.523 115 LSA.
Does this sound like turbo is choked? Can that explain my low trap speed, converter keeping the engine at 6200 rpms where power has dropped considerably?
Does this sound like turbo is choked? Can that explain my low trap speed, converter keeping the engine at 6200 rpms where power has dropped considerably?
#74
Yes. You are loosing a lot with the converter slipping like that, and 214/.600" is too agressive of an intake lobe IMO. Like I told you before you need a good turbo converter. No reason why car shouldn't be trapping mid 140's+ with current turbo, and should go mid 150's with a 76/75.
#77
TECH Enthusiast
Join Date: Jan 2004
Location: New Zealand
Posts: 608
Likes: 0
Received 0 Likes
on
0 Posts
That turbo is done on a 383.
I had one on a 383, made just under 700 rwhp turbo was maxed and that was with a 1.32 ar exhaust housing.
I have since replaced the 383 with a forged 347, same turbo, same evrything else and made 770 rwhp, and the turbo still has a bit left in it..
works much better with the smaller cubes.
I had one on a 383, made just under 700 rwhp turbo was maxed and that was with a 1.32 ar exhaust housing.
I have since replaced the 383 with a forged 347, same turbo, same evrything else and made 770 rwhp, and the turbo still has a bit left in it..
works much better with the smaller cubes.
#78
9 Second Truck Club
iTrader: (17)
The TC78/68 can make 700 hp on 6.0L at 4800-5200 rpm after that it's down hill. If you keep the combo in it's power range it can do work but if it's running 1000 rpm past pk the ET and mph won't reflect the power. I have ran 129.xx with both a Tc76/68, and T78/68 on 6.0L @ 4850 lbs. There is anothe guy on here rhat ran low 9's at 150+ with a 370 ci mustang with a tc78/68. There is more in your combo and the converter is the first place I would look if it does not pull down below 6200 rpm under wot. If you want more rpm than you need more turbine but still you will likely pk at or below 6K even with a 76/75, or 88/94. As you add power the converter is just going to go higher. You can try some John Deere Hygurd in the trans it might tighten you up 2-400 rpm.
#79
The TC78/68 can make 700 hp on 6.0L at 4800-5200 rpm after that it's down hill. If you keep the combo in it's power range it can do work but if it's running 1000 rpm past pk the ET and mph won't reflect the power. I have ran 129.xx with both a Tc76/68, and T78/68 on 6.0L @ 4850 lbs. There is anothe guy on here rhat ran low 9's at 150+ with a 370 ci mustang with a tc78/68. There is more in your combo and the converter is the first place I would look if it does not pull down below 6200 rpm under wot. If you want more rpm than you need more turbine but still you will likely pk at or below 6K even with a 76/75, or 88/94. As you add power the converter is just going to go higher. You can try some John Deere Hygurd in the trans it might tighten you up 2-400 rpm.
Or do you still think it is slipping too much on its own and will do that even with PT 8847?