ebay 88mm turbo
Except when you have a 4000lb car and a 250lb driver... 100hp is rather mediocre. I have to make drastic power changes to make this boat anchor feel faster. I thought it was making maybe 800 on the old turbo and the S480 would make a solid 200hp more seeing how people make 1000 even with the cast wheel S480. I thought the billet wheel would be good for even more then that really. How much more boost can it run? Seen people pin the gates and it makes 29lbs. I don't have much of a wastegate as it is, single Tial 38mm.
Look at Stock48’s full size 4x4 pickup going 9.73/140 at a 4860 race weight with the small cast GT76 T4 turbo around 20lbs.
I've seen 5.3's make 250-275whp NA then go over 1000 on 25psi. According to theory they should only make 750-825.
Have you calculated the trans/converter slip? Because you didn’t see/feel a larger gain at the wheels doesn’t mean it’s not there either. That’s a ton of boost you’re running and I realize your vehicle is heavy. At such a heavy weight you are asking a lot of that trans/converter. If you’re not picking up a steady amount of power with each added LB of boost there is another problem. Throwing more boost larger turbos at it might not be the answer to making more power.
Look at Stock48’s full size 4x4 pickup going 9.73/140 at a 4860 race weight with the small cast GT76 T4 turbo around 20lbs.
It’s not a theory, it’s a fact. Can’t defy physics. Double the air density/fuel it doubles the power. (minus parasitic/heat losses.) Looking at chassis dyno readings there are too many variables/inflations. Strap that same engine to an engine dyno it will cut out a ton of variables and tell a different story. I'm not doubting you saw an indicated 250-275hp NA and an indicated 1000hp at 25psi. I'm doubting those indications were correct.
Look at Stock48’s full size 4x4 pickup going 9.73/140 at a 4860 race weight with the small cast GT76 T4 turbo around 20lbs.
It’s not a theory, it’s a fact. Can’t defy physics. Double the air density/fuel it doubles the power. (minus parasitic/heat losses.) Looking at chassis dyno readings there are too many variables/inflations. Strap that same engine to an engine dyno it will cut out a ton of variables and tell a different story. I'm not doubting you saw an indicated 250-275hp NA and an indicated 1000hp at 25psi. I'm doubting those indications were correct.
I'm not saying its not making more power, it obviously is... fuel flow, IDC, etc is all up and it rolls down the road ok. I'm just saying it wasn't the OMG increase I was expecting. I'll see how it does at the track and go from there.
Righto I'm not saying I have a clue whats going on with your setup. Only that heavier setups have trapped similar times with less boost on a smaller turbo. Meaning maybe all that power isn't getting to the ground, even with the old 88mm setup. Is that a 6.2? or a 6.0? What kind of slippage were you seeing with the 88?
Righto I'm not saying I have a clue whats going on with your setup. Only that heavier setups have trapped similar times with less boost on a smaller turbo. Meaning maybe all that power isn't getting to the ground, even with the old 88mm setup. Is that a 6.2? or a 6.0? What kind of slippage were you seeing with the 88?
They probably aren't running super safe tunes... Or maybe they are I have no idea but mine are pretty soft to keep stock junk together.
Think stock48 has put more miles on his SBE stuff than just about anybody on the SBE lists, Esp. that truck. Won drag week with his nova as well. And manages to make more power than any of them. Don’t get me wrong I can’t get my car to do anything near what his does and I’m lighter weight. Just mentioning it because I’m sure there’s room for improvement with that combo at that boost level with the S480.
15% Slip is nuts BTW. I’d call up Dusty at PTC and get that taken care of before touching anything else. If the company knew the gearing/tire size/weight when they built that converter there’s no excuse for 15% slip. If they are blaming the gear, I’d drop them in a heartbeat and go with a proven company that knows how to setup a turbo converter.
For example I was under 4% thru the traps with my PTC unit with a 29” tire and 3.25 gear. Can make 9-10lbs in about 2 seconds on the T-brake as well.
15% Slip is nuts BTW. I’d call up Dusty at PTC and get that taken care of before touching anything else. If the company knew the gearing/tire size/weight when they built that converter there’s no excuse for 15% slip. If they are blaming the gear, I’d drop them in a heartbeat and go with a proven company that knows how to setup a turbo converter.
For example I was under 4% thru the traps with my PTC unit with a 29” tire and 3.25 gear. Can make 9-10lbs in about 2 seconds on the T-brake as well.
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From: Avon, Ohio
But-I've went down this road with these guys. Although I agree with you, and there is a plie of evidence to show the dyno/trap is accurate, the internet physicist will claim you are wrong. There is no winning this argument.
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Think stock48 has put more miles on his SBE stuff than just about anybody on the SBE lists, Esp. that truck. Won drag week with his nova as well. And manages to make more power than any of them. Don’t get me wrong I can’t get my car to do anything near what his does and I’m lighter weight. Just mentioning it because I’m sure there’s room for improvement with that combo at that boost level with the S480.
15% Slip is nuts BTW. I’d call up Dusty at PTC and get that taken care of before touching anything else. If the company knew the gearing/tire size/weight when they built that converter there’s no excuse for 15% slip. If they are blaming the gear, I’d drop them in a heartbeat and go with a proven company that knows how to setup a turbo converter.
For example I was under 4% thru the traps with my PTC unit with a 29” tire and 3.25 gear. Can make 9-10lbs in about 2 seconds on the T-brake as well.
15% Slip is nuts BTW. I’d call up Dusty at PTC and get that taken care of before touching anything else. If the company knew the gearing/tire size/weight when they built that converter there’s no excuse for 15% slip. If they are blaming the gear, I’d drop them in a heartbeat and go with a proven company that knows how to setup a turbo converter.
For example I was under 4% thru the traps with my PTC unit with a 29” tire and 3.25 gear. Can make 9-10lbs in about 2 seconds on the T-brake as well.
I tried to get it down the track today but ran out of fuel pump... So I'll have to fix that before I give it the beans again.
1)silver_82 8.19@167.97 LM7@31psi @3250lbs
2)mxguy1286 8.29@164 4.8L@29psi @3000lbs LS Notch Fox body- Auto
3)skinnies 8.65@167.9 JY 5.3 @2600lb
4)Stock48-8.22@164mph-LQ4@23psi 3300lbs (Best ET)
5) ScreamingL 8.65@163.9 LY6@24 psi 3400llbs w/ driver
6) Dudeman-8.6@161mph trap-LY6 @3100lbs
7)-Forcefed86 -LC9-8.93 @ 159.24 at 24psi 2850lbs S476
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Joined: Jun 2013
Posts: 1,163
Likes: 16
From: Avon, Ohio
Couple on the top 10 list here. I'm sure there are others, not sure the list is up to date...
1)silver_82 8.19@167.97 LM7@31psi @3250lbs
2)mxguy1286 8.29@164 4.8L@29psi @3000lbs LS Notch Fox body- Auto
3)skinnies 8.65@167.9 JY 5.3 @2600lb
4)Stock48-8.22@164mph-LQ4@23psi 3300lbs (Best ET)
5) ScreamingL 8.65@163.9 LY6@24 psi 3400llbs w/ driver
6) Dudeman-8.6@161mph trap-LY6 @3100lbs
7)-Forcefed86 -LC9-8.93 @ 159.24 at 24psi 2850lbs S476
1)silver_82 8.19@167.97 LM7@31psi @3250lbs
2)mxguy1286 8.29@164 4.8L@29psi @3000lbs LS Notch Fox body- Auto
3)skinnies 8.65@167.9 JY 5.3 @2600lb
4)Stock48-8.22@164mph-LQ4@23psi 3300lbs (Best ET)
5) ScreamingL 8.65@163.9 LY6@24 psi 3400llbs w/ driver
6) Dudeman-8.6@161mph trap-LY6 @3100lbs
7)-Forcefed86 -LC9-8.93 @ 159.24 at 24psi 2850lbs S476
Took the S480 out for a spin to compare to the On3 88mm... not a huge difference. I guess the S480 is good for an 80mm but still a little lacking to me. I was expecting shock and awe according to the people claiming 1000+whp with it.
S480 spools a little faster roughly 200-400RPM but doesn't seem to make a ton more power up top. Looking at fueling On3 at 26PSI vs S480 on 27lbs is maybe 100hp difference. I guess that's a decent amount but I was expecting more the way people worship these things.
S480 spools a little faster roughly 200-400RPM but doesn't seem to make a ton more power up top. Looking at fueling On3 at 26PSI vs S480 on 27lbs is maybe 100hp difference. I guess that's a decent amount but I was expecting more the way people worship these things.
Turns out the problem I had after installing the S480 was lack of fueling, causing it to feel like a turd. New turbo caused me to run out of pump and it was going lean (thank god for E85 it didn't blow up!). I installed a Magnafuel 4703 to solve that problem, now on 22lbs the S480 is a damn rocket compared to the old setup. Its making a lot more power now!
Seems to be a lot less backpressure on the T6 housing as well, I can wastegate down to 14-15lbs to do boost by gear in 1st, then give it the beans up top. I have boost ramping in fairly slow and it still blows the tires off from highway speed (used to dead hook on the 88) so I'll need to slow the ramp a little more for street traction. It certainly spools faster then the 88mm, it cracks into positive pressure before I can get my foot down comes on at 2700RPM.
So while the ebay 88 had a good run the S480 is certainly an upgrade. Took a couple days to sort out but now I'm happy with my purchase!
TECH Fanatic
Joined: Jun 2013
Posts: 1,163
Likes: 16
From: Avon, Ohio
TECH Fanatic
Joined: Jun 2013
Posts: 1,163
Likes: 16
From: Avon, Ohio