Small Turbo on 6.2
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On The Tree
Joined: Nov 2018
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Small Turbo on 6.2 I have a forged rod/piston ls3 in an 09 avalanche. Set up for N.A. (11:1 comp) but have decided to go with boost. Have a trick t4 hot side with a 3 exhaust.
I shift at 6300 and have 4.10 gears (31.5 tire) and 218/226 cam and ZL1 Converter
looking for a turbo to come on boost quick and hold. Not looking for more than 550-600whp.
currently have 50# flex fuel injectors that are just under ls9 size flow. Should I upgrade to deka 60s?
I ran across a s369sxe local and have heard great things about them. Will this suffice and not have to jump up to a 7875 VS Racing?
also have a procession 7175 local thats very similar to the Borg. Im thinking 8-12# max so either should suffice?
I shift at 6300 and have 4.10 gears (31.5 tire) and 218/226 cam and ZL1 Converter
looking for a turbo to come on boost quick and hold. Not looking for more than 550-600whp.
currently have 50# flex fuel injectors that are just under ls9 size flow. Should I upgrade to deka 60s?
I ran across a s369sxe local and have heard great things about them. Will this suffice and not have to jump up to a 7875 VS Racing?
also have a procession 7175 local thats very similar to the Borg. Im thinking 8-12# max so either should suffice?
I have a forged rod/piston ls3 in an 09 avalanche. Set up for N.A. (11:1 comp) but have decided to go with boost. Have a trick t4 hot side with a 3 exhaust.
I shift at 6300 and have 4.10 gears (31.5 tire) and 218/226 cam and ZL1 Converter
looking for a turbo to come on boost quick and hold. Not looking for more than 550-600whp.
currently have 50# flex fuel injectors that are just under ls9 size flow. Should I upgrade to deka 60s?
I ran across a s369sxe local and have heard great things about them. Will this suffice and not have to jump up to a 7875 VS Racing?
also have a procession 7175 local thats very similar to the Borg. Im thinking 8-12# max so either should suffice?
I shift at 6300 and have 4.10 gears (31.5 tire) and 218/226 cam and ZL1 Converter
looking for a turbo to come on boost quick and hold. Not looking for more than 550-600whp.
currently have 50# flex fuel injectors that are just under ls9 size flow. Should I upgrade to deka 60s?
I ran across a s369sxe local and have heard great things about them. Will this suffice and not have to jump up to a 7875 VS Racing?
also have a procession 7175 local thats very similar to the Borg. Im thinking 8-12# max so either should suffice?
A much better "small" turbo option would be a S472sxe
https://www.borgwarner.com/go/Y37UK6
Andrew
Thread Starter
On The Tree
Joined: Nov 2018
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I was on the fence with a 7875 gen 3 and honestly still debating if I should go that route. I hear guys on 6.2 make good power to 6500 with them and some dont make power over 5700. FIS talked me into the s478 basically saying the 75 turbine would create way too much back pressure. Im planning 8-12# for now and seeing how thr high compression does on 93.
I was on the fence with a 7875 gen 3 and honestly still debating if I should go that route. I hear guys on 6.2 make good power to 6500 with them and some dont make power over 5700. FIS talked me into the s478 basically saying the 75 turbine would create way too much back pressure. Im planning 8-12# for now and seeing how thr high compression does on 93.
Methanol injection is in your future lol.
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Thread Starter
On The Tree
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Do you think a 7875 .96 would be better? I see a lot of Camaro SS - LS3 guys run the Huron kit with this size turbo and 3 DP.
I dont min running meth if needed but its not a race truck just a daily driver.
I called FIS and they recommended this turbo bc the 7875 causes a lot of back pressure. Its more for 5.3s but on 6.0/6.2 boost would come on quick with it.
I also thought of the VS 76/89 which is a 82 turbine wheel.
I dont min running meth if needed but its not a race truck just a daily driver.
I called FIS and they recommended this turbo bc the 7875 causes a lot of back pressure. Its more for 5.3s but on 6.0/6.2 boost would come on quick with it.
I also thought of the VS 76/89 which is a 82 turbine wheel.
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Do you think a 7875 .96 would be better? I see a lot of Camaro SS - LS3 guys run the Huron kit with this size turbo and 3 DP.
I dont min running meth if needed but its not a race truck just a daily driver.
I called FIS and they recommended this turbo bc the 7875 causes a lot of back pressure. Its more for 5.3s but on 6.0/6.2 boost would come on quick with it.
I also thought of the VS 76/89 which is a 82 turbine wheel.
I dont min running meth if needed but its not a race truck just a daily driver.
I called FIS and they recommended this turbo bc the 7875 causes a lot of back pressure. Its more for 5.3s but on 6.0/6.2 boost would come on quick with it.
I also thought of the VS 76/89 which is a 82 turbine wheel.
But too much torque down low causes its own problems with detonation and stress on the engine rotating assembly and transmission.
If you were leaving it in drive and letting the PCM do the shifting than yeah, I'd say the 7875 but I think FIS recommended the S478 because your shift point was much higher.
You may find yourself wanting to shift even higher than that once you get it going, I was shifting my S484 LS1 car at 6,500rpm but it was way happier shifting at 7,000-7,500rpm.
Find a good tuner who knows LS engines, be aggressive with the timing out of boost to help get it lit and it may surprise you.
Thread Starter
On The Tree
Joined: Nov 2018
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That was my thinking was playing with the timing. Its a big heavy beast tho but the 7875 next gen on a .96 ar with a 3-3.5 DP would be a lot easier to install. If I only ran 8# I would be close to 600whp being that its at 400whp NA. Having the K1 forged rods might help with the early torque unless its more an issue with the bearings.
my goal it to make it feel as fast as my c6 lol. Being that its twice the weight then I need twice the power. Hence the 650-700 goal. I do have e85 that I could use. Its about a 30 mins drive but not always dead nuts e85.
my goal it to make it feel as fast as my c6 lol. Being that its twice the weight then I need twice the power. Hence the 650-700 goal. I do have e85 that I could use. Its about a 30 mins drive but not always dead nuts e85.
That was my thinking was playing with the timing. Its a big heavy beast tho but the 7875 next gen on a .96 ar with a 3-3.5 DP would be a lot easier to install. If I only ran 8# I would be close to 600whp being that its at 400whp NA. Having the K1 forged rods might help with the early torque unless its more an issue with the bearings.
my goal it to make it feel as fast as my c6 lol. Being that its twice the weight then I need twice the power. Hence the 650-700 goal. I do have e85 that I could use. Its about a 30 mins drive but not always dead nuts e85.
my goal it to make it feel as fast as my c6 lol. Being that its twice the weight then I need twice the power. Hence the 650-700 goal. I do have e85 that I could use. Its about a 30 mins drive but not always dead nuts e85.
I'd leave it in drive, run as much boost as possible safely on pump gas and let the computer shift and utilize the six-speed auto with the big torque it'll make.
You won't have the high rpm charge, but you can't have it both ways and since you have an auto that'll downshift, I'd rather have the boat loads of torque, it'll be way more fun.
Sounds like a fun build. Years ago Kurt Urban turbocharged a Silverado SS and it went 12s.
You can control boost thru the holley so obviously you and the tuner would need to work a plan.
I've used @Project GatTagO (Andrew) for tuning, he's great. He worked for Holley in the past and knows the Holley ECUs quite well. Bonus he's a nice guy and I appreciated his patience when I was asking a lot of questions. He's helped me with some track side tuning too at LS Fest.
You can control boost thru the holley so obviously you and the tuner would need to work a plan.
I've used @Project GatTagO (Andrew) for tuning, he's great. He worked for Holley in the past and knows the Holley ECUs quite well. Bonus he's a nice guy and I appreciated his patience when I was asking a lot of questions. He's helped me with some track side tuning too at LS Fest.
Sounds like a fun build. Years ago Kurt Urban turbocharged a Silverado SS and it went 12s.
You can control boost thru the holley so obviously you and the tuner would need to work a plan.
I've used @Project GatTagO (Andrew) for tuning, he's great. He worked for Holley in the past and knows the Holley ECUs quite well. Bonus he's a nice guy and I appreciated his patience when I was asking a lot of questions. He's helped me with some track side tuning too at LS Fest.
You can control boost thru the holley so obviously you and the tuner would need to work a plan.
I've used @Project GatTagO (Andrew) for tuning, he's great. He worked for Holley in the past and knows the Holley ECUs quite well. Bonus he's a nice guy and I appreciated his patience when I was asking a lot of questions. He's helped me with some track side tuning too at LS Fest.
As I recall, Kurt used a 67mm turbo on a 6.0L truck
Andrew
Thread Starter
On The Tree
Joined: Nov 2018
Posts: 166
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Will need to find a new tuner. Im debating on purchasing hp tuners and running logs to find a good remote tuner. Im using an innovate Motorsports boost controller/WB. Plan to run 1 O2 in the passenger crossover and the other 02 in the downpipe. Just past that O2 Ill plug in the WB.
Will need to find a new tuner. Im debating on purchasing hp tuners and running logs to find a good remote tuner. Im using an innovate Motorsports boost controller/WB. Plan to run 1 O2 in the passenger crossover and the other 02 in the downpipe. Just past that O2 Ill plug in the WB.
He'll go back and forth with you until you're satisfied with how the car runs.
I've been very happy with his tunes, both cars have been pump gas in the 14ish lbs. range, both have been running for years and would get abused regularly lol.
Patrick Guerra
The Guerra Group, Inc. |Pat G Tuning
Office: 114 Spokane Avenue | Victoria, TX 77904
Shop: 5002 Lingo Lane | Victoria, TX 77904
361.576.5917 o |361.576.5928 f |713.306.9990 c
patrick.guerragroup@gmail.com
