Help with Boost Gauge and Blow Off valve vacuum - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

race24x · 05-03-2018, 11:42 PM

So I have a Kraftwerks supercharger that I installed. From their instructions, I cut the vacuum line on the drivers side of the throttle body and put in a T to the blow off valve. I placed another T there for the boost gauge and noticed I am not getting much boost. Like 3.5 PSI at 6000 and it makes boost very late. Where is and how is everyone putting their boost gauges in. I will be checking for boost leaks checking the blow off valve, but Kraftwerks has mentioned that maybe I want to put the gauge somewhere else too. Any ideas? Kraftwerks also says between 5 and 7 PSI is normal so I feel I may be short. I will also test with another boost gauge to be sure of what I am seeing. Eliminate the easy first.

0331Marine · 05-03-2018, 11:56 PM

I'm running a vacuum block.

race24x · 05-04-2018, 03:52 PM

Are you running that from the one vacuum line? Do you have any pictures? Maybe it doesnt matter that they are on the same leg. I was just wondering what others have been doing if they have seen the same issues.

fif_gen_powa · 05-04-2018, 04:01 PM

I have like 5 things tied into the same vacuum source, it shouldn't matter

race24x · 05-04-2018, 04:11 PM

OK I will move on to trouble shooting then. Look again for boost leaks check the gauge and vacuum line with another gauge. All of that fun stuff.

Abrz_ · 05-04-2018, 04:59 PM

Krapwerks sent me the wrong blower in my kit, they sent me a c38-81 never made more than 1.9pounds of boost at 6300rpm costing me dyno tune time/money. Make sure you got the c38-91/92 even then I'm barely making 4.5 pounds of boost. I checked everything out & I have no leaks

race24x · 05-04-2018, 08:34 PM

What did you make for HP and what are your mods. They advertise 600 crank which to me should be about 525 RWHP. I havent got it on the dyno yet but I am not seeing the boost like it sounds like you arent. I will be testing the gauge the vacuum line checking for boost leaks. They also say between 5 and 7 PSI, but it seems like 5 would be a reasonable amount.

KTMracing09 · 05-05-2018, 12:15 AM

I’m surprised theses kits actually sell with the small blower they come with at the same price as an ecs kit?

0331Marine · 05-05-2018, 09:44 AM

No pictures on this phone. But it's a Vibrant block. Running it off the brake booster.

race24x · 05-05-2018, 09:16 PM

My kit was very affordable but I wished I had talked to Jannetty before buying it I may have gone with the smaller pulley larger injectors and been more of what I expected.

stevieturbo · 05-06-2018, 03:31 PM

Quote:

Originally Posted by KTMracing09

I’m surprised theses kits actually sell with the small blower they come with at the same price as an ecs kit?

Rotrex do make some great units. But for a large V8 ? No.

05-03-2018, 11:42 PM	#1
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 418	Help with Boost Gauge and Blow Off valve vacuum So I have a Kraftwerks supercharger that I installed. From their instructions, I cut the vacuum line on the drivers side of the throttle body and put in a T to the blow off valve. I placed another T there for the boost gauge and noticed I am not getting much boost. Like 3.5 PSI at 6000 and it makes boost very late. Where is and how is everyone putting their boost gauges in. I will be checking for boost leaks checking the blow off valve, but Kraftwerks has mentioned that maybe I want to put the gauge somewhere else too. Any ideas? Kraftwerks also says between 5 and 7 PSI is normal so I feel I may be short. I will also test with another boost gauge to be sure of what I am seeing. Eliminate the easy first.

05-04-2018, 04:01 PM	#4
fif_gen_powa Drives: 2013 Camaro SS Turbo Join Date: Apr 2014 Location: South Florida Posts: 1,525	I have like 5 things tied into the same vacuum source, it shouldn't matter __________________ 388ci 91/104 Turbo TH400 8.3@164 https://instagram.com/turbo_ls3/

05-04-2018, 04:59 PM	#6
Abrz_ Drives: camaro 2ss/rs Join Date: Jun 2017 Location: Oxnard CA Posts: 46	Krapwerks sent me the wrong blower in my kit, they sent me a c38-81 never made more than 1.9pounds of boost at 6300rpm costing me dyno tune time/money. Make sure you got the c38-91/92 even then I'm barely making 4.5 pounds of boost. I checked everything out & I have no leaks __________________ 5th gen BTR turbo 3cam, AGP twin 57s /E85/fore dual 450s/vaporworx controller 19 SS Huron speed twin 62/62 turbos 18 ZL1 2650 / port / Holley / New Era Performance stage 3 pd cam / Frankenstein ported heads 9.4 @ 151 3500da @stalk_zl1

05-05-2018, 12:15 AM	#8
KTMracing09 Drives: 2SS/RS L99 ABM Join Date: Aug 2009 Location: Mechanicsville, Maryland Posts: 227	I’m surprised theses kits actually sell with the small blower they come with at the same price as an ecs kit? __________________ Rotofab CAI, 2" LT Headers/non catted, 3" Straight Pipe w/ X-Pipe, Elite Catch Can, GPI SS3 VVT, 9" 4000 Triple Disc, Yella Terra Ultralite Rocker Arms, MSD Super Conductor wires

05-03-2018, 11:56 PM	#2
0331Marine Drives: 2012 SS/RS MN6 Join Date: Mar 2016 Location: Covington Ga Posts: 783	I'm running a vacuum block.

05-04-2018, 03:52 PM	#3
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 418	Are you running that from the one vacuum line? Do you have any pictures? Maybe it doesnt matter that they are on the same leg. I was just wondering what others have been doing if they have seen the same issues.

05-04-2018, 04:11 PM	#5
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 418	OK I will move on to trouble shooting then. Look again for boost leaks check the gauge and vacuum line with another gauge. All of that fun stuff.

05-04-2018, 08:34 PM	#7
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 418	What did you make for HP and what are your mods. They advertise 600 crank which to me should be about 525 RWHP. I havent got it on the dyno yet but I am not seeing the boost like it sounds like you arent. I will be testing the gauge the vacuum line checking for boost leaks. They also say between 5 and 7 PSI, but it seems like 5 would be a reasonable amount.

05-05-2018, 09:44 AM	#9
0331Marine Drives: 2012 SS/RS MN6 Join Date: Mar 2016 Location: Covington Ga Posts: 783	No pictures on this phone. But it's a Vibrant block. Running it off the brake booster.

05-05-2018, 09:16 PM	#10
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 418	My kit was very affordable but I wished I had talked to Jannetty before buying it I may have gone with the smaller pulley larger injectors and been more of what I expected.