Looking for suggestions on maxing my blown C5 out!
04-30-2018, 04:21 AM
#1
Racer
Thread Starter
Looking for suggestions on maxing my blown C5 out!(Edit:New Blower now)
I have a 01 C5 currently making 518/473 to the wheels. My best 1/4 mile runs so far babying it out the hole cause I’m scared of breaking my rear are 11.4 ET @119 mph 1.7 60’. I’m wanting to get the best 1/4 mile performance out my car and set up.Let me give you the run down now and then what is happening to it in a few weeks.
NOW:
346 ls1 bone stock motor with 241 heads
ls6 intake
1-7/8” headers
stock axle-back
stock Drivetrain A4 w/2.73 rear
yank 3400 stall
Esc 1500 blower with 3.47 upper and powerbond 7.5 balancer
restrictor plate still in making around 7-8 lbs
60 lb injectors
alky meth single nozzle kit
mickey Thompson street SS’s 285/40/18’s on c7 z06 replicas
WHAT I HAVE FOR THE REBUILD SO FAR:
using same block and cubic inches
diamond -2cc forged flat top pistons
callies compstar rods
stock crank
cartek flip drive
built 3rib c5 housing with 3.42 gear and c6z06 guts and pinion support
FIC 1000cc injectors
radium billet fuel rails
futral blower cam will be specked out during build
Im on the fence about a few things. 1. Should I do any work to the 241 heads, 2. replace them with some trickflows or higher flowing heads..3. Just add springs to the 241’s and let them rip? I hear some say I can get what this blower has to offer with just the 241’s and that they can hold 15-18 lbs pretty good..We plan on pulling the plate out for sure but I’m wanting to pulley down to like a 3.125 or 3.25 whatever size that will have me at max impeller speed at shift. Paxton says 52000 max impeller speed.i just want to get the most power out this 346 and blower that I can get or whatever will get me the best ET. 700 plus rwhp would be nice if I can get it. Thanks for any input.
NOW:
346 ls1 bone stock motor with 241 heads
ls6 intake
1-7/8” headers
stock axle-back
stock Drivetrain A4 w/2.73 rear
yank 3400 stall
Esc 1500 blower with 3.47 upper and powerbond 7.5 balancer
restrictor plate still in making around 7-8 lbs
60 lb injectors
alky meth single nozzle kit
mickey Thompson street SS’s 285/40/18’s on c7 z06 replicas
WHAT I HAVE FOR THE REBUILD SO FAR:
using same block and cubic inches
diamond -2cc forged flat top pistons
callies compstar rods
stock crank
cartek flip drive
built 3rib c5 housing with 3.42 gear and c6z06 guts and pinion support
FIC 1000cc injectors
radium billet fuel rails
futral blower cam will be specked out during build
Im on the fence about a few things. 1. Should I do any work to the 241 heads, 2. replace them with some trickflows or higher flowing heads..3. Just add springs to the 241’s and let them rip? I hear some say I can get what this blower has to offer with just the 241’s and that they can hold 15-18 lbs pretty good..We plan on pulling the plate out for sure but I’m wanting to pulley down to like a 3.125 or 3.25 whatever size that will have me at max impeller speed at shift. Paxton says 52000 max impeller speed.i just want to get the most power out this 346 and blower that I can get or whatever will get me the best ET. 700 plus rwhp would be nice if I can get it. Thanks for any input.
Last edited by EgoKlr; 05-24-2018 at 07:00 AM. Reason: Keep leaving stuff out
04-30-2018, 07:34 AM
#3
Racer
Thread Starter
04-30-2018, 12:11 PM
#5
Melting Slicks
Not sure what step up ratio is in the 1500SL but based on their standard 3.61:1 ratio and a 7.5" crank pulley you will reach 51,761RPM by 6,500 RPM with a 3.4 pulley.
If it has the 3.5 step up ratio you can hit 52,500 RPM with a 3.25" pulley.
If it has the 3.5 step up ratio you can hit 52,500 RPM with a 3.25" pulley.
04-30-2018, 04:36 PM
#6
Racer
Thread Starter
I just got off the phone with Paxton and it’s actually rated at 55k with a 3.45.1 ratio. I had been thinking for the past few months it’s 52k.
04-30-2018, 07:39 PM
#7
Racer
Thread Starter
Anyone have a similar setup that may can give me an idea on what power level I can maybe achieve with this setup with the heads I currently have and if some better heads would even be needed? Would like to get 750 rwhp or close to it.
Last edited by EgoKlr; 04-30-2018 at 07:40 PM. Reason: forgot something
04-30-2018, 07:55 PM
#8
Racer
Thread Starter
05-01-2018, 12:12 AM
#9
I am in the middle of a similar situation. Some decision I made after being educated on the subject:
Change the fuel system to e85
Put your money into the rings, which may require custom pistons
Make sure the cam is a custom grind the meets your needs/goals
I considered and choose Wiesco pistons and K1 rods
Find a builder that pays attention to details and explains everything along the way
Change the fuel system to e85
Put your money into the rings, which may require custom pistons
Make sure the cam is a custom grind the meets your needs/goals
I considered and choose Wiesco pistons and K1 rods
Find a builder that pays attention to details and explains everything along the way
05-01-2018, 12:18 AM
#10
Drifting
The nice thing about changing the balancer is, you get to keep a bigger pulley on the blower and increase belt wrap and decrease slip. You can still run a 6 rib belt on a 8 rib pulley. So you do not have to change the blower pulley.
As far as heads go it will gain power the better heads you do. Better heads will flow air more efficiently increasing power. With heads you might see less boost on your gauge but will be flowing more air. Boost is measuring the restriction not the CFM being flowed.
As far as heads go it will gain power the better heads you do. Better heads will flow air more efficiently increasing power. With heads you might see less boost on your gauge but will be flowing more air. Boost is measuring the restriction not the CFM being flowed.
05-01-2018, 02:19 AM
#11
Racer
Thread Starter
The nice thing about changing the balancer is, you get to keep a bigger pulley on the blower and increase belt wrap and decrease slip. You can still run a 6 rib belt on a 8 rib pulley. So you do not have to change the blower pulley.
As far as heads go it will gain power the better heads you do. Better heads will flow air more efficiently increasing power. With heads you might see less boost on your gauge but will be flowing more air. Boost is measuring the restriction not the CFM being flowed.
As far as heads go it will gain power the better heads you do. Better heads will flow air more efficiently increasing power. With heads you might see less boost on your gauge but will be flowing more air. Boost is measuring the restriction not the CFM being flowed.
05-01-2018, 02:28 AM
#12
Racer
Thread Starter
I am in the middle of a similar situation. Some decision I made after being educated on the subject:
Change the fuel system to e85
Put your money into the rings, which may require custom pistons
Make sure the cam is a custom grind the meets your needs/goals
I considered and choose Wiesco pistons and K1 rods
Find a builder that pays attention to details and explains everything along the way
Change the fuel system to e85
Put your money into the rings, which may require custom pistons
Make sure the cam is a custom grind the meets your needs/goals
I considered and choose Wiesco pistons and K1 rods
Find a builder that pays attention to details and explains everything along the way
Last edited by EgoKlr; 05-01-2018 at 02:37 AM.
05-01-2018, 11:14 AM
#13
Race Director
Member Since: Dec 2010
Location: Atlanta, GA
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2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
not sure if the 241s will do it but you can do it with a set of 243s and those are pretty cheap... mine makes about 850 with stock untouched 243s
Last edited by neutron82; 05-01-2018 at 11:14 AM.
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EgoKlr (05-01-2018)
05-01-2018, 07:02 PM
#14
Racer
Thread Starter
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EgoKlr (05-02-2018)
05-05-2018, 06:17 PM
#16
Burning Brakes
The flip drive works and stops belt slip but adding a OD balance will help with belt wrap, which is key and gives you more pulley options later on.
Switch your fuel system over to e85. This is the biggest key to he whole system.
I wouldn't worry about heads, if you are dead set then do a 243's or comparable.i would look more into getting a bigger blower so your not spinning yours to the max creating a lot of heat in the process. Do a 2200 with a restrictor and your set.
Switch your fuel system over to e85. This is the biggest key to he whole system.
I wouldn't worry about heads, if you are dead set then do a 243's or comparable.i would look more into getting a bigger blower so your not spinning yours to the max creating a lot of heat in the process. Do a 2200 with a restrictor and your set.
The following users liked this post:
EgoKlr (05-05-2018)
05-05-2018, 09:35 PM
#17
Racer
Thread Starter
The flip drive works and stops belt slip but adding a OD balance will help with belt wrap, which is key and gives you more pulley options later on.
Switch your fuel system over to e85. This is the biggest key to he whole system.
I wouldn't worry about heads, if you are dead set then do a 243's or comparable.i would look more into getting a bigger blower so your not spinning yours to the max creating a lot of heat in the process. Do a 2200 with a restrictor and your set.
Switch your fuel system over to e85. This is the biggest key to he whole system.
I wouldn't worry about heads, if you are dead set then do a 243's or comparable.i would look more into getting a bigger blower so your not spinning yours to the max creating a lot of heat in the process. Do a 2200 with a restrictor and your set.
Last edited by EgoKlr; 05-05-2018 at 09:37 PM. Reason: Spelling
05-09-2018, 08:27 AM
#18
Racer
Thread Starter
Well I stuck with my stock heads just gonna replace with good springs and I bought a 2200r from Chris yesterday at ECS. Can’t wait to get this motor rebuilt and see what this 2200r is all about in a few weeks!
Last edited by EgoKlr; 05-09-2018 at 08:30 AM.
05-09-2018, 01:53 PM
#19
Burning Brakes
Nice upgrade. Now you can turn it up and run a restrictor plate so you hit "full" boost earlier. That or just say **** it and let her eat. You going to make the switch over to e85 when you start your rebuild? That will really help out a bunch with heat and making serious power
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EgoKlr (05-09-2018)
05-09-2018, 02:03 PM
#20
Racer
Thread Starter
Nice upgrade. Now you can turn it up and run a restrictor plate so you hit "full" boost earlier. That or just say **** it and let her eat. You going to make the switch over to e85 when you start your rebuild? That will really help out a bunch with heat and making serious power