Help me pick a Blow-Through Carb, please!
03-29-2010, 10:21 PM
#1
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Help me pick a Blow-Through Carb, please! Some info: 5.3L LM7 stock - Jr. Intake with MSD. 2800 stall 200R4 TC76 Turbo
What Blow-through carb should I pick?
1. Mighty Demon 575cfm $580
2 CSU 750cfm $925
3. Quick fuel 750cfm $780
4. Pro systems 750cfm $900
5 Have CSU build my Holley DP $500
Money is always a concern but the right decision is always more important. Thank you in advance.
What Blow-through carb should I pick?
1. Mighty Demon 575cfm $580
2 CSU 750cfm $925
3. Quick fuel 750cfm $780
4. Pro systems 750cfm $900
5 Have CSU build my Holley DP $500
Money is always a concern but the right decision is always more important. Thank you in advance.
03-30-2010, 08:05 AM
#2
Some info: 5.3L LM7 stock - Jr. Intake with MSD. 2800 stall 200R4 TC76 Turbo
What Blow-through carb should I pick?
1. Mighty Demon 575cfm $580 - NO !!!!
2 CSU 750cfm $925 - good
3. Quick fuel 750cfm $780 - good
4. Pro systems 750cfm $900 - ???
5 Have CSU build my Holley DP $500 -
best bang for $ if your baseplate is good.
Money is always a concern but the right decision is always more important. Thank you in advance.
What Blow-through carb should I pick?
1. Mighty Demon 575cfm $580 - NO !!!!
2 CSU 750cfm $925 - good
3. Quick fuel 750cfm $780 - good
4. Pro systems 750cfm $900 - ???
5 Have CSU build my Holley DP $500 -
best bang for $ if your baseplate is good.
Money is always a concern but the right decision is always more important. Thank you in advance.
I wish I had back all the time I wasted on the Mighty Demon I had for my last blow through deal. The car ran better with my home modded holley.
The demon was pretty though
Send your holley off to CSU and they will set you up.
Having the pro's set up the carb will get your tune close right out of the gate.
Your stockish turbo combination shouldn't be too hard to tune though.
Good luck,
Jim
03-30-2010, 09:26 AM
#3
I wish I had back all the time I wasted on the Mighty Demon I had for my last blow through deal. The car ran better with my home modded holley.
The demon was pretty though
Send your holley off to CSU and they will set you up.
Having the pro's set up the carb will get your tune close right out of the gate.
Your stockish turbo combination shouldn't be too hard to tune though.
Good luck,
Jim
The demon was pretty though
Send your holley off to CSU and they will set you up.
Having the pro's set up the carb will get your tune close right out of the gate.
Your stockish turbo combination shouldn't be too hard to tune though.
Good luck,
Jim
you might go ahead and get some BRPVs incase you decide to up the boost later.
03-30-2010, 04:07 PM
#6
i would go with csu new or modded.
i built one 750 hp and the car its on makes 550rw with t76. and afr is pretty safe. across the board.not bad for first time out.
but every car and combo is diff.
im building another for even higher power ls motor. shooting to support around 700rw.
but if it goes boom, it will be on my own car
i built one 750 hp and the car its on makes 550rw with t76. and afr is pretty safe. across the board.not bad for first time out.
but every car and combo is diff.
im building another for even higher power ls motor. shooting to support around 700rw.
but if it goes boom, it will be on my own car
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03-31-2010, 11:37 AM
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Alright thanks everybody. I just hate how little info or documented builds are on this. Seems like everybody with a blow thru car is a pro racer. I don't see any street cars documented builds. My concern about CSU is that they mod holley carbs and they all run super rich (at least most), from what i read. Grrrrr
03-31-2010, 01:25 PM
#9
Alright thanks everybody. I just hate how little info or documented builds are on this. Seems like everybody with a blow thru car is a pro racer. I don't see any street cars documented builds. My concern about CSU is that they mod holley carbs and they all run super rich (at least most), from what i read. Grrrrr
Go over to theturboforums.com there are TONS of blow thru cars over there (both street and race.....probably more street).
A BRPV will allow you to cruise lean and won't richen up until (adjustable) a couple of PSI (or more).
03-31-2010, 02:46 PM
#10
If you have an advanced understanding of carb tuning and are comfortable setting up the air bleeds, power valve enrichment circuit, and jetting then you can dial in the low speed and cruise to work ok. EFI like manners are not easily achievable.
Most people are too intimidated to adjust these settings or make too many changes at once and get lost.
EFI like manners are not easily achievable, and I would not expect any carb company to nail the tune over the phone on the first attempt.
Low boost tuning without an intercooler is a piece of cake, but jetting up to higher power levels and using an intercooler make the tip in/cruise fueling a challenge.
The whole blowthrough deal motivated me to move to EFI.
The weather changes too quick here in Chi-town and I got sick of tuning it all the time.
Most people are too intimidated to adjust these settings or make too many changes at once and get lost.
EFI like manners are not easily achievable, and I would not expect any carb company to nail the tune over the phone on the first attempt.
Low boost tuning without an intercooler is a piece of cake, but jetting up to higher power levels and using an intercooler make the tip in/cruise fueling a challenge.
The whole blowthrough deal motivated me to move to EFI.
The weather changes too quick here in Chi-town and I got sick of tuning it all the time.
03-31-2010, 10:03 PM
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I'm definitely a beginner when it comes to tuning and stuff. I understand everything it was mentioned as far as EFI vs Carb. I'm invested enough on it right now that its worth a try. It's always good getting other opinions and I think I have a clearer understanding. Thanks a bunch again everybody.
