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Thread: turbo with blow through carb
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01-06-2007 #1
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turbo with blow through carb
Can I get some pros and cons of using this combo with a 302 chevy and a 4 speed auto in a first gen firebird. I have all the parts except for the carb.
Thanks
Dan
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01-07-2007 #2
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I would contact Kevin @ CSU for the carb......his service & product is really beyond exceptional.
I currently use a blow-through system.....drives great on the street & works even better once your foot is down ;)
-Carm'69 Firebird Twin Turbo SBC 400" Blow-through
9.80 @ 141 w/ 1.88 60-ft..... on 17's
9.21 @ 153 w/ 1.45 60-ft..... on PUMP GAS
8.60 @ 164 w/ 1.46 60-ft..... on RACE GAS
01-07-2007 #3
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I modified my 750 holley dbl pumper thats on my twin turbo vette and it runs really good. I used these instructions.
http://www.hangar18fabrication.com/blowthru.htmlTurbos, 1700.00
Hot Side, 1500.00
Cold Side, 1,000.00
Fuel System, 1,000.00
The look on the face of whomever the passenger is when the tires break loose at o say 70 mph or so........priceless
01-08-2007 #4
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Thats a great article as well if you want to tackle the carb modification yourself, i shouldnt of left that out of my other post!
Use a good fuel system as well, you can never shy on that
-Carm'69 Firebird Twin Turbo SBC 400" Blow-through
9.80 @ 141 w/ 1.88 60-ft..... on 17's
9.21 @ 153 w/ 1.45 60-ft..... on PUMP GAS
8.60 @ 164 w/ 1.46 60-ft..... on RACE GAS
01-08-2007 #5
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- Central Florida
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We are using a CSU on my buddies 67 nova it works great ad csu have been over the top on customer service and tech advice
01-09-2007 #6
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- Jan 2007
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- Gresham, Oregon
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Thanks for all the good info. I am sure that I will be using a dual T-3 set up. I think that it will be cheaper and easier than plumbing exhaust for a single turbo. So I think that I will go the cheap way and try to do it myself.
(hope its cheaper)
Dan
01-09-2007 #7
Starting The Transformation
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Definetly the cheaper way lol......now as for EASIER with a single, its possible but i think the outcome is the same.
On another note, KEVIN from CSU just messaged me & follwing up - Hows that for a great product, service & support...hands down CSU!!!!!
-Carm'69 Firebird Twin Turbo SBC 400" Blow-through
9.80 @ 141 w/ 1.88 60-ft..... on 17's
9.21 @ 153 w/ 1.45 60-ft..... on PUMP GAS
8.60 @ 164 w/ 1.46 60-ft..... on RACE GAS
04-19-2007 #8
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- Mar 2005
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What/who is CSU??
04-19-2007 #9
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- Texas
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Those carbs work great. Alex's car (twin turbo Camaro run-in) has a CSU Holley 850 on it. I can honestly say that the only change I need to make is one step smaller on the low speed air bleeds. It has a slight stumble at very low speed/low rpm at light throttle. Wide open (well, almost wide open. I haven't floored it yet) performance seems to be pretty close. We are installing data logging equipment so air/fuel ratios can be checked. Along w/IAT temps and boost levels.
Something else. If you happen to have a Holley HP series carb laying around, CSU can mod it for you. Lowering the cost of having to buy one of their "cores".
I did pull the bowels off, before I installed it. The secondary power valve looks more like a big jet w/a suction tube pointing bownward and the rear jets have extensions. It looks pretty cool w/the choke horn milled off.
Oh yeah, one more thing. It's not cold natured at all. It will idle w/foot off the gas within a 1 minute warm up.
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