Blow thru Setups & Numbers
06-14-2011, 10:37 AM
#21
Launching!
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8.8.1 CR
It made good power at 10 psi. The whole combo was new. car,motor,trans, chassis so I wanted to take it easy first time out. We maxed the carb in terms of fuel inlets. We had to step up to a larger inlet needle and seat combo. And no to being limited to boost level with a carb. We keep the boost low till we were comfy wiith the whole package,plus we needed other things like a chute,and chassis cert. and so on.
It made good power at 10 psi. The whole combo was new. car,motor,trans, chassis so I wanted to take it easy first time out. We maxed the carb in terms of fuel inlets. We had to step up to a larger inlet needle and seat combo. And no to being limited to boost level with a carb. We keep the boost low till we were comfy wiith the whole package,plus we needed other things like a chute,and chassis cert. and so on.
06-14-2011, 01:52 PM
#22
Teching In
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Stock cube ls1 with Tsp 228R cam and mildly ported 241 heads. 4l80e and 9". Pro systems 750 carb. 6-7 lbs boost. MSD 6010 (love the 6010, especially for a street car) 7.1 et @ 99 mph 1/8th mile. Full interior and a/c. Has more but only been to the track once.
Complaints: fuel smell, and after driving around in the texas heat and parking, if the car sits for 30 min or more the fuel boils in the bowls and floods the motor making it hard to start. tried a phenolic spacer with no luck.
Complaints: fuel smell, and after driving around in the texas heat and parking, if the car sits for 30 min or more the fuel boils in the bowls and floods the motor making it hard to start. tried a phenolic spacer with no luck.
06-14-2011, 03:57 PM
#23
8.8.1 CR
It made good power at 10 psi. The whole combo was new. car,motor,trans, chassis so I wanted to take it easy first time out. We maxed the carb in terms of fuel inlets. We had to step up to a larger inlet needle and seat combo. And no to being limited to boost level with a carb. We keep the boost low till we were comfy wiith the whole package,plus we needed other things like a chute,and chassis cert. and so on.
It made good power at 10 psi. The whole combo was new. car,motor,trans, chassis so I wanted to take it easy first time out. We maxed the carb in terms of fuel inlets. We had to step up to a larger inlet needle and seat combo. And no to being limited to boost level with a carb. We keep the boost low till we were comfy wiith the whole package,plus we needed other things like a chute,and chassis cert. and so on.
2nd (I don't care about this to much) but what would be the mpg difference be between the 2?
06-15-2011, 09:33 AM
#24
Launching!
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Our set-up is very tame and drives nicely on the street. For cruising around we just use pump gas but don't boost it. If we wanna play on the street we just add the race gas back to the tank.
06-16-2011, 08:53 AM
#25
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Stock cube ls1 with Tsp 228R cam and mildly ported 241 heads. 4l80e and 9". Pro systems 750 carb. 6-7 lbs boost. MSD 6010 (love the 6010, especially for a street car) 7.1 et @ 99 mph 1/8th mile. Full interior and a/c. Has more but only been to the track once.
Complaints: fuel smell, and after driving around in the texas heat and parking, if the car sits for 30 min or more the fuel boils in the bowls and floods the motor making it hard to start. tried a phenolic spacer with no luck.
Complaints: fuel smell, and after driving around in the texas heat and parking, if the car sits for 30 min or more the fuel boils in the bowls and floods the motor making it hard to start. tried a phenolic spacer with no luck.
06-16-2011, 09:19 AM
#26
Launching!
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Make sure you get a custom blow thru carb like a csu or a carb-shop. I tried to get it set up myself and it worked but the drivability suffered. It was so much better once I got a 1150 from csu. 555 bbc f2 runs 8.12 @171 3600 lbs pumgas car. tryin to get into 7's
06-16-2011, 04:05 PM
#28
Those are some nice numbers. What is your car like on the street? What compression and how much boost are you running?
Congrats and good luck on hittin those 7s.
06-22-2011, 09:25 AM
#32
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Curious to how you guys making 6-700hp are running your fuel lines off ur regulator? My aeromotive regulator is setup for -10 feed -8 return and 2 -6 feeds to carb, I'm in the process of plumbing in a -6 to each carb bowl, I was running a single -6 into a dual fuel rail, but I had a problem of sucking the bowl dry and going lean. Just curious how you guys are doing your setups?
06-22-2011, 01:44 PM
#33
-10 feed from pump to reg
-6 reg to carb
-8 return to tank
and a big pump to keep the flow above what the motor needs. if you were sucking the bowls dry, then your fuel pump wasn't enough. don't skimp on a fuel system when it comes to fi. buy quality stuff the first time. and over estimate your needs for power level. example, i plan to put down near 700hp but my fuel system will support close to 1200. allows me to also run e85 without concern, and always upgrade my power down the road. big pump, big lines to and back from motor
-6 reg to carb
-8 return to tank
and a big pump to keep the flow above what the motor needs. if you were sucking the bowls dry, then your fuel pump wasn't enough. don't skimp on a fuel system when it comes to fi. buy quality stuff the first time. and over estimate your needs for power level. example, i plan to put down near 700hp but my fuel system will support close to 1200. allows me to also run e85 without concern, and always upgrade my power down the road. big pump, big lines to and back from motor
06-22-2011, 01:54 PM
#34
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I haven't skimped out on the fuel system, its all aeromotive, I got a A1000 pump, so it shouldn't be anywhere's close to the limits of that pump. I assumed I didn't have enough volume in the single -6 line. Pressure wise on the transbrake I can get it up to almost 14psi fuel pressure which is about 4lbs of boost.
06-23-2011, 01:03 AM
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06-23-2011, 11:46 AM
#37
I haven't skimped out on the fuel system, its all aeromotive, I got a A1000 pump, so it shouldn't be anywhere's close to the limits of that pump. I assumed I didn't have enough volume in the single -6 line. Pressure wise on the transbrake I can get it up to almost 14psi fuel pressure which is about 4lbs of boost.
i'm personally not a fan of a1000 pumps. had em before and had them fail. they really need to have a large gauge power and ground. all pumps should, but these always seem finiky. anyways, a pump that claims dual capabilities of efi and carb just doesn't make me comfortable. 2 different fuel delivery methods, flow at very different psi. i would buy a purpose built, high hp carb pump. i personally run magnafuel.
06-23-2011, 12:34 PM
#38
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i'm personally not a fan of a1000 pumps. had em before and had them fail. they really need to have a large gauge power and ground. all pumps should, but these always seem finiky. anyways, a pump that claims dual capabilities of efi and carb just doesn't make me comfortable. 2 different fuel delivery methods, flow at very different psi. i would buy a purpose built, high hp carb pump. i personally run magnafuel.
I also have a -10 feed from pump to regulator and a -8 return
