Lm7 swap into 83 chevy short bed.
04-08-2014, 10:58 AM
#21
Thanks bro. I have Mustang 30 or 32's which are good for 43lbs at 58psi. I plan to make 500whp and leave it be, so that should be enough.
04-08-2014, 11:09 AM
#22
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04-08-2014, 03:28 PM
#24
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what would you guys suggest? what size injectors for what iam doing?? i have a general idea but need some more options, turbo is s476,1.32 ar but have a 1.10 housing. not going to be running a bunch of boost like i said 7-12 psi max, will be my DD. any input will be sweet.thanks
04-08-2014, 04:50 PM
#25
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This is just my opinion, but I wouldn't run the corvette fuel pressure regulator/filter for a boosted application.
I am running one now without the turbo but when I setup the turbo it will go away.
The problem is your running 58psi or whatever at the rail at like 3500rpm or something and then you hammer the gas. Your big injectors will start dumping in fuel to meet your commanded AFR. Since the corvette FPR is back near the pump you will have all that fuel line to fill back up with 58+psi, in the meantime you will be running lean. Lean conditions kill engines.
Ideally you would have the fuel line coming into the fuel rail directly from the pump(s), then your fuel pressure regulator (boost referenced) is at the end of the other side of the rail and the return goes all the way back to the tank.
That way your fuel rail is always getting enough fuel and whatever extra you have is going back to the tank. At a tip in throttle situation you wont run lean if you have enough pump.
I'll be running two walbro 255s or one of the dual walbro racetronics setups.
I am running one now without the turbo but when I setup the turbo it will go away.
The problem is your running 58psi or whatever at the rail at like 3500rpm or something and then you hammer the gas. Your big injectors will start dumping in fuel to meet your commanded AFR. Since the corvette FPR is back near the pump you will have all that fuel line to fill back up with 58+psi, in the meantime you will be running lean. Lean conditions kill engines.
Ideally you would have the fuel line coming into the fuel rail directly from the pump(s), then your fuel pressure regulator (boost referenced) is at the end of the other side of the rail and the return goes all the way back to the tank.
That way your fuel rail is always getting enough fuel and whatever extra you have is going back to the tank. At a tip in throttle situation you wont run lean if you have enough pump.
I'll be running two walbro 255s or one of the dual walbro racetronics setups.
04-08-2014, 05:49 PM
#26
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This is just my opinion, but I wouldn't run the corvette fuel pressure regulator/filter for a boosted application.
I am running one now without the turbo but when I setup the turbo it will go away.
The problem is your running 58psi or whatever at the rail at like 3500rpm or something and then you hammer the gas. Your big injectors will start dumping in fuel to meet your commanded AFR. Since the corvette FPR is back near the pump you will have all that fuel line to fill back up with 58+psi, in the meantime you will be running lean. Lean conditions kill engines.
Ideally you would have the fuel line coming into the fuel rail directly from the pump(s), then your fuel pressure regulator (boost referenced) is at the end of the other side of the rail and the return goes all the way back to the tank.
That way your fuel rail is always getting enough fuel and whatever extra you have is going back to the tank. At a tip in throttle situation you wont run lean if you have enough pump.
I'll be running two walbro 255s or one of the dual walbro racetronics setups.
I am running one now without the turbo but when I setup the turbo it will go away.
The problem is your running 58psi or whatever at the rail at like 3500rpm or something and then you hammer the gas. Your big injectors will start dumping in fuel to meet your commanded AFR. Since the corvette FPR is back near the pump you will have all that fuel line to fill back up with 58+psi, in the meantime you will be running lean. Lean conditions kill engines.
Ideally you would have the fuel line coming into the fuel rail directly from the pump(s), then your fuel pressure regulator (boost referenced) is at the end of the other side of the rail and the return goes all the way back to the tank.
That way your fuel rail is always getting enough fuel and whatever extra you have is going back to the tank. At a tip in throttle situation you wont run lean if you have enough pump.
I'll be running two walbro 255s or one of the dual walbro racetronics setups.
04-08-2014, 07:12 PM
#27
Absolutely not. You need a boost referenced regulator. Only 75ish bucks and required if you want to make tuning possible over 4-5 psi. As far as injectors go, 60s can be had quite cheap and are good for 600ish hp depending on your fuel. I used flex injectors on my last turbo setup and made a little over 500 hp with them. I wouldn't recommend it though bc there is no room for error with them.
04-08-2014, 08:43 PM
#28
I have a Weldon boost referenced FPR for my setup. I always knew I was going turbo so I bought everything accordingly..except for a good external pump. I did reaad that with a Ractronix hotwire kit, my 255lph can support 500whp. We shall see.
04-08-2014, 09:33 PM
#29
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Absolutely not. You need a boost referenced regulator. Only 75ish bucks and required if you want to make tuning possible over 4-5 psi. As far as injectors go, 60s can be had quite cheap and are good for 600ish hp depending on your fuel. I used flex injectors on my last turbo setup and made a little over 500 hp with them. I wouldn't recommend it though bc there is no room for error with them.
04-09-2014, 01:39 PM
#30
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A lot of people seem to go with the Siemen Deka 60# injectors, they are pretty cheap and would be enough for the power you want to make.
If you might go with E85 in the future or want to make more power (650+RWHP) then the 80# injectors arent much more money and would be worth it. E85 would require compatible fuel lines, pump, filter, regulator, and injectors but you can make a ton of power on it if its available in your area.
If you might go with E85 in the future or want to make more power (650+RWHP) then the 80# injectors arent much more money and would be worth it. E85 would require compatible fuel lines, pump, filter, regulator, and injectors but you can make a ton of power on it if its available in your area.
04-09-2014, 01:52 PM
#31
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A lot of people seem to go with the Siemen Deka 60# injectors, they are pretty cheap and would be enough for the power you want to make.
If you might go with E85 in the future or want to make more power (650+RWHP) then the 80# injectors arent much more money and would be worth it. E85 would require compatible fuel lines, pump, filter, regulator, and injectors but you can make a ton of power on it if its available in your area.
If you might go with E85 in the future or want to make more power (650+RWHP) then the 80# injectors arent much more money and would be worth it. E85 would require compatible fuel lines, pump, filter, regulator, and injectors but you can make a ton of power on it if its available in your area.
04-11-2014, 06:40 PM
#33
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bolt torque? quick question is arp is saying to stretch the bolts to 40ftlbs, is that to stretch the bolts then loosen and retorque to factory spec of 15 + 85? or just to 40 and call it done??
04-11-2014, 07:46 PM
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04-12-2014, 05:18 PM
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update got the bottom end done up, cleaned engine and painted the block, going to order the head studs in the next few days,once the heads are on will be getting the charger. in the mean time i have broken exhaust manifold bolts to remove.will post pics of the engine painted later on tonight.
04-17-2014, 12:36 PM
#38
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Bov's and Wastegates. what type of Bovs and Wastegates are you guys running??Just curious so i can start looking for them. not sure what size and what ones are considered good quality.thanks.