Alright...it's time I get to the bottom of this! I had my motor built by Nick Micale and he told me he installed (and hot wired) a DW300 or 301 (apparently they're the same) fuel pump at the time. But I'm having a very consistent issue with not being able to run above about 14 psi boost.
What happens perfectly *very consistently*, is right about 14 psi boost, it cuts out. Running E85, and initially only having 60 lb injectors, I thought that might be it. So I upgrade to 80 lb injectors, and a new TurboTweek chip to match, designed for up to 25 psi. No change at all...still basically a near totally loss of power at 14 psi. It really feels like it's not getting enough fuel.
I know, I should probably have a scantool, but I do not. If I have a run where I stay below 14 psi, it feels *perfect*, and generates great, smooth power, and the Scanmaster reads around 800-820 O2 MVs. However, if I stayed in it once or twice briefly for a couple seconds through the power loss, and the MVs were dangerously low. As I remember I saw a high 600 and a low 700 once. So now, not only there's no reason to, I let off the moment it happens.
So...in talking with Nick, he thought maybe it was an insufficient ground to the fuel pump. I added a 10-guage ground to the stock ground and it had no effect at all.
At this point, while I can see that the fuel tank straps appear to be in a different location than originally, suggesting the tank was dropped, I'm thinking that he made a mistake and didn't put in a DW300/301 FP.
But that's why I'm writing this thread. Because I'd like some feedback on other possibilities - before I buy another DW301 FP and drop the tank, assuming I need to install one. There's a hell of a lot more power in this motor asking to be unleashed with another 5-6 psi. Well, of course I know I could go higher than that with E85, but at this point, I plan on keeping the car for years, and don't want to stress the motor that much. I'm sure I'll be happy with 21 psi for a while.
So...any suggestions? Again - it runs perfect up until 14 psi, and then - it's flat on its butt. I took it to an 1/8th mile track and raced my buddy last Fall in his stock 2015 Camaro SS (426 hp), and had him by 1-2 car lengths all 4 times we raced. I had it set for ~15 psi, and when it cut out and went flat, I'd back off to ~90% throttle, and the car would take off again.
Last thought: I believe Nick installed a new stock style fuel filter too. Are those okay flow-wise for E85?
What happens perfectly *very consistently*, is right about 14 psi boost, it cuts out. Running E85, and initially only having 60 lb injectors, I thought that might be it. So I upgrade to 80 lb injectors, and a new TurboTweek chip to match, designed for up to 25 psi. No change at all...still basically a near totally loss of power at 14 psi. It really feels like it's not getting enough fuel.
I know, I should probably have a scantool, but I do not. If I have a run where I stay below 14 psi, it feels *perfect*, and generates great, smooth power, and the Scanmaster reads around 800-820 O2 MVs. However, if I stayed in it once or twice briefly for a couple seconds through the power loss, and the MVs were dangerously low. As I remember I saw a high 600 and a low 700 once. So now, not only there's no reason to, I let off the moment it happens.
So...in talking with Nick, he thought maybe it was an insufficient ground to the fuel pump. I added a 10-guage ground to the stock ground and it had no effect at all.
At this point, while I can see that the fuel tank straps appear to be in a different location than originally, suggesting the tank was dropped, I'm thinking that he made a mistake and didn't put in a DW300/301 FP.
But that's why I'm writing this thread. Because I'd like some feedback on other possibilities - before I buy another DW301 FP and drop the tank, assuming I need to install one. There's a hell of a lot more power in this motor asking to be unleashed with another 5-6 psi. Well, of course I know I could go higher than that with E85, but at this point, I plan on keeping the car for years, and don't want to stress the motor that much. I'm sure I'll be happy with 21 psi for a while.
So...any suggestions? Again - it runs perfect up until 14 psi, and then - it's flat on its butt. I took it to an 1/8th mile track and raced my buddy last Fall in his stock 2015 Camaro SS (426 hp), and had him by 1-2 car lengths all 4 times we raced. I had it set for ~15 psi, and when it cut out and went flat, I'd back off to ~90% throttle, and the car would take off again.
Last thought: I believe Nick installed a new stock style fuel filter too. Are those okay flow-wise for E85?