eabrillon1978
Viper Owner
I guess this doesn't really pertain to just Roe's, but that's what I am running.
Not sure if you read my other thread on the Alley about my dyno results with the 8lbs pulley or not, managed to get 699rwhp with 700 lbs of torque with 91 octane and a 50/50 mix of ****/water. I jumped to the 10lbs pulley and the stock fuel pump cannot support it. I have a dual pump setup from Roe that I'll be installing this winter and will resort back to to trying the 10 pounder again, so I'm resorting back to the 8lbs for the time being.
I've been doing some research and it's not resulting into what I've read during my dyno session. I went into there with my air fuel ratio's 11.8 through the midrange and then leaned out to 12.0 from 5000 to 6000. and car made 560.
Gave it more fuel to 10.8 in the midrange and 11.5 at the top and car made 640. Then to 10.1 and top end at 11.2 car made 699. Using a Vec 3 this is all with retarding timing from 6.5 degree's from 2,000 then bring it up to 0 degrees from 3100 to 5000 then backing it down 2 degrees after that point.
I made 720 with same 10.1 curve but brought the timing up 2.4 degrees in the mid. Had some minor detonation issues, so brought it back down to 0.
I didn't get a chance to try giving it more fuel due to the shop closing for the day. My wideband gauge matched the dyno's ratio's.
From what I've read, it says and what I've been told. Your engine makes most horsepower around 11.8's to 12.1. I am just curious as to how many of you that went to dyno tried to give it more fuel below 11's and had an increase in your results as I did. Anyone running below 10's
I'm going to head to the dyno here again in a couple weeks to experiment with bringing the timing up, I'll post again with my results.
Please chime in..
Not sure if you read my other thread on the Alley about my dyno results with the 8lbs pulley or not, managed to get 699rwhp with 700 lbs of torque with 91 octane and a 50/50 mix of ****/water. I jumped to the 10lbs pulley and the stock fuel pump cannot support it. I have a dual pump setup from Roe that I'll be installing this winter and will resort back to to trying the 10 pounder again, so I'm resorting back to the 8lbs for the time being.
I've been doing some research and it's not resulting into what I've read during my dyno session. I went into there with my air fuel ratio's 11.8 through the midrange and then leaned out to 12.0 from 5000 to 6000. and car made 560.
Gave it more fuel to 10.8 in the midrange and 11.5 at the top and car made 640. Then to 10.1 and top end at 11.2 car made 699. Using a Vec 3 this is all with retarding timing from 6.5 degree's from 2,000 then bring it up to 0 degrees from 3100 to 5000 then backing it down 2 degrees after that point.
I made 720 with same 10.1 curve but brought the timing up 2.4 degrees in the mid. Had some minor detonation issues, so brought it back down to 0.
I didn't get a chance to try giving it more fuel due to the shop closing for the day. My wideband gauge matched the dyno's ratio's.
From what I've read, it says and what I've been told. Your engine makes most horsepower around 11.8's to 12.1. I am just curious as to how many of you that went to dyno tried to give it more fuel below 11's and had an increase in your results as I did. Anyone running below 10's
I'm going to head to the dyno here again in a couple weeks to experiment with bringing the timing up, I'll post again with my results.
Please chime in..