Re: Deep Inside Darren Tedder's 654ci, E85-Burning, 1,261HP Hemi!
"Thanks. well, I'm not running nitrous on this motor, but have used low tension on plenty of nitrous motors before. I wouldn't do it without a good evac pump though for the reason you mentioned. The rod angle is what it is, and that was the shortest compression height I could do without going to an .032 ring package, so that's as long a rod as I could fit. As for longevity, it's still picking up power. It only had 6 pulls on it when I went to the final. the last 2 times I've put it on the dyno it picked up both times on the same dyno.
On your 683 and 695 what changes did you have to make to deck height, or spacing to get away with it. This one is on factory deck and bore spacing."
Understood on the low tension rings. My pro mod experience (and virtually anyone I know) never had very good luck with them using heavy nitrous (3-4 big stages). I've had wet chambers with them even while pulling 18 inches vac downtrack. Hope they work out for you long term. But with the E-85 you're playing a different ballgame and it may not be an issue at all. I hope it isn't for your sake.
Regarding deck ht., I ran 11.225" & 11.800" (with aluminum spacer plates on the block). The 11.800 ht. was likely overkill once the pistons were finally light enough, but it did allow me to get a 7.800"+ rod in it - which again probably isn't needed if the piston is light enough. I initially had a lot of skirt wear (specifically piston rock at the bottom of the stroke) and the longer the rod, the better they lived. Borespace was that little 4.800". As you well know by now, building a big '26 is kind of like trying to put 5 quarts into a gallon container. It gets real tight in there. I can certainly appreciate what you've done and really like it.
"Thanks. well, I'm not running nitrous on this motor, but have used low tension on plenty of nitrous motors before. I wouldn't do it without a good evac pump though for the reason you mentioned. The rod angle is what it is, and that was the shortest compression height I could do without going to an .032 ring package, so that's as long a rod as I could fit. As for longevity, it's still picking up power. It only had 6 pulls on it when I went to the final. the last 2 times I've put it on the dyno it picked up both times on the same dyno.
On your 683 and 695 what changes did you have to make to deck height, or spacing to get away with it. This one is on factory deck and bore spacing."
Understood on the low tension rings. My pro mod experience (and virtually anyone I know) never had very good luck with them using heavy nitrous (3-4 big stages). I've had wet chambers with them even while pulling 18 inches vac downtrack. Hope they work out for you long term. But with the E-85 you're playing a different ballgame and it may not be an issue at all. I hope it isn't for your sake.
Regarding deck ht., I ran 11.225" & 11.800" (with aluminum spacer plates on the block). The 11.800 ht. was likely overkill once the pistons were finally light enough, but it did allow me to get a 7.800"+ rod in it - which again probably isn't needed if the piston is light enough. I initially had a lot of skirt wear (specifically piston rock at the bottom of the stroke) and the longer the rod, the better they lived. Borespace was that little 4.800". As you well know by now, building a big '26 is kind of like trying to put 5 quarts into a gallon container. It gets real tight in there. I can certainly appreciate what you've done and really like it.
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