Engine Builders talk.
Senior Member
Joined: Jun 2013
Posts: 4,165
Likes: 19
Hello all. I'm looking at having to replace and/or build an engine for my truck here soon. It's got some type of bad knocking until it warms up. Worse than piston slap. Been doing this for 25k miles now. In the future I'm looking at going to a lightning swap and an engine built for some decent power. I'll be hanging out over here now lol
Senior Member
Joined: Aug 2012
Posts: 277
Likes: 5
From: down south alabama
I've had piston slap/rod knock that's loud upon start but dies down when warm but still audible since 150,000 I've got 204,000 on it now and runs fine as I can tell, I'd run it till it breaks
Senior Member
Joined: Apr 2013
Posts: 849
Likes: 18
From: Minnesota
Couple questions for all you engine builders! How much mpg drop with 42lbs injectors, supercharged with stage 3 cams and 9lbs pulley? How do you adjust how much boost you make? Just the pulley on the blower? Also how much boost can I do with being safe? Engine is rebuilt with forged Manley h beam rods and Pistons. Heads are rebuilt PI. I have a Kenne bell 2.2 twinscrew supercharger kit. Also how much horse am I looking at? Again I have a Kenne bell 2.2 twinscrew supercharger, 42lbs injectors, PI rebuilt heads with stage 2 or 3 cams, performance fuel pump, electric fans, 75mm bbk throttle body, 6 or 9lbs pulley, will be dyno tuned, 5.4 bored .20 over with Manley h beam rods and Pistons
Thread Starter
Senior Member
Joined: Sep 2011
Posts: 1,733
Likes: 56
Couple questions for all you engine builders! How much mpg drop with 42lbs injectors, supercharged with stage 3 cams and 9lbs pulley? How do you adjust how much boost you make? Just the pulley on the blower? Also how much boost can I do with being safe? Engine is rebuilt with forged Manley h beam rods and Pistons. Heads are rebuilt PI. I have a Kenne bell 2.2 twinscrew supercharger kit. Also how much horse am I looking at? Again I have a Kenne bell 2.2 twinscrew supercharger, 42lbs injectors, PI rebuilt heads with stage 2 or 3 cams, performance fuel pump, electric fans, 75mm bbk throttle body, 6 or 9lbs pulley, will be dyno tuned, 5.4 bored .20 over with Manley h beam rods and Pistons
Senior Member
Joined: Feb 2013
Posts: 3,672
Likes: 433
It always depends on the tune and where your foot's at. In vacuum, even a 700hp truck can get stock mpg.
You can got from 17mpg to 3mpg in the time it takes to put your foot to the floor.
If you drive like a kid and heavy on the gas, you better sure have the wallet of an adult.
You can got from 17mpg to 3mpg in the time it takes to put your foot to the floor.
If you drive like a kid and heavy on the gas, you better sure have the wallet of an adult.
Thread Starter
Senior Member
Joined: Sep 2011
Posts: 1,733
Likes: 56
Senior Member
Joined: Apr 2013
Posts: 849
Likes: 18
From: Minnesota
It always depends on the tune and where your foot's at. In vacuum, even a 700hp truck can get stock mpg. You can got from 17mpg to 3mpg in the time it takes to put your foot to the floor. If you drive like a kid and heavy on the gas, you better sure have the wallet of an adult.