how much does milage decrease with large cam?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
how much does milage decrease with large cam? a buddy of mine has a 99 camaro M6 with a TSP 237/242 cam in it on a 112. true duel with x pipe, lid, deleted egr is about the extent of his mods i beleave. he says he is only getting around 100 miles to a tank in the city 
is this normal with a large cam?
the reason i ask is because i bought the motor from him and want to make sure its the cam thats screwing the milage and not the motor.
is this normal with a large cam? the reason i ask is because i bought the motor from him and want to make sure its the cam thats screwing the milage and not the motor.
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
any thoughts or comments will help...do yall think anything is messed up with the motor or is it most likely the cam or a shitty tune...maybe a combo. i think the cam and tune was done by hpe but the 02 sensors melted right after he got it back. i dont want to throw it in my truck only to turn around and take it out
i would definatly say get a new tune done on that sucker. i would also say that you cant really expect near stock gas mileage with a really big cam either. some people do in their 6 speed cars but that is on the highway that they do
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
i plan on swapping the cam to a tsp 224r or a custom grind 226 on xer lobes. that cam is way too big for my ecsb auto. hopefully the milage will get WAY better lol. i cant do 1-200 per tank. its bad enough at 400 per tank on a stock 5.3
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
Originally Posted by BayAreaSS
if you think 400 to th tank is "bad enough" i think you should stay away from a cam
isnt a 224/224 112 or 226/226 112 considered a baby cam for the ls1 anyways?
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
well im looking for a cam to get me into the 12's all motor on street tires. then ill have a cold fusion kit in my closet waiting for install so i figure 224/224 is the smallest i can go to make my goals.
TECH Resident
Joined: May 2006
Posts: 858
Likes: 0
From: SoCal
no those are considered good size cams, and very respectable cams. the 224 is a great cam. alot of people are running great times with that cam
Thread Starter
Joined: Jan 2005
Posts: 15,713
Likes: 7
From: Humble Texas
higher durations and lower LSA make for choppier idle.
so the general concensus is that the motors fine...even at 100k miles. the large cam and possibly bad tune is killin the milage. im thinkin about swappin up to a lq9 now if he's willing to let me.
so the general concensus is that the motors fine...even at 100k miles. the large cam and possibly bad tune is killin the milage. im thinkin about swappin up to a lq9 now if he's willing to let me.
