853 to ported 241 lost power?
Thread Starter
Teching In
Joined: Dec 2013
Posts: 15
Likes: 0
853 to ported 241 lost power? Car ran good before but wanted more so I changed my cam timing with a cloyes hex adjust timing chain. Moved the 112 Texas speed ms3 cam to 108. Next I installed a set of hand ported 241 heads. Finished up with new exhaust and BMR rear suspension. Everything seems fine just doesn't have the bottom end pull or the sit u in the seat acceleration. Why? Car made 387 rwhp on dyno before changing out heads and timing chain haven't dyno end it sinse changes any help will be appreciated thanks
Advancing would theoretically bring the power band down and help build more dynamic compression. So yes, I'd be surprised if he lost torque.
Of course, if the ported 241s are hogged out... then nothing is helping that.
Of course, if the ported 241s are hogged out... then nothing is helping that.
I'm trying to figure out what he wants answered. A 112 MS3 is already on a 108 icl, and he took it to 104? I'm leaning more towards the hex-a-just is a huge unreliable piece of ****.
Did you degree the cam? (Assuming no)
Who ported the heads?
Did you degree the cam? (Assuming no)
Who ported the heads?
Thread Starter
Teching In
Joined: Dec 2013
Posts: 15
Likes: 0
We did degree the cam. My buddy builds race engines for a living and I assume he knows how to degree it correctly. Car fires up quickly and runs very smooth. The ls1 had great bottom end torque even with 3.42's and a 3200 converter. It still runs good but just doesn't seem to pull like before down low in the rpm. Trying to figure out if the ported heads or the timing is the culprit for the loss of power. My engine builder told me I should have more power down low with the cam degreed at 108
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
Next I installed a set of hand ported 241 heads.
Who knows how big the runners and the chambers are, or if they are even equal across the board. With those randomly hogged out by some guy with a dremel, I'm not surprised your results are all over the place. You could've lost significant air velocity and compression (even with the earlier ICL) which would explain the loss in low end power.
I've seen a guy local with a MS3 and some hand ported 243s that only made ~340rwhp and runs like a turd at the track to back it up.
I blame the heads, fairly sure his are hogged out likely destroyed all velocity they had.
I blame the heads, fairly sure his are hogged out likely destroyed all velocity they had.
Thread Starter
Teching In
Joined: Dec 2013
Posts: 15
Likes: 0
Ok I have narrowed the problem to the ported 241 heads so if I'm pulling the motor AGAIN then should I just buy a set of 243's or 243's cnc ported like patriot performance. I would like to get to the 450 rwhp mark. I'm right under 400 rwhp now with all my mods. Is the 243's the way to go on a stock bottom ls1 with Texas speed ms3 cam?
Interesting, Im on here looking for info related to 241s and the MS3 cam. I am about to do this swap on my 00 SS and I have ported 241s and a MS3 cam that I plan to put in. Afraid I may run into similar problems. The heads have been ported but look professional. idk....
Interesting, Im on here looking for info related to 241s and the MS3 cam. I am about to do this swap on my 00 SS and I have ported 241s and a MS3 cam that I plan to put in. Afraid I may run into similar problems. The heads have been ported but look professional. idk....
