heads - stage 1 vs stage 2
Thread Starter
TECH Fanatic
Joined: Aug 2002
Posts: 1,399
Likes: 0
From: katy, tx
Re: heads - stage 1 vs stage 2 MTI heads, I know the differences between the two, I am just wondering if there is enough horsepower difference to justify me getting stage 2s instead of stage 1s.
Re: heads - stage 1 vs stage 2 Well it depends on who ports them and what Stage I & II mean. What sponsers don't want you to know is that most Stage I's will run nearly as good if not just as good as Stage II's. The flow numbers may be better on a bench with Stage II's, but once the intake is bolted on flows drops considerably so the manifold really negates much of the gain you could realize. So stick with smaller/lighter valves and shop around, price doesn't always equal performance.
FWIW, my Stage I's with stock intake valves have taken me to 10.82. Stage II results coming this spring.....
FWIW, my Stage I's with stock intake valves have taken me to 10.82. Stage II results coming this spring.....
TECH Apprentice
Joined: Aug 2002
Posts: 331
Likes: 0
From: Gambrills, MD
Re: heads - stage 1 vs stage 2 I have Absolute Stage 1x heads, w/ stock-sized swirl-polished valves, and love them. IMHO most n/a stock-displacemt street cars don't really benefit that much from larger valves. If you're trying to get down deep into the 11's, and racing every weekend, then it's a different story.
Re: heads - stage 1 vs stage 2 Check the following thread as MTI was able to get some pretty good numbers out of my Stage I heads that I bought from them. The most I've seen from a hydraulic cammed 346 with Stage II heads and all the required stuff to go with them is 440-450rwhp and 400-410rwtq.
https://ls1tech.com/ubb/cgi-bin/ulti...;f=41;t=005168
So I think Stage I's hold their own, but if your after every last bit of power, then you'll probably want the II's.
Good Luck with your buildup! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Randy
https://ls1tech.com/ubb/cgi-bin/ulti...;f=41;t=005168
So I think Stage I's hold their own, but if your after every last bit of power, then you'll probably want the II's.
Good Luck with your buildup! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Randy
Trending Topics
Thread Starter
TECH Fanatic
Joined: Aug 2002
Posts: 1,399
Likes: 0
From: katy, tx
Re: heads - stage 1 vs stage 2 Thanks,
That is what I suspected. Since my car is a daily driver like a lot of people, and the intake sucks on these cars (I'm getting a LS6 intake), and my bottom end is stock and will stay that way for a while, then I can live with the stage 1 heads. It seems they are capable of putting out some good power. Plus I can always go to stage 2 heads later and swap the stage 1s.
Dean
That is what I suspected. Since my car is a daily driver like a lot of people, and the intake sucks on these cars (I'm getting a LS6 intake), and my bottom end is stock and will stay that way for a while, then I can live with the stage 1 heads. It seems they are capable of putting out some good power. Plus I can always go to stage 2 heads later and swap the stage 1s.
Dean
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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
