LM7 questions regarding refresh/rebuild
Going with a turbo cam. Looking at Lil John, Brian Tooley, Tick, or Advanced Induction grinds as possible choices. I don't want something with a really aggressive lobes that's hard on the parts so that plays into the decision. Also, looking for great streetability. As for as duration goes probably somewhere in the 22x/22x 60x. lift range unless unless the cam maker suggests otherwise.
Last edited by C_Rules; Oct 24, 2015 at 08:38 AM.
have no idea why they only sent to .600" but yea i'm still going with a custom piston to put me around the stock 9.5 scr range.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Why get custom pistons with such low compression? Are you stuck using **** fuel?
Higher compression, say something mild like 10.5:1, would help with spool and throttle response and torque production.
Low compression for boost is small block Ford tradition, it's absolutely unnecessary in the LSx world. Lots and lots of successful 11+:1 compression ls motors running plenty of boost.
Just make sure your squish/quench and tune are closer to perfect.
Higher compression, say something mild like 10.5:1, would help with spool and throttle response and torque production.
Low compression for boost is small block Ford tradition, it's absolutely unnecessary in the LSx world. Lots and lots of successful 11+:1 compression ls motors running plenty of boost.
Just make sure your squish/quench and tune are closer to perfect.
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
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Why get custom pistons with such low compression? Are you stuck using **** fuel?
Higher compression, say something mild like 10.5:1, would help with spool and throttle response and torque production.
Low compression for boost is small block Ford tradition, it's absolutely unnecessary in the LSx world. Lots and lots of successful 11+:1 compression ls motors running plenty of boost.
Just make sure your squish/quench and tune are closer to perfect.
Higher compression, say something mild like 10.5:1, would help with spool and throttle response and torque production.
Low compression for boost is small block Ford tradition, it's absolutely unnecessary in the LSx world. Lots and lots of successful 11+:1 compression ls motors running plenty of boost.
Just make sure your squish/quench and tune are closer to perfect.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Things seldom go as planned, very true. So you are smart for giving yourself a safety margin. Ported heads and custom pistons led me to the dangerous assumption that you were going to burn corn.
15-20psi on pump gas warrants a drop in compression, for sure. Glad to see you have your ducks in a row. Carry on, and keep us posted.
15-20psi on pump gas warrants a drop in compression, for sure. Glad to see you have your ducks in a row. Carry on, and keep us posted.
Teching In
Joined: Oct 2015
Posts: 11
Likes: 0
From: Atlanta Ga
I haven't done anything to the block yet. Since one of the cylinders had some rust probably going to bore it out to 3.80 and then get a set of aftermarket rods and boost friendly pistons. Keeping the stock crank.
You can have the machine shop check the tolerances and if all is good put some new bearings in and put it back together with the stock rotating aseembly and new rings.
You can have the machine shop check the tolerances and if all is good put some new bearings in and put it back together with the stock rotating aseembly and new rings.
Thanks for the nice head photos. Pretty revealing.
And good for you choosing great heads for a turbo motor, it matters.
Your hot side pipe sizing, layout, and exh housing will determine spool. That along with fueling and timing from pre boost through 3 psi or so.
After dialing all that in on my car, it actually spools too fast for the track conditions we normally see....😊
Have fun.
And good for you choosing great heads for a turbo motor, it matters.
Your hot side pipe sizing, layout, and exh housing will determine spool. That along with fueling and timing from pre boost through 3 psi or so.
After dialing all that in on my car, it actually spools too fast for the track conditions we normally see....😊
Have fun.