heads for lq4
Thread Starter
Teching In
Joined: Dec 2010
Posts: 19
Likes: 0
From: chi-town
heads for lq4 looking for some sound advice just in case I'm missing something.
I have a '04 LQ4 in my s10. it's cammed, tuned, headers. stock 317 heads though.
I'm looking to make more bottom end since this vehicle is a rock crawler so I was looking at either milling the 317s or buy some 243s. I can have the milling done cheaper than buying 243s so I was wondering if there's truly any issue with milling the 317s or spend more on the 243s? figure a higher compression would make a nice difference
cam specs are
230/224
LSA 112+2
.591/.581
the rig
quick vid clip
I have a '04 LQ4 in my s10. it's cammed, tuned, headers. stock 317 heads though.
I'm looking to make more bottom end since this vehicle is a rock crawler so I was looking at either milling the 317s or buy some 243s. I can have the milling done cheaper than buying 243s so I was wondering if there's truly any issue with milling the 317s or spend more on the 243s? figure a higher compression would make a nice difference
cam specs are
230/224
LSA 112+2
.591/.581
the rig
quick vid clip
Thread Starter
Teching In
Joined: Dec 2010
Posts: 19
Likes: 0
From: chi-town
seems everyone is happy with the 243s, but what if I can save money by doing work on the 317s? trying to see if its worth it or does it put me too close for clearance with the cam and such?
Another thing to think about steve is intake manifold fitment issues depending on how much you have milled off of course.
I vote a set of 243's, thats what im going to do with my nova thats getting the lq4 in it. It will be setup real similar to your engine.
I vote a set of 243's, thats what im going to do with my nova thats getting the lq4 in it. It will be setup real similar to your engine.
Thread Starter
Teching In
Joined: Dec 2010
Posts: 19
Likes: 0
From: chi-town
good call. still trying to find info on which direction to go. thanks
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
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
Registered User
Joined: Jan 2013
Posts: 16
Likes: 0
From: KC MO
I have a set of 243's milled for ls6 11.1 so i don't know what they would be on your lq4. Ported by JR Motorsports LTD heres the specs and my listing
https://post.craigslist.org/manage/3633298135/kxyz9
Head have around 6k on them. I would still clean them up and have them checked out
Ported by JR Motorsports LTD.
They were mostly cleaned up and could flow alot more with a good polish
Will come with flow chart, basic numbers are
Intake 284.2 Exhaust 180.6
They were also milled to 11.1 compression
PRC Valve Springs with Titanium Retainers
Install Height: 1.810"
Closed Spring Pressure: 144 lb. @ 1.810" Installed Height
Open Spring Pressure: 402 lb. @ .600" lift
Open Spring Pressure: 425 lb. @ .650" lift
Maximum Spring Lift: .650"
Coil Bind 1.080"
Spring Rate: 469lbs/in
Come with hardened 7.4 pushrods and stock rockers and rails. I can remember pushrod brand but they cost 170.00
Looking for 700.00 obo
I can text pics 816 721 6202
https://post.craigslist.org/manage/3633298135/kxyz9
Head have around 6k on them. I would still clean them up and have them checked out
Ported by JR Motorsports LTD.
They were mostly cleaned up and could flow alot more with a good polish
Will come with flow chart, basic numbers are
Intake 284.2 Exhaust 180.6
They were also milled to 11.1 compression
PRC Valve Springs with Titanium Retainers
Install Height: 1.810"
Closed Spring Pressure: 144 lb. @ 1.810" Installed Height
Open Spring Pressure: 402 lb. @ .600" lift
Open Spring Pressure: 425 lb. @ .650" lift
Maximum Spring Lift: .650"
Coil Bind 1.080"
Spring Rate: 469lbs/in
Come with hardened 7.4 pushrods and stock rockers and rails. I can remember pushrod brand but they cost 170.00
Looking for 700.00 obo
I can text pics 816 721 6202
Thread Starter
Teching In
Joined: Dec 2010
Posts: 19
Likes: 0
From: chi-town
sorry I missed the previous post.
really leaning towards milling the 317s since it's easier on the wallet. any reason to go away from doing this and maybe do a dfferent cam?
the dyno will tell us soon how it's running and which direction to really go.
any more input?
really leaning towards milling the 317s since it's easier on the wallet. any reason to go away from doing this and maybe do a dfferent cam?
the dyno will tell us soon how it's running and which direction to really go.
any more input?
