LQ4 Questions
FormerVendor
Joined: Jul 2016
Posts: 432
Likes: 7
With that particular camshaft you will have a decent amount of clearance to work with. What compression ratio are you trying to achieve? What cylinder heads are you planning to run? 317s? What pistons are you planning to run?
FormerVendor
Joined: Jul 2016
Posts: 432
Likes: 7
With the LQ9 flat top pistons, stock thickness head gaskets, and heads milled .035 you should be right at your target compression ratio. Clearance should not be a problem with the GM Hot Cam, but it is always important to measure for proper clearance before final assembly.
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Thread Starter
Teching In
Joined: Aug 2016
Posts: 12
Likes: 0
Has anyone done a similar build? I was curious on what kind of HP I could have. I'm topping it off with a Holley 750 Double Pumper and the MSD 6LS box to run ignition. I figured fuel injection would be a nightmare in the foxbody wiring.
Teching In
Joined: May 2015
Posts: 36
Likes: 0
I too am running a LQ4 with stock 317 heads for the time being, can't wait to either have these worked on or go with some aftermarket higher compression ones...my combo so far as been 11.27 @ 118 this weekend, I cannot believe the potential these engines have with a little tuning.
LQ4, MS4 cam, Holley Intake, 650 Holley Carb, Stock bottom end (so far).
LQ4, MS4 cam, Holley Intake, 650 Holley Carb, Stock bottom end (so far).
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
Super Chevy made 470 HP with a 6.0 with L92 heads, GM Hot cam, and a carb. Subtract about 30 HP to get numbers with stock 317s.
That was gross HP rating though, as measured with no water pump or accessories. It DID have cats on the exhaust though.
That was gross HP rating though, as measured with no water pump or accessories. It DID have cats on the exhaust though.
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
GM Hot cam is a baby cam though. Very good cam for a mild carb setup with that narrow LSA. I typically run a .560-.600 lift cam in the stock engines thanks to spectacular head flow and stock valve train.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 12
Likes: 0
I too am running a LQ4 with stock 317 heads for the time being, can't wait to either have these worked on or go with some aftermarket higher compression ones...my combo so far as been 11.27 @ 118 this weekend, I cannot believe the potential these engines have with a little tuning.
LQ4, MS4 cam, Holley Intake, 650 Holley Carb, Stock bottom end (so far).
LQ4, MS4 cam, Holley Intake, 650 Holley Carb, Stock bottom end (so far).
Thread Starter
Teching In
Joined: Aug 2016
Posts: 12
Likes: 0
I read that, really impressive for a stock GM head. I thought about running a Texas Speed 224 cam, but the lift is 600. Feels a little too big for not as much air flow.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 12
Likes: 0