mods for the car I was talking about

2000 NBM WS6 M6 467rwhp 417rwtq Featured in HPP April '07
6.0L|RPM6|Manley Dual Springs|Manley-Ti Retainers|Manley Seats|Hardened Pushrods|ASP Crank Pulley|FRA|K&N Filter|Whisper Lid|Fast 90/90|SLP 160°|Kooks 1 7/8"|Kooks 3" X|Moroso Spiral Flow|Eibach Pro-kit|BMR PHB|BMR RB|BMR LCA|BMR TQ Arm|Spec 3+ Clutch|B&M Ripper Shifter|GM 4.10 Gears|ROH RT 18 (x9 x10) Fikse FM5 17 (x9 x11)

 

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It's a bigger block, with a big cam, running through a 90 mm intake...

 

my point is, if a head will run great on a bigger bore, more hp engine, there's no reason why they wouldnt work good on a smaller bore lower hp engine. The heads were .050 the guy said, and that engine would push alot more air than my car, but if I had them on my car, it would leave room for mods even though intake would restrict the flow to heads.

 

Jesus Christ. Reading this thread makes my head hurt.

Those heads have gigantic combustion chambers and aren't a good starting point. You'll have to either mill them and/or weld them to lower the volume. Yes, the 853s can be ported (if done correctly) to push upwards of 290+cfm.

Listen to these guys. It's not a great idea.

 

Sure, theres PLENTY of reasons. First off, a 3.89" bore will shroud the valves more than a 4.00" bore will, COMPLETELY changing the flow characteristics of the head. Second, those heads are milled ALOT, which also affects shrouding/flow. Third...

I can't believe I'm arguing about this. Do what you want, good luck. Oh, and for later - Told you so.

 

I'll stop you right there. You have no point. You're severely misguided.

I will not post in this thread anymore, and I will no longer offer you any advice. Your mind is made up and you won't listen to reason. So, with that in mind, I'm off to install some BBC heads on my LS1 with 121cc chambers milled 3 inches because I saw an AWESOME 502 with them running badass dyno numbers.

 

so what do you guys think the LQ9 heads flow cast number 317???

 

 

Somewhere between the LS1 and LS6, but around 9.6:1 if you slap them on your motor, so you'll actually lose power over a stock LS1.