227 CC intake runners

**IT_SS** · 05-26-2009, 12:10 PM

Are 227cc intake runners too big for a stock cube LS1? I'm really leaning towards patriot for my 243 heads based on cost..... and other information you guys can give me would be great. I also plan to run a ported 92mm intake manifold

**Firebirdjones** · 05-26-2009, 05:39 PM

Well it's getting up there for a little 346. Stock is 200cc which is why these LS1's are a bit soft down low in the rpm range.
But it's hard to port a 200cc intake runner and not enlarge it to some extent.

Is it too big?? Not necessarily. It's going to like rpm for sure. Depends on what you are looking for.

**IT_SS** · 05-27-2009, 10:25 AM

Originally Posted by Firebirdjones

Well it's getting up there for a little 346. Stock is 200cc which is why these LS1's are a bit soft down low in the rpm range.
But it's hard to port a 200cc intake runner and not enlarge it to some extent.

Is it too big?? Not necessarily. It's going to like rpm for sure. Depends on what you are looking for.

I'm looking for a broad power range, that's why I'm going with the CheaTR series camshaft by Thunder Racing.

The heads I want are going to have 59 CC combustion chambers which will raise compression one full point. I'm hope for 400 RWHP with stock manifolds cats. Thunder Racing offers top end kit with this cam that they claim made 394 RWHP with AFR 205s, LS6 intake manifold, and completely stock exhaust. (http://www.thunderracing.com/catalog...vid=3&pcid=289)

"LS2 CheaTR" - 215/230 .629/.592 117 LSA

**00z28bubba** · 05-27-2009, 01:03 PM

Originally Posted by IT_SS

I'm looking for a broad power range, that's why I'm going with the CheaTR series camshaft by Thunder Racing.

The heads I want are going to have 59 CC combustion chambers which will raise compression one full point. I'm hope for 400 RWHP with stock manifolds cats. Thunder Racing offers top end kit with this cam that they claim made 394 RWHP with AFR 205s, LS6 intake manifold, and completely stock exhaust. (http://www.thunderracing.com/catalog...vid=3&pcid=289)

"LS2 CheaTR" - 215/230 .629/.592 117 LSA

its hard to play the numbers game in an a4

**IT_SS** · 05-27-2009, 02:13 PM

Originally Posted by 00z28bubba

its hard to play the numbers game in an a4

I know, I'm considering an M6 conversion.....

**Firebirdjones** · 05-27-2009, 06:25 PM

Originally Posted by IT_SS

I'm looking for a broad power range, that's why I'm going with the CheaTR series camshaft by Thunder Racing.

The heads I want are going to have 59 CC combustion chambers which will raise compression one full point. I'm hope for 400 RWHP with stock manifolds cats. Thunder Racing offers top end kit with this cam that they claim made 394 RWHP with AFR 205s, LS6 intake manifold, and completely stock exhaust. (http://www.thunderracing.com/catalog...vid=3&pcid=289)

"LS2 CheaTR" - 215/230 .629/.592 117 LSA

I've looked closely at those cheater cams too. Nothing like being fast but sounding stock. Something about that just does something to me

Anyway, sounds like Thunder Racing has that package scienced out with the stock manifolds and all.
I'd even go as far as to send the manifolds out to have extrude honed, removes weight and free's up some HP too. Guys in the Factory Appearing Stock Tire classes do that stuff all the time. Keeping the stock appearance and going fast has always appealed to me.

**IT_SS** · 05-28-2009, 10:29 AM

Originally Posted by Firebirdjones

I'd even go as far as to send the manifolds out to have extrude honed, removes weight and free's up some HP too.

Where could I have this done?

**Firebirdjones** · 05-28-2009, 04:49 PM

Originally Posted by IT_SS

Where could I have this done?

There are many places but you could start with http://www.extrudehone.com/

There are places called Kennametal extrude hone, Gethoned.com, Boneheadperformance.com etc.....

It's not a cheap process but has become extremely popular. Possibly check around your area. But plenty of places to price shop.

You will probably find that the price of extrude honing cast iron manifolds will cost just as much as a nice set of tubular stainless headers. It just depends on how stealthy you really want to keep the car

**ls1camino** · 05-28-2009, 06:14 PM

My ported 5.3L Heads got ported to 220cc...

**Dr.Crash** · 05-29-2009, 11:07 AM

I have the Patriot LS6 stg 2 heads 227CC. Worked great on the stock cubed motor, with no issues. hard to beat the price as well. Just remember that the AFR's are said to flow better than the patriots. you might not get what you are looking for

oh and i made 397WRHP with these heads and a 230/230 cam