Recomendations for new heads

**Dr.Crash** · 05-28-2009, 11:13 AM

I have been thinking about this for a while now, but now more than ever with the stroker i really want to get some new heads. i have been looking at the AFR 225's but i am not sure if there is anything else out there that might be better for my set-up. i am open to any suggestions, and price isnt really an issue because if i have to i will save up. Thanks

**c5z28** · 05-28-2009, 11:22 AM

Damn a guy was selling some dart 225's for like 1100 bucks-he just sold them to.
You could go witht he l-92 heads, but then that means you would have to trade that manifold out.

Do you know the cfm's on your heads?

**Dr.Crash** · 05-28-2009, 12:02 PM

off their web site

Our custom 5 axis CNC machined new GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 65 cfm improvement over stock OEM versions. The 59cc chambers (achieved by milling), will increase the compression on a stock LS1 from 10-1 to 11-1. Based on other modifications, gains of up to 40 rwhp can be expected. These are a great choice for naturally aspirated engines. The Stage II heads feature 21-4N 2.02”/1.57” stainless steel valves, our Original Patriot Gold Dual .650” Lift springs, titanium retainers, Super 7 machined locks, custom honed bronze guides, machined spring bases, and viton rubber seals.

*Sold as Pair

Technical Specs:

Combustion Chamber: 59cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle

**c5z28** · 05-28-2009, 12:43 PM

Originally Posted by Dr.Crash

off their web site

Our custom 5 axis CNC machined new GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 65 cfm improvement over stock OEM versions. The 59cc chambers (achieved by milling), will increase the compression on a stock LS1 from 10-1 to 11-1. Based on other modifications, gains of up to 40 rwhp can be expected. These are a great choice for naturally aspirated engines. The Stage II heads feature 21-4N 2.02”/1.57” stainless steel valves, our Original Patriot Gold Dual .650” Lift springs, titanium retainers, Super 7 machined locks, custom honed bronze guides, machined spring bases, and viton rubber seals.

*Sold as Pair

Technical Specs:

Combustion Chamber: 59cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle

Are these your current stage 2's?
You know you should see how the dyno #'s pan out, but if you want power look into some worked l-92's.

**Dr.Crash** · 05-28-2009, 01:28 PM

Originally Posted by c5z28

Are these your current stage 2's?
You know you should see how the dyno #'s pan out, but if you want power look into some worked l-92's.

ya but then i have to get rid of the FAST. IDK if i want to do that.

**c5z28** · 05-28-2009, 01:29 PM

Hey the whole point is you wanted more flow

you going to the abel carshow or what?

**Dr.Crash** · 05-28-2009, 01:32 PM

I dont know if she is ready for that...... looks like crap

**c5z28** · 05-28-2009, 01:35 PM

Originally Posted by Dr.Crash

I dont know if she is ready for that...... looks like crap

Your car looked great last time I saw it-what the hell did you do

?

**Dr.Crash** · 05-28-2009, 01:39 PM

That wasnt "car show good"

**c5z28** · 05-28-2009, 02:36 PM

100+ cars mostly vettes and free bbq

**Dr.Crash** · 05-28-2009, 02:38 PM

maybe this insted of new heads. much cheaper

http://www.ls1.com/forums/showthread...17#post1942417

**c5z28** · 05-28-2009, 02:57 PM

And alot less work, you will definatley have to get a tune for that. One of the corvette boys didn't disengage the clutch after a race and a backfire blew his maf apart-in your case that would blow the manifold to being it is thinner. Look into how much the kit for the direct port cost new.

**c5z28** · 05-28-2009, 02:58 PM

We need frost to come in here

**Dr.Crash** · 05-28-2009, 03:03 PM

Originally Posted by c5z28

And alot less work, you will definatley have to get a tune for that. One of the corvette boys didn't disengage the clutch after a race and a backfire blew his maf apart-in your case that would blow the manifold to being it is thinner. Look into how much the kit for the direct port cost new.

on ebay is $1045 shipped. intake wouldnt blow. i will just get some of those burst panels. i think N20 is the way to go. so much easier. Im sure Frost will help me out with the Tune again