sweet99ss

iTrader: (41)

I'm wondering if there are any heads out there that will gain 50hp or so? My combination now is full bolt-on ls1 with a 224r cam. If I get heads I wanna go max effort and get huge gains with them. I want to gain 50hp and 5mph if possible?

99Bluz28

iTrader: (35)

If you currently have completely stock heads at stock compression, I would say YES, 50 fwhp is possible.
I would go with a full cnc heads that are milled to get the compression > 11.0:1 . I'd look at AFR 210's with a 62-58cc chambers.

garygnu

get some AFR that Tony Mamo has worked on.

redtan

iTrader: (5)

With that small cam, you might be hard pressed to find cylinder heads that will gain you that much.

Sure you can get some sick flowing heads, but if the cam does not allow all that potential to be filled then it won't work. And since your cam has lift in the high .500s, then you're going to be limited in the airflow of the head.

Not saying that it can't be done, but you will need a very specific pair of heads that flow very very well at under .600 lift.

Something like a slightly ported and milled AFR 205 will be your best bet.

dr_whigham

iTrader: (49)

Yep. AFR 210's, CLEAN AFR 205's, or some used ETP 215's.

Tainted

iTrader: (9)

AFR, Trick Flow, either one will get you where you wanna go.

JakeFusion

iTrader: (7)

AI CNC'd 243s will get you there. Two in this thread that gained 50rwhp. And one of them was from stock 243s to the ported 243s...

https://ls1tech.com/forums/dynamomet...nths-5mph.html

sweet99ss

iTrader: (41)

How much do the afr 210's go for?

wildcamaro

iTrader: (15)

Afr, mast or trickflow are king if you ask me although I'm sure you could get there with the right combo

Tainted

iTrader: (9)

AFR and Trick Flow are both very close in cost and power. They run about $2200-2500


Although I havent heard anyone suggest this yet but,

Trick Flow as-cast 220cc heads. They are $1650 and only down about 10hp from the fully cnc 215s for $700 less while still matching and bettering ported gm casting. Also, they leave room to grow in the future as they can be ported to the 225 235 or even 245 version.

Sales@Tick

iTrader: (3)

This!

Take your pick from this list of threads....
https://ls1tech.com/forums/search.php?searchid=20349775

96capricemgr

iTrader: (1)

Mast bought PI right, so Mast heads are PI offerings?

https://ls1tech.com/forums/dynamomet...-gm-5-3-a.html
That is just AIs 218cc port not their 226cc.

Most folks have a really hard time separating marketing from results.
Also consider that aftermarket heads need full roller rockers or PM guide conversion either of which is added expense on top of an expensive option..

Sales1@Texas-speed

I would recommend taking a look at our PRC 227 aftermarket casting cylinder heads. They should no doubt help you pick up the gains your looking for. Feel free to give me a call Ill be happy to answer any questions you have.

http://www.texas-speed.com/p-1163-pr...der-heads.aspx

dr_whigham

iTrader: (49)

Considering Cary now works for MAST....

papermushrooms

AFR 210's all day govenor, i picked up 100 rwhp with out of the box cnc'd 210's and a cam spec'd by Tony Mamo

96capricemgr

iTrader: (1)

Guy is asking about heads gain alone and you didn't even list a vague cam size.

papermushrooms

228/228 on a 114 lsa not much larger than his

Exidous

iTrader: (11)

Talking about the AFR 210's makes me think my PRC 5.3's are really holding me back.....

Sales1@Texas-speed

I wouldn't say the PRC heads are REALLY holding you back, but an aftermarket casting will no doubt be an upgrade. I would recommend you take a look at our aftermarket casting PRCs. Give me a call with any questions Id be happy to help you out or answer any questions you have.

sweet99ss

iTrader: (41)

Btw my heads are stock untouched 853's... I am trying to decide if I should do the turbo build or do a good set of heads with higher compression, bigger cam, and a restall to 4k?