jimmypop13

iTrader: (17)

In this thread TSP states that they are 63cc:
https://ls1tech.com/forums/dynamometer-results-comparisons/604283-all-new-prc-stage-2-5-5-3l-head-results.html

but when I called them today, they told me they are 62cc, I'm confused now!

cbrtrx

iTrader: (2)

i have those heads and i know the chamber is cnced bigger then stock, i was told they come in at almost 65ccs when not milled, i believe a stock 5.3 head chamber is around 62cc

jimmypop13

iTrader: (17)

I sent Jason @ texas speed a pm, maybe he can respond in here to help me out
-Chris

oange ss

iTrader: (50)

i bought the original 5.3's 2 years ago and they were advertised at 62cc, after ordering and talking to Jason, he said they were 63cc....

PREDATOR-Z

Mine measured at 63.x cc

BOWTIE

If I remember correctly, I thought Jason told me they were around 62cc's. Of course that is with the standard .015 mil that they do on most of them. I believe the 243's were around 63.5 or so. So the 5.3's were only about 1.5 cc smaller than the stg 1 243's as stocked by TSP. Of course you can get them milled to whatever you want.

erikthegoalie

iTrader: (29)

here is a PM I had saved, I asked Jason the same ?

Re: Jason, how are you?

--------------------------------------------------------------------------------

5.3l heads are 62.5cc chambers

Jason
Quote:
Originally Posted by erikthegoalie
cool man...thank you

what is the size now of my chambers?? just so I know

Erik

jimmypop13

iTrader: (17)

i'm just trying to find out because if they are 63cc, I'd like to mill them to 61cc but if they are 62cc, it's probalby not worth it for the money

jimmypop13

iTrader: (17)

thanks!

erikthegoalie

iTrader: (29)

anytime, anytime

PREDATOR-Z

My advice: Do not ask, just get a burette and measure. Or take them to a shop and have them measured.

jimmypop13

iTrader: (17)

yeah I think I will do that. I'm gonna call Conley's today to see if they mill heads or if they know a good place since they will be doing the install

oange ss

iTrader: (50)

IMHO, you shouldnt have to question the specs of a companies product or have them checked yourself.....

Jason 98 TA

iTrader: (4)

The last few sets I checked were 62.5cc That being said they can typically vary about .5cc depending on several different things. I will be more than happy to mill them for you at no extra charge when you order the cylinder heads Just tell the guys what cc you want & I'll make it happen

jimmypop13

iTrader: (17)

whoa, sweet! I'm going with the 2.02 intake valve. now i just gotta decide what size exhaust valve i want.

PREDATOR-Z

1.570

jegten

iTrader: (22)

that's customer service!

Jason-i will be calling you soon to talk about my options of cylinder heads!

thanks!

BOWTIE

Yes it is, Jason is great to deal with. Now if he could just make the Caddy lifters come in.