2V head cc's

[TCSTEVE]

Hey guys need to know the standard cc's on a 2V head?
I ordered some ACL pistons #CMKRY9460 026?? which are 20 thou over flat tops and the machinst said it will give me a 11.1 comp ratio. The guy from the engine store didnt tell me this after i told him repeatively that it was going to be 2V with stock 250 rods.
Going to have to change the cam as i got a mild hyd crow cam with only .450 lift no good for anything over 9.5 comp. Its got oversized exhaust valves and good springs so im going to open it up a lot more, bugger it. Thanks Steve

 

[xctasy]

It varies a little, but 59 is the blueprint figure.

 

[Anonymous]

Steve Ive got a 210.5 /222.5 at 50 cam in mine with 9.0 comp and if i had it to do again id be very wary (I would not) go over 9:0 comp with a 2V with this cam or less cam on standard unleaded.
Tim

 

[TCSTEVE]

Cheers guys. I thought it was bout 52 but every cc helps at the moment.
So as these things go im now getting the head flowed the block decked a little (it needs it) and im either going to deck the pistons and look for a 9 or 9.5 comp as im running PULP.
OR leave it and run water injection
get the best valve clearance i can and go for a little more lift as ive got crow single springs. And go for a larger lift/duration cam with a LSA of 112 or 110 so its not to lumpy for the street. The cars a Manual with 2.92 rear end.
My old cams a Crow 214/224 @ 50" .450 lift 112 LSA hydro dual pattern-- obviously.
Can i get a zero deck height on the pistons and take out the bowls a little to bring the comp down a little? will the valves clear : . I havent talked to my machinest for a week so im not sure if the valves will clear or not. I read a post that exhaust is the one to watch out for and my exhausts are larger.
The head is already set for ULP so i was thinking of running brass nozzles straight into the manifold and going from there.
Cheers Steve

 

[Anonymous]

Steve
I have a brand new cam from Wade it is new and unused. It is a 225.5/232.5 114lsa 4.71 lift in and ex. I paid $205 you can have it for $80.00. It should work fine with 9 to 9.5 comp it is OK with a standard diff in a Cortina as it losses minimal low rpm HP and should make very good power at around 5000 rpm. .

You probably could remove about a millimeter safely all the way around (2mm overall) around the lower half of the bowls (but the less the better as there is approx between 2.5 to 3mm thickness in wall) with some small valve relief work for a 1.74 inlet valve.

Cheers Tim

 

[TCSTEVE]

$80 bucks is pretty hard to pass up.
Once i know what im doing with these pistons ill get back to you Tim, thanks.

One question i have is my problem with my Holley i brought it being told it was a 500 but think i got 350. Can i jet it out and rebuild it with 500 gear and pumps?

LIST No.s are 7448/3009
and 4412-S/1754

Thanks Steve

 

[Anonymous]

TC Steve
Problem is Steve i reckon from previous posts by xtaxi that about 175hp is about max for a 350 holley and with that cam you are considering purchasing I believe it will make considerably more power.
I recommend you go to a 500 holley. you could definitely use the 350 until you find one latter no problems. Once you set up for 350 its an easy swap. The 350 has approx 37.5mm bore and 500 has approx 42.5-43mm at base its easy to tell the difference.
Cheers Tim

 

[TCSTEVE]

Cheers for the info Tim. I wasnt ever going to put a 350 on it the heads beyond that too.
So i cant rebuild a 350 into a 500? I got told all you had to do was change the jets and laughed.
I dont know shiit about Holleys but its all good now, im picking up a rebuilt manual choke 500!
Cheers Steve