Piston Dish For My 4v Build

[mustangman9812]

I am looking at Manley Forged Pistons for my 4v build, but I dont know what cc dish to get. I am going to use my exsiting Zex Wet Nitrous Kit I have had for a while, so I know higher compression will be fine with spray.

I setup Is

Port & Polished 4v "B" Heads
Modmax Stainless Steel Valves
Comp Cams XE274BH-116 Nitrous Cams
Long-Tube Headers
Ported Cobra Intake
Accufab TB
JLT Cold Air (Fenderwell)
30lb Injectors
Zex Wet 150hp Shot


I am looking at 11cc Dish Piston which will have me around 9.18:1 compression. I would like alittle more but that is as close as I can get it looks. The only other piston they offer is a flat top which would have way to much compression with 11.17:1 so i know I dont wont that much.

So Let Me Know Please, And Also would those camshafts benefit me the best?

Thanks,
Matt

 

[LastCallRacing]

Manley Performance 2V/4V Pistons @ Last Call Racing - Pistons - Mustang Performance Parts

If you have a 4v, you should be going by the 52cc combustion chamber column.

Assuming the rest of your engine will be stock, you'll be looking at 9.18 c/rfor 11cc dished, but the stock/flathead comes to 10.69 c/r.

If you're changing out your pistons, have you thought about a slight overbore? The chart we have shows the pistons for the common .020 and .030 overbores, and those should put you at 9.27 and 9.31 compression ratios, respectively.

As for that cam, that is definitely the big boy in Comp's lineup for nitrous/supercharged 4v's. They say that you'll get some large gains when you compliment that cam with a larger throttle body, bigger injectors, MAF, and exhaust, which you've done a good job on. The only other thing they do is to push that you use their upgraded beehive springs over the stock ones, but I'm assuming you'd be doing that at the same time.

Enjoy the cam and the rough idle If you're going to be seeing more street than strip, maybe their Stage 2 XE266BH-116 cam might be a better fit for your application.

 

[mustangman9812]

10-4 Thanks Man, I am doing A 4v swap into a 2v car. I am putting the motor together now. I am using stock crank, Ace Forged Lightweight Rods, and Forged Pistons. The block I am using only has about 10,000 miles on it and it didnt need any boring done, just a quick hone for cleaning. The car is drove now maybe 2-3 months out of the year only on special occations, drag racing some, and when I get a wild hair. I think the cams should be fine for that since it will not be driven much at all. I will continue to spray this new motor, I dont have big power plans like alot of people do on here. 400-500rwhp and I will be fine.

My only other question is Who make 4v Auto L/T Headers? This might be a problem lol