How much to mill 243's with MS3?

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Dec 13, 2012 | 10:33 PM

TxFireman1972

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From: Beaumont Tx

How much to mill 243's with MS3?

Putting together a 5.3L for my 89 Mustang Coupe. I've talked to Matt@Texas Speed about a couple of cams, but I found a good deal on a low mileage MS3 cam and picked it up. Today I picked up a set of 243's to put on the motor.

I've read till my eyes crossed and haven't found a solid answer. My questions is how much can I mill the 243's if I'm running the MS3 on my stock LM7? I know the PTV will need to be checked when it goes together, but trying to see if there is anyone running this combo, or someone that give me more info. Thanks!!

Dec 14, 2012 | 03:02 PM

JakeFusion

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From: Pace, FL

If you want to keep clearance north of .060" I'd stick to about .010"-.015" max on the mill. That'd get you down to 62cc chambers which will help bump the compression a bit.

Dec 14, 2012 | 03:14 PM

TxFireman1972

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From: Beaumont Tx

Actually have decided not to run the MS3 I picked up. So I'm back on the hunt for a cam lol.

Dec 14, 2012 | 03:25 PM

JakeFusion

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From: Pace, FL

What are your goals? Budget? If you can look at the cam within the spectrum of the entire package you can get close to what you want within a budget.

Dec 14, 2012 | 03:41 PM

TxFireman1972

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From: Beaumont Tx

Car will definitely not be a daily driver. Just a "toy". It will be driven on the street some, but not a lot. Mainly weekend cruising and cruise nights. Will be at the track as much as I can.

89 Mustang Coupe
Has a Auburn Pro rear end with 4.10s
TH350 with Coan internals and reverse manual valve body
Picking up a 4K stall tonight
5.3L
Milled 243's (amount to be determined)
Victor Jr
MSD 6010
Holley 750
Aermotive SS Fuel Pump

Dec 14, 2012 | 03:43 PM

JakeFusion

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From: Pace, FL

I'd do something like a 235/243 108+4 then with that intake. You'll have to flycut the pistons, but then you can mill the heads as much as you like.

Victor requires different camshaft valve events compared to a FAST. It likes overlap and a much earlier intake closing point.