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MS3 cam question

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Old 02-06-2008, 09:05 PM   #1
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Default MS3 cam question

Just got an MS3.
Before I ordered I talked to Jon at Texasspeed who told me "The MS3 is the biggest cam that we offer that you can use with your heads without having to flycut."

However, I called in to double check today before I put it in, and the other Jon informed me that this cam will not fit with the PRC 5.3L 220cc 2.5 heads without a valve job.
I think when you order the heads you have to specify if your going to be running the MS3 and they will go ahead and perform the valve job before sending the heads out, however I never specified because I ordered the Torquer II originally and recently decided to upgrade.

What Im wondering is has anyone run the MS3 with these heads without flycutting or doing the valve job?
How much clearance did you have?


I donot want to have to pull my heads off again, Ill prob just end up selling the MS3 if it comes down to that.


Suggestions?
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Old 02-06-2008, 09:10 PM   #2
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You missunderstood. Trust me, I have the MS3 and I have PRC Stage 2.5 5.3L Heads with a "5 angle vavle job (porting not fly cutting)", and I DID NOT need to fly cut.

Plus, TSP does sell a bigger cam that also does not require a FLY Cut.... the MS4
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Old 02-06-2008, 09:13 PM   #3
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Quote:
Originally Posted by 1BDTRAM View Post
You missunderstood. Trust me, I have the MS3 and I have PRC Stage 2.5 5.3L Heads with a "5 angle vavle job (porting not fly cutting)", and I DID NOT need to fly cut.

Plus, TSP does sell a bigger cam that also does not require a FLY Cut.... the MS4




I have the PRC 5.3L 2.5 220cc heads... Untouched.. No milling nothing.. Just straight from TSP.. Are you SURE this MS3 will fit without any clearance issues?
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Old 02-06-2008, 09:15 PM   #4
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Yes, 1,000,000% sure.
Call 806-866-0734 (TSP) and talk to Trevor, the owner. He WILL say the same thing.
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Old 02-06-2008, 09:16 PM   #5
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Quote:
Originally Posted by 1BDTRAM View Post
Yes, 1,000,000% sure.
Call 806-866-0734 (TSP) and talk to Trevor, the owner. He WILL say the same thing.
I dont know why Jon told me it wouldnt work then.
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Old 02-06-2008, 09:17 PM   #6
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dont worry about it, it will work, maybe he got mixed up
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Old 02-06-2008, 09:26 PM   #7
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Quote:
Originally Posted by Joey7489 View Post
I dont know why Jon told me it wouldnt work then.
There was a miscommunication. Those heads wil not work with the MS4 camshaft. The lift on the MS4 is just too high to clear.

Your MS3 will work with those heads.
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Old 02-06-2008, 09:26 PM   #8
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Quote:
Originally Posted by Joey7489 View Post
I dont know why Jon told me it wouldnt work then.
Hate to say it, but TSP has (2) Johns that work the phones there, 1 john knows what hes talking about, the other kinda doesn't know what he's talking about.
But if you talk to Matt, you're #&@(^!

Trevor is the man, he knows his ****, and will give you a recipe for success!
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Old 02-06-2008, 09:28 PM   #9
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Quote:
Originally Posted by The Dragon View Post
There was a miscommunication. Those heads wil not work with the MS4 camshaft. The lift on the MS4 is just too high to clear.

Your MS3 will work with those heads.
I'm pretty sure the Ls1 heads will lift up to .650 or is it .600???
the MS4 lifts to .649

I know for 1,000,000% sure they'll work with LS6 heads.
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Old 02-06-2008, 09:28 PM   #10
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hmmmm... This makes me feel alot better. ******* yesssss i can put the ms3 in after all



Has anybody heard of what I am talking about tho? Getting TSP to install shorter valves for the valves to clear the piston?
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Old 02-06-2008, 09:36 PM   #11
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Don't worry about it, I'll Pm you tomorrow and let you know what Trevor said, but I would suggest calling him yourself tomorrow, waiting for 20mins on hold to talk to trevor, and tell him the deal...
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Old 02-06-2008, 09:44 PM   #12
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Quote:
Originally Posted by Eurospec2 View Post
If ordered together they set up the heads so no flycutting is required, i run this combo and i did not flycutt, works great

Quote:
Originally Posted by Jason 98 TA View Post
We offer a PRC stage 2.5 5.3l head specifically configured for the MS3 camshaft.

One of my employees has a 475+rwhp daily driver setup just like that! Just make sure you order the combo specifically for the MS3 camshaft & you should be fine!


Hmm.....
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Old 02-06-2008, 09:57 PM   #13
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Call tomorrow, we'll figure it out.
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Old 02-06-2008, 10:00 PM   #14
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Quote:
Originally Posted by Joey7489 View Post
hmmmm... This makes me feel alot better. ******* yesssss i can put the ms3 in after all



Has anybody heard of what I am talking about tho? Getting TSP to install shorter valves for the valves to clear the piston?

they dont install shorter valves. they must machine the head down where the valve seals so it is sunk into the head more. Iv read about this in other threads. you actually may have to have that done. id call tsp and double check one more time.
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Old 02-07-2008, 04:31 AM   #15
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I have those heads with a tr224/112. I wanted to go ms3,but was told I had to send the heads back to sink the valves. Had I ordered the heads with the ms3 it would have been done that way,but since i did not i had to remove and send back. I now have a custom by pat G and it measures 232/238 and it will fit so I'm going to install it
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Old 02-07-2008, 10:10 AM   #16
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I know the MS4 works with stock heads
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Old 02-07-2008, 10:40 AM   #17
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Alright guys, let me help you guys figure out what's going on here. You CAN purchase this setup (MS3/PRC 2.5 5.3L heads)and make it work without issue. However, if you want to run the MS3 cam, you MUST specify that you are running that cam when you order the heads. If you don't, then the valvejob isn't setup for the MS3 cam and there will NOT be sufficient PTV clearance. In this case, I don't think the proper valvejob has been done to allow the customer to run the MS3 cam without flycutting or sending the heads back to have the valvejob cut.

On a side note, every salesman here is very knowledgeable in these cars/engines and if there is one of us doesn't know the answer there is someone here who does 99% of the time. Matt, I think there was a misunderstanding between your and our salesman Matt yesterday. He was told there wasn't a torque arm for the M9 so that's what he told you. I just remembered you could run the TA and TA relocation with the True Dual Exhaust. Feel free to give us a call and talk to any of the sales guys. I'm 100% sure any of us can get you the help you need.

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Old 02-07-2008, 12:31 PM   #18
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Do you lose flow when you recess the valves to clear a cam??? Can anybody from TSP answer??? Very curious....
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Old 02-07-2008, 01:46 PM   #19
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Soo is any one running the MS3 with the 5.3 heads without the valve job?
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Old 02-07-2008, 05:09 PM   #20
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I talked to TSP today about this. Aparently I was right... The MS3 will work with 5.3 Stg2.5s with out a valve cut deeper. And no Fly cutting is involved. However, like in this situation, when you order the Torquer V2 with the PRCs, they did not cut the Head to the valve clearance they see fit. TSP DOES NOT RECOMMEND you run the MS3 with the PRC stg 2.5 5.3 heads UNLESS you have the "Valve Job". But they will still clear.

Did you talk to Trevor @TSP today? What he say?
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