Joey7489

iTrader: (21)

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?

COOKIE MONSTER

iTrader: (5)

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

Joey7489

iTrader: (21)

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?

COOKIE MONSTER

iTrader: (5)

Yes, 1,000,000% sure.
Call 806-866-0734 (TSP) and talk to Trevor, the owner. He WILL say the same thing.

Joey7489

iTrader: (21)

I dont know why Jon told me it wouldnt work then.

hndakilr

dont worry about it, it will work, maybe he got mixed up

The Dragon

iTrader: (6)

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.

COOKIE MONSTER

iTrader: (5)

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!

COOKIE MONSTER

iTrader: (5)

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.

Joey7489

iTrader: (21)

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?

COOKIE MONSTER

iTrader: (5)

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...

Joey7489

iTrader: (21)

Hmm.....

COOKIE MONSTER

iTrader: (5)

Call tomorrow, we'll figure it out.

Jasonscott

iTrader: (10)

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.

john563

iTrader: (17)

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

Camaro396

iTrader: (14)

I know the MS4 works with stock heads

Jon@Texas-Speed

iTrader: (18)

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.

Jon

SOMbitch

iTrader: (8)

Do you lose flow when you recess the valves to clear a cam??? Can anybody from TSP answer??? Very curious....

Joey7489

iTrader: (21)

Soo is any one running the MS3 with the 5.3 heads without the valve job?

COOKIE MONSTER

iTrader: (5)

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?