hay i bought the ls6 stage 1 heads, dual springs, and valve job, and the ms4, 90/90 combo. am i better on going with the 5.3 heads with this cam. i really don't feel like flycutting the pistons. i am still wating for them to be shipped out do to back order (i think they may have been shipped out by now???) so i was thinking about changing if they would be better. don't mean to post this on here but i haven't got a responce via email. and i would like to maby get some other responces from other people.

thanks
cliff

 

LS6 should clear with that cam, depending on whether or not they've been milled. 5.3's have bigger 2.04 intake valves and will probably require notchs before the LS6 as long as they are still running 2.00/1.55 valves.

 

Good luck getting ahold of TSP. I still am waiting to hear back from them on some heads too They already lost my order for every internal engine component available for a 383 I am building since they did not answer my questions, but too bad they are the only source for PRC heads. I'm hoping patience will work, but unfortunately I am looking into the other options.

 

not milling to bump up the compression will be leaving a lot on the table specially in terms of drivability. I highly suggest flycutting even though its not the easy answer.

 

I emailed Jon at TSP 2 days ago and got a quick response. He told me that the 5.3 heads would not work with the MS4

 

I've always had great customer service with them. Great people to deal with. Try giving them a call again.

 

Oh no doubt they are great people. They are very nice, and I'd love to deal with them. Too bad they don't want to deal with me. They just seem to be very busy. I'm sure losing my business won't mean anything to them with how busy they must be. Luckily, another sponsor has stepped up and secured my purchase. Matt @ SDPC does seem to want my business, so he gets it. Sorry, I don't want to turn this into a bash TSP thread. Just stating my experience and relating to the original post about them not following up with questions. Trust me, TSP was my first choice, I wanted to buy everything from them, I've heard only good things about them- service, parts, etc. Just wish I had gotten the same treatment I had read about.

 

Cliff, if you were honestly willing to flycut the pistons, you would be better off putting the bigger valves in the LS6 heads. You could then deck the heads to bring the compression up a bit. You just have to decide whether or not it is worth the extra time and money for the added power.

Chad, I'm sorry we didn't get back to you fast enough. Sometimes it takes us the next day to get through all of our emails or PM's due to the increasing number of customers we deal with on a daily basis. We always tell customers who need an answer right away to call us. There are some things that just take time for us to get back on, such as estimates and quotes. Again, we apologize and good luck with your motor.

 

Thanks Jon, no hard feelings here, and I will definately keep TSP in mind for future purchases.

 

+1.. Always very nice and professional, but they are BUSY, so you might have too hold a little or call back.. Good luck!

 

Ya with the MS4 you will have PTV clearance problems if you go with the stage 2.5 5.3 heads, unless you do some flycutting.

I ordered a cam package and oil pump and gaskets and some other stuff, and a bunch was on backorder so everything was shipped separate which kinda sucks bc i was wanting to install everything this week.

 

I have that same package, PRC stage 1 and MS4. It gained me 107 hp to the wheels. It was so worth it. I love TSP.

 

with stock ls6 heads, how much lift can you go before you have to flycut?

 

its not so much the lift its how much duration the cam have

 

How much more power over the stage 1 ls6 heads and ms4.

 

i did not mean to slam tsp they have been very good over the phone, i know how it is to be busy i am a tech a a dealership. i would suggest them to everyone. i just want to get my stuff. i pulled my motor and my boss is getting pissed that it is still at my work.

 

jon i ordered my stuff about a month ago i don't remember if i did the bigger valves or not could you poss find out for me and pm me.
thanks
the order should be under clifford feipel.

 

????????????????????????????? Im really wanting to go with this set-up but am trying to decided weather its worth fly-cuting or not???????? TSP, what do you think???

 

with a good tune will it be able to pass emissions? just obd2 plug in no sniffer!

 

Any cam can pass OBD-II inspections as long as the correct tests are disabled.