trav00ws6

i have a 99 ss m6. with long tubes and spray thats it

i ordered a ms4 cam, and bought a pair of ls6 heads with some dual springs in them for a pretty good deal.

my question is, should i port the heads and worry about the intake manifold and throttle body later? or should i leave the heads and get a ls6 intake manifold? OR ( my favorite) port the heads and then get a ls6. i just cant drop 1300 on a ported 92/92 after the heads and cam. this is a budget build for sure. unless there is no comparison between the ls6 intake and the fast intakes. what kinda power differences are they?

my goal is around 475rwhp na. its just got to be over 450. i would love to make 600 on a 100 shot though...

Y2KblueZ-28

I would leave the heads alone hand porting can result in actually lower numbers and make the heads not flow as good if done incorrecty. the port job may look good but it can really mess things up if not done right. Hend porting results in each runner being different also. Id leave them alone and get an ls6 intake it really made a difference on my car and i love it. Yes thats a good package youve thrown together you could probably get 450 rwhp with cncd heads but with stock ls-6 heads you can most likely expect 420-440 rwhp im not saying its not possible because each motor is different.

LS1-NAVY

iTrader: (1)

ya the ls6 intake will help alot for the cam

trav00ws6

i have heard of a guy here in the dfw that does very good work porting. looks like a will jsut save my money on porting and get a ported 92/92. i have heard for people getting 40 wrhp added to there head cammed cars. im sure it will help when i sspray

Jason 98 TA

iTrader: (4)

We offer cnc porting of customers castings for a very affordable price. $650 includes full cnc porting, cnc valve job, milling & reassembly! This will setup your 243 castings to the same as every set of PRC LS6 heads we ship. Your power goals really depends a lot on the mods installed on the car, but the cylinder heads cnc ported should at 40-45rwhp. We ship the PRC head all the time configured for the MS camshafts so we can mill them accordingly...

http://www.texas-speed.com/shop/item...d=649&catid=40

Give us a call if you have any questions, we've engine dyno tested that combo for GM High Tech performance, you can checkout the article on their site!!

The ported cylinder head should add more power than a ported intake combo for about half the money!

trav00ws6

wow, thats what i like to here. and its not a bad price. could you point me to that article?

Ericbigmac83

iTrader: (19)

to meet that goal you're gonna need the ported heads and ported fast. be patient and do each step right

trav00ws6

thats what i was thinking... maybe i should buy a used ls6 intake after i get the heads ported and sell the intake when im ready to buy the fast intake?

fast 90/90?
fast92/92?
ported fast 92/92?

2mm worth it?

Ericbigmac83

iTrader: (19)

Now you're thinking. Lots of people selling their 90's to get 92's. so if youre on a budget thats the way to go

trav00ws6

if every one is switching to the 92 then i guess 2 mm is worth it

Bandit28

iTrader: (28)

If it were me i would send it to TSP and ge tthe cnc $650 deal and then have them do their stock bottom end port job. What ever heads they used on that 9 second thing.

Bandit28

iTrader: (28)

If you going to spend money on an intake you just need to get a FAST 90 or 92 I would say 90 if you are a stock cube daily driver type of guy.