Needa hook-UP on CMI 496 Sport Tuned Headers

[SoCalSouthpaw]

Can anyone helpa bum out? I'll buy you Fat Burger at Topock this season.
THANKS!!!!!

[Panic Button]

Fred at Trickmarine.net is the man...

[Kahuna]

Has anyone else heard that there is a problem fitting on some of the newer engines? I believe that the hearders are ment to fit early 496 and the newer enginines have issues with brackets fitting back after the install of the CMI headers.

[FRENCHIE]

i just got mine done on both motors...close to $10,000 including install! i ordered them through cmi direct. have realistically seen about 3-4mph increase over previous...while i expected about 5-7 pmh more, base on their review of 3.1 mph gain in SPEED BOAT MAG!!! (for a single motor that is) however the mid range cruising speed to nailing the throttle is noticabley much more responsive, and torque filled!! mine also ran a little more $$ as i had to have custom 'S' exit pipes made to go under the transom as the original straight pipes would hit and were not low enough!!! good luck.
try http://www.custommarine.com/customers.php
or http://www.trickmarine.net/prodlist.cfm?categoryid=22&showmenu=

[moneypit]

i just got mine done on both motors...close to $10,000 including install! i ordered them through cmi direct. have realistically seen about 3-4mph increase over previous...while i expected about 5-7 pmh more, base on their review of 3.1 mph gain in SPEED BOAT MAG!!! (for a single motor that is) however the mid range cruising speed to nailing the throttle is noticabley much more responsive, and torque filled!! mine also ran a little more $$ as i had to have custom 'S' exit pipes made to go under the transom as the original straight pipes would hit and were not low enough!!! good luck.
try http://www.custommarine.com/customers.php
or http://www.trickmarine.net/prodlist.cfm?categoryid=22&showmenu=
10 grand for 3-4 mph? Wow.... How about a labbed prop, dont put so much fuel in the boat. Wax the hell out of the boat?

[SoCalSouthpaw]

Anything's gotta be an improvement over these P.O.S's. Any comments on the torque getting outta of the hole/ on plane? I've had issue's last season w/ a full boat load.
http://***boat.com/forums/attachment.php?attachmentid=12915&stc=1

[Beer-30]

Anything's gotta be an improvement over these P.O.S's. Any comments on the torque getting outta of the hole/ on plane? I've had issue's last season w/ a full boat load.
You don't like your Lightnings? I would kill for 8.1L pair.

[SnakeWrench]

The CMI's are a pain in the waazoo to install. They were designed for early model 496's and do not fit 2003 or newer 496's. Other than that, I have been installing Lightnings for 11 years and have never had a problem with them.

[SoCalSouthpaw]

I'm pretty sure my block is older than '03. Can anyone tell by the pic above?

[Kilrtoy]

Save your money...
I was just talking to a guy in the channel about this and he spend 3500 and said he gain 1.2 MPH on gps......
He was pissed

[djunkie]

Anything's gotta be an improvement over these P.O.S's. Any comments on the torque getting outta of the hole/ on plane? I've had issue's last season w/ a full boat load.
http://***boat.com/forums/attachment.php?attachmentid=12915&stc=1
Thats doesn't look like the 496 that everyone else is talking about. That looks like a normal older chevy motor.

[frdvschvy]

Anything's gotta be an improvement over these P.O.S's. Any comments on the torque getting outta of the hole/ on plane? I've had issue's last season w/ a full boat load.
You can throw them away at my house. I swear I will make sure the trash man takes them away on trash day :)

[victorfb]

You can throw them away at my house. I swear I will make sure the trash man takes them away on trash day :)
i wanna be your trash man if thats the stuff you throw away.

[victorfb]

Anything's gotta be an improvement over these P.O.S's. Any comments on the torque getting outta of the hole/ on plane? I've had issue's last season w/ a full boat load.
http://***boat.com/forums/attachment.php?attachmentid=12915&stc=1
hard to tell your drive and no way to tell your set up. but i seriously doubt those headers are the cause of your problem.

[Midlife Advantage]

i just got mine done on both motors...close to $10,000 including install! i ordered them through cmi direct. have realistically seen about 3-4mph increase over previous...while i expected about 5-7 pmh more, base on their review of 3.1 mph gain in SPEED BOAT MAG!!! (for a single motor that is) however the mid range cruising speed to nailing the throttle is noticabley much more responsive, and torque filled!! mine also ran a little more $$ as i had to have custom 'S' exit pipes made to go under the transom as the original straight pipes would hit and were not low enough!!! good luck.
try http://www.custommarine.com/customers.php
or http://www.trickmarine.net/prodlist.cfm?categoryid=22&showmenu=
so you're saying the less than expected top end is due to the weight ratio of two engines to the added horsepower bein a lower number, but the torque is there? sad but logical. Ya think my single would see that 5-7MPH?

[Beer-30]

so you're saying the less than expected top end is due to the weight ratio of two engines to the added horsepower bein a lower number, but the torque is there? sad but logical. Ya think my single would see that 5-7MPH?
That's alot to ask with no other mods.
I have always cut the gains that are advertised - in half. If K&N says you will see 10 HP in any given application, I feel lucky to see 5.
If MSD says 10 HP, for a box and ignition, I feel lucky to see 5.
So on and so forth. If you expect to see half, you don't set yourself up for a fall.