Hi,

I have to appoligize, cause 1 question is for a Mopar friend, but its a general question I think.

Mopar buddy ?, He just got his cam and springs today. And the springs read, " .474 max lift, and 6500 RPM. His cam is .514 .524 lift, Mopar buddy said his engine builder, said that it is all OK. I myself thought, uhhhh, dont sound to kosher to me. Will this work, without blowing a valve spring, or flattening the cam? He intends to use a 150 shot of Nitrous with this also.

Other friend ?, He just bought a roller kit from Ebay, and it was advertised to be .630 .630lift. PN# Lunati 50141 250-260 Dur., 108 LSA. But after calling Lunati, they said, " .710, .640".

Isn't that to much of a gap between lifts? I called Lunati myself also, and they told me identical of what they told him. But the question is, can he get a different cam that is closer to .640, .640, and still use the springs etc from the kit he just got?

Does he have to get premium rockers with this setup too. Like Gold Race, Magnum's, Crower, etc.?

I need some input, so I can send them this link, to show that it may be questionable what his engine builder is doing.

Thanks a bunch guys

What size motors are we dealing with??? :confused:

The mopar is a 360. And the other(roller) is 377, destroked 400.

Corn,
(really wish you guys would include your real names ),
If the springs are only rated for .475 lift, and they try to use a .514 cam on them, they are likely to coil bind and wipe the cam, among other things. Unless they are setting them up at a taller installed height, but that would make the pressures a lot less also. I hate to tell someone to question thier engine builder/machinist, but anyone can make a mistake...better safe than sorry.

Thanks Bill, my name is Lorin for future whatever. That is what I was thinking as well, the guy isn't really his engine builder, its a friend that raced alot in the late 60's and 70's. Because the guy dont know alot about his vehicle, he has his friend ordering everything and putting it in for him. So what ever he tells him, he id doing. because he dont know

[ 02-27-2003, 02:10 PM: Message edited by: CORNHOLIO ]

corn, i'm no mopar guy, but like bill says, if they are reccomended to that lift, exceding that is asking for problems, if not coil bind, then very short life. and for the 2nd ?, that is a huge cam for anything other than racing, imo. (maybe thats what he's doing?) he will need damn good rockers for the spring pressure required, like a pro magnum or something similar. along w/ real good valvetrain parts in general. not to say its not a good cam either,(i really like lunati in fact) but you'll need real good heads and a solid bottom end to make full use of it. i would imagine he could have the cam re-ground by lunati to what he's looking for lift wise, but i'm no expert on this. and for the springs, i would say you should talk to lunati about that, as well. for sure don't take shortcuts in this area, and be 100% sure befor proceeding with the build, imho. just my opinions, and good luck

I totally agree, thats why I am having a problem with it. The Mopar guy dont know anything, and I think is friend that is helping him, really isnt. By telling him, oh it will work.

The other guy is building this strictly for strip, forged crank, crower billets, SRP pistons, Edel.RPM heads. He wants something drop in, and is considering just running it. I told him that very few things are just drop in, especially a .700 plus lift cam. Wont he have to do some head machining, and maybe some flycutting of the pistons?

Lorin, He, He!!, I like Corn better...LOL, LOL!!

Something about the old "Beavis and Butthead" thing that makes me laugh when the cape got thrown over the shoulders!!

Why don't you sit down and ask the guy's what they really want in their motors so that they will be happy in the end...

You know a street/strip motor can be made alotta different way's and the other guy really needs to set his use!!!

Hope this helps, Cornnn, He, He!!!

Later, pdq67

Uhh, huh huh, this like really sucks more than anything that has ever sucked before......seriously , the Lunati cam sounds like a valvespring eater! I have one that is .736" and .682" and it makes its power from 7000-9000 in a 341". It is more of a NHRA Comp Eliminator cam. I think he most definitely needs to swap the cam with someone, or get a different one. That is way too much cam for a street driver if he ever wants to do that! I would look at something like an oval track roller if he wants to use a race-oriented cam on the street. I had great luck running a custom-ground Comp Cams roller in a little 304" with Turbo heads, Victor Jr., 750, and probably a true 11:1 compression ratio. CS 295-2 305-2 R4. I would go to a bit wider LSA in your motor though, like 106-108*. It had .550" on both sides, and was 262* - 272* @ .050". I ran 1.6 rockers to get it to .585". It was very easy on valvetrain stuff, and was driven a ton on the street. In a '68 Nova with a Powerglide, all steel but the hood, it ran 11 flat after driving to the track, and pulling the mufflers and alternator belt, on 10.5" tires. A good race-only cam for 377-400 stuff is the Comp Cams CS 317 DR6. It is 280* - 292* @ .050" and .660" - .630" on a 106* LSA. Nice cam, and won't eat up valvetrain parts. I have run it too in a 331", it worked great. Uhh, huh huh, this is cool.... graemlins/clonk.gif

Uhhhhh, you guys Ruuuuuuuuule. Except that PDQ guy,he suuuuuuucks.

Yea I will have to send this link to him. Thanks for the help all, except for that one guy, (Pauly shore)

He, He!!! Carry on... pdq67