[LSOHOLIC]

I have become a fan of Cam Motion's quality and lobe profiles. Whatever you end up doing, I would have Cam Motion grind it.

I've heard nothing but good things about them but the few times I've talked to them it seems they have tried to talk me into going backwards...imo.

Several times they have told me max rpm for a hydro cam setup is 6800-ish and 7200-ish in near perfect conditions. And their IVC that they have suggested to me seem to reflect that thought process.....and I totally disagree from personal experience.

Don't know if they just "play it safe" for general customers and would maybe push the envelope for their proven customer's ??


.

 

[speedtigger]

I don't know which representative that you talked to, but I know Kip prefers solids for race and high RPM applications. I can tell you from personal experience and from several other tests I have seen that above 6500 RPM, those solid cams made more power and carried the power better. So, his preference is for good reason in my opinion.

Lots of guys have successfully spun their hydraulics far past 7500, but that does not necessarily mean it is optimal.

 

[LSOHOLIC]

I don't know which representative that you talked to, but I know Kip prefers solids for race and high RPM applications. I can tell you from personal experience and from several other tests I have seen that above 6500 RPM, those solid cams made more power and carried the power better. So, his preference is for good reason in my opinion.

Lots of guys have successfully spun their hydraulics far past 7500, but that does not necessarily mean it is optimal.

First of all....they told me Kip does not answer the phone. And no argument from me on the solids rpming better, it's in there design to do so.

But I'm talking about hydro setups. And I'm not sure if you misunderstood what I said....I spin 7400+rpm on a "quicker" hydro lobe and I would never consider going backwards.

And I guess we will agree to disagree on your last rpm statement.....because rpm will always win. The only down side to rpm is the $$ it takes to make it work. Unless you know of another (I'm talking about making a car as quick as possible, not a DD with an internet H/C special) ?

.

 

[speedtigger]

First of all....they told me Kip does not answer the phone. And no argument from me on the solids rpming better, it's in there design to do so.

But I'm talking about hydro setups. And I'm not sure if you misunderstood what I said....I spin 7400+rpm on a "quicker" hydro lobe and I would never consider going backwards.

I am not following g what you mean when you say "go backwards". Can you elaborate?

And I guess we will agree to disagree on your last rpm statement.....because rpm will always win. The only down side to rpm is the $$ it takes to make it work. Unless you know of another (I'm talking about making a car as quick as possible, not a DD with an internet H/C special) ?

.

I am not following you here either. What are you disagreeing about?

 

[LSOHOLIC]

I am not following g what you mean when you say "go backwards". Can you elaborate?

Backwards.....as to move my peak tq to a lower rpm, thus losing hp = going backwards (if your intent is going quick down the track).

I am not following you here either. What are you disagreeing about?

Rpm is always optimal, when controlled.

..

 

[speedtigger]

To clarify, I was saying that spinning hydraulic cams high RPMs is not optimal compared to a solid roller.

 

[LSOHOLIC]

Not sure if you saw it....I responded inside your quote on my previous post.


.

 

[helicoil]

So I had a 408 built for forced induction but ended up putting it in my 66 nova street car, right now the cam is a 234/234 @50 .576lift .576lift with a 114+2 lsa, comp xe lobes I believe. I'm switching pistons to bump the comp from 9 to 1 to 10.5 to 1 and it has 317 heads with a super victor and 750 holley.

I'd like to stay with xe lobes I believe and like the rpm range I have now. I was thinking about a 236/246 .578/.595 110lsa to better suit the single plain carb engine and optimize the NA combo while keeping the rpm range close to the same.

What do you cam guru's think? Any other opinions?

Keep in mind this is a street/strip car with 3500 stall at most, does have 4.11s in it also.

Sounds like a fun project, post some pics.

I got one going together too for 2015 with LS power. Did a Gen 1 383 this past summer for it and had great results. Cam was 237/243 @ .050" with AFR 210 heads and it made 543HP @ 6400. Car went 10.91/122 in the 1/4. bear in mind this a full street car, tight converter, 3.73 gear, tail pipes, etc., etc.

Doing a 418" LS3 based engine right now with an AI 317 CNC head (243 chamber mod) and a 253/265 hydraulic roller on a 112lsa with a 108icl, .650" lift on both sides. Super Victor, 950 Ultra HP, GMMP distributor set up. Will engine dyno as well, looking for 640HP and 10.30's NA @ 3200#, same drivetrain.

I think you need a cam set up like Lil John recommended to feed it. You have the converter and gear. Push the compression closer to 11.75:1 too.

Here is my street car.

 

[Widow_Maker]

With a 3500 stall and such low compression for a NA motor you can easily over cam this motor quickly.

Big dyno numbers from big camshafts are fun to look at, but performance matters most.

243/251 110+3 is the absolute biggest I'd go with the stall you currently have and compression. It will not make as high a dyno number, but it will be faster with the parts you have currently.

Fwiw Cam Motion also offers 5160 cores as well which are cheaper. For the Comp guys, they offer one cylinder cam doctor reports for 25 dollars.

 

[bcc66duece]

With a 3500 stall and such low compression for a NA motor you can easily over cam this motor quickly.

Big dyno numbers from big camshafts are fun to look at, but performance matters most.

243/251 110+3 is the absolute biggest I'd go with the stall you currently have and compression. It will not make as high a dyno number, but it will be faster with the parts you have currently.

Fwiw Cam Motion also offers 5160 cores as well which are cheaper. For the Comp guys, they offer one cylinder cam doctor reports for 25 dollars.

That's another thing I was wondering about, I can get a 13.8cc dish and get to 10.5 to 1 or a 10cc dish and get to 11 to 1. I'd like to go with the 10cc dish but I want to be absolutely sure it will run on 9e even in the 90 degree summertime.

Definitely not worried about a dyno number, it will never go on dyno. Would like to get 6.6 to 6.8 1/8th mile times out of it though. That may sound out of reach but the old 406sbc ran 7.5s at 95mph and that was before mustang II frontend, Calvert splitmonos, caltracks, and subframe connectors. The ls engine even with low compression is alot stronger and I believe it would run pretty close to 7.0s now as it sets.

The old 406 was a stock block, crank, rods with speedpro pistons 11:1 with unported sportsman II heads, holley street dominator intake and lunatic voodoo hyd. flat tappet.

Martin your actually pretty close by me so was thinking about giving you a call anyway. Do you guys use cam motion cams or comp only?

 

[speedtigger]

Raceweight?

 

[Crossbreed383]

I use Cammotion cams in my race car
Bob and myself discussed it a few times and I think it came out pretty close
Engine shows just a tick under 800 hp corrected for sea level
Not bad for a cathedral port headed pile- o- poo!!!!!!!!!!!

 

[6.0Dakota]

TFS 245's are not just any old cathedral ports. pile of poo or not. Yes they are better than stock LS3 or L92's and priced accordingly.

 

[helicoil]

I use Cammotion cams in my race car
Bob and myself discussed it a few times and I think it came out pretty close
Engine shows just a tick under 800 hp corrected for sea level
Not bad for a cathedral port headed pile- o- poo!!!!!!!!!!!

what size header on that pile-o-poo?

 

[LilJohn]

mine is a 247/262 intake.632/exh.596. 113.0 Had Brain Tooley cut this one for me.

Yea... so close... Itd be 6 of one, half a dozen of another.

Tooley knows whats up with the big inch N/A strokers.

Imo the Best n/a LS Cam guy around for these high output street driven cars.

 

[Crossbreed383]

what size header on that pile-o-poo?

1-7/8 with under 3" collector

 

[bcc66duece]

Yea... so close... Itd be 6 of one, half a dozen of another.

Tooley knows whats up with the big inch N/A strokers.

Imo the Best n/a LS Cam guy around for these high output street driven cars.

Do you think the cam you suggested would work fine with the 3500 stall? I thought it wold be a little bit aggressive at first but after looking at some dyno posts I'm not so sure.

 

[bcc66duece]

Really thinking about now getting a new convertor too so I can get more aggressive with it. Forgot to add raceweight is probably 3200 or less.

 

[Ed Curtis]

So I had a 408 built for forced induction but ended up putting it in my 66 nova street car, right now the cam is a 234/234 @50 .576lift .576lift with a 114+2 lsa, comp xe lobes I believe. I'm switching pistons to bump the comp from 9 to 1 to 10.5 to 1 and it has 317 heads with a super victor and 750 holley.

I'd like to stay with xe lobes I believe and like the rpm range I have now. I was thinking about a 236/246 .578/.595 110lsa to better suit the single plain carb engine and optimize the NA combo while keeping the rpm range close to the same.

What do you cam guru's think? Any other opinions?

Keep in mind this is a street/strip car with 3500 stall at most, does have 4.11s in it also.

Talk to this guy.

His LS powered Mustang won the naturally aspirated big block class at last year's Drag Week. Nothing speaks louder than real world results.

 

[Widow_Maker]

That's another thing I was wondering about, I can get a 13.8cc dish and get to 10.5 to 1 or a 10cc dish and get to 11 to 1. I'd like to go with the 10cc dish but I want to be absolutely sure it will run on 9e even in the 90 degree summertime.

Definitely not worried about a dyno number, it will never go on dyno. Would like to get 6.6 to 6.8 1/8th mile times out of it though. That may sound out of reach but the old 406sbc ran 7.5s at 95mph and that was before mustang II frontend, Calvert splitmonos, caltracks, and subframe connectors. The ls engine even with low compression is alot stronger and I believe it would run pretty close to 7.0s now as it sets.

The old 406 was a stock block, crank, rods with speedpro pistons 11:1 with unported sportsman II heads, holley street dominator intake and lunatic voodoo hyd. flat tappet.

Martin your actually pretty close by me so was thinking about giving you a call anyway. Do you guys use cam motion cams or comp only?

We use Cam Motion, Comp and Bullet.

Lobe design is my own when ordering from Cam Motion. I've had some exceptional results using their stuff as well.

I also feel with a single plane even with a 4" stroke motor you need a higher converter flash speed.

Do you only have 91 octane available? With 91 I like to keep engines in the 11.2-11.4:1 range. 93 can go 11.6-11.8 comfortably.