BIGBOS

I'm still looking for opinions on a blower cam for my upcoming motor...

I didn't get much response over in the F.I. section, so I decided to post a new one over here... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

The motor is a 6.0L iron block 9:1 compression, pistons, rods, etc, bored .40" over to 372ci, I'm looking to shift the car around 6800 rpms....I think thats a good shift point, I really don't want to take it into the 7000's, I want this motor to last a long long time, the car is going to be setup to run 12psi...

The cam will be a 114lsa, but I'm not sure on what duration and lift to go with for this size of a motor and to get around 6800 for a shift point....

Any ideas?

First choice of mine so far is...

228/234 .591/.595 114lsa

<small>[ April 08, 2003, 11:07 PM: Message edited by: BIGBOS ]</small>

BIGBOS

TTT..

How would the car run w/my current cam

214/218 .540/.550 114lsa?

Cal

iTrader: (1)

Isn't 9:1 compression too high for blower use? I thought 8:1 was what most used with blowers. I personally think you would get good results with that cam; I've seen blower engines that idle very smooth and put out tons of power. You could go bigger, of course. I've seen cams of various sizes advertized as blower cams. The cam you have is supposed to be a blower cam.

bybycops

well one things for sure- u do need to get a new cam because that other one is too small.
228/234 .591/.595 114lsa
that sounds pretty good

Paul F

iTrader: (2)

I'd go with a 230/236 114-115lsa. The extra CIs you have with benifit from the added duration and the power should be right about where you are wanting to shift, but still with very good streetability.

Chicago Crew UnderBoss

iTrader: (1)

BIGBOS:

Sounds like you are going to have a KILLER motor their my friend. I say follow THUNDERRACING's advice and go for the GUSTO.

Hope that blown BEAST will be ready for the Powerhouse Performance car show on June 1. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

Best of luck.

MTI 427 C5 Roadster

ArcticFormula

I think the car would fly with your current cam. I would use that money saved towards a forged crank, or the cog setup for your blower.
Regards,

BIGBOS

What would be the major differences from using my current cam compared to using the one I listed?

ArcticFormula

I think the major differences would be less peak hp and better idle/street manners for your current cam, and less valve spring stress. Figure at the boost levels your considering (14psi?) your probably close to the equivalent of a 600 cubic inch motor. I guess ones goals become the determining factor, is 550+rwhp a necessity or is around 500+ acceptable.

Ragtop 99

iTrader: (7)

Part of the issue isn't necessarily the duration, but how much advance you add versus how radical a set-up you want. A 224/230 114 with no advance will pull very strong up top while the 230/236 115 will probably need 2 - 4 degrees of advance in order to have any bottom end power for just driving around.

If you want the motor to last a while, why not target a 6600 shift point? You won't be that much slower with the torque you'll be making.

BIGBOS

I want to make close to 600rwhp w/this setup...

can it be done w/the current cam I have?

I'm shooting for 12psi total for now....

VINCE

iTrader: (1)

Yes I think with a 372ci you can make 600rwhp with your current cam with less than 12psi.. Your car would idle like stock, but you will peak early. I am guessing below 6k rpm.. Your tq should be killer though. The bigger cam would give you more of what you want if shifting around 6800 rpm is your goal. You would also produce more peak power with the bigger cam, but power under the curve would suffer unless you add 4 degrees of advance to it. Are you looking for a street/strip type of setup or a all out racer?

BIGBOS

I'm looking for a street/strip setup...

It would be interesting to see what the car would do w/the current cam, I also have a beefy driveline that will eat up a good amount of power...TH400/12bolt/etc...

Current cam is a comp grind...
214/218 .540/.550 114lsa
not sure if there is any advance at all ground in..

If I did go w/a new cam, I would do the
228/234
230/236 .591/.595 114lsa with either 2-4 degrees of advance ground in...

I just want to get the most power I can possibly can, but keep it driving nice on the streets... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I wouldn't mind shifting around 6000-6500, honestly doesn't really matter to me, as long as I'm putting down some serious power... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I need more opinions please... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

<small>[ April 09, 2003, 11:25 PM: Message edited by: BIGBOS ]</small>

BIGBOS

TTT

VINCE

iTrader: (1)

The good thing is you could always keep the stealth cam in there and just up the boost to get the most horsepower out of your setup. I think you would see good gains with all the cam choices suggested.. If you do not want to do several cam swaps to find out what you like. I would do what Paul suggested. That cam should give you the most peak horsepower and with 4 degrees of advance you would not lose that much tq down low.. However your current cam will give you the most low to midrange power. Something you will use on the street.. With boost I really do not think you will notice the loss that much. Also, the bigger cam might help with traction more... Take in mind we are all guessing and the only way you would know is to put the combo together.. LS1's seem to have a mind of its own at times..

BIGBOS

Your right about the LS1's vince...

I'm still undecided...

So my current cam would peak probably under 6000, but would make killer TQ, how would the top end be?

If I went with the 230/236 .591/.595 114lsa with 4 degrees of advance ground it, would I have all that low end combined with all of the top end?

CHRISPY

you are running a TH400 with transbrake and fairly loose converter.

Go big on the cam and max power from 4000-7200rpm.

I like the idea of 230-236 114LSA.

I would even consider a 230/244 on 114LSA with some advance ground in to bring your peak down to around 6600rpm. With low compression you should be able to get away with that much exhaust duration. (measure to make sure)
Also your added cubes will eat up the cam a bit as well.

Cheers,
Chris

ps- With 12-15#'s boost you will be in boost as soon as you flash the converter. Low end will NOT be a problem. Try to Maximize power in your rpm range at the strip. (From 4000-7000rpm)

some of the smaller cams listed are a waste of time for your application. You will be giving up over 40-50RWHP for no reason. You are not a six speed car with stock gears.

<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ April 10, 2003, 01:24 PM: Message edited by: Chris ARE 360 ]</small>

BIGBOS

Thanks for the opinions guys...

I'm still undecied on what I really want to do....

Pro Stock John

iTrader: (34)

If you want to look at this a different way...

Is your car going to be a drag car?

Mine is. This year my car is a drag car that will rarely see street time. Maybe next year I can change a few things so I can drive the car for 20-40 miles like I have for the prior four years but that's not the goal.

To that end, I selected 7200 as the highest RPM to which I will buzz the motor. That really calls for a 5500 stall. I'm compromising and going with a 5000-5200 stall.

Now how big of a stall do you want to run?

If you shift your car at 6800 you need a 5000 stall for a drag car and a 4500 stall for a street car. That's how I see it.

If you all about ET, then get a bigazz stall. If it's about MPH and driving the car on the street then get a tighter stall.

I think the danger for you is to end up with too much camshaft. I have elected to potentially undercam my car... But I want good power from 5000 to 7200. I really want great power from 6000 on up.

My goal is 9.90 or better this year. I'd like to go much much faster but I don't want to compulsive about it, I have all year to tweak the car.

BIGBOS

The car currently has a 3500 stall in it..

would that work out ok w/the 230/236 .591/.595 114lsa w/the 4 degrees put im...