T/A KID

iTrader: (12)

Been Building on a Blower setup for about 2.5 years now and I am getting close to being finished. I have a 224/230 114LSA 4degrees advance .544 .555 lift with my Pro Mag Rockers, 918's, and Morel lifters.
I have yet to install the camshaft or any of the motor parts, and I am thinking about Swithing the cam setup.
This is what I am looking at as possible replacements
224/230 114 .605 intake .591 exhaust (XE 3192/3194 1.6 and 1.52 rockers)
224/230 114 .605 intake .598 exhaust (XE 3192/ Magnum 3111 1.6 rockers)
224/234 114 .605 intake .576 exhaust (XE 3192/ XE marine 3473 1.6 rockers)
224/236 114 .605 intake .624 exhaust (XE 3192/3196 1.6 rockers)
These cams utilize most of the High lift XE and magnum lobes, which are very aggresive for HR's and need really good valvetrain or lower rpm to be stable.

Thought that a blower car needed a split of about 8+ degrees till I seen some really fast blower cars using 222/228 camshafts, lol. And Some say Wide LSA is not needed for a blower setup, but I just want the camshaft to same tame at idle, and even with a wide LSA she'll run hard .


Comp has my Rockers and 918's right now since I sent them back to refund my 918's for some PAC 1518's (.650 lift Beehive spring that is the ****), and I am going to setup the rockers toward the cam of my choice.
A little valuable info for the car,
VRE 383 Forged shortblock, LE3 AFR 216 runner heads, LE Edelbrock LT4 intake, Monoblade, D1SC procharger maxed out with a FMIC, reving to 6200 RPM, with a 4L80E and most likely a 3.23-3.42 gear ratio in the rearend and the Car will be a daily driver.

ChevyChad

iTrader: (50)

Don't you want more lift on the exhaust side for a blower car? That pretty much narrows down your list to that last one lol

Got Me SOM

iTrader: (2)

i dont think you'll see much of a difference there going from cam to cam.

T/A KID

iTrader: (12)

I actually agree, thought about it and said to myself that its not going to make that big of a difference, lol.

Found a different exhaust lobe I like.
224/236 115LSA (should help with the overlap) with a .605 intake and .608 exhaust. The exhaust is a littler slower than the intake side which in my opinion is a good thing.

Tom@SpeedInc

iTrader: (5)

One of the highest dynoing ProCharger stock short LS1s we've had on the dyno was running 232/234 .595.598 112, making too much boost, 4.10" pulley had it nearly 14psi, 4.25" = 12 psi IIRC

685rwhp D1SC stock shortblock LS1.......... though a 4L60

overlap isn't such an evil afterall.

Websy21

iTrader: (34)

Holy **** those are some crazy numbers for a stock block

T/A KID

iTrader: (12)

what was the lift on that badboy and any advance in the cam???
I have some very respected cam friends and they told me Overlap is not a bad thing on a blower car.
Thinking about doing #2 on my list on a 112.
What do you think about that?

Tom@SpeedInc

iTrader: (5)

https://ls1tech.com/forums/forced-induction/728614-pics-dyno-gragh-my-fmic-d1-sc-set-up.html

heres another kicker, it was though a 4:30 gear and slippery 4400 converter

Backed itself up with a 10.42 ET, lou is pretty crafty with his FMIC setup.

Otherwise one of our more recent builds, WS6 w/ 370ci AFR 225 heads 9:1 compression 11psi D1SC, ATI intercoolers, made 660rwhp setup for 91 octane using our SC1 cam (224/232).

Inspector12

iTrader: (29)

My own grind is so close to this one-224/230 114 .605 intake .591 exhaust (XE 3192/3194 1.6 and 1.52 rockers) That I often wondered if comp put it on there website with just a little lift change mine was only .600 lift and .581 on the exhaust also I had +4 degrees of advance ground into mine. It worked great and was easy to tune made great power 601rwhp from a 347 H/C Vortech G-trim 6-speed 12 bolt car. And that is great from that tiny little head unit if anyone looks at the MAP's of it LOL! i don't think you will see much of a difference in power between any of the cams you have listed. The guys are right about the 112 will not kill your power out put, but it will hurt your effciency (Mileage.) Good luck on your choice. If you really want to know more try calling som of the sponcers who have built a lot of FI cars A&A, W2W, Speed Inc.,Stenod etc... And ask them their opinions you will find a big difference but in the end you will have to make up your mind, but you will atleast researched all your options. IMO I'd use the one you have already. Good luck it will be fine either way don't stress over every little detail you can always change a cam later on.

Websy21

iTrader: (34)

Unreal I want 20 g's now!

ChevyChad

iTrader: (50)

I'm using the speed inc SC1 cam and pretty happy with the results from a P-1SC 347... 632rwhp thru a M6 and 12 bolt ain't too bad at all from the little head unit

rufretic

iTrader: (37)

.598/.598, get it right Fraser lol. Yeah, I was really surprized how much boost my cam made. I was only shooting for 9psi. That 14psi with the 4.10" pulley was at only 5000rpms don't forget. I wish I had a built block to let it rip to 6900rpms with the smaller pulley. As soon as I have the th400 in, I plan to beef up the block a little and put the smaller pulley back on. Should make some serious power. Looking at a lot of the supercharger set-ups, I think it's safe to say a good N/A cam can be a good blower cam.

T/A KID

iTrader: (12)

This calculator is pretty good for determining Camshaft Overlap
http://www.wallaceracing.com/overlap-calc.php
I plugged my cam in a 224/230 on a 113 LSA and I got a 1 degree overlap
Switched to a 114 and got a -1 and to a 112 and got a postive 3.

I used your cam Refretic and I got a postive 9 degree overlap.
A buddy of mine with a Blower car that is making some nasty power is running a 224/234 on a 111 and it has a Postive 7 degree overlap.

One thing we must not forget about LSA is IMO it is like a by product of OVerlap itself and that Duration has just as much importance as Lobe seperation.
I have another friend with a D1SC and gasket match Trickflows (flow like 250) with a 236/242 cam on a 114LSA (looks blower friendly to most)
But has a postive 11 degree overlap to it. It makes 700RWHP

But like some of you have stated OVERLAP may not be a bad thing with a Blower car.
Most of you guys know who KP is (Kevin) well he is running a 232/240 on a 115 which has a postive 6 degree overlap. And his car is almost in the 8's

rufretic

iTrader: (37)

"One thing we must not forget about LSA is IMO it is like a by product of OVerlap itself and that Duration has just as much importance as Lobe seperation.
I have another friend with a D1SC and gasket match Trickflows (flow like 250) with a 236/242 cam on a 114LSA (looks blower friendly to most)
But has a postive 11 degree overlap to it. It makes 700RWHP"

Are you saying thats bad? How much boost is he running because that seems pretty good to me.

I'm not sure if your saying overlap is a good thing or a bad thing lol.

Also, you bring up kp's set-up. His car is not the norm, don't forget he was running 9s even when he had a very mild cam(I think it was a ZO6 cam). Trust me, there are not too many people running in the 9s with mild cam blower set-ups. Hell, I don't think there are many blown ls1s in the 9s period. I do intend to be another one soon though.

All I'm saying is that I don't think you need a "blower cam" to make good power with a blower. It seems like blowers work well with a large range of cams.

T/A KID

iTrader: (12)

I am saying that OVERLAP on a Blower car is not exactly a Bad thing.


He was in the 9.80's I believe with a Stock 01 Z06 cam, mid 9's with a 222/228 XE 115 LSA in the .560-.570 lift range, and now on a XER lobe fast ramp rates 230/242 115LSA. Car seems to keep getting faster and faster with each cam swap. Notice the 115LSA didn't change but with the extra duration overlap increased.

Exactly, overlap or not they will run hard

Pro Stock John

iTrader: (34)

What is kp's current cam, 230/242//114?

Well say kp went from 9.80 with small Z06 cam, to 9.1's with big cam, plus he added an electric water pump in there, and maybe also did a little weight reduction? So would he say he dropped 4-5 tenths from the cam swaps? I wonder if he would say he's also increased his mph by about 5-6?

rufretic

iTrader: (37)

I think thats an invite to join the conversation kp.

rufretic

iTrader: (37)

T/A kid,
I just relized you have a 383. I think those cams your looking at are way too small for a 383. I would go in the 240s and go up one size in pulleys. That way you could pull into the higher rpms with out spinning the blower too hard. 6200rpms is not very high, I have a feeling it's going to want to pull way past that. A larger cam will have more power up top also. 383+big cam+maxed out D1+7000rpms=big power

kp

iTrader: (34)

I forget the new cam John, 232/240 115 XER I think, whatever the one EPP sells. EWP made no difference except making me put a bigger alternator on, weight has always been within 50lbs.

I actually went 9.48 @ 144 with the 01 Z06 cam with a the D1SC 3.7 pulley at 0 DA.

Went 9.18 @ 147 with the 222/228 115 XE with the D1SC 3.7 at 0 DA. 9.13 @ 147 with the F1A at 2500' DA.

Havent been in any good weather with the latest cam and the D1SC but at 2500' DA it went 9.11 @ 149 not hooking up for crap with the F1A. MPH is up a couple in normal weather with the D1SC so the bigger cam is making more power. Not a ton more but more none the less.

IMO if I switched to a 112LSA or 110 even it wouldnt make that much of a difference except for the idle and low speed which I dont care about anyways. Might even make a little more peak power, but just like pulling my inlet hat off on the dyno and picking up 30rwhp peak makes no difference at all in ET or MPH, I take all the chassis dyno numbers with a grain of salt.

Just pick a reasonable cam according your usage plan, its not going to make a huge difference if you stay within the normal 'blower cam' boundries a few degrees either way you really cant go wrong. Thats all the cam advice you will get from me

chriswtx

iTrader: (5)

On that calculator site, its says to use advertised duration. Looks like you used .050. Which one are you supposed to use???

my cam at advertised duration and 50 degs overlap and at .050 had -3 degs...