Hey guys, After reading thousands of post in the LT1 tech and trying N/A for a while, i finaly got a blower, and now i dont know alot about the motor acpect of them.

Car:
97 daily driver camaro ss
3.42 6spd..blah blah

Motor
Forged 355
Eagle 4340 forged crank 3.48
Eagle 5.7'' 4340 H-beam rods
SRP 4.030'' -24cc dished pistons

Fully ported Heads and intake 2.02/1.57
heads flow:
Intake Exhuast Lift
226 184 .400
243 193 .450
256 201 .500
269 207 .550
273 .575
274.5 209 .600
213 .650

I also have the comp "r" type lifters so i guess i can have a steper lobes.

Cam motions recomend a "X2161-2222-14+4" 214/224 dur 531/540 lift (1.6) on a 114LSa 110 centerline
I dont thinks thats enough lift nor did they want to see flow sheets

I like these guys cams alot tho http://www.cmotorsports.com/engine/l...ft-design.html
Particularly the: TS-224XH 224/236 duration, .605"/.622", 114lsa
and TS-221XR 221/233 duration, .542"/.569", 114lsa
Although they have many to chose from

I want something mild of course, hate the huge cam things, but i want it to work well with a blower, and that part i dont know much about.

I read Rkrouse is going high lift on a 116lsa?
Sugjustions anyone? thanks!

 

Alot of people have had good success with the 224-236 on a 114lsa. This is the cam I have in my car and I like it. Doesnt give alot cam surge and its not that lopey. Based on your flow number, the high lift version maybee up your alley.

 

same here, i choose the XE224/236 cam on a 114...but with 1.6 RR you're looking at .555 lift not .6+ unless your using larger ratio rockers or something.

it's a stout streetable cam that is made for boost, not too much lope and not bad on cam surge. it's about max for stock head castings that are ported well.

looks like you've got a good start!

 

Comp has both high and low lift XE lobes with 224 and 236 duration at 0.050". That's where the confusion about lift number comes up.

Which to choose? Partly depends on how much spring you are willing to run and how high you want to spin your motor. I'm a fan of the high lift versions, using strong springs, and pulleying up the blower to provide max boost in the 6,000rpm range. The high lift (#3192/3196) lobes on a 116LSA with 1.5 rockers, and #977 springs worked well for me.

Rich Krause

 

They make a TS-224XH. same thing but with more lift.

Question for you cam guys, What makes a cam less steetable?
I always thought it was maily duration a lsa right? And i have been told that actully more lift will make it more streetable.

rskrause, do you think this cam ground to a 115 or 116 lsa would work best for me? Im just trying to imagine why you would want 116 lsa, im guees more the power band and to tame it down a little?
and by "(#3192/3196)" i assume thats the XE lobes?

 

The wider LSA broadens the torque band and improves vacuum at idle. Keep in mind that a 116 degree LSA is still narrower than many stock cams (stock LT1 is 117 degrees).

What makes a cam less streetable is actually a pretty complicated subject. What really counts is the timing of the valve events. Without reference as to the "why", narrower LSA and longer duration (especially intake) will narrow the power band, raise the rpm for peak power and torque and decrease power and torque at lower engine speeds. Idle quality and the ability to operate smoothly with decent throttle response will also deteroriate as the LSA narrows and the duration increases. You can end up with a really poorly running combo when there is a big "mismatch" between parts. If the cam is large but the heads and intake are restrictive you can end up with poor operation at low speeds and fails to make power at high speeds.

Rich Krause

 

cmotorsports listed the 224/236 with 1.6rr at .555 lift and good up to 6400 rpms. i was thinking about adding a hydra rev kit to be safe. also want to run 12-14#'s to start off with. should i be ok for revving into the 6000+ range?

 

I don't think the Hydra Rev does much. Others swear by it. Just get good springs. I ran the high lift 224/236 to 6,600 with no problem using Comp #977 springs.

Rich Krause

 

Comp's web site lists max lift on the 977 springs at 0.600". Would using them on a cam with 0.610" lift be too close to spring bind? The 929 spring looks very close (my heads are already setup for the larger diameter) but have a max lift limit of 0.650". Would these be a better choice for this cam lift?

Thanks

 

The #929 will accomodate more lift with the proper installed height. You will need to machine your spring seats to allow for the larger OD.

Rich Krause

 

If it is a daily driver like you say, I would tend to go with a smaller cam, not bigger. Remember too with a blower, you don't really need a big cam at all. How about the CC305? Have you talked to comp cams? Also, you can run the combo's on engine simulator dynos, like dyno 2000. Starting with 12-14 pounds of boost is quite bold if you ask me.