Hey guys theres a comp cams xe264HR cam for sale on the classifids and i was lookin on Jegs site for more specs and the LSA is a 110* and i was woundering if something like that would be good for a boosted application? also do you guys think the cam might be too big for my little 310?

edit: also ill have a 2400-2600 stall converter soon, and i have 3.73 gears right now. if that puts any factor into chosing the right cam. i think it does. hope someone can help. thanx

 

"boost" cams generally have 113 and wider LSA's to keep boost from exiting the exhaust valve during overlap. You should specify wether you're going with a turbo or a supercharger because the cam specs for each are very different. HTH

 

oh im goin with the BBSDesigns turbo kit. the kit has a Turbonetics T62-1 turbo. plus ill be runnin carb until i can afford to convert to EFI.

 

Definitely the wrong cam for that application. You'd probably want something split pattern favoring the intake side, or at least single pattern with a wide LSA. If you're going to buy a brand new cam, people seem to be doing good with cammotion, but compcams wouldn't be a bad choice either. Otherwise, stock grinds seem pretty well suited to turbo applications if you don't feel like shelling out the cash for a brand new cam. HTH

 

ok kool thanx for the help.

i was just lookin on Jegs and they have an Edelbrock Performer RPM hyd. roller camshaft. specs
Engine Size: 283-400
Adv. Duration: 296°/300°
Duration @ .050'': 234°/238°
Gross Lift: .539''/.548''
Lobe Sep.: 112°



how does that sounds for a cam for a boosted appl. ?

 

I'm definitely with the "concensus" view here. I was in the exact same situation (and still am since I've yet to do the installation) about 3 weeks ago when I was deciding which of Crane's 50-state legal grinds to go with. I have a 305 with a Vortech and the stock "peanut" cam. I was stuck between 104211 and 104221. 104221 (Crane 2030) has 204/214 with 116 degrees of lobe separation. I went with it simply because of its large lobe separation. I got the "nudge" in that direction from the Crane tech hotline. It also bears mentioning that the numbers that Vortech claims for its "before" and "after" figures are for vehicles with the manual tranmission (which do not have the peanut cam). The Crane numbers are very similar to the stock 305 manual/ 350 cam for third gen's of 89-92 vintage. The lift numbers on the Crane are slightly higher, however. My two cents: look for something with 114 or more degrees of lobe separation.

 

You would still want something with more intake lift and duration than exhaust, and the lift and duration on that cam are probably a little more than you need. If you're going to buy a new cam, it would be best to call a few of the manufacturers tech lines and see what they reccomend. The beauty of boost is that you don't have to go with a huge cam and sacrifice idle quality. There are a lot of factors that will affect your cam selection that we havn't discussed yet, and honestly all I'd be giving you is my best guess. Give comp a call or go to cammotion.com and submit a cam request and let us know what they say.

 

voila

 

...


EDIT - ok pic wont post ..

http://www.compcams.com/Technical/Cu...ML/128-169.asp


you have a few examples in the blower- turbo section

 

dude thanks for the link. ive looked thru comp cams site but not that far into it before and i found the cam.

Its there Xtreme Turbo cam. XT262H
rpm range: 2200-6400
Duration:
Advertised- In. 262 Ex. 269
@.050 lift- In. 222 Ex. 226
Valve Lift with 1.5 rr In. 462 Ex. 455
LSA 114*

i think i might get that cam since im gettin a 2500 stall converter ill be in my power band really quick or ill go withthe 256 cam which is a bit smaller and a smaller LSA.

 

Actually, I already bought Crane 2030, so I'm pretty much set on this particular grind. I went with it for several reasons. One, it's 50-state legal. Boring, maybe, but in California, it just doesn't make sense to risk having to put something else back in for an emission test. My time is really limited. Two, this cam is the only one (as far as I know) of the six original street-legal grinds that has a large enough lobe separation to truly allow the blower to do what it should in the midrange and upper rpm range. And, three, it bears a striking similarity to the stock 305 manual cam that came in TPI Camaros of similar vintage. The stock manual cam is actually 207/213 I believe, so I really cannot see how 204/214 would be too much for my combination. I really should have mentioned all this in my initial post, but I was pressed for time and I didn't. However, any and all information received here is welcome. That's the true beauty of having a forum like this: It puts a lot of like-minded enthusiasts in one place, and allows them to share information.

 

That looks more like what you need. I thought you were looking for a hydraulic roller though?

BTW, there are a decent amount of cams not listed in their catalog especially turbo grinds.

 

id like to switch to hyd. roller but if i can oh well notthe end of the world, just end up savin money. but i really would like to go roller.

 

I wouldn't worry too much about it if it's not in the budget. Conversion lifters aren't cheap, plus pushrods, cam button, etc, it gets really expensive. 1.6 rocker arms are a good idea if you had planned on swapping rocker arms anyway. That way you can get a little more lift without adding duration, very similar benifits as swapping to a roller.

 

hmm wasnt thinkin of goin with the 1.6 since comp cams gives the specs for the cam ill be gettin in 1.5 rockers. but more then likly ill squeez out some more cash and get the 1.6 pro magnum roller rockers. my friend has them on his 90 1LE and said he noticed a slight improvment.