stealthramman

Which cam?? Recommendations?

Hope you guys that have done the HSR swap can help me out.

355 HSR, 1.6 full roller rockers, AFR 190 heads, headers/exhaust, 700R4 with 2800 stall. 3.45 rear gears. custom programmed chip.

I'm currently running a tiny comp. cams roller 210int./220exh. with .480" lift (.512 with 1.6 rockers) and a 112* lobe seperation.

I want to increase the usable RPM, make good street torque, but take advantage of the good heads for some big HP and RPM.

I want to maintain decent highway mileage and have a strong midrange. My cruise RPM is about 2500 (+-).

jzajac1

If you want to maintain your mileage but have strong mid range the GM Hot Cam is a good choice. Since you already have the 1.6 rockers you don't need to buy the kit for $500 just buy the cam, it's about $280. If you want big HP then your mileage will suffer because you'll have to get a cam in the 230/236 duration range with about .550 lift. Can the valve springs you have on the heads now handle .525 lift (hot cam with 1.6 rockers)? I have the Hot Cam in a HSR setup and I have taken it as far as 6500 rpm and it pulled smoothly up to that point, I didn't dare to wind it up anymore than that.

Black6SpdTA

Someone on this board, mrr something, I think is running a CC306 with very good results

stealthramman

this isn't exactly a CC306, but this type of cam is a bit much!!


305H Magnum™ should really be considered for Pro-Street type cars where actual streetability is not a major concern. The design of this cam also makes it ideal for all bracket racing engines. Major engine modifications are needed as well as transmission and driveline improvements. The 305H works best in large C.I. engines and has a radical idle.

aklim

I am getting a cam from here and they will be installing it and using a HSR later. Give them a shout.

stealthramman

with the exception of the 383, your combo will be very similar. I'd be very interested to see the results of the cam/ stealth ram combo on yours.

Keep us posted!! Any pic's??

formularpm

Well, you cant have your cake and eat it too, somewhere youre going to have to make a comprimise. For example, if you want big "hp and rpm", maybe gas mileage shouldnt be a main concern? For what you are looking for, I wouldnt use Hotcam in your combo. Youve already got decent gearing and a 2800rpm stall, youre "streetability" wont suffer with more duration. A good comprimise would be an XR276HR-112* Comp, there are numerous HSR/XR276HR combos out there and most seem pretty happy with it. This would definitly increase your usable rpm compared to your current cam, idle decent, and produce a strong midrange.

Fenster

I wouldn't go w/ less than the XE276 cam. (224/230 .503 .510) w/ you setup and a HSR. Buddy in a LT1 car is running 12.32s w/ ported heads and that cam and ported heads.

He passed emissions fine too.

If it was me I would run a 230/236 probably. Although w/ the 355 I am building now I am going to run a custom COMP cam that Combination motorsports setup. Its a 227/233 .560 .569 on a 112 LSA and a 109 ICL. I figured it would be a good comprmise between the 224/230 and the 230/236 cam!!! Plus it had the lift #s I wanted to match w/ my heads.

stealthramman

nice to know what cams you guys are running and the results you're getting!! Very appreciated. Thanks!!

stealthramman

anyone elseout there using a Stealth Ram care to comment?