I was just thinking the other day, LS1 powerband is already in the upper band therefore the car feels less torquey than a LT1. A larger cam would already be pushing the powerband even higher so how would the effects of single pattern cam effect the LS1? Would you see or feel an increase in the torque band or at least not have it pushed up so high with a single pat?

 

here is a scan of my single pattern TSP torquer cam 233/233 .589/.589 112lsa

the torque curve is nice an flat, and the hp peaks at a very usable rpm.

i'm anxious to see what it does with some Dart 205 heads this summer.

ps. that dyno was through a dynomouth exhaust, no roller rockers, and on a slipping clutch that is visible in the upper rpm.

i currently have upgraded to HS roller rockers, 3" Xpipe duals and a lightweight flywheel with spec 4 clutch

 

ooopss...forgot the picture

 

Ever hear of the TR224??? There is a plethora of info on it and its a single pattern grind.

 

Awsome numbers man, although i'd want a cam with a smaller profile, probably on a 115 LSA. How is the drivability on your car?

 

exactly.

When ever you can get away with running a single pattern, it's always better. The Gen III have markedly better exhaust ports than the previous years which is why single pattern cams are so prevalent.

Yes, you'd get some better torque and better effeciency by not having to open the exhaust valve earlier.

Ben T.

 

niterider, i was actually not all that impressed with the numbers. although there were some issues with it that i hope to have resolved.

first off the clutch was slipping, although it seems that the peaks were not affected. that hopefully has been taken care of with the Spec 4...which grab HARD.

second was that 6 months later when i went through to do the "bump stop mod" on the TB, i found out that the throttle blade was not opening all the way. and i don't mean due to the "bump stop"...the throttle cable was too long (mis-adjusted) and the throttle cam would stop 1/8" from touching the bump stop!!!
i was getting a reading of 100% throttle position, but the blade was only opening about 90%. between readjusting the cable and doing the "bump stop mod" it now opens 96%.

these issues combined with the free-er flowing true duals and the full roller rockers from Harland Sharp (brand new 1/2 price...couldn't pass it up) i am hoping that it is sitting at 400rwhp. even if i only picked up 10 from the exhaust and 5 from the rockers, that puts me damn close.

now DRIVABILITY

as the car sits, it's touchy as hell in traffic.

BUT
that's due to what i think is a poor tune in the lower rpms, combined with the lightweight flywheel i put in.

the car surges alot when you start it up, untill it warms up, it surges in rpm when sitting at idle in neutral when you come to a stop. and there is a window of cam surge when in gear around 1300-1600rpm.

i'm told that all this should be tuned out for the most part. and that guys are running bigger cams with little to no surge.

i'm planning heads soon, so i have not gotten it retuned. i'm waiting to do it once.

other than the touchy clutch ...due to the flywheel not holding momentum at the start...the car drives fine. i've checked gas mileage a few times both city (or my city anyway...not alot of stop and go...but all 35-45mph and short trips) and highway (75-80mph for 300miles). i've consistently gotten 18-19mpg city and 24-25mpg highway. now this is with stock 3.42 gears.


in all i'm happy with the car, since i don't drive it that much, and when i do it's in a minimal amount of city type traffic. it sounds mean, i get compliments on it all the time. and it hauls *** when i need to pass someone. and gas mileage is reasonable for what it is.

i'm REALLY anxious to see how it responds to the small runner Dart 205s and a GOOD tune. i realize i'll be sacrificing a bit of top end potential with those heads, but i think it will more than make up for it in low and mid range torque. which is what a street car needs.
in 3yrs of owning the car, and 1 yrs of being cammed...i have yet to take it to the track. someday i intend to...but not till i replace the rear...or can afford to if it breaks.

hope this helps.

but don't be afraid of a big cam, these cars tune well and give disgusting power on stock heads and boltons.
all in all

 

Don't be afraid of cams in the LS1. Because of the high-flowing heads and intake the car ALREADY makes peak torque over 4000 rpm. A cam isn't going to really make it any less driveable from that standpoint. It might move your peak torque a little higher, but we already know that the LS1 doesn't have much lowend the way it sits on the showroom floor, so it isn't a big deal.

I suggest something like the F13 or F14 cam from Futral Motorsports for daily driving.

Mike

 

236 236 .602 .602 110ls here

 

lol for a daily driver i think that is a bit large... but hey, we all have our opinions... i like the feel of the 224/224... it is amazing

 

What about the CheaTR cam? 214/230 .601/.578 117 LSA
http://www.thunderracing.com/catalog...2&sid=88#P4511

Thunder Racing Custom "CheaTR" Camshaft - 214/230 .601/.578 117 LSA. Off Idle-6800 RPM Power Band. Broad power range. Works well with stock exhaust manifolds and catalytic converters. Stock like idle. Minor tuning required on automatic transmission cars. Due to the fast ramp rate of this camshaft, the use of 1.8 rockers is not recommended.