I finally had a few minutes to stop & scan a few of our stock head camshaft dyno sheets.

Test Engine Specs:
LS1 241 Heads
PRC Doubles
TSP Pushrods
Fast 92mm Intake

The following dyno sheets help to compare the following camshafts:

228/228 .588/.588 112 Camshaft
231/234 .643/595 111 Camshaft Torquer 3
235/240 .655/609 111 Camshaft TSP/XER *TSP Custom Int. Lobe Texas Tsunami
239/242 .647/610 111 Camshaft MS4
240/244 .609/595 112 Camshaft *********
244/248 ???/??? 112 Camshaft *******

Feel free to look these sheets over & shoot us over any questions if you have them. These are just a few of the camshafts we tested. I actually tested several 235/240 duration camshafts checking how the new TSP specific lobes comp's engineers made us. They worked really well & seem to get a couple horses over the LSK lobe.

Tuning changes were kept to a minimum during these tests. We used locked timing & only moved the fuel slight amounts to try to keep the stock computer as close as we can. While this isn't a perfectly ideal tune for any of these camshafts, it helps to show differences in the cam designs.

I'm sure just like all the other engine dyno threads several people will decide to question or hammer our dyno results. If you don't like the results, then just ignore this thread. I'm tired of people with no engine dyno experience getting in threads & tossing out there theories they developed from reading posts on the internet. This is a back to back comparion designed mainly for us to confirm how our camshafts work against the competitions camshafts & research lobe development for both us & Comp.

I have several different smaller lobe dyno sheets I'll be scanning & adding later on it the day.

Take specific notice to the TSP camshafts at all rpm ranges, the 3000 numbers are considerably higher than some of the other larger camshafts at lower rpm's. I also tested a 243 LSK intake lobe camshaft & while it make 2hp peak better than the MS4, it was lazy down low for the 2hp it gained. Hopefully we'll get to test a 239 TSP lobe on the MS4 camshaft in the upcoming weeks. I'll keep you guys posted on how that works.


Baseline
http://www.precisionracecomponents.com/stock.jpg

228R
http://www.precisionracecomponents.com/228r.jpg

Torquer 3
http://www.precisionracecomponents.com/torquer.jpg

Texas Tsunami
http://www.precisionracecomponents.com/tsunami.jpg

Magic Stick 4
http://www.precisionracecomponents.com/ms4.jpg

240/244 Customer Supplied
http://www.precisionracecomponents.com/240244.jpg

244/248 Customer Supplied
http://www.precisionracecomponents.com/244248.jpg

 

Magic Stick 4
http://www.precisionracecomponents.com/ms4.jpg


not working

 

Fixed!

 

i think its nice to see that jumping up so much in duration only shows marginal gains in power, and pushes the peak hp 3-500rpm higher.

that 228 is a badass cam.

although the torque graph on that last cam should be sick. it sits at 433# (+/-1) from about 5000 to 6000rpm.




would be alot of work, but would be badass to see a head comparison with each of those. better yet...a whole bunch of head comparisons.

something looking at different runner sizes in particular....or "quality"

the stg 2.5 5.3L heads
the AFR 205
the AFR 225s
TFS 215s
dart 205s
terminator 200s

things like that

 

 

I think the Magic Stick 4 is an awesome cam. But is very high lift and thats probably why it has such high amounts of torque. They all have good curves mainly the 228R and the Magic Stick 4. Good job guys.

 

Yeah it is cool to checkout how little duration changes it. For max effort with extra compression the bigger cams really begin to shine, but for smaller duration the little cams do really well.

Just wait until we finalize our newer lobes on the smaller camshafts. Maybe we can get a few extra horses over these XER lobes!!

 

I have dyno results from several different heads, but honestly I don't want to get bashed... Sorry

 

Nice results between the cams.

The cylinder head info might start a war, haha.

 

I graphed the HP curves for each:

 

love to see you do a 224/224 .581/.581 @112lsa and see the results...

thats the cam im running and the current #'s im putting down...

 

animul: Thanks for that! I was just telling the guys we should plot them out! Mind doing torque as well?

 

Sure, I'll post that after lunch...

 

glad to see finally posted up some results. i say post the head comparison up and if anyone starts bashing, just have a mod come in, edit the bashing posts, and lock the thread so ppl can still see the results. we need all that info. id love to see it after you said in the other thread how the 5.3 stage 2.5s were the best bang for the buck.

that Tsunami cam looks pretty cool. knocking on MS4 numbers with less duration, but yeah, that is alot of lift! haha. maybe thatll be the new cam everyone buys for big lift, seeing as so many newbs want the MS4 for that alone! that last one looks like itll be a beast too!

 

Gotta love 75hp gains from a 228R cashaft! I'll find the 224R graph, I think she gained 70hp!!

 

Nice job Jason. 2 questions I have though, 1st why is the oil pressure so HIGH, and 2nd why are you making the pulls with the engine so COLD?

 

Very good thread bro....I like to see those comparisons!!

 

TQ Comparison:

 

Thanks for posting! I'm surprised and impressed with the 228R. Also, gotta admit that MS4 is a bad cam.

Thanks animul for the charts!

 

"I have dyno results from several different heads, but honestly I don't want to get bashed... Sorry "

yeah didn't you get bashed for that header comparison? lame in my book.

it's pretty damn hard to do an honest comparison...you guys did the best for what you wanted to test. i'm glad you did.


any chance of PMing me the head info? email?

thanks

i've got your Torquer V1 cam and have been back and forth on heads. as much as it would be nice to save $1000-1500 on heads by going budget....i'd like to make good power too.
particularly for a street car. 5yrs and its never seen a track...or even an honest street race....just spirited driving.

so i'm leaning towards small runner, good flow, aftermarket castings....Terminators or AFRs.