dirt track racer 81

iTrader: (45)

danny even ran the stock converter with his last big cam and took off harder that the stocker did when it wouldnt spin.. too bad it was never on the dyno

RandomHero

iTrader: (24)

Interesting. Some may remember that I ran an 11.2 in the 1/8th before I swapped converters. I gained 14 mph in the 1/8th just swapping converters, LOL.

BlackGMC

iTrader: (31)

Here is the several setups i have run on my 4.8

First was 220/220 .56x/.56x 114+4. I could only cut a 2.0 60ft with this cam, best time was 8.7. Dyno graph showed it pulled to 5800.



Next i added a 222/224 .56x/.56x 112+2. I could only cut a 2.0 60ft with the heads in my sig, best time was a 8.5, this cam peaked at 6000 before heads and 6300 after... I don't have the after graph, i lost it...



Next i switched to the cam in my sig. 214/220 .600/.597 108+2, my best 60ft with this cam was a 1.8, my best time with this cam was a 8.3, this cam peaked at 6600-6700...








So with all that, the amount of overlap really plays into where the rpm band lands and how it performs, also the DCR of the cam also helps with bottom end... And lastly, tuning, mainly spark tuning, is the key to keeping bottom end...

SincalT/A

iTrader: (16)

Go pick up the lastest issue of Hotrod magazine they have a article involving 6.0 with multiple cam swaps.

Atomic

iTrader: (42)

Big duration and wide LSA really play into where the power is made
this is a gt2-3 on a 5.3 with stock heads. 206/220 on a 118.5 which is pretty wide



peak torque wasnt made until 5000rpm with peak hp at 6400rpm

There is a reason big cams need big stalls.

Phantom

iTrader: (16)

but that isnt really considered a big cam...

Atomic

iTrader: (42)

I know, but it does show how a super wide LSA plays into things...

built408

iTrader: (10)

Who needs bottom end? Thats what converters are for.

hirdlej

iTrader: (31)

Here's my comparison on my 6L.

218/224 .562/.581 114 LSA +2 vs. 224/228 .612/.612 112 LSA +4 Only other change was tuning and a 90mm intake manifold.

006rcsb

here is a graph of the cam i am looking at getting, the cam is the comp xfi261 http://www.compcams.com/Cam_Specs/Ca...csid=1097&sb=2
the graph is from dezert1500 on gmfs.

here is a thread he made in case you were wondering how it ran and what else he has in it. http://www.gmfullsize.com/forum/showthread.php?t=151586

"Here is my dyno graph. Compare my torque @ 3000 rpm to other dyno graphs out there with larger cams. Remember to add approx 15% to my numbers if your comparing to a Dynojet or Mustang dyno. So 305rwtq corrected at 3000rpm."-dezert1500