402 Stroker Results (came up slightly short) - NA experts step inside
04-18-2013, 03:36 PM
#41
550 out of a 402 is a lot to ask.
I think that cam is a little on the small side. It's good for great overall power, but not great for chasing a number. You could swap out a cam with a 251/259 profile or similar, but you'd probably be no faster even if you hit 550...
I think that cam is a little on the small side. It's good for great overall power, but not great for chasing a number. You could swap out a cam with a 251/259 profile or similar, but you'd probably be no faster even if you hit 550...
05-01-2013, 09:38 AM
#42
On The Tree
Thread Starter
550 out of a 402 is a lot to ask.
I think that cam is a little on the small side. It's good for great overall power, but not great for chasing a number. You could swap out a cam with a 251/259 profile or similar, but you'd probably be no faster even if you hit 550...
I think that cam is a little on the small side. It's good for great overall power, but not great for chasing a number. You could swap out a cam with a 251/259 profile or similar, but you'd probably be no faster even if you hit 550...
Just hoping this cam isn't overscavenging since the exhaust side of a TFS head flows better than anything out there...270cfm on the exhaust @.600" wowzers!
I wonder what a 247/249 113-114* LSA would have done for me. I feel like these heads could do with more intake duration and less exhaust knowing what I do now...
Once I can get my dyno graphs uploaded and resized I'll start a new thread and have the pros critique.
05-15-2013, 12:10 PM
#44
On The Tree
Thread Starter
I think 247/255 on a 114* +3* advance would be more optimal for 7000rpm use without killing the torque too much, but I am still figuring out what works. I have seen guys running 246/250 cams on 112-113* LSAs and they make neck snapping torque, so duration numbers really only tell a fraction of the story for valve events.
Hope the Fast 102 and 3" exhaust being fabbed for me bring me closer to the goals!
05-15-2013, 05:44 PM
#45
What would the Tick gang have cammed this thing at using LSL lobes knowing my power goals, heads, and intake setup?
I think 247/255 on a 114* +3* advance would be more optimal for 7000rpm use without killing the torque too much, but I am still figuring out what works. I have seen guys running 246/250 cams on 112-113* LSAs and they make neck snapping torque, so duration numbers really only tell a fraction of the story for valve events.
Hope the Fast 102 and 3" exhaust being fabbed for me bring me closer to the goals!
I think 247/255 on a 114* +3* advance would be more optimal for 7000rpm use without killing the torque too much, but I am still figuring out what works. I have seen guys running 246/250 cams on 112-113* LSAs and they make neck snapping torque, so duration numbers really only tell a fraction of the story for valve events.
Hope the Fast 102 and 3" exhaust being fabbed for me bring me closer to the goals!
I also don't like using LSL lobes on the exhaust side of larger engines. I like a slower exhaust lobe to help add seat to seat overlap at TDC and aid in scavenging.
What would I do?
16
50
62
12
246/254 111lsa 107icl
