L82 HP Boost
#21
Le Mans Master
Why would you figure that it would take 11 to 1 compression to 400 gross hp? I don't see it that way, 400 should be obtainable at 9/9.5 to 1 afr shows several combos making that. Given the fact that aluminum heads disapate heat he could go 10 to 1 with the right cam shaft and not have any issues.
1. I was referring to new Aluminum heads and using the L-82 cam, 400 hp was probably not realistic.
2. I am hoping for 400+ with the AFR heads and 10-10.2:1 compression with the Retro Roller Howards cam-.525/.525, LSA 110, 219/225 duration and I am going to be iffy hitting over 400+ gross HP. Trying to hit 400 with 9-9.5:1 is really iffy. My builder for the bottom end confirmed my estimates so if I can barely make it to 400+, definitely not happening with 9:0-1, AFR's or not, MAYBE with 9.5:1, pretty good to go 10:1. I hope that I am wrong, and you are right.
3. 370 HP LT-1's had a solid lifter camshafts with 11:1 compression in 1970-granted old technology and heads etc-but could only muster-370 Gross HP.
Hope that explains.
Last edited by jb78L-82; 04-23-2014 at 12:08 PM.
#22
Le Mans Master
it doesn't , there were and are 350/350 cammed engines running 400 h.p. headers , good intakes , properly set up carburetors. and most importantly much improved cylinder head flow. with 9-1 compression it is an uphill battle but going to 10-1 changes a lot . we had more than a few 350 engines making that power 30 years with ported turbo heads and double hump heads.so with newer heads it is pretty easy. it can be done.
#23
Safety Car
For three reasons:
1. I was referring to new Aluminum heads and using the L-82 cam, 400 hp was probably not realistic.
2. I am hoping for 400+ with the AFR heads and 10-10.2:1 compression with the Retro Roller Howards cam-.525/.525, LSA 110, 219/225 duration and I am going to be iffy hitting over 400+ gross HP. Trying to hit 400 with 9-9.5:1 is really iffy. My builder for the bottom end confirmed my estimates so if I can barely make it to 400+, definitely not happening with 9:0-1, AFR's or not, MAYBE with 9.5:1, pretty good to go 10:1. I hope that I am wrong, and you are right.
3. 370 HP LT-1's had a solid lifter camshafts with 11:1 compression in 1970-granted old technology and heads etc-but could only muster-370 Gross HP.
Hope that explains.
Last edited by bluedawg; 04-24-2014 at 01:18 AM.
#24
one type of mouse:
Ported Miniram 355
AFR 195 Eliminators
1.6 roller rockers
Comp Cams 280XFI with a 114 LSA
SLP 1 5/8 shorties with 3 inch Magnaflow exhaust (cat delete)
Built 700R4 with 2000 stall
Tuned by Kevin91Z
another type of strange mouse:
Ported Miniram 355
AFR 195 Eliminators
1.6 roller rockers
Comp Cams 280XFI with a 114 LSA
SLP 1 5/8 shorties with 3 inch Magnaflow exhaust (cat delete)
Built 700R4 with 2000 stall
Tuned by Kevin91Z
another type of strange mouse:
Last edited by bebezote; 04-24-2014 at 04:06 AM.