carb'ed/procharged results-lq4
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
carb'ed/procharged results-lq4 i was on a pretty conservative tune up, 93 octane
lq4 with forged pistons, cnc'ed lq9 heads, cam-225/229, 114, 580/590, vic jr intake, 750 self modded carb, d1sc, vette dr system (in a chevelle)
@ 6200, i made 488rwhp, 5500 made 431 torq
boost was 9.8 in the intake, afr's were 11.85, intake temp was 98 degs out of the intercooler
total advance was 20 degs, plugs were tr6's, dyno was a superflow
i know i left about 50 hp on the table, but wanted a pretty safe setup
i had been running around 29 degs total advance, but found out that ls motors did not like that much timing on that fuel, unlike my past s/b's
do my #'s seem low, sure doesnt feel like it on the street, but when i look at some of the others numbers(if they are really that high) i wonder if i should be seeing higher #'s, although i was pulling away from a guy on the street who made 75 more than me(my car is super driveable as is)
im gonna make a couple passes in Sept, maybe one step colder plug, a little more rear jet, bump the timing up, and a little cam 2, lol
lq4 with forged pistons, cnc'ed lq9 heads, cam-225/229, 114, 580/590, vic jr intake, 750 self modded carb, d1sc, vette dr system (in a chevelle)
@ 6200, i made 488rwhp, 5500 made 431 torq
boost was 9.8 in the intake, afr's were 11.85, intake temp was 98 degs out of the intercooler
total advance was 20 degs, plugs were tr6's, dyno was a superflow
i know i left about 50 hp on the table, but wanted a pretty safe setup
i had been running around 29 degs total advance, but found out that ls motors did not like that much timing on that fuel, unlike my past s/b's
do my #'s seem low, sure doesnt feel like it on the street, but when i look at some of the others numbers(if they are really that high) i wonder if i should be seeing higher #'s, although i was pulling away from a guy on the street who made 75 more than me(my car is super driveable as is)
im gonna make a couple passes in Sept, maybe one step colder plug, a little more rear jet, bump the timing up, and a little cam 2, lol
i was on a pretty conservative tune up, 93 octane
lq4 with forged pistons, cnc'ed lq9 heads, cam-225/229, 114, 580/590, vic jr intake, 750 self modded carb, d1sc, vette dr system (in a chevelle)
@ 6200, i made 488rwhp, 5500 made 431 torq
boost was 9.8 in the intake, afr's were 11.85, intake temp was 98 degs out of the intercooler
total advance was 20 degs, plugs were tr6's, dyno was a superflow
i know i left about 50 hp on the table, but wanted a pretty safe setup
i had been running around 29 degs total advance, but found out that ls motors did not like that much timing on that fuel, unlike my past s/b's
do my #'s seem low, sure doesnt feel like it on the street, but when i look at some of the others numbers(if they are really that high) i wonder if i should be seeing higher #'s, although i was pulling away from a guy on the street who made 75 more than me(my car is super driveable as is)
im gonna make a couple passes in Sept, maybe one step colder plug, a little more rear jet, bump the timing up, and a little cam 2, lol
lq4 with forged pistons, cnc'ed lq9 heads, cam-225/229, 114, 580/590, vic jr intake, 750 self modded carb, d1sc, vette dr system (in a chevelle)
@ 6200, i made 488rwhp, 5500 made 431 torq
boost was 9.8 in the intake, afr's were 11.85, intake temp was 98 degs out of the intercooler
total advance was 20 degs, plugs were tr6's, dyno was a superflow
i know i left about 50 hp on the table, but wanted a pretty safe setup
i had been running around 29 degs total advance, but found out that ls motors did not like that much timing on that fuel, unlike my past s/b's
do my #'s seem low, sure doesnt feel like it on the street, but when i look at some of the others numbers(if they are really that high) i wonder if i should be seeing higher #'s, although i was pulling away from a guy on the street who made 75 more than me(my car is super driveable as is)
im gonna make a couple passes in Sept, maybe one step colder plug, a little more rear jet, bump the timing up, and a little cam 2, lol
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
i had pretty much used 6200 as a cutoff, although we took it up a little over, but power was dropping off anyway-i think more jetting, timing might have kept the power going-it was a pretty high stall, i wanted to switch to low stall(switch/pitch turbo 400) but decided it was to much to remember to throw the switch and look at everything else at the same time
im sure the cam isnt ideal for the setup, but it was a package deal with the heads from Patriot Perf-i would have liked to dyno it with the z06 cam and 317 heads, but never did
the 2.5 full exhaust prob didnt help out a lot either
i pulled a plug after every pull, timing, jetting, heat range all looked good
i guess it is what it is, would like to try a diff cam, maybe with 112 lobe spacing, but i kind of like the torq down low to get this boat moving
Sept 19 i'll make some passes, see where im at, gonna have a little grudge run with a big motored car
im sure the cam isnt ideal for the setup, but it was a package deal with the heads from Patriot Perf-i would have liked to dyno it with the z06 cam and 317 heads, but never did
the 2.5 full exhaust prob didnt help out a lot either
i pulled a plug after every pull, timing, jetting, heat range all looked good
i guess it is what it is, would like to try a diff cam, maybe with 112 lobe spacing, but i kind of like the torq down low to get this boat moving
Sept 19 i'll make some passes, see where im at, gonna have a little grudge run with a big motored car
On The Tree
Joined: Aug 2008
Posts: 125
Likes: 0
From: Maryland
That wouldnt happen to be a red 72 chevelle w/ a 572 now would it? LOL.
I think you got him covered. You both made similar #s on my wheel but I think he's carrying a little more weight.
