What camshaft for drag race only lq4 w/l92s
02-09-2016, 11:10 AM
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What camshaft for drag race only lq4 w/l92s I've got an LQ4 WITH l92s milled .020...right now I'm running the LG G5X2 that I got for free, victor jr l92 and a 750 dp...the car is an s-10 blazer with 8.8 3.73s, cal tracs, th350 with a 4500 converter....runs o.k. but I'm ready to up my game...truck doesn't see much street time...not worried too much about street driveabilty...also has pretty small street headers..looking for the correct header and camshaft combo...any help would be appreciated..may eventually go blow thru
02-10-2016, 04:45 AM
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02-10-2016, 01:58 PM
#8
I've got an LQ4 WITH l92s milled .020...right now I'm running the LG G5X2 that I got for free, victor jr l92 and a 750 dp...the car is an s-10 blazer with 8.8 3.73s, cal tracs, th350 with a 4500 converter....runs o.k. but I'm ready to up my game...truck doesn't see much street time...not worried too much about street driveabilty...also has pretty small street headers..looking for the correct header and camshaft combo...any help would be appreciated..may eventually go blow thru
02-10-2016, 05:57 PM
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IT IS A 112+2 LSA THATS ALL I CAN REMEMBER...THE TRUCK IS SO LAZY OUT OF THE HOLE SIXTY FOOTS ARE MID TO HIGH 1.70s....AFTER THAT SHE TOTES THE MAIL...NO THE PISTONS ARE NOT CUT...I WILL DO SO IF NECESSARY...ALSO AS MENTIONED ITS GOT TINY HEADERS...WAS GOING TO STREET IT AT FIRST BUT UNDERESTIMATED HOW QUICK IT ACTUALLY WAS...
02-10-2016, 06:26 PM
#10
so far your cam isn't "ideal" your exhaust is way too small and your carb is potentially too small. I would fix the exhaust first then work on the tune. even though the cam/carb isn't perfect, it has a ton left in it with real exhaust and some tune time.
02-10-2016, 06:30 PM
#11
While that cam is not exactly ideal for what you are doing, that 60' is really slow for that combo. And, even though the cam and headers are not ideal, I think your main issue or more likely in the stall converter or the tune. With a good 4500 stall, I would expect your combo to be in the 1.5s on the 60'. And your ET should be about 1/2 second quicker for your MPH.
02-10-2016, 09:50 PM
#13
Long tube headers are a must with a camshaft that has that much overlap.
Reversion from the short tube headers is killing your low end power. Every single set of short tube headers I've ever seen have horrendous collectors that do nothing to help scavenging. Scavenging and overlap are supposed to go hand in hand when it comes to helping boost volumetric efficiency(power output).
Not to mention the IVC event on that cam is much too late for a single plane which will also hurt the bottom end and mid-range power output.
I'd also step it up to 3" exhaust if there is room.
Reversion from the short tube headers is killing your low end power. Every single set of short tube headers I've ever seen have horrendous collectors that do nothing to help scavenging. Scavenging and overlap are supposed to go hand in hand when it comes to helping boost volumetric efficiency(power output).
Not to mention the IVC event on that cam is much too late for a single plane which will also hurt the bottom end and mid-range power output.
I'd also step it up to 3" exhaust if there is room.
02-10-2016, 10:10 PM
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Long tube headers are a must with a camshaft that has that much overlap.
Reversion from the short tube headers is killing your low end power. Every single set of short tube headers I've ever seen have horrendous collectors that do nothing to help scavenging. Scavenging and overlap are supposed to go hand in hand when it comes to helping boost volumetric efficiency(power output).
Not to mention the IVC event on that cam is much too late for a single plane which will also hurt the bottom end and mid-range power output.
I'd also step it up to 3" exhaust if there is room.
Reversion from the short tube headers is killing your low end power. Every single set of short tube headers I've ever seen have horrendous collectors that do nothing to help scavenging. Scavenging and overlap are supposed to go hand in hand when it comes to helping boost volumetric efficiency(power output).
Not to mention the IVC event on that cam is much too late for a single plane which will also hurt the bottom end and mid-range power output.
I'd also step it up to 3" exhaust if there is room.
02-10-2016, 10:11 PM
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While that cam is not exactly ideal for what you are doing, that 60' is really slow for that combo. And, even though the cam and headers are not ideal, I think your main issue or more likely in the stall converter or the tune. With a good 4500 stall, I would expect your combo to be in the 1.5s on the 60'. And your ET should be about 1/2 second quicker for your MPH.
02-11-2016, 10:02 AM
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the truck weighs around 3000 lbs...i was thinking headman huslers they make an 1 7/8 long tube for the s-10 but ive read they won't clear..idk..maybe i can modify them...as far as the camshaft goes i'm open for replacement...i can use this cam in another 5.3 ive got
02-11-2016, 10:29 AM
#18
what year blazer? I thought the only real difference between the s10 frame and the blazer frame was the wheel base...
with the hedman 1 7/8 headers, they split the frame. the fit is TIGHT so you may need to use their motor mounts to ensure proper fit. I had to get tubular uppers for them to fit with my truck sitting low. speedway sells uppers for 40 per side, but they don't give as much downward travel since it's a straight control arm. I didn't have a problem with them not giving enough travel though.
with the hedman 1 7/8 headers, they split the frame. the fit is TIGHT so you may need to use their motor mounts to ensure proper fit. I had to get tubular uppers for them to fit with my truck sitting low. speedway sells uppers for 40 per side, but they don't give as much downward travel since it's a straight control arm. I didn't have a problem with them not giving enough travel though.
02-11-2016, 10:37 AM
#19
current performance advertises the stainless works header for the s10 and blazer as long as you use their mounts. you have to trim a bit off of your bell housing around the starter to fit the header, but it's the only in the frame 1 7/8 option.
02-11-2016, 11:13 AM
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i've got the current performance mounts on the truck and i've already trimmed the ears off the bell housing