How much boost is safe to run on lq4 with milled heads
Jun 12, 2008 | 04:13 PM
#11
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From: In a van DOWN BY THE RIVER
There is nothing wrong with a 112* lobe center with a supercharger, if you were running a turbo I would go wider. I just made 700FWHP with a Gen 1 383, 7.8: cr, 224/236@ .050'', 112*. That was with an old marine 2.2L non I/C, Whipple charger @9psi
I know that's not earth shattering, but I think it is decent for a 9psi, non I/C, 91 octane @6500' elevation.
I know that's not earth shattering, but I think it is decent for a 9psi, non I/C, 91 octane @6500' elevation.John
Jun 12, 2008 | 04:22 PM
#12
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Ya my 383 is only 7.8:1, but I was able to run 35* of timing. The engine picked up almost 60HP 30* vs 35*. With 9.8:1 You better start with like 15* and work up from there.
Jun 12, 2008 | 04:30 PM
#13
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From: In a van DOWN BY THE RIVER
John
Jun 12, 2008 | 04:55 PM
#16
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Will work if you plan on spinning the engine up to 65K or more. You will need at least a 4.10 or better a 4.56 gear. I like that one better than the HOT cam I think it will make more torque. Why don't you find a 5.3, put the cam in that, and save your 4.8 incase you ever sell the truck or something? You can pick up 5.3's cheep if you look.
Jun 12, 2008 | 06:49 PM
#17
Will work if you plan on spinning the engine up to 65K or more. You will need at least a 4.10 or better a 4.56 gear. I like that one better than the HOT cam I think it will make more torque. Why don't you find a 5.3, put the cam in that, and save your 4.8 incase you ever sell the truck or something? You can pick up 5.3's cheep if you look.
Dustin
Jun 13, 2008 | 02:23 AM
#18
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Just got the 4.8 and swapped it in, and i wont be trading this truck any time soon, just checked today, we owe about 6k on it, i bought the thing new, and i believe in working with what you have, i have a 4.8, im not looking to be the fastest, just want to have some fun. I am going to do the cam, then bolt ons, then do the drivetrain, i plan on a T-56 and 4.10's, but the 4.10's will most likely go in first with a new diff while i have the 5 speed.
Dustin
Dustin
Jun 13, 2008 | 03:48 AM
#20
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. 215 isn't to far past my recommendation
. What price did those guy's give you? PM me so we don't ***** up this guy's thread.
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