Bottom end mods for a boosted LQ4?
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Teching In
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Bottom end mods for a boosted LQ4? Hey guys,
I have a stock LQ4 that I'm going turbo with & I'm wondering what you guys are doing to help the lower end hold up to boost? I'm hoping to run 8-12psi. I'm putting some ARP head studs in so would putting ARP main studs &/or ARP connecting rods bolts in be worth it? Or am I better off leaving the bottom end undisturbed? Thanks in advance for any advice!
I have a stock LQ4 that I'm going turbo with & I'm wondering what you guys are doing to help the lower end hold up to boost? I'm hoping to run 8-12psi. I'm putting some ARP head studs in so would putting ARP main studs &/or ARP connecting rods bolts in be worth it? Or am I better off leaving the bottom end undisturbed? Thanks in advance for any advice!
Why does everyone think that rod bolts are required to make HP? HP has no effect on the rod bolts, besides, the later 6.0s have decent rods/bolts. The only effect on rod bolts is rod weight, piston weight, stroke, rpm, and backpressure. Not hp. Besides, if you do rod bolts, you really need the rods resized.
Maybe I should clarify on the rod bolts, if you plan on spinning it high then do the rod bolts. I've been running completely stock bottom end, minus cam, for about a year now on 8-10 psi and haven't had any problems. In the end it's all up to you, what gives you the best peace of mind.
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9 Second Truck Club
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From: Colorado Springs, Co/ Central, Ca
I would prob go with the head bolts, or studs if you don't mind spending the $, but Unless you plan on turning past 65-68k I wouldn't mess with the bottom end. Those rods can get wierd when changing the bolts. You could compromise longevity more by changing the bolts then leaving it alone.
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Thread Starter
Teching In
Joined: Aug 2010
Posts: 25
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I would prob go with the head bolts, or studs if you don't mind spending the $, but Unless you plan on turning past 65-68k I wouldn't mess with the bottom end. Those rods can get wierd when changing the bolts. You could compromise longevity more by changing the bolts then leaving it alone.
What kind of power can an LQ4 block handle?
Launching!
Joined: Dec 2007
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From: Geelong, Australia
You need to align hone the block if you change the ARP main studs. Probably not required for the power level you want, but I'd do them before I worried about ARP rod bolts. If you aren't hitting high RPM constantly the standard rod bolts will do the job fine.
Thread Starter
Teching In
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What kind of RPM's are we talking?
doing them one at a time is almost the only way to do it anyways, you need it bolted down to remove the bolt and the stupid little deal inside the rod as well.
Forgive me for not knowing what its called.
Mine are changed as well, arp2000 and ive been dead worried that i shouldnt have done it. ive got probably 100 miles on it so far, maybe more since the install and start up. Ill be changing the oil in a week before top end tuning is done, so ill check for crap then, but so far so good.
Forgive me for not knowing what its called.
Mine are changed as well, arp2000 and ive been dead worried that i shouldnt have done it. ive got probably 100 miles on it so far, maybe more since the install and start up. Ill be changing the oil in a week before top end tuning is done, so ill check for crap then, but so far so good.
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
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From: Colorado Springs, Co/ Central, Ca
10.50's in my truck snapps the early style rods in half. Everything else in the engine was in perfict shape. I think the newer HD rods could take a little more.
Hey Jeritt, it's Tony. Haven't seen you on the site lately. I wanted to tell you I picked up two 05+ 6.0 rotating assemblies that were running, also got a block, another set of 317s and some other goodies. I'm going "budget" 6.0 after the 4.8 blowtorches. When are you gonna be back in california pal? Last time we talked, you were looking at another crank, etc.
Thread Starter
Teching In
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doing them one at a time is almost the only way to do it anyways, you need it bolted down to remove the bolt and the stupid little deal inside the rod as well.
Forgive me for not knowing what its called.
Mine are changed as well, arp2000 and ive been dead worried that i shouldnt have done it. ive got probably 100 miles on it so far, maybe more since the install and start up. Ill be changing the oil in a week before top end tuning is done, so ill check for crap then, but so far so good.
Forgive me for not knowing what its called.
Mine are changed as well, arp2000 and ive been dead worried that i shouldnt have done it. ive got probably 100 miles on it so far, maybe more since the install and start up. Ill be changing the oil in a week before top end tuning is done, so ill check for crap then, but so far so good.
EDIT: What is the part number for the ARP head studs as well?
Last edited by TheNorthSideWhiteGuy; Apr 3, 2011 at 09:12 PM.
I have the ones that are different lengths. and some are all equal length, you'll need to figure that out first.
And as far as rodbolts, i really dont remember, give me a second, i have a thread that i started here about this awhile back, its got the number in it i think, ill check...
EDIT: The thread didnt have the part numbers, just a link to the auction where i bought them, but it has been removed.
Last edited by JAX04; Apr 4, 2011 at 07:00 AM.
