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Old 03-14-2016, 04:50 PM   #21
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Are the heads 243 or 799 op ?
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Old 03-19-2016, 08:20 AM   #22
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no 706 heads.
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Old 03-19-2016, 08:48 AM   #23
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4.8's are fun little engines too but with above I wouldnt spend any coin on aftermarket heads etc. Cam only? Sure why not. Something like a 218/222 XE lobe comp with PAC 1218 springs, new pushrods and some long tube headers + decent exhaust will be a stout little package. Leave stock heads, intake, throttle body, ecm etc etc etc but add a decent stall if running auto.

Then build a bigger cube engine while driving this one to swap later if you find the power isnt enough for you.
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Old 03-23-2016, 07:17 PM   #24
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I've been building the truck for about 4years and will soon need a engine and transmission installed.
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Old 03-23-2016, 08:26 PM   #25
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Id build an NA 4.8.... Would be fun.

BUT, it would be a low torque, high rpm sleeper. Ported 243's and the right cam and intake and you have yourself a 7800 rpm screamer.

Great and fun for a light car, not so much for a heavy truck.

But with boost those 4.8's are animals.
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Old 03-30-2016, 07:02 PM   #26
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by the noise of it i should just find a 6L or a ls3, also should i stay away from dod engines. whats better 53 tooth or 24 tooth?

Last edited by skidder07; 03-30-2016 at 07:21 PM.
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Old 03-31-2016, 04:10 AM   #27
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Quote:
Originally Posted by skidder07 View Post
by the noise of it i should just find a 6L or a ls3, also should i stay away from dod engines. whats better 53 tooth or 24 tooth?

The 24x crank is the older system and uses a slightly slower ECM.

The 58X is the current system.

DOD was available on almost all truck motors it can be tuned out or physically removed.

If your using a 24x ECM the DOD has to be physically removed its not compatible.
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Old 04-01-2016, 11:54 AM   #28
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4.8 suuupppeerrr strong fun engine.. Yes notba "huge" HP engine but yeah 400 definitely achievable. I think they are base at 280ish?? Boost it.. For half the price of a Na build.. 8 psi, good tune very streetable 475-500
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Old 04-02-2016, 06:13 PM   #29
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so find a engine with 58 teeth.
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Old 04-02-2016, 09:25 PM   #30
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Quote:
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so find a engine with 58 teeth.
I guess but I've had 2 5.3's both 24 tooth and they run great .. I don't know if there is a real big noticeable difference .. Please someone chime in i would actually like to know ..
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Old 04-03-2016, 02:05 PM   #31
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Quote:
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so find a engine with 58 teeth.
There is no right or wrong.

GM went 58x crank and 4x cam for emissions and better control of spark,cam timing ect.

Build what ever you find cheapest if you blow up a 24X and you want to swap a 58X later Lingenfelter sells an adapter box to change the signal.
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Old 04-10-2016, 06:50 PM   #32
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so i could just use the 4.8/5.3 block put 5.3 rotating assembly in with a 58 teeth adapter.
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Old 04-11-2016, 02:45 PM   #33
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Quote:
Originally Posted by skidder07 View Post
so i could just use the 4.8/5.3 block put 5.3 rotating assembly in with a 58 teeth adapter.

The reluctor wheel is mounted on the crank.

The crank can be used in a 4.8/5.3 the pistons are not interchangeable the 4.8 bore is smaller.

Last edited by transamtom; 04-12-2016 at 07:41 AM. Reason: forgot some stuff.
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Old 04-12-2016, 07:29 AM   #34
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I have a gen 4 4.8 sitting on a stand now if you interested that I robbed the 799s off of.
Super clean. Low k from a 2012. I'll sell it cheap cheap.
I need the engine stand for a buddy
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Old 05-01-2016, 09:03 AM   #35
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I have a 4.8 sitting my shop. That's why I'm asking if it's worth building or should I build a 6L
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