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-   -   swimming in a sea of choices.. (engine choices) (https://67-72chevytrucks.com/vboard/showthread.php?t=310403)

Gray Ghost 10-14-2008 11:14 PM
Re: swimming in a sea of choices.. (engine choices)
 
Quote:
Originally Posted by skchevota (Post 2930360)
Having built many th350s and th400s, the 400s are wayyyyyyyyy stronger.
the gears, clutches, sprags, eveything is biger. They came behind 450hp big blocks, in moter omes, dump trucks, you name it. With aftermarket parts they will suport what ever kind of hp you make. The down fall of the TH 400 is the 1st gear ratio is 2.48 to 1, the 700 r4 is 3.06 to 1. tis is like going from a 3.08 rear end to 3.73s off the line.
Yep....and the other drawback is the 400 takes a bunch more hp outta the mix than a 350.

gintaras 10-15-2008 03:20 PM
Re: swimming in a sea of choices.. (engine choices)
 
so, I am pretty set on a 5.3/4L60E combo from SPS, sounds a killer deal at right around $5k

But has anyone installed an LS1 or an LS2? a 400hp LS2 would be just about perfect, and they have one available with a GTO 6-speed for $8k!!! (but alas, i think the 6-speed might be a real PIA and I dont want to cut up the truck anyway.

boostat4500 10-15-2008 03:37 PM
Re: swimming in a sea of choices.. (engine choices)
 
Is the SPS all brand new parts? If not, you can do much better price wise. A used 5.3 and 4l60e can be had for under $1500 complete. Then depending on what else is needed, if anything, your looking at about $100 for a programmed PCM and about $3-500 for a ready to go harness if the motor didn't come with one. The 6.0's can be had for about the same, throw a small cam in and your at 400hp easy.

Gray Ghost 10-15-2008 03:47 PM
Re: swimming in a sea of choices.. (engine choices)
 
Quote:
Originally Posted by gintaras (Post 2931434)
so, I am pretty set on a 5.3/4L60E combo from SPS, sounds a killer deal at right around $5k

But has anyone installed an LS1 or an LS2? a 400hp LS2 would be just about perfect, and they have one available with a GTO 6-speed for $8k!!! (but alas, i think the 6-speed might be a real PIA and I dont want to cut up the truck anyway.
That's a great choice....you will love the driveability no doubt. Sometimes I wish I had gone that route with mine....maybe next time.

brad_man_72 10-15-2008 03:54 PM
Re: swimming in a sea of choices.. (engine choices)
 
working in a driveline shop, alot of the hotrod ls/manual trans guys are having trans problems, and have you ever put a cluch in one you wouldnt mind an auto, they seem to last quite a bit longer. no shock load, but not as much fun.

gintaras 10-15-2008 04:12 PM
Re: swimming in a sea of choices.. (engine choices)
 
Quote:
Originally Posted by boostat4500 (Post 2931453)
Is the SPS all brand new parts? If not, you can do much better price wise. A used 5.3 and 4l60e can be had for under $1500 complete. Then depending on what else is needed, if anything, your looking at about $100 for a programmed PCM and about $3-500 for a ready to go harness if the motor didn't come with one. The 6.0's can be had for about the same, throw a small cam in and your at 400hp easy.
sounds real good, but from where? wrecking yards, I assume?

boostat4500 10-15-2008 09:15 PM
Re: swimming in a sea of choices.. (engine choices)
 
Either the wrecking yard or just watch Craigslist for even better deals. I paid $1800 for my 6.0L/4L80e/NP-241 combo complete with everthing. I just picked up another complete ( minus harness and pcm ) 6.0L a few months ago for $500 and a 4L60E for $400, there going in a 57' Nash Metropolitan for my wife.

brad man 72: what are your customers doing to there T-56's to break them? What problems are you seeing? A few years I was heavily into drag racing with an 01' WS6 making 750hp. Daily driven with nothing upgraded tranny wise but the clutch. All my buddies with 4L60E's were constantly breaking with much less power. Just curious...

71/454 10-16-2008 01:32 AM
Re: swimming in a sea of choices.. (engine choices)
 
Nothing says street and strip better than a twin turbo!


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