turbo 5.3 numbers???
07-28-2009, 08:16 PM
#21
Decided on the 5.3!!!! have a few questions though and i want to keep this as budget as possible!
1)Should i get 317 heads or just use my 241's
2)Should i get an ls6 cam or reuse my 227/231 614 617 112+2
3) Do i really need ARP Head/Rod bolts?
4) How much boost should i be looking to run with my FMIC no meth?
If i reuse everything off the ls1 i could do the 5.3L for $600!
Thanks!
Blaine
1)Should i get 317 heads or just use my 241's
2)Should i get an ls6 cam or reuse my 227/231 614 617 112+2
3) Do i really need ARP Head/Rod bolts?
4) How much boost should i be looking to run with my FMIC no meth?
If i reuse everything off the ls1 i could do the 5.3L for $600!
Thanks!
Blaine
2. Id sell it and get an LS6 cam
3. I dont have any of that stuff mines held up.
4. I run 15psi and no probs. Havnt tried more. except the 50 shot of spray occasionally....ok quite often.
08-06-2009, 12:51 PM
#22
That's a hell of a setup you've got there pwrtrip. I'm doing a conversion into a 67 bird with a TH400 and 9" set up for drag and got a 5.3 with low miles complete for $500 with harness and everything. I have all the parts to build a 408 but didn't want to torch that poor motor since it cost so much to build (JE pistons, lunati billet rods, etc) so I picked up the 5.3 to hot rod around. I'm gonna keep this sucker as stock as possible because I already have the "race" motor setup but if I can get away with the 5.3 while working the bugs out of the car that's what I'm going to do and save the 408 for when I want to get dangerous with the twin T70's.
I have a stock set of 317's I pulled off the block I'm using for my 408 so I'm debating putting those on, but not sure on the cam since I have my comp cam for the 408. Worth going to a z06 cam honestly? I ALMOST got one for my ls1 when I had my TA (rear mount mp T70 @ 8psi). I have a big intercooler with 3" in/out (31x12x4") I'll be using, would rather not spray meth but 15psi would be hilarious, even if it did grenade it'd still be worth the $500 invested, lol. Great build, will subscribe to this one!
I have a stock set of 317's I pulled off the block I'm using for my 408 so I'm debating putting those on, but not sure on the cam since I have my comp cam for the 408. Worth going to a z06 cam honestly? I ALMOST got one for my ls1 when I had my TA (rear mount mp T70 @ 8psi). I have a big intercooler with 3" in/out (31x12x4") I'll be using, would rather not spray meth but 15psi would be hilarious, even if it did grenade it'd still be worth the $500 invested, lol. Great build, will subscribe to this one!
08-06-2009, 01:57 PM
#23
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Hmmm....so for FI the LM7 is a better choice than the LS1? I have access to a LM7 for under $500, can they (the block) take up to 20 PSI? How fast the they spin (i've heard 8-8.5k) ? what about the bottom end? do i need to forge her out?
08-06-2009, 02:00 PM
#24
Same stroke as ls1 so I wouldn't spin them to 8,500. The block is better for boost since it's iron, obviously weighs more, but can be bored to ls1 specs. The LM7 looks to be a promising, budget builder! 6.0 heads to knock the comp down, a different cam and a decent turbo and you're hauling!
08-08-2009, 09:01 PM
#28
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Anyone know what the more "desirable" year model of the lm7 is the best one to work with? I thought I read somewhere the 03+ models had some upgraded internals, dont know if there is any truth to that
10-12-2009, 03:09 PM
#31
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I just snatched up a 5.3 pullout from katech for 400 bucks!
Im gonna toss it in my notchback with some 317 heads and see what itll do with a turbo, prob gonna do rod bolts though just to be safe. My plan is to see how much fuel economy i can squeeze out of it as well as power, I wanna run E85 too. Should be a pretty fun lil toy to mess with for this winter and next year. Then just build myself a mean LSX block on the side and take my time with it. Downtime sucks!!!
Im gonna toss it in my notchback with some 317 heads and see what itll do with a turbo, prob gonna do rod bolts though just to be safe. My plan is to see how much fuel economy i can squeeze out of it as well as power, I wanna run E85 too. Should be a pretty fun lil toy to mess with for this winter and next year. Then just build myself a mean LSX block on the side and take my time with it. Downtime sucks!!!
10-12-2009, 06:14 PM
#33
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The turbo van is a 2004 5.3. According to the weight and mph its averaging around 570 whp for the pass. Probably peaks a little higher. Tried to dyno it but its too big. It has 317 heads, arp studs, z06 cam, 72 mm turbo on a 10 psi spring. It actually makes 14 psi on meth (50-50_)
Shifts at 5860 last time out.
Shifts at 5860 last time out.
10-13-2009, 03:29 PM
#34
for a true budget build, it makes sense to leave the stock cam in place.
thr stock cam was designed to power heavy vehicles that move/pull weight.
i have a 4.8 that i would like to use to pump some serious psi. 20+ if possible thru stock bottom end and oe heads.
i would like to keep the bottom as oe as possible, even the rod bolts.
the motor i have is a low miles, like new 08 version with the better, rods and bolts,pistons and rings 58x.
thr stock cam was designed to power heavy vehicles that move/pull weight.
i have a 4.8 that i would like to use to pump some serious psi. 20+ if possible thru stock bottom end and oe heads.
i would like to keep the bottom as oe as possible, even the rod bolts.
the motor i have is a low miles, like new 08 version with the better, rods and bolts,pistons and rings 58x.
10-22-2009, 10:10 PM
#37
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Well i put down 528HP and 491TQ on 14psi, 11.5afr, 22*
BUT the darn car pulls HARD to 5500-5600 then drops to NOTHING! It woud put down ALOT better numbers if it would pull past 5500rpm....
Also on the dyno graph the tq and hp stay almost the same instead of the tq slowly dropping when they cross.... kind of crazy! Never seen a dyno graph like this..... not sure what is wrong.
Springs are good, plugs are tr8's, no KR, not sure what the problem is!!!!!!
ANY ideas??????
http://s721.photobucket.com/albums/w...dynoday014.flv
BUT the darn car pulls HARD to 5500-5600 then drops to NOTHING! It woud put down ALOT better numbers if it would pull past 5500rpm....
Also on the dyno graph the tq and hp stay almost the same instead of the tq slowly dropping when they cross.... kind of crazy! Never seen a dyno graph like this..... not sure what is wrong.
Springs are good, plugs are tr8's, no KR, not sure what the problem is!!!!!!
ANY ideas??????
http://s721.photobucket.com/albums/w...dynoday014.flv
Last edited by 1BAD_LS1; 10-22-2009 at 10:19 PM.
10-22-2009, 10:23 PM
#38
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The real question is what trans and rear gear. The 528 number sounds about right. It should make 300 na so 14 psi should be just under 600 depending on turbo, intercooler, temp, etc.
The real questionis why the drop? What injectors? pump? fp? Is pressure dropping?
So far the turbo van with a z06 cam lseems to like being shifted at about 5800. A lot lower then I thought.
The real questionis why the drop? What injectors? pump? fp? Is pressure dropping?
So far the turbo van with a z06 cam lseems to like being shifted at about 5800. A lot lower then I thought.
10-22-2009, 11:33 PM
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The real question is what trans and rear gear. The 528 number sounds about right. It should make 300 na so 14 psi should be just under 600 depending on turbo, intercooler, temp, etc.
The real questionis why the drop? What injectors? pump? fp? Is pressure dropping?
So far the turbo van with a z06 cam lseems to like being shifted at about 5800. A lot lower then I thought.
The real questionis why the drop? What injectors? pump? fp? Is pressure dropping?
So far the turbo van with a z06 cam lseems to like being shifted at about 5800. A lot lower then I thought.
60lb injectors, walbro pump single right now but i have a second one to install this weekend, havent monitored FP on a run but the afr seems to hold steady and not go lean or anything....