Ls4????
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Joined: Dec 2005
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From: CT
hmmm... not sure about that, since I know the ls4 block is shorter than the regular 5.3 truck motors... and being mounted differently/sideways, I'm pretty sure the mounts would be different...
EDIT: I just looked up the mounts for our ls4 and the 5.3 vortecs... they are totally different mounts/layouts...
LS4 Mounts:
other/regular 5.3L mounts:
EDIT: I just looked up the mounts for our ls4 and the 5.3 vortecs... they are totally different mounts/layouts...
LS4 Mounts:
other/regular 5.3L mounts:
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
Last edited by 06MonteSS; Dec 14, 2011 at 03:58 PM.
LS1Tech Sponsor
Joined: Dec 2005
Posts: 2,932
Likes: 12
From: CT
aaah, ok... I thought the block itself was a little shorter too....
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
The LS4 block is about 1/8" LONGER than the RWD blocks, the crankshaft is 10mm shorter (3mm at flywheel, 10mm at balancer), the mounting locations on the side of the block are the same (even though the LS4 uses a different type of mounts and doesn't use the side mounts for anything but supporting the snout of the transmission, but I am not sure that every bolt boss is there between the RWD and LS4 setups. Here are the side profile pics from my LS4:
There is no starter mounting provisions on the LS4 block.
There is nothing keeping someone from using an LS4 in a longitudinal configuration with the 2.8 S10 or 3.1/3800 Camaro bellhousing (or a custom adapter plate) and a bolt-on tranny mounted starter bracket like this one (or using a transmission that already has a starter provision - like most porsche transmissions):
Last edited by fieroguru; Dec 14, 2011 at 05:12 PM.
I replied to your other thread in FI.
The LS4 block is about 1/8" LONGER than the RWD blocks, the crankshaft is 10mm shorter (3mm at flywheel, 10mm at balancer), the mounting locations on the side of the block are the same (even though the LS4 uses a different type of mounts and doesn't use the side mounts for anything but supporting the snout of the transmission, but I am not sure that every bolt boss is there between the RWD and LS4 setups. There is no starter mounting provisions on the LS4 block.
There is nothing keeping someone from using an LS4 in a longitudinal configuration with the S10 bellhousing (or a custom adapter plate) and a bolt-on tranny mounted starter bracket like this one (or using a transmission that already has a starter provision - like most porsche transmissions):
The LS4 block is about 1/8" LONGER than the RWD blocks, the crankshaft is 10mm shorter (3mm at flywheel, 10mm at balancer), the mounting locations on the side of the block are the same (even though the LS4 uses a different type of mounts and doesn't use the side mounts for anything but supporting the snout of the transmission, but I am not sure that every bolt boss is there between the RWD and LS4 setups. There is no starter mounting provisions on the LS4 block.
There is nothing keeping someone from using an LS4 in a longitudinal configuration with the S10 bellhousing (or a custom adapter plate) and a bolt-on tranny mounted starter bracket like this one (or using a transmission that already has a starter provision - like most porsche transmissions):
"but I am not sure that every bolt boss is there between the RWD and LS4 setups"
This is the only thing I need to figure out...
Can anybody else shed some light on this????
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Verdad Gallardo If the lower side engine mount bosses are the same, then all the bolts on the front of the block are the same as well.
The rear bellhousing area uses the GM Metric bellhousing pattern and does not have the SBC pattern even drilled (though the dowel pin locations are present for lining up a SBC porsche adapter). If you look close, the block is shorter at the bottom right (to clear the transmission) and the lowest SBC bolt location is completely missing in this area.
The rear bellhousing area uses the GM Metric bellhousing pattern and does not have the SBC pattern even drilled (though the dowel pin locations are present for lining up a SBC porsche adapter). If you look close, the block is shorter at the bottom right (to clear the transmission) and the lowest SBC bolt location is completely missing in this area.
If the lower side engine mount bosses are the same, then all the bolts on the front of the block are the same as well.
The rear bellhousing area uses the GM Metric bellhousing pattern and does not have the SBC pattern even drilled (though the dowel pin locations are present for lining up a SBC porsche adapter). If you look close, the block is shorter at the bottom right (to clear the transmission) and the lowest SBC bolt location is completely missing in this area.
The rear bellhousing area uses the GM Metric bellhousing pattern and does not have the SBC pattern even drilled (though the dowel pin locations are present for lining up a SBC porsche adapter). If you look close, the block is shorter at the bottom right (to clear the transmission) and the lowest SBC bolt location is completely missing in this area.
Cause the LS1 is the same bellhousing pattern as a SBC
So if the LS1 adapter wont work I would have to have him do I custom one...Which he does....GREAT INFO MAN!!!!!
So Ls4 heads are the same as 243 castings???
LS4 uses the 243/799 castings (mine has the 799 - 2007 engine).
The LS4 bolt pattern is the same as the 2.8, 3.1, 3.4, 3.4TDC, 3800, and 4.1/4.5/4.9 caddy. Your adapter plate guy might have already adapted a porsche transmission to one of these engines. The N*/Aurora engines have 1 bolt hole offset about 1" (lower right bolt in the pic) to clear the larger 4T80 transmission, but everything else is the same.
The LS4 bolt pattern is the same as the 2.8, 3.1, 3.4, 3.4TDC, 3800, and 4.1/4.5/4.9 caddy. Your adapter plate guy might have already adapted a porsche transmission to one of these engines. The N*/Aurora engines have 1 bolt hole offset about 1" (lower right bolt in the pic) to clear the larger 4T80 transmission, but everything else is the same.
LS4 uses the 243/799 castings (mine has the 799 - 2007 engine).
The LS4 bolt pattern is the same as the 2.8, 3.1, 3.4, 3.4TDC, 3800, and 4.1/4.5/4.9 caddy. Your adapter plate guy might have already adapted a porsche transmission to one of these engines. The N*/Aurora engines have 1 bolt hole offset about 1" (lower right bolt in the pic) to clear the larger 4T80 transmission, but everything else is the same.
The LS4 bolt pattern is the same as the 2.8, 3.1, 3.4, 3.4TDC, 3800, and 4.1/4.5/4.9 caddy. Your adapter plate guy might have already adapted a porsche transmission to one of these engines. The N*/Aurora engines have 1 bolt hole offset about 1" (lower right bolt in the pic) to clear the larger 4T80 transmission, but everything else is the same.
UHOH
I think my i dea may be dead in the water... Look what somebody just linked me too
"Beertestr03-02-2011, 10:05 AMWhy buy a front wheel drive 5.3 and go through the headache of making it work? Just buy the truck version that has Active fuel management and is known to fit.
x2
4 major issues you won't easily get around.
1- Aforementioned BOP bellhousing pattern
2 - no block mounted starter. FWD V8 runs a starter off the trans bellhousing.
3 - Shorter snout crank. If you want to change accessories you will have a hard time coming up with a balancer that will work.
4 - No engine mounting bosses on the RH side like other LS motors. The whole right side of the block is different to provide clearance to the wrap around 4T65E trans.
Yes, you can change the oilpan, yes you can change the intake. But the $$ will not add up over finding an iron or Al 5.3L out of a truck and dropping it in. Save the FWD V8's for the guys doing Fiero V8 conversions.
You want me to keep going?"
fieroguru
Can u translate this for me or confirm #4 for me. Dam I had so much hope.
Last edited by gn4life; Dec 14, 2011 at 06:00 PM.
Based on comparing these two pics, I would say that 3 of the side engine mount bosses are present on the LS4 vs. the LS1
LS1 - looks like there are 5 bolt bosses for the side engine mount:
LS4 - looks like there are only the front 3:
Whether this is a deal breaker depends on what type mounts you were going to use. The Vette mounts use the front 4 bolts, so the RH side would be missing the lower rear. Some other mounts use the back 4 which would be a significant issue.
LS1 - looks like there are 5 bolt bosses for the side engine mount:
LS4 - looks like there are only the front 3:
Whether this is a deal breaker depends on what type mounts you were going to use. The Vette mounts use the front 4 bolts, so the RH side would be missing the lower rear. Some other mounts use the back 4 which would be a significant issue.
Based on comparing these two pics, I would say that 3 of the side engine mount bosses are present on the LS4 vs. the LS1
LS1 - looks like there are 5 bolt bosses for the side engine mount:
LS4 - looks like there are only the front 3:
Whether this is a deal breaker depends on what type mounts you were going to use. The Vette mounts use the front 4 bolts, so the RH side would be missing the lower rear. Some other mounts use the back 4 which would be a significant issue.
LS1 - looks like there are 5 bolt bosses for the side engine mount:
LS4 - looks like there are only the front 3:
Whether this is a deal breaker depends on what type mounts you were going to use. The Vette mounts use the front 4 bolts, so the RH side would be missing the lower rear. Some other mounts use the back 4 which would be a significant issue.
I think this may be alot easier
LM4
The LM4 (VIN code "P") Vortec 5300 is an aluminum block version of the LM7, and had a short production life.
LM4 applications:
2003–2004 Chevrolet_TrailBlazer EXT
2003–2004 Isuzu_Ascender
2004 GMC_Envoy XL
2003–2004 Chevrolet_SSR
2004 Buick_Rainier\
I wonder about the heads on this motor...I am sure they wont be as good as the 243 castings on the LS4????
But this one should bolt right up motor mount wise right???
