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Post by AmunRoo on Nov 6, 2017 15:48:52 GMT -6
OK, there's nothing wrong with my 4.0 but I'm putting away the necessary fundage to pick up a brand new crate 4.6 and I wanted to know what was the best option as far as power is concerned... Vin Y of 9... do swapping heads on either of those two make any difference? are the headers the same across both motors? anything I should know? do 4.6 headers make any difference on the 4.0 or are they the same?
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tigger
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Post by tigger on Nov 6, 2017 17:07:14 GMT -6
Your choice. The VIN 9 has more horsepower, the VIN Y has more torque.
L37 (VIN 9)
300 hp (224 kW) @ 6000 rpm
295 lb·ft (400 N·m) @ 4400 rpm
LD8 (VIN Y)
275 hp (205 kW) @ 5600 rpm
300 lb·ft (407 N·m) @ 4000 rpm
I highly doubt the heads of either would work on the 4.0. But you could swap out the cams...
Like they say, no replacement for displacement.
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Post by AmunRoo on Nov 6, 2017 20:23:54 GMT -6
5ft/lbs seems like a good compromise for 25 go lol
What about headers? Are they that much different?
I guess I'm going vin 9...
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tigger
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Post by tigger on Nov 6, 2017 22:37:50 GMT -6
Well, it depends on when you want to make your power. The Y is a little better on the bottom end, the 9 is a little better at walking things down on the top, lol! Either one will be a nice upgrade over the 250/260 4.0.
Headers?!? Haha, you wish!
But no, there's no difference at all. LD8, L37, and L47(4.0) used the same exhaust manifolds, crossover pipe, and collector from '00-'05.
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Post by lanceslambos on Nov 11, 2017 11:58:31 GMT -6
Vin 9 is the way to go but the Vin 9 exhaust cams are a direct fit into the 4.0 and with a pcm tune will out perform the 4.6 assuming it isn't also pcm tuned! This according to 2009 dyno results (source: North Star Performance, Canada)
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Post by AmunRoo on Nov 23, 2017 23:34:04 GMT -6
What were the dyno numbers?
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Post by scottyaurorav8 on Nov 24, 2017 6:44:13 GMT -6
A crate motor would be very expensive no?
You can get a studded rebuilt vin 9 engine from Northstar Performance way cheaper.
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Post by AmunRoo on Dec 26, 2017 23:26:09 GMT -6
I'm pulling a used motor from the junk yard...
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Post by lanceslambos on Dec 30, 2017 8:46:29 GMT -6
A crate motor would be very expensive no? You can get a studded rebuilt vin 9 engine from Northstar Performance way cheaper. |
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Post by AmunRoo on Jan 5, 2018 4:07:19 GMT -6
Ok, way to make me fudge my huggies... what's going on with NSP?
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RCA1186
Administrator
Rob
Go Pack Go!
Posts: 4,837
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Post by RCA1186 on Jan 5, 2018 9:36:25 GMT -6
A crate motor would be very expensive no? You can get a studded rebuilt vin 9 engine from Northstar Performance way cheaper. You've been warned...don't use NSP. As soon as things get cleared up here I'll be posting all about it. In the meantime, don't consider NSP for anything! Uh-oh. Another problem with NSP? I need to hear about this... |
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Post by AmunRoo on Jan 11, 2018 14:50:56 GMT -6
Where can I buy a VIN 9 new crate motor that I can just drop in?
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tigger
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Post by tigger on Jan 11, 2018 22:45:17 GMT -6
New? I think GM still sells them...
Wouldn't you feel better about a studded reman? Or better yet, rebuilding and studding one yourself?
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Post by lanceslambos on Jan 21, 2018 7:53:22 GMT -6
Where can I buy a VIN 9 new crate motor that I can just drop in? I'm going with Accurate Engines Accurate |
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