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Penryn
Dodge Dakota
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8/14/2004
18:39:39
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 Subject: Where's the HP bottleneck?
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Where's the HP bottleneck in the 3.9L?
I've heard people say that it's the largest engine / least amount of HP, blah blah..
Anyway, they've got a point.. but where's the bottleneck on the HP? on a stock 3.9L, what do you have to free up?
Compared to other 4.0Ls of the same generation, it's incredibly slow.
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GB2000
GenIII
8/14/2004
18:43:15
|  RE: Where's the HP bottleneck?
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I think the main issue is that Dakotas are very heavy trucks and the engine is just too small to be pulling that kind of weight around.
Josh
http://www.cardomain.com/id/sentenced
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gen1dak
Dodge Dakota
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8/15/2004
00:33:04
| RE: Where's the HP bottleneck?
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The LA 3.9 cam is miniscule, the Magnum cam a bit better, but not great. The Magnum heads are good for around 300HP in stock form on the 3.9. It could definitely be amped up. It's just not a very aggressive setup. Needs better cam and induction for starters....and it is a deceptively heavy truck.
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daffydak
GenIII
8/15/2004
02:54:59
| RE: Where's the HP bottleneck?
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Message:
i agree with the tame stock cam, and the heads. but whats the compression we are working with on the 3.9L? in the low 8 range??
If you put some high compression domed 5.2L pistons in there, that should make a nice difference in power. weight is also a big factor. if you put a 3.9L in a ranger/s10, it would likely be a screamer! not to mention, have better fuel eceonomy :-)
just my .02
Dan
MOPAR=More Power!!
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Penryn
Dodge Dakota
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8/15/2004
03:47:50
| RE: Where's the HP bottleneck?
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Message:
Anyone know the stock weight on the Gen2 daks?
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regcabdak
Dodge Dakota
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8/17/2004
03:32:26
| RE: Where's the HP bottleneck?
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I looked around a little on the web and i am seeing 9.1 compression ratio for the 3.9 v6.
anyone know how high you can go and still use regular unleaded?
Tyler
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um
Dodge Dakota
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8/17/2004
09:51:00
| RE: Where's the HP bottleneck?
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a 3.9 in a s10 would still be slower then a s10 with a 4.3
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J-Man
Dodge Dakota
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8/17/2004
12:13:56
| RE: Where's the HP bottleneck?
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Don't forget that HP isn't everything. Compare the torque numbers, too.
4.0L
180 HP @ 4750
220 ft.lbs @ 4000
3.9L
175 HP @ 4400
225 ft.lbs @ 3200
Not that far off.
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um
Dodge Dakota
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8/17/2004
15:48:31
| RE: Where's the HP bottleneck?
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check out the 4.3's tq
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J-Man
Dodge Dakota
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8/17/2004
16:29:47
| RE: Where's the HP bottleneck?
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I'm just saying that it's unfair to write the 3.9 off as the biggest for the least.
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