Making midrange torque - Performance Forum

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Making midrange torque
Sunday, December 21, 2008 9:10 PM
Since my last post Ive been doing a lot of thinking and have decided I want my power range in my daily driver to be in the mid rpm range. I want somthing a little peppy but not all out performance to the point reliability is an issue. I have an automatic transmission so I am leaning against HO cams, which is my reasoning for the mid rpm range desire. I do not want to buy an after market converter for the DD. I am considering the idea of not building my spare 2.3 and going to the junk yard and getting a 2.4 since it has a longer stroke which is better for torque. Also I recently emailed Crower cams and they quoted me an average of $100 per cam for regrinds.

So for the daily driver my build plans are:

-2.4 bottom end(2.3 oil pump swap)
-456 head with light work done but not enough to loose bottom end(already have it or I would go 086, still better than a 2.4 head)
-Custom reground LO cams(im thinking high lift low duration)
-Lower compression pistons for a final ratio of somewhere between 9.5 and 10-1 compression.
-Im thinking modified OBX intake manifold modified to fit the 2.3 head(longer runners will be better for midrange so I have read)
-Factory style 4-2-1 2.3 tubular exhaust manifold(also supposedly good for midrange) or modified 4-2-1 ecotec header from ebay
-Since im not going for a high rpm motor or monster compression I will most likely keep the factory rods.

I might still do the 2.3 with the same mods as listed above since I already have it. but for $100 I can get a 2.4 bottom end at the pick and pull and think i might be able to see more mid range power with it.

Now I just have to slowly buy the parts. cant wait for tax returns.

Anyone have any input? Or constructive criticism? or maybe even suggestions?






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