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Post by turbotbird87 on Jan 17, 2009 16:08:34 GMT -5
i have a pretty much stock 87 turbo coupe. i'm lookin to make my car street driveable and also fast off the line. i want low end acceleration. so what is the best cam to use for this application? i did a lot of research into what changing the variables does (lift, duration, lobe spread, etc) and still having a hard time coming up with a good answer. it seems like its largely dependent on the engine, so this seems like a good place to ask. any input would be great, thanks.
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Post by Stinger on Jan 18, 2009 0:20:33 GMT -5
Ultimately, if you want low end torque/acceleration (meaning power under 2500 rpm) you better find a different car/engine. This isn't a big block, 2.3's don't make power until the turbo is fully spooled, no matter the cam.
With that being said, a Ranger roller cam will have more low end than stock, and some of the stage 1-1.5 cams from Boport have more low end than the Ranger roller. It's still not going to have any significant acceleration until after 2500-3000rpm though, it's only 140 cubic inches.
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Post by turbotbird87 on Jan 18, 2009 16:21:28 GMT -5
i'm aware of the limitations of a small turbo engine, i meant getting the best low end acceleration i can out of this engine. i'm lookin at the 1.5 cam from boport and thats seeming like the best bet so far. i was just hoping someone may have experimented with changing the various cam variables independently to see the gains in different ranges. i found a site where someone did that with a chevy small block, but the effects would be at least slightly different in this engine. i guess i'll try the 1.5 and if i don't like it i'll try another and post my results for the benefit of others. i've got two of these engines in good shape to play with, so i should be able to get some decent experimental results. thanks anyway.
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Post by Matt Culpepper 2300gearjammer on Jan 18, 2009 17:14:56 GMT -5
If you are trying to leave yourself a little room to grow pick-up the Boport 1.9 instead. I think thats what I'm going to do with my daily driver
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Post by turbotbird87 on Jan 18, 2009 18:02:18 GMT -5
well the 1.9 said that it was not recommended for a daily driver, and its rpm range was 4000 to 7000. might be a little more than i want. i wish he would list the lift, duration and lobe spread on the site, but i guess i understand why he doesnt want to. it would be great to compare those two cams' specs and maybe try something in between. i live in buffalo ny and i'm not swappin a cam in 10 degree weather, so i've got a few months before i have to really make a decision. i guess i'll just keep researching and getting recommendations. thanks for yours.
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Post by Matt Culpepper 2300gearjammer on Jan 18, 2009 19:16:47 GMT -5
Im running a cam a little bigger than the Stage 3 on the street everyday now. I rode in/raced against a car with a 1.9 it idled and drove like stock and pulled like mad. It has definitely made me want one. If I beat you to it I'll let you know how it drives
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Post by Stinger on Jan 19, 2009 15:52:06 GMT -5
i found a site where someone did that with a chevy small block, but the effects would be at least slightly different in this engine. The same cam principles apply to all engines. More/less duration, lift, etc. does the same thing to the power production regardless of the engine type. The only difference for our engines is being turbocharged changes "ideal" specs to some degree. |
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