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| matts85vet | who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Guru
 
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i will be going from 2.73 to 3.75 gears with my miniram, auto combo. the cam is a cc 280xfi hyd roller. i usually shift it @6k. it's a d/d w/ some hwy use but mostly city driving.
just curious how it worked out for others who have it. any comments are appreciated |
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Posted on: 2010/9/2 16:45
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85 coupe, 383, TPIS Miniram, auto 700R4, 3.75 gears, afr 180 eliminator heads 58cc, 12:1 compression ratio, comp cams 280XFI hydraulic roller cam, 1.65 roller rockers, 52mm throttle body, c5 calipers, hedman elite longtube headers, pypes dual exhaust w/x- |
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| Matatk | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Webmaster
 
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Welcome to the site!
What else is done to the motor? My engine builder wanted me to go to 3.54s, but I currently have 3.07s. Mine is a street car as opposed to a drag racer. Some guys run out of steam with the bigger ratio gears, but if you shift at 6k you shouldn't have a problem. You will definitely lose some mpg if that matters to you, but off the line will be a huge difference. I noticed a big difference going from 2.59s to 3.07s. Matthew |
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Posted on: 2010/9/2 17:03
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| matts85vet | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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thanks for the response!
the engine has: 350 cubic in. cut air lid k/n filter 52mm throttle body miniram 1204 port size afr eliminator heads 180cc port, 58cc chamber 1.65 ratio roller rockers compcams 280xfi hyd roller cam 230/236@.05 113lsa total lift=.596/.591 thats all i can remember for now mileage is not that important i have been driving in D (3rd) on the freeway, to simulate the lower gear. it didn't seem to make that much difference at least in the instant mpg reading the cam/miniram combo seems to come alive around 2500-3000rpms i thought the gears might help a little around town |
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Posted on: 2010/9/2 18:10
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| bogus | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Grand Imperial Pooh-Bah
 
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It will make a difference...
However, if the car is a race focused car, who cares. The gear will really wake up that intake head combo. You will have to do something with the exhaust... |
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Posted on: 2010/9/2 18:53
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| Vetron87 | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Elite Guru
 
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52mm throttle body what make?
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Posted on: 2010/9/3 0:31
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Bone stock 87 conv. |
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| matts85vet | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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throttle body is a reconditioned stock bored to 52mm
exhaust has been changed as well -- hedman elite long tube headers with pypes 2 1/2" true dual with x pipe, no cats should have filled out my signature earlier |
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Posted on: 2010/9/3 1:23
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| bogus | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Grand Imperial Pooh-Bah
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you may want to consider cats... they clean the air up, don't cost a lot in power loss, but will help by adding torque.
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Posted on: 2010/9/3 3:08
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| cuisinartvette | Re: who has 3.75 gears, auto, and a miniram/lt1 and how do you like it? | ||
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Elite Guru
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Youll want to match the miniram to a 1256 like AFR recommends and be conservative on it as the head entry has vertical walls that taper in some and more rounded corners than an intake will typically have. . A 1205 isnt too far off either.
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Posted on: 2010/9/3 3:52
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