New shift points for LT1 cam
06-15-2004, 01:15 AM
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Car: 94 Z28, 92 s10 Jimmy 350 CID TBI soon to be Vortec TBI, 76 Pontiac Ventura LO3/4L60
Engine: Mega HP!
Transmission: 4L60
New shift points for LT1 cam
I put a Lt1 cam into my 1992 LO3 engine. I am going to change the shift points of the 4L60 now with the weights and springs in the governor now. The car has the cam, full duals-no cats, custom chip for the cam, underdrive pullys, 3.42 gears. So what is a good shift point for this combo and what is the max RPM the stock LO3 springs are good for with a LT1 cam?
Check out my Ventura web Page:
http://www.geocities.com/rodmc66/ven...?1075593875593
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-Rod-
Check out my Ventura web Page:
http://www.geocities.com/rodmc66/ven...?1075593875593
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-Rod-
06-20-2004, 12:09 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
I would not wind that motor to high with the stock springs. Why not just save some money and shift the tranny maually. That way you can find the best shift point by varying it when you are at the track. A quick dyno run will tell you exactly where you should shift. With the proper springs you can take an LO3 to 6300 rpm if you want.
06-20-2004, 10:45 PM
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Car: 94 Z28, 92 s10 Jimmy 350 CID TBI soon to be Vortec TBI, 76 Pontiac Ventura LO3/4L60
Engine: Mega HP!
Transmission: 4L60
Ok you think 5000 RPM is a safe place to start? Shifts at 4000 stock. -Rod-
06-21-2004, 08:40 AM
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Car: 96 s-10, and 89 camaro RS
Engine: 305 TBI with alot of mods
Transmission: 700R4 B&M shift kit
I have the LT-1 cam in my 89 and i let the trans shift at WOT 5,000 prm by itself and it went a 15.4. THEN i shifted it manually at 5,500 and it ran a 15.2. So i dropped 2 tenths for the extra 200 rpm in the powerband. Im too afraid to go any further in the ol' L03.
06-21-2004, 08:43 AM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by 94zcar
Ok you think 5000 RPM is a safe place to start? Shifts at 4000 stock. -Rod-
Ok you think 5000 RPM is a safe place to start? Shifts at 4000 stock. -Rod-
06-22-2004, 01:48 AM
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Car: 94 Z28, 92 s10 Jimmy 350 CID TBI soon to be Vortec TBI, 76 Pontiac Ventura LO3/4L60
Engine: Mega HP!
Transmission: 4L60
Yea, my "TV" was not adjusted when I first swapped in the engine and trans. I have it adjusted now so it shifts hard at full throttle. Still only getting 4000 RPM out of it. I don't have a tach in the Car(76 Pontiac Ventura). I found out the RPM by using the "Dash" feature in Winaldl. Do you think that is accurate? Thanks for the replies. -Rod-
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