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| turbotim23 | Is the GMPP 845 cam too much for a street driven corvette? | ||
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Guru Newb
 
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Hi I have a cam left over from anther car. It's a Gm 845 also have lifters and 1:6 roller rockers,and Exotic muscle long tube headers. thinking of mildly porting factory lt1 alum heads adding 373 gears and 3000 torque converter. my car is mostly a street car with some small amount of drag racing and autocross. How will this cam be on the street? To high a rpm for street? Thanks Tim
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Posted on: 2010/2/17 20:49
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| vetteoz | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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GMPP # 845 214/222 .520/.543 (w/1.6) 112
Pretty mild , not even as big as the popular Hot cam 218/228 .525 (w/1.6) 112 With 3.7's and 3K+ stall ( or manual ) the F-Body guys are running the GMPP # 847 in LT1's 234/242 .539/.558 (w/1.5 ) 112 |
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Posted on: 2010/2/17 22:13
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| turbotim23 | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Well I'm going to have to look at the cam again. Bought it years ago and haven't looked at in a long time.I wanted a wilder cam than the hot cam at the time.I wanted some lope to it. I'm wondering it might be the GMPP 846 instead of the 845? What are the specs to that cam? I might be better off with the hot cam for the street but I have this one free now.Also if I used my 1:6 rockers with the hotcam, wouldn't that make the lift at valve closer to the 846's lift anyways? thanks Tim
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Posted on: 2010/2/17 23:56
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| Matatk | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Hotcam is 219/228, 112 LSA and .525/.525 with 1.6 rrs.
Matthew |
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Posted on: 2010/2/18 2:16
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| vetteoz | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Quote:
GMPP # 846 222/230 .509/.538 w/1.5's 112 |
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Posted on: 2010/2/18 13:03
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| turbotim23 | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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I'm sure it's the 846 cam now but after looking at it it has the pin on cam end for optispark hookup not the splined end I need for the 93 vette. It might have been too much for a street car anyway. Thanks for your help Tim
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Posted on: 2010/2/19 0:27
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| rklessdriver | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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The spline drive for the early style Opti is in the upper timing chain gear.
Any "small nose" cam can be used. The GM 846 (or 845) will run fine in a street car with a proper tune. Will |
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Posted on: 2010/2/19 0:52
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| turbotim23 | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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thanks I thought the newer ones had splines.I bought a used probillet MSD optispark w /splined end, thinking that it was what it needed.I think I was told the 93 was crossover year though and might have either type of end. that you had to look. How big is the nose on a small nosed lt1 cam?
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Posted on: 2010/2/19 19:45
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| rklessdriver | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Quote:
All factory SBC hyd rollers (1986 and up) are the same "small nose" or "step nose" to include the GEN II LTX series. They are all the same size. The only difference is the length of the dowl pin and the center hole on factory GENII LTX's built after after 1994 (pin drive opti). The Corvette didn't change to the pin drive opti until 1995. Some Impala and Buick Roadmasters changed in 1994... Your 93 uses the spline drive - so no worries you do have the correct MSD opti.... unless a previous owner changed it over. Will |
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Posted on: 2010/2/19 22:49
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| Aboatguy | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Senior Guru
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IMO GM 846 CAM would not be too much for a daily driven C4 with supporting mods and a good tune.....however, I'd go bigger, actually I went bigger on my DD. Mike |
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Posted on: 2010/2/20 0:01
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| turbotim23 | Re: Is the GMPP 845 cam too much for a street driven corvette? | ||
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Thanks that cleared that up. I bought the cam for a 94 caprice 9c1 [same as Impala ss]that I was going to drag race. That's part of reason I was confused on ends.I'm sure the cam end is the newer pin drive type. OH well I have a good used stock optispark of that newer pin drive type if I wanted to use the cam to my corvette. Thanks again Tim
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Posted on: 2010/2/24 0:31
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