Cam lope question.... reverse split!
Cam lope question.... reverse split! Well after hearing many cammed cars and watching many videos I have a simple question. I saw a vid of an MTI cam, specs 230/227 .591/.571 112. Anyways, in this vid, the lope to the car seems dramatically more noticeable than I was expecting from a cam of that size. It also seems as if the chop is much quicker compared to a normal pattern cam..... is this quick chop from the reverse split or something else? Finally, is a reverse split cam a good solution for someone who wants a driveable cam, but also wants that noticeable lope that a big cam gives? I bet that MTI cam is very driveable for its size, but it sounds beefy as hell! Heres the vid. Let me know if I am on the right track here or completely off. Thanks!http://www.youtube.com/watch?v=0IRLVR9lMmA
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TECH Senior Member
Joined: Mar 2004
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From: BFE
IIRC the R1 is not a reverse, the X1 is.
A reverse with the proper valve events will be easier to tune and although with a nice amount of overlap it will not have the symptoms of bigger traditional splits at idle. This has to do with reversion from exhaust gases.
If you are interested in a good performing split grind, PM me I can suggest some specs that will deliver great below curve trq and still carry that power nicely on top. All of this while remaining very DD friendly.
One thing though, do not choose a cam for the way it sounds, choose it for the way it performs.
A reverse with the proper valve events will be easier to tune and although with a nice amount of overlap it will not have the symptoms of bigger traditional splits at idle. This has to do with reversion from exhaust gases.
If you are interested in a good performing split grind, PM me I can suggest some specs that will deliver great below curve trq and still carry that power nicely on top. All of this while remaining very DD friendly.
One thing though, do not choose a cam for the way it sounds, choose it for the way it performs.
i have a reverse split thunder racing 230/224 cam on a 111. it has a good lope to it. kinda like a skipping lope. its drives really good. i made 406 rwhp too with only slp lid,s3 tb,pacesetter lt ory, slp dual dual cb, and dynotuned with hp tuners in my 2002 ws6 m6. im still on the stock 10bolt with 3.42 gears
weird, the title says R1 but in the comments he states the specs as the X1 reverse split.
Is it the reverse split that gives it the quicker chop or something unrelated to being reverse split?
Is it the reverse split that gives it the quicker chop or something unrelated to being reverse split?
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On The Tree
Joined: Dec 2005
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From: Southern California
Cam overlap would give you the lope.
Overlap=((Intake duration + Exhust Duration)-LSA)*2, you can make a smaller cam lope like a big one without having to affect your under the curve power and driveability. i have a single pattern cam from TSP (228/228 112lsa), that lopes really good, you wouldn't believe the overlap is only 4*, and she drives almost like if she was stock.
Overlap=((Intake duration + Exhust Duration)-LSA)*2, you can make a smaller cam lope like a big one without having to affect your under the curve power and driveability. i have a single pattern cam from TSP (228/228 112lsa), that lopes really good, you wouldn't believe the overlap is only 4*, and she drives almost like if she was stock.
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On The Tree
Joined: Dec 2005
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From: Southern California
And this is how a TSP 228R sounds at idle with a little tuning 
she starts with the factory GM idle speed, then as she warms up, you can tell how the lope comes alive, great power everywhere, and excellent driveability, even idling like that. i can make the car move forward with just the clutch like a stock cammed car.
http://www.youtube.com/watch?v=EhiW1kfhAug
she starts with the factory GM idle speed, then as she warms up, you can tell how the lope comes alive, great power everywhere, and excellent driveability, even idling like that. i can make the car move forward with just the clutch like a stock cammed car.
http://www.youtube.com/watch?v=EhiW1kfhAug
TECH Senior Member
Joined: Mar 2004
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From: BFE
Here is a sample of a properly balanced RS cam combo:230/228 .612/.588 110-1LSA
First graph is cam only C5 (853heads, M6, basic bolt ons)
Second graph is same car with addition of good heads (Cartek 4X) and 90/90
Look at the Trq below curve on 2nd graph 400lbs at 3.5K rpm (yes it is a 346cid
)
First graph is cam only C5 (853heads, M6, basic bolt ons)
Second graph is same car with addition of good heads (Cartek 4X) and 90/90
Look at the Trq below curve on 2nd graph 400lbs at 3.5K rpm (yes it is a 346cid
) 
Here is a sample of a properly balanced RS cam combo:230/228 .612/.588 110-1LSA
First graph is cam only C5 (853heads, M6, basic bolt ons)
Second graph is same car with addition of good heads (Cartek 4X) and 90/90
Look at the Trq below curve on 2nd graph 400lbs at 3.5K rpm (yes it is a 346cid )
First graph is cam only C5 (853heads, M6, basic bolt ons)
Second graph is same car with addition of good heads (Cartek 4X) and 90/90
Look at the Trq below curve on 2nd graph 400lbs at 3.5K rpm (yes it is a 346cid
) TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Popcorn idle of RS cam with proper valve events. 8*overlap
http://www.youtube.com/watch?v=LpU-CC5OOM0
http://www.youtube.com/watch?v=LpU-CC5OOM0
