TYTILIDIE
METH HEAD
https://www.summitracing.com/parts/cca-cl09-430-8
Looking at this cam, what does anyone who knows anymore think?
Looking at this cam, what does anyone who knows anymore think?
Cam Opinion
- Thread starter TYTILIDIE
- Start date
proptop
Donating Member
Not an expert here but I think that we would need to know more about the build (turbo size and Generation). Intended use of truck race/street, motor size/stroke. Head type and any work that has been done to them. I went and looked it up on the link and my thoughts is that it is a bit big for a daily driver (224@50) might be a little rowdy on idle also might bleed the vacuum down a bit. I had a cam a few years ago similar to this but it was a bit smaller 210/210 112 and it made 19" of vacuum in park and about 17" in gear in a 265 ci motor. Might have been a bit small but it made a ton of torque and torque is what moves the trucks.
Bob
Bob
proptop
Donating Member
proptop
Donating Member
Wow,
That is really close and I would bet that you could throw a blanket over both of them and they would idle very similar and make about the same amount of vacuum/power. These v6 motors don't need a lot of cam. The bigger the cam the harder you have to turn it. In addition you have to have a bigger convertor to get them to spool up on the street. Next time/cam I might narrow the lobe separation a little not sure yet.
Bob
That is really close and I would bet that you could throw a blanket over both of them and they would idle very similar and make about the same amount of vacuum/power. These v6 motors don't need a lot of cam. The bigger the cam the harder you have to turn it. In addition you have to have a bigger convertor to get them to spool up on the street. Next time/cam I might narrow the lobe separation a little not sure yet.
Bob
IGottaSy
Active member
Comp cams 19-118-4 claimed to add over 40hp alone. This bad boy works from 800- 4800 rpm which means higher stall not mandatory. Also, no need to re work heads for higher lift? Well, they also mention roller rockers with pushrods to fit. Don't go too stiff with the valves springs. Should be100 lbs seat pressure but someone correct me if I'm wrong.
fasttruck587
New member
I have a custom ground cam by RPM, Dur @ .050 224int 230exh 115 LSA
Here is a video of what the idle sounds like:
Syclone cusom cam idle
Here is a video of what the idle sounds like:
Syclone cusom cam idle
DaveP's Ghost
Well-known member
From my recollections when we were building Matt Q's engine, and I took a WAG and had a custom cam done for DesertSy, 114/115 is about right in a street SyTy.
The secret is LSA. Turbo motors want wider LSA to avoid reverse pumping or exhaust dilution of the chamber during overlap. Boosted engines do not need or benefit from overlap or short LSA. Another aspect of "new think" regarding turbo engines is to make intake duration longer than exhaust duration. The exact opposite of what is done on NA engines.
Every book I've read about cams in NA engines states "the most important valve timing event is Intake Closing". It still is. But in a Turbo motor, you don't have to open the Intake as early or with as much overlap to get good cyl-filling. I've seen some turbo cams that have NO overlap. Turbo engines don't need or want overlap.
Keith Meeks
Member
That’s one of the best sounding turbo V6’s I’ve heard. Some serious baddassery going on there.
Keith Meeks
Member
Would you recommend that particular cam with a stock motor? Of so, pros and cons? Thanks for any input.