with bobmic93 you need headers and a GOOD tune.
Help me understand these cam specs
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Help me understand these cam specs
I have recently talked to a local LT-1 guru and below is a recipe for some cam specs he gave me. Cam specs are like a foreign language to me, so I'm just trying to see if any of you gurus can tell me what you think of this custom grind and what it all means to me.
Lunati - Grind Number 54799
238 244 110 Lobe Separation
530 Intake 530 Exhaust
What's this mean?
Lunati - Grind Number 54799
238 244 110 Lobe Separation
530 Intake 530 Exhaust
What's this mean?
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
the 238 244 is the duration at .050 it will have a nice lope to it.
the 530 530 is the lift not a lot of lift for the duration it has but its not bad. the 110 seperation is a little tougher to tune with the the computer. the 112 114 116 are easier, but i like 110- 112 ls
i like the specs and it should pull hard to @6500rpm and make over 400 rwhp in a 383.
i'm sure someone else can tell you more then i can.
the 530 530 is the lift not a lot of lift for the duration it has but its not bad. the 110 seperation is a little tougher to tune with the the computer. the 112 114 116 are easier, but i like 110- 112 ls
i like the specs and it should pull hard to @6500rpm and make over 400 rwhp in a 383.
i'm sure someone else can tell you more then i can.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
the 238 244 is the duration at .050 it will have a nice lope to it.
the 530 530 is the lift not a lot of lift for the duration it has but its not bad. the 110 seperation is a little tougher to tune with the the computer. the 112 114 116 are easier, but i like 110- 112 ls
i like the specs and it should pull hard to @6500rpm and make over 400 rwhp in a 383.
i'm sure someone else can tell you more then i can.
the 530 530 is the lift not a lot of lift for the duration it has but its not bad. the 110 seperation is a little tougher to tune with the the computer. the 112 114 116 are easier, but i like 110- 112 ls
i like the specs and it should pull hard to @6500rpm and make over 400 rwhp in a 383.
i'm sure someone else can tell you more then i can.
I'm planning on using this cam with my LT1 heads being CNC ported by a local machine shop. I'm going with thier basic street/strip porting which will include bowl work, runners, 5angle valves and lapping etc.
I also plan to use an Edlebrock Air Gap LT1 intake port matched to my heads. I'm going to mount a 52mm throttle body and I bought a MSD Opti to hang on the front. I'm not sure about headers at this time because of money, but they will come in the future. I am also going with 3.54 or 3.55 gears in the stock D36.
I'd like to see 350 RWHP or 12 seconds at the track.
I have been to at least two All Corvette Races at our local track every year for the past four years with one of the slowest sleds out there. I'm ready to get some respect!!
Melting Slicks
Joined: Jul 2004
Posts: 2,695
Likes: 0
From: Chicago Illinois
Respect is on its way. That looks like a good cam. I love the 110 lsa. The person whos helping you with this grind has to match this cam with what your heads will flow, gears, stall, ect... not to mention where you want the power( up high , down low or more midrange). You might be choking this car though without headers. Do it right and get the headers. H/C without headers is like having a big bowl of pasta without the gravey. Just for reference my h/c with headers netted me 90 rwhp and 50 rwtq. Im sitting at 365 rwhp and 350rwtq and running low 12s at the track. Satisfaction for me is seeing the C5 Zo6s in my rear view mirror. My Lt1 heads ported 190cc and cam 215/224 with 110 lsa. You look like you have a much more aggressive cam. If tuned correctly and the heads are done well I predict youll see just under 400 rwhp. You can listen to what my 110lsa cam sounds like in my signature. When all is done the tuner is the most important man on earth. Get a good one!
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
I'm planning on getting a rough tune through PCM4Less, then after its all together and running, either taking it back up to Pennsylvania and having it final tuned, or getting it fine tuned at Tony's Corvette's in Gaithersburg who is a member of my club. We'll see what transpires between now and Spring time when I think I'll have this all wrapped up.
Advanced
Joined: Feb 2004
Posts: 88
Likes: 0
From: Jacksonville Florida
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
You better consider a 4.10 gear to make that cam work right with a 350. Final tune done in person is the best thing you can do, it will take time to get it right with that kind of cam timing.
So whos the guru who suggested this build?
So whos the guru who suggested this build?
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Why is that? what makes a certain grind work better with a particular gear ratio? This is what I need to learn. That is why in my subject line I said "help me understand"
Thanks in Advance
PS - The guru is just a local guy that builds nothing but camaro, impala and corvette motors. He buys lots of stuff from the NAPA guys and also gets into Speed Unlimitied on occasion to rachet jaw with the guys in there. I picked up one of his cards at the racetrack one weekend and recently gave him a call. He seemed sensible and claimed to have used in this grind in a lot of similiar street strip combinations as the one I am looking at running. He uses no hyperbole, and he really don't care what cam I use or how I set it up, it was just a suggestion he made.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Because of the duration (238 /244 ) that cam is designed to work better in the upper revs than lower.
Relates also to the quote above as to higher stall convertor.Lets engine get into cam operating range faster.A more "bottom end " cam would have the same lift you mentioned but less duration.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Lower duration cams produce the power in the lower RPM range. Larger duration cams operate at higher RPM, but you will lose bottom end power to gain top end power as the duration is increased.
Because of the duration (238 /244 ) that cam is designed to work better in the upper revs than lower.
Relates also to the quote above as to higher stall convertor.Lets engine get into cam operating range faster.A more "bottom end " cam would have the same lift you mentioned but less duration.
Because of the duration (238 /244 ) that cam is designed to work better in the upper revs than lower.
Relates also to the quote above as to higher stall convertor.Lets engine get into cam operating range faster.A more "bottom end " cam would have the same lift you mentioned but less duration.
Also noted by SL.LT1 - I'm into conservative if it will get me to 350hp
Thanks too. any suggestions on cam grinds?
Also - Additional information - I was planning on a 2400 stall converter
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
IMO, that's a lot of duration for a street driver. Have you considered other cams, if you want BIG for a 350ci., the comp cams xr 276 is a good choice that works. Like others are trying to convey is w/more duration, bigger gear, more converter is all part of the territory (not to mention vacuum at idle).
Not enough can be said about having some really working with the tune.
Not enough can be said about having some really working with the tune.
Last edited by mseven; Sep 5, 2007 at 09:21 AM.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Sh*t no!! It will still drive reasonably normal at lower throttle, will just feel like the trans is slipping abit. But when you put the boot into it, itll allow you to get right into the power without having to wait for it to build up to it.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,705
Likes: 30
From: Chesapeake Beach Maryland
2015 C5 of Year Finalist
Only kidding
- I just like to be different - I don't want the kit, and while I was getting a cam, I'd like to get a grind that is more tailored to what I'm doing. That is why all the questions. I'm just poking for information and doing some research. Thanks, I figured someone would ask that sooner or later.
Streetable is a very loose term here on the forum too. What is streetable to one guy is not to another. I would like to be at the edge of streetable but still be able to enjoy driving my car for a few hours to the beach and then the following weekend take it to the track at a club race day and let the C5 guys see that a C4 can keep up.
Last edited by biggrizzly; Sep 5, 2007 at 09:45 AM.