Stroker Motor Build For Towing
Aug 9, 2012 | 09:16 PM
#61
I think I know how I am going to proceed. After reading a bunch and talking to a well established cam designer, it is seems the cam I was spec'd would be awesome for a lightweight f body but definitely not a heavy truck. Roger Vinci has recommended a setup that sounds pretty good. A baby cam with 1.8 rockers. He has a list of cams specifically designed for L92 heads for truck use. For my setup he recommends this cam (his smallest):
DUR @ .004" 272*/284*
DUR @ .050" 210* / 222*
LIFT .551 /.551
LSA 116*
According to Roger, with 1.8 rockers the lift will increase to .583" and will add loads of torque, because they force the valves off the seats much quicker and initiate and maintain air flow. The 116 LSA will let it idle smooth and I can get rid of the reversion problem I also have.
Then, when budget allows I will top with a TVS 2300 which will work good with the cam also. But for now, I think the basic cam & rocker swap is the way to go.
DUR @ .004" 272*/284*
DUR @ .050" 210* / 222*
LIFT .551 /.551
LSA 116*
According to Roger, with 1.8 rockers the lift will increase to .583" and will add loads of torque, because they force the valves off the seats much quicker and initiate and maintain air flow. The 116 LSA will let it idle smooth and I can get rid of the reversion problem I also have.
Then, when budget allows I will top with a TVS 2300 which will work good with the cam also. But for now, I think the basic cam & rocker swap is the way to go.
Aug 9, 2012 | 09:40 PM
#63
It's a little low but that was on a Dyno Dynamics which is notorious for making low numbers. They don't call it the heartbreaker for nothing. Also, my exhaust is holding me back (it's a single 3"). The low-end torque is fantastic though, even with all that duration. I'm not at all disappointed with it. I've run a 12.4 at 113 at 3600ft elevation with just a 2600 stall and no weight reduction. I'd love to see this setup with a good 4" exhaust and a 2300 blower, however.
Mileage is around 11 or 12 in the city but I've never driven it mildly to find out what the max would be. It's closer to 17 on the highway.
Edit: My setup makes 485 ft-lbs at 3500 rpm's. I can't complain about that.
Mileage is around 11 or 12 in the city but I've never driven it mildly to find out what the max would be. It's closer to 17 on the highway.
Edit: My setup makes 485 ft-lbs at 3500 rpm's. I can't complain about that.
Last edited by swift700; Aug 9, 2012 at 10:09 PM.
Aug 10, 2012 | 06:11 AM
#65
It's a little low but that was on a Dyno Dynamics which is notorious for making low numbers. They don't call it the heartbreaker for nothing. Also, my exhaust is holding me back (it's a single 3"). The low-end torque is fantastic though, even with all that duration. I'm not at all disappointed with it. I've run a 12.4 at 113 at 3600ft elevation with just a 2600 stall and no weight reduction. I'd love to see this setup with a good 4" exhaust and a 2300 blower, however.
Mileage is around 11 or 12 in the city but I've never driven it mildly to find out what the max would be. It's closer to 17 on the highway.
Edit: My setup makes 485 ft-lbs at 3500 rpm's. I can't complain about that.
Mileage is around 11 or 12 in the city but I've never driven it mildly to find out what the max would be. It's closer to 17 on the highway.
Edit: My setup makes 485 ft-lbs at 3500 rpm's. I can't complain about that.
That tq sounds nice
Aug 10, 2012 | 11:03 AM
#66
Thread Starter
Launching!
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From: Merritt Island, FL
Your welcome to drive to my place and help! Free beer and BBQ. 
But it will be about a week or so until my YT 1.8 adjustable rockers get here. It seems they are on back order at Scoggin Dickey.
That is all music to my ears! It is interesting that the cam I am dumping is similar to yours but with a narrower LSA.
I do most of my driving on the highway. Heck, the best my old 5.3L would do was 15 mpg. It is nice to use very little peddle with the higher hp engine.
I am now trying to figure out which blower to use. I need to use my cable throttle with a rectangular port manifold. I think most of the newer superchargers don't have a bracket or boss because they are intended for DBW. I might need to special order this puppy. What are your thoughts on a TVS2300 vs. a Whipple?
But it will be about a week or so until my YT 1.8 adjustable rockers get here. It seems they are on back order at Scoggin Dickey.You are on the right track. I am using Vinci's Crane roller rockers and one of his cams along with a TVS1900 on my 383. I'm getting 500/500 at the wheels and have driven 9000 trouble-free miles, almost half of it towing a 7000lb trailer. I tow at around 2100 RPM's at 65MPH in OD and RARELY have to gear down, even going up some decent hills. It's awesome but it sucks some gas for sure.
I am now trying to figure out which blower to use. I need to use my cable throttle with a rectangular port manifold. I think most of the newer superchargers don't have a bracket or boss because they are intended for DBW. I might need to special order this puppy. What are your thoughts on a TVS2300 vs. a Whipple?
Aug 10, 2012 | 03:16 PM
#69
Ever considered maybe going to a Pro Charger??? I hear there more fun to drive and in a swap comparison have made more power... Ask Brian AKA Blown Chevy from Super Charger Connection. He is a dealer for all brands.
Aug 10, 2012 | 05:26 PM
#70
Man Motor club
Joined: Jun 2007
Posts: 2,623
Likes: 1
From: Sunniest city on Earth
Yes, the Whipple is a twin-screw, hence my statement 'while the twin-screw is more efficient'. The TVS2300 is a Roots.
Prochargers and PD blowers have different powerbands and need to be set up differently more high performance.
Prochargers and PD blowers have different powerbands and need to be set up differently more high performance.