I'm building a 400 for my 79. The block is .030, decked with f/t pistons .015 in the hole. RHS 220 heads, SCAT 9000 crank,6" I beams, forged f/t pistons, a ported set of 2 1/2 ramshorn manifolds and a performer RPM spreadbore intake with a JET Performance QJet. Compression is 10.7:1 3.70 rear and a super T10 trans. so here is the million dollar question. I have a few sets of comp roller lifters w/80 to 105 passes in 1 of our dragsters and a few sets of v/springs that set 160-170@1.850,and a couple of roller cams that I could have reground. so back to my question---Midway Performance will regrind my cam for 100.00 seems like a cheap way to have a solid roller. So lets have some suggestions on solid roller profiles, giving adequate vacuum and working w/a RPM intake w/QJet and using manifolds 2 1/2 duals into flowmasters. Thanks for your input.

 

Hey Tripp, You are starting to make it a bad habit hanging out on the C3 board now. Seriously though, and thinking out load here, I think you could look at profiles similar to the LS7 cam to make that monster motor work with stock exhaust manifolds. That has a very wide LSA, over 120 degrees I believe, so that would leave out using your existing cam cores. Another idea is something like the LT1 cam with its 116 LSA and early opening exhaust. If you have Engine Analyzer 3.0 or 3.2, you can play around with different cam ideas.

Good Luck with the new project.

 

Thanks Scott, I spoke with Midway Performance and he wanted a centerline of 112 with 244/248@.050 and around .560 lift. I think AaronZ on the C-2 forum has one of his 30-30 cams and is very pleased. I was going to go with a good ole hyd cam but thought this may be a cheap way for more go. I thought there had been a few folks with solid rollers on the street, that would share some info. I have some time the machine work is complete, will be balancing the rotating assembly next week then assembling the short block, while I contemplate cams.

 

If I recall, Aaron does have the 30-30 type of cam BUT is running headers to make that thing work. He has posted so may threads on that deal, with and without the stock exhaust etc, but I recall it not really "coming on" until he uncorked it. SWCDUKE has done extensive cam evaluations and a few designs for use with stock exhaust manifolds, and nothing works as well as the stock type lobe profiles as with the LT1 cam. He has several proprietary cams running in a few hyd 327s that work extremely well.

 

That cam that was recommended to you is just about what I had in my head when I read your post.

 

If you're going to run a solid roller on the street, you might want to groove your lifter bores to get extra lube to your lifters.

http://store.summitracing.com/partde...5&autoview=sku

Groove your lifter bore for optimum performance.
These COMP Cams lifter bore grooving tools are designed to groove the lifter bore to ensure that pressure-fed oil is directly injected into the contact area between the lifter and the camshaft. Increased oiling will significantly decrease wear on the camshaft and lifters, and decreases the risk of premature failure during the break in process. They include a carbide bit cutter, grooving tool, and handle. Replacement carbide bits are available separately.

 

Thanks for the info guys, Scott I wonder if SWCDuke ever did any tests on a 400 with larger heads and and RPM intake which I would say is a bit better than my 365hp intake and 600 carb.

 

I am looking to get a bigger cam, I wimped out when I built my motor, I used a comp Cams 280H and it's not enough. I called Comp Cams, the guy said for Hydraulic flat tappet to use #12-246-3 http://www.compcams.com/Technical/Se...umber=12-246-3

and for the hydraulic roller retro-fit use kit # CL12-433-8 http://www.compcams.com/Technical/Se...umber=12-433-8

I'll probably spend the money and go for the retro-fit, I cheaped out once and paying for it now, lol. I told him it was a street legal car but will be mainly used on the strip.

Here's my motor build.
1974 350 L-48 engine
Bored .030 - making it 355
scat crank and rods - stock sizes
10 1/2 : 1 compression pistons
Comps cams 280H - Cam Style: Hydraulic flat tappet
- Basic Operating RPM Range: 2,000-6,000
- Intake Duration at 050 inch Lift: 230
- Exhaust Duration at 050 inch Lift: 230
- Duration at 050 inch Lift: 230 int./230 exh.
- Advertised Intake Duration: 280
- Advertised Exhaust Duration: 280
- Advertised Duration: 280 int./280 exh.
- Intake Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
- Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
- Valve Lift with Factory Rocker Arm Ratio: 0.480 int./0.480exh. lift
- Lobe Separation (degrees): 110
Dart Iron Eagle Heads - 65cc
- 200cc runners
- 2.02 valves
1.6:1 pro comp aluminum full roller rockers - brings lift up to .512
pro comp stub girdles
Holley street Dominator intake
Holley 670 Street Avenger Carb
HEI Distributor
shorty header going into 2 1/2 exhaust to sidepies
4-speed tranny
3.36 rear gears

 

The only problem I can see when grinding a race cam is that it can only be changed on the ramp speed and lift. You can not take a 106 LSA drag cam and alter the lobes into 112 LSA. Springs that only have 1.850 installed height are for lower lifts

 

OK I'm giving in to technology and durability and looking at hyd roller cams, I have a set of retro-fit lifters and short pushrods now just deciding on the camshaft. I'm looking at the xe288 comp, but would still like all of the input you guys are willing to give. I also have a set of comp pro magnum 1.6 rockers.

 

This would be great in a 406..... Lots of lift with wide lobe center

Hyd. Hyd. 2200 to 6200 12-468-810 292XFI HR13 292 300 242 248 .584 .579 113º