Solid roller cam change will it do what I want?

B

bjankuski

Member
Listed below are my modifications, dyno sheets, and ET slip. My question is I want to change from a Hyd roller cam to a solid roller cam and the cam companies I talked to have made some suggestions that I am looking for feedback on their suggestions. I am skeptical that these cams will do what I want so I would like you guys to offer your opinions.

What I want is: 6500 RPM peak power, shift by 7000 RPM and a car that will run 10's in any weather. When I called the cam companies to see what they could offer to acheive these goals they all offered the below listed cams and each company said their cam would pick up 30 to 50 HP over my current cam with my combination. When I look at the specs I become skeptical since they don't seem that much different from what I am currently running, what do you guys think. I don't want to make a change and find out it did not perform as advertised.

I do not have some of the overall duration numbers but I believe they will be similar to the howards cam. I do belive the solid roller cams with the shorter overall duration will hit harder from low RPM when compared to my current cam but I am not sure if they will pull any more top end power.

Current cam is: Hyd roller 304/312 duration, 251/259 at .050 with .600/.600 lift on a 110 LCA installed at 106 CL.
Custom cam company: 254/258 @ .050, .620/.620 on a 110 LS installed on a 106 IC
Howards cams: 283/289 duration, 252/258 @ .050 , .600/.620 on a 110 LSA installed at 106 ICL
Comp cams: 254/260 @ .050, .632/632 on a 108 LSA installed on a 104 ICL

These are my mods:
1986 Coupe, auto, 3.45 gears, 1973 406, 11.5 to 1 compression, SLP cold air, 4" blowerworks MAS, Mono blade throttle body, USM Stealth ram, ported 23 degree Trick Flow Heads, that now displace 218cc with 2.08 intake valve, 304/312 @ .050 251/259 hyd roller cam .600/.600 lift on a 110 LCA installed at 106, 1.6/1.5 roller rockers, TPIS headers, TCI 3000 stall, 3" duel exhaust, custom chip, daily driver
RWHP 469 @ 6100, RWTQ 450 FTLBS @ 5300 gasoline (RWHP 480 @ 6300, RWTQ 462 @ 5300 on E85)
 

Attachments

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Re: Solid roller can change will it do what I want?

A guy with your background, I question why your only using 3.45 gears . Dana 44 or dana 36?
I Assume 44 dana, 1989 vintage.
A change to 3.90- 4.27 gears would be beneficial.
You have to clearance grind the dana 44 alumunum housing for ring gear. Actually reboxed Dodge Durango gearset.
Covered on Corvette forum by me on Dana 44 X2 3.90 Yukon gear Danaa 44 build.

How tall of rear tire used ?
25-1/2" ?
A swap to 28-29 Tall help MPH & ET.

Advertised cam numbers not real helpfull....
Need IVO IVC, EVO, & EVC.

.575-.650 valve lift get the job done.
I like 104-108 lobe centers.
Intake centerline installed depends upon car & driver lking & skills.
700R4 had terrible 1-2 RPM upshift drop.
Turbo 400 is close ratio style auto 3-speed.

BR
 
Re: Solid roller can change will it do what I want?

Your 86 is 3200#'s. I think factory AC in place. Lose it. Do further diet, 3,000#.
Install 1984 Z51 Rear leaf spring. Deliver more Antisquat hookup on launch.
Install real drag racing shocks all around. Fine tune shocks at track.
 
Re: Solid roller can change will it do what I want?

87vette81big said:
A guy with your background, I question why your only using 3.45 gears . Dana 44 or dana 36?
I Assume 44 dana, 1989 vintage.
A change to 3.90- 4.27 gears would be beneficial.
You have to clearance grind the dana 44 alumunum housing for ring gear. Actually reboxed Dodge Durango gearset.
Covered on Corvette forum by me on Dana 44 X2 3.90 Yukon gear Danaa 44 build.

How tall of rear tire used ?
25-1/2" ?
A swap to 28-29 Tall help MPH & ET.

Advertised cam numbers not real helpfull....
Need IVO IVC, EVO, & EVC.

.575-.650 valve lift get the job done.
I like 104-108 lobe centers.
Intake centerline installed depends upon car & driver lking & skills.
700R4 had terrible 1-2 RPM upshift drop.
Turbo 400 is close ratio style auto 3-speed.

BR
Click to expand...

I don't dispute anything you are saying if my goal was to only make the car faster but my goal is to leave all of the equipment I have in the car alone and still run 10's. I like the 3.45 gears for highway driving, I like the 700 R4 for highway driving, and I like air for highway driving. I put 10,000 miles a year on this car and do not want to lose my creature comforts. It currently runs bottom 11's high 10's and I am looking for this cam change to push me into high 10's in all weather.If I can get the extra 30 to 50 HP that the cam companies are claiming but still have a similar powerband I will acheive my goal.

I really enjoy blowing the doors off of someone at the strip with a car that looks stock and still has all of the creature comforts.

It is a Dana 44 from a 1994 Vette, and I am running 26" tires MT drag radials 275/40/17's.

Thanks for the help.
 
Re: Solid roller can change will it do what I want?

87vette81big said:
Your 86 is 3200#'s. I think factory AC in place. Lose it. Do further diet, 3,000#.
Install 1984 Z51 Rear leaf spring. Deliver more Antisquat hookup on launch.
Install real drag racing shocks all around. Fine tune shocks at track.
Click to expand...


You are correct at 3200 lbs empty, with me and my safety gear I weigh around 3450 lbs at race weight. I do have the Z-51 supension (1986) and I have stock shocks. The car will dead hook most days in its current configuration.
 
Re: Solid roller can change will it do what I want?

You can cheat slightly with the Terrible numerical RPM drop on 1-2 upshift.
Best guys at it build 900 HP C5 Corvette 4L60E trannies.
Guy in Chi town helped me with setup tips.

Key is perfect 2nd gear servo -2-4 band application with clutches. Sonnax & Transgo complete hardware in my 700R4.
Stock replacement china Reverse input drums no good.
Distort under high Rpm band application.
Heavy Duty GM NOS part made.
Has to be hand built by you or a trusted pro.
No high volume sales shops on CFC4.

YOU NEED A MAJOR INFUSION OF HP.
GRUMPY WILL HELP YOU.
CAMSHAFT SWAP ONLY PART OF EQUATION.
100 HP MORE.
Titanium intake valves worth $$. Proven by David Vizzard & Smokey Yunick.
Expensive yes. Do Ti intakes only.
C4 HEADER DESIGN CURRENT OFFERINGS SUCK.

BR
 
Re: Solid roller can change will it do what I want?

a 406 sbc with 2.08 valves has about 24.3 on this chart so its would in theory run best with about a 105-106 LSA cam lets say 106 LSA as thats easier to locate.
swapping to solid roller lifters from hydraulic will lower the valve train weight and allow a bit more rpm, the cam you have is almost correct for duration and lift but the hydraulic valve train limits your engines upper rpm breathing thru potential valve float which will tend to be better controlled with a solid lifter valve train, notice the cam Im suggesting is a solid lifter on a tighter LSA with just a bit more lift and duration, I don,t think with that 3.45:1 rear gear you will benefit from a great deal more duration, it might make better peak power but not in the rpm band that rear gear forces you to spend much of your engines rpm band in.
I also run a ported set of trickflow heads and a ported holley stealth ram intake so I have some limited experience with a similar combo
LSAChart01.jpg

if your running 11.5:1 compression and assuming you want to run high test pump gas , as you drive on the street
CrowerCamTimingChart_106-107.jpg

crane118751.png

ID be looking for something like this
http://crane.carshopinc.com/product_inf ... 013/118751
but Id call the crane tech guys and discuss its use in your combo, before ordering

CRANES PHONE : 386-310-4875
hsrrunners.jpg

stock un-ported runner entrances[/color]

portedhsr.jpg


don,t forget all that potential extra air flow from a correctly ported stealth ram intake and matching heads that can flow in excess of 300cfm per runner, requires 36lb -44lb injectors and a cam with enough lift and duration to allow that air flow rate to be effectively used if you expect the intake to perform to near its full potential,don,t forget all that potential extra air flow requires 36lb -44lb injectors and a cam with enough lift and duration to allow that air flow rate to be effectively used if you expect the intake to perform to near its full potential,
Id also point out what goes in,those intake runners gets mixed with fuel,and expands a good deal when burnt in those cylinders and needs to exit so the stock exhaust is woefully in adequate for a 450hp-550hp engine you might be considering building

porting the runner entrances like this helps flow significantly
 
Re: Solid roller can change will it do what I want?

It's a Super Torque builder that should provide a wide power band to redline.
102. IC. 110 EC. only 44 degrees overlap. Idle nice & be easy to tune for EFI using speed density or MAF program tables.
 
Re: Solid roller can change will it do what I want?

Thanks for the information. I want to eliminate any confusion, my goal is to run 10.90's or better in any weather not 10.0's.
 
Re: Solid roller can change will it do what I want?

bjankuski said:
Thanks for the information. I want to eliminate any confusion, my goal is to run 10.90's or better in any weather not 10.0's.
Click to expand...
There is no way your going to hookup easy in cool fall weather 30-50F here in the midwest.
The Grove. Byron. Joliet.
Grumpy giving you more torque & power everywhere.
 
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