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Discussion Starter · #1 ·
I have done cam swaps on someware between 14 and 16 1985-1986 corvettes over the last 10-12 years (lost some of the records) but generally the best overal results have been with the CRANE 114132 cam on nearly stock engines, it works with ALL the stock parts, it does not have clearance problems in the stock engines valvetrain or piston to valve issues, it passes emmission testing, it adds a slight lope to the idle, and it gives about a 30hp boost in performance with nearly stock low rpm torque yet improved higher rpm breathing. it costs about $130-$150 at most discount suppliers (WITH LIFTERS) and it works with stock rockers. crane says it requires a 3.73 rear gear but Ive installed it in almost every case in corvettes with the stock gearing with ZERO PROBLEMS , its power range is 2000rpm-5000rpm, headers and porting the TPI intake help it work even better but are not mandatory.

http://dab7.cranecams.com/SpecCard/DisplayCatalogCard.asp?PN=114132&B1=Display+Card
 

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Cleaner than Stock, Faster than Phock
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726 Posts
Hey Grumpy, I dynoed my Miniram 406 with the .225/.233 @ .050, 280/289 Adv-Dur, and .541/.526 lift with Dart 215 CC heads, compression 10.3:1

I was really dissapointed with the results of 350RWHP and 376 RWTQ

So I sold the Dart 215cc heads and bought a set of AFR 210CC race ready heads that I will bolt on when they arrive in @ 4 weeks.

Is the .225/.233 hyd-roller cam capable of 400RWHP? This is my goal and I figured that after I dyno the AFR heads, I will make a cam swap if I dont get to the 400RWHP that I desire.

BTW, I do not want a mechancial roller setup at all.

Also, I will bump the compression up to 11.1:1 by having the new heads machined to 68CC
 

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Discussion Starter · #3 · (Edited)
Im not surprized at your results simply because the 215cc heads and mini-ram is designed for an effective rpm range of about 5000rpm plus, while the cam is designed to produce mid range TORQUE in the 2500rpm-5500rpm range
with that original combo the cam is already running out of its rpm range before the cylinder heads reach their most effective rpm range. that cam would work OK with a PORTED TPI intake but not the miniram. I run a CRANE 119661 and probably should run a CROWER #00471 with my custom stealth ram, for the miniram youll need to more closely match the rpm ranges,those AFR heads will help but again the heads are designed for higher rpm ranges.
talk to the cam company of your choice but Id be looking at at least a [email protected] .o50 lift duration cam with between 110-112 LSA and 11:1 cpr
but keep firmly in mind the cars stall speed and rear gear ratio must alls be matched to keep the engine in that proper rpm range or the corvette will be a dog
youll need a 3000stall and 4.11 rear gear to match the cam/intake combo correctly
as a general rule you can think of your engines displacement and stroke and compression ratio to a large extent limit the engines potential torque
the engines air flow ,cam timing,(duration) port cross sction size, port lenght and header primariers effect to a large extent where in the engines rpm range the torque peak appears,
since the formula for HP is (RPM x TORQUE /5252=HP) look at the results if the engine makes the same torque but the torque curve is moved 1800 rpm higher in the rpm range
400tq x 3500/5252=266hp
400tq x 5300/5252=403 hp
 

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Cleaner than Stock, Faster than Phock
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726 Posts
Thanks, I know that SKI runs a 242/242 solid roller, I did call Comp Cams and asked them what they could provide for a cam that would mimick the Solid-Roller TPIS 701 cam.

700-701 234 I Profile
Intake Exhaust
Advertised duration 278 278
Duration at .050 242 242
Gross lift .572 .572
Lobe separation 112



The gave be this custom in the Hyd-roller a custom cam:
RPM range
3000-6500
Intake/Exhaust
242/242 @ .050
294/294 Adv Duration
112 LS
380 lobe lift
.608 /.608 with 1.6 RR's


Look right?
 

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Cleaner than Stock, Faster than Phock
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726 Posts
Just called Bob at Bullet Cams, www.bulletcams.com. They custom ground this cam that I now have.

He recommends the same the same as you Grumpy, he said he can regrind my cam to a ..230/.236 or a .233/.240 with a little more lift.

But he says that anything more than that would not be a very streetable car.

So I think they are my best bet, only $125 to regrind the cam.
 
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