Quick question: Whiplash cams...

Posted By: Pale_Roader

Quick question: Whiplash cams... - 05/10/11 10:15 AM

I just read about these in another thread, then went to the Hughes site and read some more. Sounds like someone was trying to solve as many ov the usual stock/unrebuilt big block issues as possible with one cam. Do they really work as well as advertised? No need for cut guides, more cylinder pressure, cool sound, reasonable powerband for the stock heads, etc.

I also noticed that there is one for the lowdeck and one for the RB... difference being duration numbers (229/242 @ 50 vs 232/245 for the RB cam). Any reason why the bigger cam wouldn't work as well in the smaller engine?

I have an unmolested low-mile 73 400 on the stand i had all but abandoned. Heads are off, cam is out. I was gonna put it in my Challenger for now (light 4-speed car), but the CR in the 7's really bothers me and i hadn't been able to decide on a cam to help fix its little problem. There is NO money for a rebuild. I have some cleaned up/ported 516's to put on it, a few intakes to try, and now this cam... well, the combo could actually be pretty decent.

Sound like a plan? My first choice was to find a nice running original 68-69 383-4bbl engine and dump it in, but suddenly now that i need one, these things are as rare as cheap hemis...

Posted By: scratchnfotraction

Re: Quick question: Whiplash cams... - 05/10/11 01:00 PM

the whiplash works very good in the low comp engines

SB or BB or B or RB they all work great.

member Lew has the black car on there web site to advertise the SB one in a stock 340

member Junky just went with one in his 383,he seems to like it and said it gave a good improvment over his other set up IIRC

maybe he will chime in on the specs of his 383

I dig the SB one and will be getting the roller cam whiplash next and will be getting one for my stock lopo 440

It does what they say it will do..idles like a funny car and smooths out about 1800 rpms for street cruzing and stop light to stop light action

I give it

Posted By: 70Cuda383

Re: Quick question: Whiplash cams... - 05/10/11 01:43 PM

I'd be careful in picking one for a 440 to run in a 383. sure it will fit and probably not have piston to valve problems, but the duration is designed to do what they say it will do, with the cubic inches that it has to work with. a larger cubic inch motor can take more duration and maintain the street-ability they proclaim.
put one into a 383 and the power band will move up in the RPM range to the point that it might not work all that well on the street without huge stall and gears.

if you're considering running the RB cam in a B motor...contact them and ask them what they think, and what they recommend that you do to make it work--stall, gears, etc.

Posted By: Pale_Roader

Re: Quick question: Whiplash cams... - 05/10/11 01:59 PM

Oh a phone call would definitely be in order before i spend money, for now i just figured i could get away with it because my car is light and has a stick. I'll also have the bonus ov having at least a little work in the heads and a good intake manifold and exhaust, so maybe a little more wiggle room RPM wise...

Posted By: Boise Chall

Re: Quick question: Whiplash cams... - 05/10/11 02:25 PM

I called them yesterday and they said that the 77 motor home 8:1 compression 452 head 440 I have is the motor they designed the cam for They said I can use stock springs and everything else. I'll be ordering their lifters too. I just wanted a good running 440 in this car not not a monster horsepower motor so if the whiplash cam makes it sound good that's a bonus. I should be ordering it today.

Posted By: Junky

Re: Quick question: Whiplash cams... - 05/10/11 04:18 PM

I'm very happy with it. With my 2500 RPM torq converter and 3.73 gears it pulls quite nicely up to about 3200-3300 RPM's then it really pulls! The engine will wind up to 6k with ease. Idle is meaty. If I'm not careful I can blow the 275/60/15 tires up in smoke from a dead stop by just smashing the go-peddle. If I do it right the tires will only spin for about 5 feet, then dig.

Engine specs: 383 stock bore/pistons (about 8.75:1 compression), Whiplash cam, Hughes lifters, Comp Cam valve springs, new stamped steel rockers, Edelbrock Performer RPM intake, 3310 Holley 750, 346 heads that have been ported and blended with 3 angle valve job and milled 0.030", Shcumacher Tri-Y headers, MSD, 2500 torq converter, 3.73 gears. When I get rich I'm going with a 10" 3500 +/- RPM torq converter.

Have plenty of valve to piston clearance.

Posted By: Fury Fan

Re: Quick question: Whiplash cams... - 05/10/11 07:46 PM

Quote:

Have plenty of valve to piston clearance.

To clarify - do you have clearance or you mean somebody should make sure they have plenty of clearance?

Posted By: Junky

Re: Quick question: Whiplash cams... - 05/10/11 08:05 PM

Quote:

Quote:

Have plenty of valve to piston clearance.

To clarify - do you have clearance or you mean somebody should make sure they have plenty of clearance?

Sorry. My engine's valve to piston clearance was good. I had it checked by the guy that degreed the cam in. It should always be checked.

PS, my flat top pistons are 0.020 in the hole.

Posted By: Pale_Roader

Re: Quick question: Whiplash cams... - 05/11/11 09:00 AM

Quote:

I'm very happy with it. With my 2500 RPM torq converter and 3.73 gears it pulls quite nicely up to about 3200-3300 RPM's then it really pulls! The engine will wind up to 6k with ease. Idle is meaty. If I'm not careful I can blow the 275/60/15 tires up in smoke from a dead stop by just smashing the go-peddle. If I do it right the tires will only spin for about 5 feet, then dig.

Engine specs: 383 stock bore/pistons (about 8.75:1 compression), Whiplash cam, Hughes lifters, Comp Cam valve springs, new stamped steel rockers, Edelbrock Performer RPM intake, 3310 Holley 750, 346 heads that have been ported and blended with 3 angle valve job and milled 0.030", Shcumacher Tri-Y headers, MSD, 2500 torq converter, 3.73 gears. When I get rich I'm going with a 10" 3500 +/- RPM torq converter.

Have plenty of valve to piston clearance.

Hmmm... thats actually pretty close to what i have lined up: 73 400, shaved 516 heads (haven't decided how much i'll take off yet, probably .060) mildly ported/cleaned up, ported Holley SD intake, Holley 800DP, whatever headers will fit with a 16:1 manual box and quick ratio pitman, 3" mandrel X-pipe T/A exhaust, MSD, 4-speed, and either 2.76 or 2.94 gears with Sure Grip (cant afford OD). Car should weigh 3200-3300lbs without me.

If i shave the heads for a 73cc chamber it comes out to around 9:1 CR with a steel gasket. Thats not terrible...

Any idea how much added CR the engine will "see" with this particular cam. over say, a stock 400-2bbl cam...??? I understand the cam does not 'add' CR, but i mean how much different it should feel? as in, like adding another half-point ov CR? 1/4 point? full point...??? Etc.

Posted By: DennisH

Re: Quick question: Whiplash cams... - 05/11/11 12:53 PM

The lope of my Comp Cam is sweet. I avoid fancy names like killer, awesome, etc.

Posted By: moparmandjh

Re: Quick question: Whiplash cams... - 05/11/11 12:58 PM

Quote:

The lope of my Comp Cam is sweet. I avoid fancy names like killer, awesome, etc.

Awesome, killer post!!

Posted By: court9155

Re: Quick question: Whiplash cams... - 05/11/11 04:45 PM

Nothing to do with whiplash cams (other than I plan to run one in a 383 with 516s, similar to you) but what converter are you going to use? Id think this cam will like a little more converter than the stock offering and with 2.76 or 2.94 gears Id be worried about being on the converter most of the time.....

Dan

Posted By: Crazy68Dart

Re: Quick question: Whiplash cams... - 05/11/11 05:50 PM

I am looking at these for a '68 383. What makes these cams more suitable for lower CR than say a comparable Comp cam, etc? I assume the response will be "nothing" and that it is just Hughes' marketing.

Barring any piston-to-valve clearance issues, what is the max lift stock heads (in my case 906) can handle?

https://board.moparts.org/ubbthreads/show...;gonew=1#UNREAD

Posted By: scratchnfotraction

Re: Quick question: Whiplash cams... - 05/11/11 06:46 PM

early intake closeing builds cyl pressure on a low CR engine for some pop in the cyl from what I understand about the whiplash

just sales pitch and voodoo

Posted By: Fury Fan

Re: Quick question: Whiplash cams... - 05/11/11 06:59 PM

I'm not super savvy on interpreting individual valve timing events (as far as relative numbers, anyway) but as Scratchin said, it has an early intake closing event. That doesn't necessarily build cylinder pressure as Hughes would want us to believe, it merely preserves whatever pressure a low CR can provide.

I suspect that combining OEM intake closing events with the rest of the parameters from a typical performance cam is what Hughes has done.

Pretty good timing, I'd say (pun intended) as there seems to be a lot more interest in using low CR late 440s these days, and that cam ought to be a good seller...

Posted By: Junky

Re: Quick question: Whiplash cams... - 05/11/11 07:43 PM

Quote:

Barring any piston-to-valve clearance issues, what is the max lift stock heads (in my case 906) can handle?

Other than milling/porting/blending the heads and a 3 angle valve job and the comp springs, nothing else was done to the heads which work just fine with the .518" lift of the Whiplash cam. Lift in reality is more like .490" since the rockers are not truly 1.5:1 ratio, there more like 1.4 or 1.45 to 1.

Posted By: Pale_Roader

Re: Quick question: Whiplash cams... - 05/11/11 11:28 PM

Quote:

Nothing to do with whiplash cams (other than I plan to run one in a 383 with 516s, similar to you) but what converter are you going to use? Id think this cam will like a little more converter than the stock offering and with 2.76 or 2.94 gears Id be worried about being on the converter most of the time.....

Dan

Heh... i'm going to use a clutch and pressure plate. I will never build an automatic Mopar again. The gearing for that is no more optimal, but thats all i have to work with, and i HAVE considered ALL the options. Leaving the OD option off the table, I would enjoy driving a car with 2.76's or 2.94", but i just hate 3.23's.

Posted By: Crazy68Dart

Re: Quick question: Whiplash cams... - 05/12/11 11:23 AM

I have a set of aluminum rockers planned for the other build that I will use. They are true 1.5 ratio. I just need to check things out to make sure clearances are okay.