L88 cam in L78?

[JLerum]

Casey,


Because the car has independent rear suspension it is some what complex. He has 3 drave shaft loops. 1 for the drive shaft and 1 for each axle shaft(mini drive shafts). Than he has some kind of support on each side that would keep the tire (wheel assemble) from colapsing just falling over if their was a failure of the wheel bracing. When I asked how much it all weighs he said about 160 lbs.

Pete,

I saw the cam card and I thought I remembered 112 lobe seperation. The lifts were the same and the duration as noted above. I know that it was not a rapid lift cam by the lash that was recommended, .026 intake and .028 exhaust. The cam came from Bullet cams.

JIM

[Fhakya]

What!? Wow, this I need to see pictures of. What indep. rear was employed?

[Chevy454]

Since it's Pure Stock, I'm gonna guess it's the stock '68 rear. [img]/ubbthreads/images/graemlins/tongue.gif[/img]

[John Brown]

Sam,

Just to reinforce Rob, Pete, and Jim's explanations of the effects of cam timing, lift and duration vs. streetability, let me say there are times when at work I have too much time on my hands (like today). I also have Desktop Dyno and Desktop Dragstrip. A couple of years ago I ran computer simulations of a friends car combination using factory big block cams and found that the less radical cams would make more usable power and give better E.T.s. After taking lots of grief from his "engine guru", he finally tried the lowly 375 horse 396 factory cam. Result, more power, lower E.T. and plenty of vacuum to run the power brakes. So if you have access, build your combination on the computer first, then buy the parts. You won't be dissapointed.

[JoeG]

Hello John,
Is that the DESK TOP DRAG & DYNO 2000 program ?---How do you like it?----------JoeG

[John Brown]

Yes, 2000. It's a good tool, not 100% accurate predicting E.T.s since we race on Repo Polys, but it does show trends. Makes it easier to see which direction to go on changes. I understand there are newer versions that are more accurate, but we are only looking for trends for predicting results.

[JoeG]

Thanks John--I just wanted to tinker with some different engine modifications and set up a cyber track car.--always wanted to pick it up ,just keep putting it off for one reason or another-----JoeG [img]/ubbthreads/images/graemlins/beers.gif[/img]

[GMH454]

Sam lots of good advice here. Don't use the L88.
Drove a A/Prod Vette car around a track once. Memorable experience. Car weighed 2700lbs blueprinted crate L-88 1974 vintage (cost around $540 for the short block in 1974 )Holley 850 factory intake 074 alloy heads, sewer sized side pipes and big 10" racing wheels and tyres.
Going around the track under 4000 rpm was very disappointing. Start pulling in the hi 5000s and all hell broke loose.
Very peaky. NO torque down low.
At around 5400 rpm it would break the tires loose in 3rd gear at around 120 mph.
A great racing legend best left on race tracks
Have fun.

[Born30YrsLate]

I'm still trying to figure out all this camshaft stuff...the question I have at this point is that the powerband for the 396/375 cam is 4000 rpm (2500-6500) but the powerband on the L88 cam is 2600 rpm (4400-7000)...what makes the powerband so short in the L88 cam? [img]/ubbthreads/images/graemlins/confused.gif[/img]
Also - the next motor that I build is going to be an L88...I will be using the 074 heads and 198 intake as well as all the other correct parts for this motor, now after reading about the L88 cam I'm thinking that I don't want to use factory cam!.....What is a good cam that I can use instead of the factory L88 cam for a good powerband up to 7000 rpm?....this car will be driven on the street mostly and that won't be very often and maybe a couple passes at the track. This motor is coming with the car I'm buying which is why I'm building this L88 and I'm looking to get at least 525 peak hp between 6500 and 7000 rpm out of it.
As a side note the motor will be backed up by an M22 and 4.56 posi and will have either 255/60R15 or 275/60R15 rear tires if that helps any?...... As always everyone's input is greatly appreciated...... [img]/ubbthreads/images/graemlins/beers.gif[/img]

[Chevy454]

Are you gonna run headers, Fred? Back in the day the hot ticket was to run the 143 cam (L-78/L-72) in the L-88s. 525hp shouldn't be too tough for an L-88.