Jon and I have talked about this and we are not saying. It's not that big of a deal, but it is one reason why the motor pulls to 6500rpm and doesn't die over 6000 like some cam kits do. He is using Ti retainers, Hi Tech Pushrods and 7/16 non Self Aligning Rockers.

Bret

 

my guess its probably a crane #99893



well thats alteast what i am using with my "healthy" cam.

 

Nope not them. I don't use Crane springs, not that they are bad by any means.

 

Yeah, this is where I really see gains over dynos I've seen with the CC306 & GM 847 that make close to the same peak HP numbers. Having 300 RWHP on tap by 4500 and still being within a couple of peak at 6500 is amazing. Like he said, even though I'm usually in the 4700-6400 range (where I average over 340 RWHP), it was important that the engine isn't just dead below that. It's pretty common on roadcourses to have a situation where you need to shortshift before a corner so you don't run out of RPM's at exit when you're still turning--where it would be a very bad idea to shift.

But even as low as 3500 I've got more torque than most cams peak. Heck, at 3500 I've got nearly as much RWHP as the engine peaked when stock! It's just amazing how Bret was able to come up with a cam that was exactly what I wanted.

Oh, and since I've seen it become a subject of controversy in other threads, I'll point out that all the above numbers are SAE. If anybody has a dyno they want to compare that's corrected to STD conditions, here you go:

http://www.jonaadland.com/NewPics3/CamdynoSTD.JPG

And in case anybody's curious what the car actually put down:

http://www.jonaadland.com/NewPics3/CamdynoActual.JPG

 

Nope, I know Bret well enough to know that this spring is from Comp Cams. It's also shaped like Marge Simpson's hair.

Nice numbers guys!

-Mindgame

 

You mean like a....uhhhh....beehive?

 

That was the shape I had in mind, thanks 4dr!

For those of you curious.... do a search for the great beehive spring article by David Vizard. Want a valve system mass approaching that of a Ti valve setup...... the beehive may be the way to go......


-Mindgame

 

Wow on the STD numbers, 370rwhp and 371rwTQ

Yes they are Comp Cams Springs, and I am a fan of beehive springs just like MG said, not going to say if they are or not but there are 5 different beehive springs that just Comp Cams sells along with some out there thru companies like Lunati and Endyne.

The David Vizzard article is a great read if anyone wants to read up on the benefits of beehive springs. I'm a fan of them in circle track cars for sure. I think we have talked about them in Advanced Tech a few times also, I know I could go on and on about the benefits of them, but at some points that is boring.

BTW MG the beehive springs work even better when you drop Ti retainers on them. 1/4 the mass of a standard steel retainer. Problem is most times we use them in circle track stuff is when it calls for a stock diameter steel retainer setup. Good thing there are blackening coatings for Ti to help with the camoflage.

Bret

 

Congrats Jon A. Looks like another happy customer, glad to see it. That SOB is making some sick power for that cam. Maybe time for another winter rebuild huh Bret?

 

Nice dyno numbers. Get some track mph numbers and back those dyno number up.

Ryan

 

Ryan,

I would like to see track numbers to back these dyno times up, but Jon's car is set up for AutoX predominately not drag racing. You can see that he's run some times previously and has done decently but is hindered by tires at the drag strip. (2.2 60 fts) I would expect him to run much faster MPH's at the track but unless he buys some DR's or gets .3-.5 out of his 60's then it's not going to be even close to mind blowing ET's. This cam is a really capable drag strip cam and would fit a 3000-3500 stall A4 pretty well, but to be optimum for a M6 with a big clutch dump we would go with a different camshaft. Every cam is designed for its intended application, this one was for a autoX car.

Bret

 

good job guys

 

I'll be at the track on the 26th, but my numbers won't likely mean much to you guys. I'm hoping for ET's in the mid 1:3X's and trap speeds around 150 MPH. There are other uses for HP, you know. I keep my foot planted at the 1/4 mile mark.

In all seriousness, I haven't been drag racing in a long time...sort of lost interest in it. However, I am curious what kind of trap speeds I could turn so if all the the other work on the car falls into line and I have some extra time, I wouldn't rule out making one trip to the strip. But don't hold your breath. If I do, I'll be on street tires and with the roadracing suspension the car won't launch worth a crap. Traction? This is my idea of traction:

http://www.jonaadland.com/NewPics3/315FrontTest.JPG

 

I like that. Put the tire where the work is being done.

I hope your new-found power gets you a PAX win!

Did Bret tell you he used to auto-x his GTI? A few PAX's. Fun to watch that V-dub 3-wheel almost every corner with little black clouds of street rubber around the 3 tires touching the ground.

 

Yeah, at the track I always go through front tires faster than the rears. Err, well, at least I used too....