Most liked posts in thread: How to Destory a Thread ...was...The Truth About Valvesprings!

VERY nice! Thanks for posting. Not that I'm modded in any way except a short shift kit and auto up circuit, unfortunately.

 

Nice info. Matt I did notice a difference at high RPM after my set was installed. Where my car seemed to, well not to say it bogged down up there, but after install there was a much better feel all the way to my 7500 redline.

 

Matt great article.

http://www.fes-auto.com/upload/articles/HotRodValveSpringArticle.pdf

 

are you suggesting that Cosworth put springs on the car that are NOT able to rev to 7500?

 

As per COSWORTH Engineering Development Department Mini Cooper engineer for canceled project. They used a single spring using the specification from an oem MSC spring and out sourced for production. Which later became a boxed COSWORTH spring. On the Dual spring COSWORTH head offered either Ferrea or Super Tech Spring.
The spring claims are based on a single spring capability alone. Not the application of the MINI. See all the suppliers information.
The liberties of advertising clarity is never certain unless exactly stated.

COSWORTH never gave a relative operating range of their supplied completed head. I believe if you look at the ad it said something like spring capable of going to 10k rpm? Which really in a technical sense did not pertain to the overall head but good to advertise?

Information obtained by me talking to COSWORTH USA.
Cosworth USA

 

so you are implying that Cosworth is lying?

 

No one is starting anything. I'm just surprised that Jim would say something of this nature when he has sworn numerous times that Cosworth knows what they are doing. Seems kinda odd don't you think?

As for running different springs etc , I saw 40+hp differences on my big block back in the day but for a Mini I highly doubt measurable gains anywhere. As you noted, if you had a way of testing it I'm all for it. I'm always looking for the better products. I have yet to see anything "for sure" that has "proven" to be better beyond a doubt.

Reading some article that pertains to a different engine is pointless in my opinion. Food for thought.

 

Matt, I think it's a great article about V8s and what they have seen. How exactly this info translates to our Mini's has left much to the imagination. It's like telling everyone they need to drop their factory oil pump because a dry sump's better. Is it really needed?

I'd be much more impressed if you took the extra hour to do a before and after dyno on Jimini's car. We all know about butt dyno's and how they relate to Mini topics.
Then again it's much easier selling products through theory instead of performance.

As I mentioned earlier I AM LOOKING FOR THE BEST PRODUCTS OUT THERE......I just want some proof it works on OUR car, not in some engineer's head

 

Good Article. Dr O. !!

As the camshafts become a bit more radical and with more aggressive ramp angles, it is good to know there will be a spring on the market that will carry the higher lift and duration numbers.

Valvespring is a over missed performance item.. some used to feel if the cam didnt stack the spring, you were good. Not really knowing that the pressures needed to keep the valve closed ( to stop seat bounce) and the power loss in harmonic vibrations was something to be considered also.

The Conical/ Beehive has been out for YEARS on the other Performance applications, the Conical design has proved its self many times over. As a fact some OEM cars also use the Conical design.

Good info!

Just me........................................

Thumper

 

what I found fascinating was the stock JCW Head on the Grand Am cars had no issues with the Newman cam , rev'ing it to 7500. Not one single valve spring failure and those engines run near redline for almost 2.5hrs at a time. Much more abuse than what a street car will endure........ hard to doubt actual performance vs "engineered" theory....... just my .02 until it's proven otherwise

 

true enough, but based on data logs and dyno graphs it's NOT floating the valves. So at least I have some form of testing done. Like I said, some real testing done on the springs besides someone's butt dyno would be fantastic.

I can tell you we went 2:10 with the stock head at Watkins Glen running the guts out of the car. It must have working pretty well:devil:

3-5sec faster than the year before and that valvetrain was on ferrea:devil:

 

LOL! My car revved just fine to 7500 before the NS springs, but I notice an improvement after install So here we are again with the Cosworth BS rrr: We all know Jan that you know better than Cosworth :lol: :lol:

 

In my opinion your race products don't mean crap for our daily street driven cars :idea: To quote you from a sewing forum, "The rotrex has an advantage as the torque is up high in the power band so it's easier to drive".


:lol: What kind of BS is that? No bottom end has an advantage? Whatever dude :crazy:

Food for thought

 

not so its easyer to drive but easyer to get the torque to the ground.
who says the race products don't mean anything for the street, i daily drive my car with a "race" cam in it. works fine.
everyones diffrent. I think the point that was trying to be made was that you had a cosworth head and swore by it now your saying that these springs are a god send
Thats pretty much saying that the cosworth guys had no idea what they were doing right?

 

so you say it bogged down up there............

well.......what was it? You just said it bogged down.........

the rotrex does have an advantage, maybe you should educate yourself before inserting foot into.........