Scca Speed touring car specs

[greendragon]

http://www.world-challenge.com/competitors/vts/06-vts-mazda-protege.pdf
I thought this was interesting , there are even cam specs ,as well as rear suspension measurements for the latteral and trailing arms .

[daedalus]

great post!!! i would love to know if those cam specs would do anything for a turbo application, or what would need to be further required to get some power out of new camshafts?

[greendragon]

great post!!! i would love to know if those cam specs would do anything for a turbo application, or what would need to be further required to get some power out of new camshafts?
I do know that when Tri point was running the Protege they had adjustable cam gears and the engine were putting out approx 280 HP , mind you the engines are designed for flat out high revs of racing

[Killer 8]

I still wounder about what happen to tri-point because at one point they to where offering a turbo kit for our cars but after awhile it would always say the sit was getting reworked. To bad i don't live close to them i can only image the things they had on there protege cars and could have been sold when they switched to the mazda6.

[greendragon]

I still wounder about what happen to tri-point because at one point they to where offering a turbo kit for our cars but after awhile it would always say the sit was getting reworked. To bad i don't live close to them i can only image the things they had on there protege cars and could have been sold when they switched to the mazda6.
Heres the link to Tripoint
http://www.tripointengineering.com/

[Super Matty P]

Those cams on a turbo car would SUCK.

however I'd love to build a set of cams to these exact specs however I'm pretty sure their operating range is about 6000-9000rpms. Still be fun to see how hard the lope at idle.

[vindication]

one of the reasons tripoint stoped the turbokit for our cars is because the turbo company they were using(forget name right now) went under.

[daedalus]

Those cams on a turbo car would SUCK.

however I'd love to build a set of cams to these exact specs however I'm pretty sure their operating range is about 6000-9000rpms. Still be fun to see how hard the lope at idle.


What kind of lob, duration, and lift would you suggest for a turbo application?

[Super Matty P]

I'm not real good with cam sizing for cars. I did send this cam info off to a local cam shop (Paeco) for a breakdown of its powerband. See what it looks like.

For your turbo application you want less overlap (iirc). If I'm not mistaken They add a ton of overlap in high horsepower NA applications to increase how much air is sucked into the chamber . With a turbo you don't need that because the turbo is already forcing air in. But less overlap is supposed to help it spool up?? maybe I'm off here. Thats just what I remembered.

[XelderX]

^^^^

You r pretty much right on the overlap situation. Turbo cars don't need overlap because of the positive intake pressure. Overlap would only cause some of the boost to blow right out of the exhaust valves. In an NA setup you have negative intake pressure. Having a little overlap allows the momentum of the escaping exhaust gasses to help pull the intake charge into the cylinder while the piston speed is still very slow right after TDC.

[MetalSPEED]

nice pdf

[METAL]

BTW,these engines only have like a 30 hour life

[MetalSPEED]

well i can imagine that the 13:1 compression and high revs affect their lifespan but i didn't think it was THAT much hehe