Hope everyone has been having a safe and productive season so far.

I will be competing in TT3 in December, first chance to get back to the track, and will need to do a timing belt prior to the event. So, that being a good a time as any to do cams, I am kind of lost in what I would actually need. I prefer recommendations from fellow road course nuts as to what may work best for my situation.

The goal will be 3200lbs and 347whp end result when I do a full season. The weight wont be there but I'd like to get close to 347whp as possible with a flat as possible curve. Currently the car sits with 301/294 with the mods in my signature, stock motor and stock 9.8 turbo. I will shortly be changing fuel pumps, installing a set of FIC 950's, and setting up an E-85 track map.

With the money I will be spending on other items, the cam's w/ springs and retainers is all I'd have a budget for power wise.

Any suggestions?

 

Looks like you only have intake, exhaust, and some springs. If you want to be competitive in TT3 you'll need to drop the coin on a lot more then cams to keep up with some of your locals plus the times other regions are running. But I know you've been around so i'm curious, are you daily driving this thing or is it a track only car? Because i'd actually recommend a different route.

 

yes TT3 looks to be a very tough field.

As for your question, I don't think you can go wrong with HKS 272's on the VIII.

 

Balrok, right now it is a dd. The plan is to run a half season next year while get parts here and there and develop it some, then run the full 2015 season and try to go to nationals. By that time it will be a track only car, more than likely mid next year it will be pulled off the road. I am fully aware of the competition in my region in the class. Since I will be in there doing the timing belt soon I figure I might as well do the cams. What would your suggestion on a different route be?

Thanks Andy.

 

I think with an Evo IX turbo and e85 you'll have all the power you'll need. I take it you will be running no aero?

In my region, McKamey in a TT3 Vette I the guy to beat. He is FAST, usually beating up on TT2 through TTU cars.

Power wont be your challenge, its going to dialing in suspension/tires. Try to get your car as light as possible and than use ballast to better place that weight.

 

Shaun, i just installed the gsc s2 cams and the gsc high rev beehive springs with titanium retainers over the weekend. Total cost with the gates timing belt was about $1k, but would probably be a little cheaper for you since its an 8, and i dont think you have to do the valvesprings with the s2's on the 8, could be wrong. I'll let you know what I think about them once i get the car back on the road. You are welcome to drive my car next time we are at the track together and see what you think. I will be at RA in september for the NASA event.

 

Andy, thanks for the suggestions. A IX turbo would help, but I am wanting to see what I can do on the small housing turbo since most don't run it. I plan to run aero, will begin building between now and December. Splitter with full under tray and a diffuser, as well as trying my hand at airfoil design. With aero and a competition weight of 3200#'s it would put me needing 347, that is if my calculations are correct (I have done the math too many times to make sure it was correct. I will by tring to pull as much weight out and use as close to the max allowed ballast to hit the weight. I have a long list of items and using next year as test/develop before I run a full season.

Matt, let me know how they work for you. I think if you run the stock redline you don't need valve springs, but with the miles I have on mine it would be cheap insurance as to not float one. If some things change shortly with the job I will try to run the event as well. If not I will most certainly come down to visit for a day, work permitting.

 

I run 272 cosworth cams and they really do help on long straights, but I run 91. If you are trying to figure out where to spend the budget for the most overall gain now IMO I would do cams later since you plan on running E85.

TT3 is a very tough class for the Evo. It is very well suited for C5s running aero and lots of rubber. I ran very lightly modified in TTA for years but starting last winter I have been trying to build the car to be competitive in TT3 and see how it does at Nationals this year. Most of my investment has been lightness/chassis/setup/rubber and now trying to refine aero. I am testing if adding proper aero will be a bigger gain vs. the extra power I can run with stock aero and don't take the .5 penalty. We'll see...

 

Some good suggestions, I use S1 cams, you can use S2's but I don't think it's worth it with the low power requirement. Running the 8 or 9 turbo is great, however the issue has always been that they run out of steam after ~6.5k RPM, so to get that "flat" power band you need to move up to a 68hta or FP White. Yes the 8 turbo will spool like a rat on electro shock however it'll die after that magic point in the RPM band when you need it the most, regardless of fuel or cams.

I'm also assuming your running e85 part time and have a 93 tune? Here's the deal. I ran e85 when it was cheaper and had to do what most have done and lug 30+ gallons to the track with me. This was fine in TTS at the time because the power reqs were ~375 which on the stock turbo is pushing it with 93. I still suffered the lack of power after 6.5, suffered lugging all of that fuel around, and most of all running OUT of fuel when I jumped to ST. Now with TT/ST3 to do >350hp is perfect all day on 93 octane - ESPECIALLY if you go up slightly in turbo. You'll gain a flatter curve, have next to no real lag difference, and produce power all the way to 8k while keeping your torque curve for corner exit. You'll save money in the end which you desperately need to spend on suspension if Kevin and the guys are really running Penske's now. Brakes come to mind too since the Brembo's fail or taper at this level far too often.

 

Thanks hammerevo.

Balrok, I will be using dual maps for E85/93. I know it will be a bit of a pain to transport a good amount of fuel. I will be making the switch to E85 within the next month and see where that gets me, and then make a decision on where to go next. The goal for me is a BB FP Green, which I think would give more flexibility when car counts get low in class. I will begin addressing suspension/tires/aero soon as well. Not sure what coilovers to go to but I know the vettes in the region are switching to some high dollar suspensions. I plan on whiteline sb's f/r, 275 A6's, weir rear diff plate upgrade, and building a splitter w/ full undertray and diffuser as well as a wing. Brakes have also been in the back of my mind. I was able to drive Jim's (JDavenport) car in June and wow, what a difference the AP kit makes in pedal feel and pressure. Thanks for you suggestions as well

I think we should all work together to knock those pesky vettes off their throne .

Thanks everyone.

 

Seriously lol. Ok who has the cash

The green may be too much lag, as you can make TT1 power off of the thing if you're lite enough. My white should be on the car soon so i'll report back on that.

 

Hey Shaun,

Hopefully you will have another Evo joining you guys at Road Atlanta soon. We spoke a few times when I've been to the track for a NASA event, but for some reason or another I couldn't run. I've been slaving away lightening the car while building the new engine (blew it at Road Atlanta with the PCA). It's awesome to see you taking the next step. I would love to check out your ideas on front aero, I have a front spiltter/undertray in the works that has been put on the back burner due to a blown engine. I hope to see you soon at the track and I'm looking finally getting around to meeting some other evo guys in person.

cheers and good luck with the car!

Craig

 

Pretty sure the pacesetting C5's in NASA-SE (Mark and Scott) are on Penske's now in TT3.

And I agree wholeheartedly with this. The AP kit has made the brakes a worry free, hassle free system. And really cut consumables cost.

Now I have begun the process of trying to get the handling up to snuff.

 

Something I had forgotten to mention, those that have given cam suggestions would you be able to let us know what about the cam made your decision and how it has performed for you.

Balrok I wish I had the coin to go all in off the bat, as most of us wish as well lol. Let me know how you like the White as I have also considered some of the other smaller turbos FP offers.

Craig, hope you get that engine sorted out and back on track soon! I will be down at RA in September. If my job situation changes I look to compete then, if not I will be down to visit one day on the weekend. If you come by we can chat a bit about it, would love to here your ideas as well.

Jim, the AP kits feels great. The wife still rolls her eyes at me everytime I mention taking your car out.

 

Shaun on the orginal topic. My car can with HKS 272's. low to mid-range power on my Evo 9 is awesome. And if I'm not mistaken those same cams actually show better gains on the Evo 8's... Unfortunately I don't have anything to compare to. I will see if I can find my dyno plots and I can post those...if I find them lol.

Just shoot me a PM next time you head this way. I've basically dedicated this entire lost season to fully race preping the car (with what little money I have haha). Next time I'm in Greenville we need to grab a beer!

^^^this is good news!!might be taking the step towards bigger brakes myself. Stock Brembo rears?