C63_SantaFe

I have a 09 C63 and I have a carbonio intake and also the Kleeman K2 kit installed. I love the power I gained from the K2 kit. I am still losing street races that i want to be winning. Any suggestions on anything more that I can do to make my car faster. Thanks.

alqamzi

Long tube headers will let u win.

chief63

Street races against which cars?

Raleighc63

Have you dyno'd yet to see what you actually have?

C63_SantaFe

I got it dyno'd at Kleeman and i have 441 at the wheels

C63_SantaFe

I'm pretty sure that headers came with the Kleeman K2 kit. Are long tube headers different than what I got at Kleeman?

-michael-

2 OP
Please amswer this question. I would also like to know who are you losing to.
Maybe you show get some grippy tires and lighter rims?

C63_SantaFe

I lost to a modded 5.7 GTO and I also lost to a modded ws6.
I have HRE 19" wheels with Michelin Pilot Sports and they are great tires and grip very well

Raleighc63

No way you lost to a GTO. They only have 350 hp at 5200 rpm and 365 pound-feet of torque stock. What kind of mods do they have?

Did you see the dyno results? Do you have a printout?

Dads C63

I do not believe Kleeman offers long tube headers. Get MHP long tubes!
I would get the dyno sheets and see where you are.
You should not be losing to either of those cars unless they are HEAVILY modified with a strong heads and cam package or a blower or nitrous.
A strong "F-body" package can run mid to low 11's or faster so you will have your hands full. Be careful who you pick on.

citylightva

Nah, those are "High flow manifolds" you need true Long Tube headers. That's the most restricted part of these engines...

C63_SantaFe

Do you know a good company that makes long tube headers?

Dads C63

Lot of threads on the Long tube header question but the only one that has been produced in any quantity and proven to produce power is the MHP long tubes.

JM

Street Racing is a No No

Take it to your local track and get your speed out there.

Or you can end up in Jail and have the thrill of that =/

jturkel

LS1s are extremely easy to mod....extremely. and quite responsive to mods. A fullbolt-on GTO (tb, lid (intake), full exhaust (LTs, catback), tune) + gears + head/cam work result in very quick cars and lot of LS1/LS2 guys have these mods. cheap easy power.

do you know the mods on the two cars? for them to pull on you, i'm guessing full bolt on + gears + heads/cam.....MAYBE nitrous, but i honestly doubt it. the GTOs ARE heavy, but will be pretty quick nonetheless with that mod setup. anbd both have the same motor obviously, but the WS6 is a bit lighter.

like others have suggested, you need to invest in a set of long tube headers. the kleemann ones i'm sure are great quality, but there is much more power to be realized using LTs. I know MHP makes LTs for the C63 and MBH will be releasing some shortly after testing them out on a members car (should be done this week). I'm biased and say wait to see the results of the MBH headers before deciding which set of LTs to upgrade to (if this is a route you want to take). additionally, your HRE's are likely pretty heavy and may be slowing you down a bit as well.

alqamzi

I have K2 on my car and they aren't long tube.They are shorties high flow manifolds.You will gain atleast 25whp more then the kleemann.

Hans Delbruck

Losing from a dig or from a roll? If from a dig, maybe it's your launch... if on a roll, are you in the right gear? ESP off throttle management to get that power down takes some skill. Your competition might be better drag racers.........?

C63_SantaFe

Does mbh have a website? My rear 19's are lighter than the stocks.

NORCAL///AMG

If you haven't already done this....A cheap power adder is - LOSE YOUR PASSENGERS

C63newdude

It could be a number of things that all combined makes the recipe for failure:

How much do you weight?
How much your 19" wheels weight
what mode where you in?C mode?
did you have the ESP on?

I found a world of different accelerating from a roll in S mode and ESP off vs C mode and ESP on. If you didn't floored(the gas pedal) the gear selector will chose a taller gear instead of engageing the "kick down" which would put you in the more agressive gear.

Just my .2c I wasn't there. As far is the GTO 5.7, I leave them in the dust with my wife VW GLI turbo with 3"TB, tune and air filter. A stock 5.7l GTO typically trap 95-97mph here in Tucson SIR while my GLI traps 101mph.

citylightva

There are basically three LT's manufacturers I know of.

MHP - Just ask Dads about their stuff, and look at his times

Evosport - ask JRCart about their stuff, also

MBH - No real data yet, but a pretty good comparative price...

mthis

MHP tune/headers cars are all in the 11.5's or lower. and im 1 of them.
i think the fastest k2 c63 went 11.999. the same person ran 11.590 with MHP LT's.

C63newdude

^^ it still bothers me soo much that you can get a nice set of headers for a corvette(LS2, LS3 or LS7 engine) for no more than $1600-$1700(Kooks, AHR, LG Motorsports) but a similar header would cost so much for the C63 engine.

It doesn't cost that much to build them, there are soo many companies out there offering headers. The incompetent prices is what is keeping me from buying headers for my C63.

citylightva

Totally agree...That's why I'm torn between a C63 and a Z06 for my next fun car...

Even Money

If someone were to offer LTs for the C63 at 2 or even 2.5K, they would fly off the shelves....I'd buy a set right now, at that price. But the cheapest I've seen is around 4K, then you have to get the tune for that as well...