VIPERBLUELX

iTrader: (2)

I went from stock 243's with stock gaskets to hand ported 243's with a valve job and .040 gaskets. I gained HP and TQ everywhere throughout the entire graph with no loss anywhere. Now I did also swap cold air kits, I used to have the flip-tie mod that flips the stock air box over so it sucks air from the bottom, almost identical to the Callaway Honker. I swapped to the Breathless(Vortex) ram air kit. I doubt it added any power on the dyno since those kits don't really shine till 60+mph but I wanted to throw that out there. I'm at work so I can't post the graph till I get home.

My car has always dyno'd a little lower than some Z06's but I'm still impressed with the gains since most said 15-20rwhp is the most I could gain going from 243's to ported 243's.

Vengeance suggested getting the X1 cam out of there and putting their VRX5 in and they said I'd pick up another 20-30rwhp!

Patrick G

iTrader: (14)

Nice gains. Did you do the porting yourself?

NVR KNO

Very nice.... So what were the final numbers?

VIPERBLUELX

iTrader: (2)

They were ported by Coupe Performance in Covington, GA.

Would you agree with their advice about swapping cams?

It made 387rwhp cam-only and 419rwhp with the heads.

VIPERBLUELX

iTrader: (2)

Patrick G

iTrader: (14)

I think you could benefit from a cam swap, but I don't think you'll gain 20-30 rwhp going to the VRX5 cam. Great cam, but from what I remember, it's still fairly mild. Your current power curve looks pretty good indicating sound valve events. If you went to something really big like a Vengeance Vindicator, I could see you gaining some nice power, but you'd take a pretty big hit in daily drivability. 20-30 hp is a pretty big gain when you're already running a 230 cam.

VIPERBLUELX

iTrader: (2)

Yeah the VRX5 is 236/238 .601/.605 113 LSA

He said a Vindicator is worth about 10rwhp over the VRX5 but it's gonna give up 10 down low so it's a trade-off. For a street car I'm pretty happy with the cam that's in it. For what it would cost me to do a cam swap I could put together a pretty nice nitrous kit.

Ryan L

Haha, yup.... shoot for 15-20rwhp and rejoice when you get 32rwhp.

peedeerooster

iTrader: (1)

Just to show the difference in the cams and heads for other peoples' info wanting to know. I have the TFS 215's and the smaller VRX3 in my 2005 CTSV which is alot heavier than the Z06 and it makes almost 370 ft/lbs at 3000 rpm versus your combo with a little over 325. This is just an example of matching torque for a heavier car and how the cams perform differently. I don't make that much more power up top even with heads, 450's but the build was to move the heavier car, it is a DD. It's all a trade off. Just another example of matching things up. I just thought I would post this so others could learn. Thanks. Oh, forgot to add, my dyno sheet was from the exact same dyno at Vengeance, just for comparison sake.

1ORANGEWS6

If it were mine I would be happy with the N/A results that you have now and save the money you would spend on a cam swap and put a intank Walbro and nice nitrous kit on it.

allngn_c5

iTrader: (3)

Good pick up brother. You gained everywhere and most noticebly Torque under the curve and Horsepower above 5000 rpms is awesome. (not saying under 5000 is bad, looks good everywhere) Good Swap and thanks for such a clear graph to look at.

BrianC98Z28

iTrader: (11)

the x1 is a good proven cam over the years and still lays down the #s. Id atleast take it to the track and get some e.ts out of the current setup before going and changing cams. Gotta understand, buisnesses are all out to make their money when it comes down to it. Id get some e.ts first if it were me. Should run hard in a Z06

venom ws7

iTrader: (13)

Great gains from the heads porting Congrats.

But isnt the Cam only numbers a little low from ZO6???

Ryan L

I think the head porting made up for the 'lower than average' cam-only numbers since most will never see 32rwhp gain by porting 243s over stock 243s. If he's still low, it may only be 15rwhp or so. Many on the Vette forum said my bolt-on numbers were low (380rwhp) since others with similar mods were in the 390-400rwhp range and tried to blame it on my cheaper costing headers. But miraculously, my medium size cam-only numbers are higher than some on there here with AFR heads or a FAST intake.

Why is that? Well, there are different dynos, different tuners, difference installers, different drivetrain, different weather, different correction factors, etc... Some people say 1/4-mile track times end all debate, but that's not even the case when one track is at an average of -100' DA while others are in the 3000'+ DA. What else? Track prep, driver skill, tires, headwind, etc. could be the deciding factor.

There are just too many variables in any circumstance and it's never an exact science.

At the end of the day, most of these are just daily drivers and as long at his engine is healthy and the tune is where it needs to be, dyno numbers or track times may not matter a whole lot.

VIPERBLUELX

iTrader: (2)

I mentioned that in the original post. Unfortunately I didn't dyno the car before the cam swap so I don't know if the car was a turd when it was stock or if it just didn't gain much from the cam. Either way it runs like a raped ape so I'm happy for sure.

NVR KNO

419rwhp in a 3000lb car is gonna be a beast for sure.... Be happy with that!!!

VIPERBLUELX

iTrader: (2)

Well said!

Ryan L

Did you ever make an idle vid or anything? I have the same exhaust set up as you and it sounds incredible. You can hear my idle clip by clicking on my sig pic. The mic didn't pick up the bassy tone of the Borlas, but it's better than nothing.

VIPERBLUELX

iTrader: (2)

All I have is an old clip with the Corsa catback and the car was untuned. Hope to get some good ones later.

http://www.youtube.com/watch?v=C_hyn3SiiAI

Ryan L

Sounds good! I also had Corsas in the beginning too, heh. Did you paint the lower rear bumper or is it a cover? I've been thinking about doing mine as well.