74u

iTrader: (9)

I can't believe these power figures are that unreliable...yet so many educated, experienced folks participate in the dyno section.

In my case I was pointing out my TEA CNC's Trickflows are clearly being out powered & out torqued by worked stock castings.

74u

iTrader: (9)

If that's the case why is everybody so impressed (myself included)?

Rise of the Phoenix

iTrader: (27)

Your attributing everything to the heads. I'm sure your cam is different than the OP's cam. Do you have the exact same intake setup, do you have the exact same valve-train setup, is your exhaust setup exactly the same as the OP's, do you have the exact same rear-end as the OP, is your gear ratio the same, are you running the exact same size wheel/tire, did the same person tune both cars, etc. Do you see what I'm saying? Unless EVERYTHING else is equal, you can't make a bold statement like that. It may not be your heads that are limiting your setup. It could be a wide variety of things. Too many times people only thing in terms of the heads or cam as to why the setup didn't do what I expected it to do. A lot of the time it comes down to the small things. From my many years of being on here and looking at the setups that make killer numbers on the dyno and lay down fast as **** ET's on the strip, all of them have one thing in commons. They all have well thought out builds. Not just some high end heads and a big *** cam, but all the little things like a lightweight valve train setup, a correct matched intake setup, a great headers/exhaust combo, and spot on tuning.

MMorgan9812

iTrader: (6)

Great numbers!

74u

iTrader: (9)

Well, this idea is makes more sense than your last (it was the dyno's fault originally). But you've made some assumptions that need clearing up.

I already stated this car has a "substantially larger" cam in my original posting...mine is a custom grind 239/246...not some random donkey stick.

This combo has a stock 102 vs my 92 with lightly ported runners & throated to 95mm. Not a BIG difference in power here...most vendore I have talked to think I could be leaving 10 rwhp behind compared to a 102.

This combo has a potentially better (thicker) push rod setup.

Both combos are within half a point on SCR.

Both have 1 3/4" headers. Mine makes less power & torque through the exhaust, and open headers.

The guy who set the fuel & timing for a WOT pull shouldn't make that big of a difference either, but for what it's worth my tuner is highly reputable.

We can split hairs, but the fact is this combo makes more power & more torque everywhere. Mine has high dollar aftermarket castings, and his ported stockers are beating me up.

Interesting fact: My last combo (404) was making more power with Partiot ported 243's, less compression, and a bit larger cam...all other supporting mods are the same. Something is wrong with this...most every knowledgable vendor who has looked at my car, or I've discussed my combo with seem to think the heads are to blame.

Rise of the Phoenix

iTrader: (27)

I still think your car and the OP's car being dyno'd on different dyno's is a big factor. As others have posted, there can be a variance of up to 40 HP difference between dyno's. In this case, maybe not 40 HP difference, but it could be substantial. If both you and the OP can provide information from some track runs, that would be a far better tool for comparing power. I'd venture to say that your trap speed and the OP's trap speed won't be that much different.

74u

iTrader: (9)

He is in a vette, I'm in a 4th gen so it would be hard to compare traps I think.

Both have m6 w/4.10's - I'm going to bet he is on a larger tire - mine are 275/40/17's.

My car weighs 3720 with me in the driver's seat and went 92mph in the 1/8th mile on the stock size street radials. Less than perfect traction but there isn't much left MPH wise even on a perfect run. This is a couple MPH slower than my 404 w/Patriot 243's.

I hate to waste money beating a dead horse but it would be interesting to dyno at Corvette World since I'm local.

Sales@Tick

iTrader: (3)

Ehh, I don't really like "internet records" especially when it comes to dyno numbers. E.T. slips get me going more so in that regards than spinning the rollers. Although I feel this combination would run exceptionally well at the track.

Let me know how the V does!
I hate you had the issues you have had with your combination. I know there is something holding it back. Did you ever feel like maybe taking me up on my exhaust offer? It still stands 100%.

My cost on the parts, you cover shipping. Let's see if we can't get some more power out of that thing.
LS3 block.
Got it!
This is true and I preach it a lot. That said, 74u's issues have been public knowledge on this forum with his dyno thread.

I'm not sure if you posted in it or saw it, but it definitely didn't make the torque or HP anyone expected.
Give Frank a call and tell him I sent you. See what happens at least.

Rise of the Phoenix

iTrader: (27)

I'll have to take a look back at his dyno thread. It sounds like you kind of know what's going on and are trying to help him out.

74u

iTrader: (9)

I really appreciate the offer and would have taken you up on it months ago but I just haven't had any significant money to throw at it. While it missed the mark from a performance standpoint - the car has been my daily driver since completed and it runs good/reliable...so I'm stuck waiting.

I'm probably looking at tax refund time before I have enough extra cash to make a play.

With that in mind - everything sitting on top of the shortblock is on the table. Full exhaust upgrade is a given, but maybe some different heads? Worked 243's, or...??, maybe a 102 upgrade just to rule it out? My goal still is100mph in the eighth/125mph in the quarter on my street rubber. I just don't think I'm going to get there on an exhaust upgrade alone.

Also looking at gearing that may be more suited to my street tire/high MPH goal.

Sales@Tick

iTrader: (3)

I understand completely regarding the monetary issue, this hobby isn't cheap for most blue collar families and working men/women.

Before completely giving up on your heads and throwing in the towel, if you feel like it I'd highly recommend sending them to someone like Chris@Frankenstein Racing Heads for an evaluation.

He could quite possibly be able to find the proverbial needle in the haystack in regards to your power loss issues.

Tuskyz28

What do yall think it will make at the flywheel?

Sales@Tick

iTrader: (3)

This engine?

Goosecaddy05

should be around 640 crank if its in the 535-545whp range

oreobadr

I know what I am doing for my next build haha impressive numbers!! do you have to run race gas?

Rise of the Phoenix

iTrader: (27)

No need for race gas on this combo. Only time you have to run race gas is if the compression ratio is really high.

sergo

good to see Livernois 243s getting it done.
i don't feel so bad about having 3R heads on my 402.

Sales@Tick

iTrader: (3)

No race gas needed on this combination.

sbf

martin.is there a way we could get the same power without 660 lift cam.i have tea stage 2 heads and the springs are only 650 lift,now if i have to change springs i would but the pac 1207x are 700 lift how would these springs do with alot of milage.i see someone put it should be 640hp@fly wheel thats really stout. martin what u think

kinglt-1

iTrader: (26)

awesome setup! I am looking to do a similar build.