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New numbers :(

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Old Dec 18, 2005 | 09:14 AM
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Default New numbers :(

Well I'm dissapointed with the new numbers, but I have a feeling there is something wrong with the engine. When I had the headers off there was some oil in the exhaust port. So today I'll be doing a leakdown test to see if there is anything wrong. When I get some more money I'll be putting in some new lifters and cleaning up the heads. We will see what happens. I'll probably go to NLP or REVX on a dyno day and get some new numbers. Here's the graph. Numbers are 373rwhp 367rwtq

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Old Dec 18, 2005 | 10:23 AM
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I thought 370ish was respectable for a cam only 224 setup???

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Old Dec 18, 2005 | 11:05 AM
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Yeah, those numbers look OK. Not stellar but on par.
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Old Dec 18, 2005 | 11:07 AM
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i saw the car on the dyno. that 110 lsa cam is definately odd. you went smaller so it was expected that you made less power. it would help if you posted what you made with teh other cam to explain why you are disapointed.
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Old Dec 18, 2005 | 11:12 AM
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^Yes, didn't he run a 231/237 with crappy #'s?

Anyhow, the lower lift and 110 lsa are definately making this more of a tq. cam.
I'm sure it's fun to drive.

Let us know how the test results turn out.
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Old Dec 18, 2005 | 12:57 PM
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You're numbers aren't bad at all. I'm not sure what you were expecting, but it shouldn't have been much higher than what you got.
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Old Dec 18, 2005 | 01:18 PM
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like said above the # dont look bad.. the oil in the exhaust is prolly blow by.. do you have an upgraded PVC system or a catch can..the oil is comon on these motors. hell when i did my ls6 intake upgrade the factory on was like poring oil out of the ports when i took it off and set it on the ground...and if there is oil in the combustion chamber then that could hurt the #s a lil bit ..i say sea foam it and put a AMW catch can on it..just my .02 thow
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Old Dec 18, 2005 | 01:32 PM
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Well guys here's a few things to answer some of the questions. First of all, the blue line is the 231/237 cam. This was dyno'd before the ported throttle body and asp pulley. I switched to the 224 and added the above mods. Also I seafoamed the engine and changed the plugs. Now one plug I know was not up to par with the others. It was a plug I had taken out before because I had cracked one. However, I don't think that is the problem as the plug looked good. This isn't exactly cam only. The heads have work done to them, but the work is an unknown as me or the previous owner didn't know anything about them. When the previous owner swapped the ls6 intake in he noticed the intake ports had been ported some. As did I when I took the manifold off. Honestly I was hoping for something similar to this.



Now this guy has the same mods as I do. I know you can't directly compare two cars, but I didn't expect there to be 30rwhp and 40rwtq missing. If I hadn't of seen that graph and gotten the cam spec'd the same as he, then I wouldn't be upset at these numbers at all. I'm not too concerned with the numbers as the car feels faster and is much more fun to drive. However, I'm more trying to diagnose why I've got 30/40 missing from a person with the same mods and cam as me.
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Old Dec 18, 2005 | 08:25 PM
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could be all fueling, if you're dumping enough oil in the exhaust it wiil skew your O2 sensors and create havoc with trimming...i know the AFR looked pretty decent but the oil will also skew a wideband to the rich side....i dont know if it's worth 30 horses but it will make a difference...good luck
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Old Dec 18, 2005 | 08:36 PM
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Could it be possible that the heads are "hogged out"? (you did say you didn't know the specifics on the "work" done to the heads)
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Old Dec 18, 2005 | 09:19 PM
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Well I haven't taken these heads off. From the looks of things, it looks like a nice job. However that doesn't mean it is I guess. I never got around to doing the compression test. In fact I'm pretty tired of working on the car. I'm going to deal with it and just do it later. I'm so busy I can barely function. I'm was going to school full time. Working 24 hours a week. We are re-doing our house. So I am texturing the walls and painting. Just finished school so now I'm working full time and trying to get things ready for UF. Just had a full week of crap with my car. Plus it's Christmas, so things are always hectic. Oh well...not really looking for pitty just trying to vent a little
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Old Dec 19, 2005 | 09:07 AM
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You may have already posted this info but what is your:

Head brand?
Runner size (CCs)?
Valve size?
Chamber Size?
Gasket thickness?

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Old Dec 19, 2005 | 09:46 AM
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Originally Posted by SideStep
You may have already posted this info but what is your:

Head brand? perimeter casting
Runner size (CCs)? no idea
Valve size? no idea
Chamber Size? no idea
Gasket thickness? stock graphite (or so it appears to be)

I'm really wanting to take these things off and put some new lifters in and see what's up with them. Possibly even get some different heads. However, I don't have the money right now and I really just want to save up for a new engine. Forged 347 with a d1sc. Almost the same exact setup that "conan" has.
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Old Dec 19, 2005 | 11:29 AM
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I think your missing some in the tune. I put down 375/375 with a so-so tune, 224 w/.563 112 lsa
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Old Dec 19, 2005 | 12:30 PM
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I doubt the tune is off. This guy is supposedly the best tuner in Florida.
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Old Dec 19, 2005 | 01:14 PM
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was it dyno tuned on a mustang dyno? a dynojet isnt really a tuning tool other than WOT. Theres a big difference, I've seen it.
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Old Dec 19, 2005 | 01:19 PM
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No, it's a dynojet. He does WOT tuning on the dyno, and the other tuning on the street. IIRC
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Old Dec 19, 2005 | 01:20 PM
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that could be part of it, honestly without "logging under load" how can you get the tune perfect? You also have 410's which will account for slightly lower numbers as well. I went from 375/375 to about 440/420 with a head swap and mustang dyno tune. No way I picked up 65hp and 45 tq with just heads. I say about 20 of that is in the tune.
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Old Dec 19, 2005 | 01:30 PM
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Well I wasnt there but if he logged on the street then he did a lot better than most with a dynojet. How much time went into the street logging? Honestly I think your only off by about 12-18 hp maybe if that. tr says 390hp out of its 224/224 and I explained my results. You have different lobes and and only slightly more lift with your cam but its a 110 lsa as well.
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Old Dec 19, 2005 | 01:50 PM
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Ok well my tuner just called me since I never got to talk to him saturday. He said he could smell oil when he was running it on the dyno so that could account for some of the problem. So I'm going to do some troubleshooting there. Probably do something about the pcv and see where the oil is leaking in from. I don't know what it is, but I'm almost willing to be it's the valve seals. I'll do some tests and see what's going on. I'm hoping it's nothing serious.
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