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Tell me what looks fucked up in that graph? You said early peaks and lazy curves but seeing as how the horsepower peaks around 6200 rpm and peak torque is around 5000 rpms I don't see anything indicating that cam that is off a tooth or anything like that. It peaks in all of the right areas and the curve looks appropriate for an unlocked dyno pull, the power is a bit low but that could be a bunch of different things non of which could be the tuners fault. Making horsepower is easy, add timing until it stops making power and make sure your a/f is correct and what else can the tuner do to make power? The tuner himself came on here and backed that up.
And you have a good tuning reputation? You're telling me that build should peak at 6200RPM? Really? Setups identical or extremely close to it litter this site (I have one of my own), and when no mechanical/electrical/tuning problems exist it should peak around 6800 with minimal power drop to 7000-7100, and without the lazy curves. That engine is done making power 700-800RPM too early.
Last edited by Marc 85Z28; 06-18-2018 at 10:54 AM.
And you have a good tuning reputation? You're telling me that build should peak at 6200RPM? Really? Setups identical or extremely close to it litter this site (I have one of my own), and when no mechanical/electrical/tuning problems exist it should peak around 6700 with minimal power drop to 7000-7100, and without the lazy curves. That engine is done making power 700-800RPM too early.
My reputation speaks for itself, can't say the same for you. Every MS3 cam that I've seen WITH AN UNLOCKED STALLED AUTO (more than I can count over the years) has peaked around 6200-6300 rpms and made peak torque right around 5000-5100 rpms. If it was a tooth off it would be way earlier than that as I've seen people install them wrong as well. If his is off by a hundred RPM or so then that's not indicative of a problem since every combo and car is different. As far as a lazy curve goes have you ever seen a curve with an unlocked torque converter? It looks exactly like this graph does too.
FWIW ,, some of what you guys are describing is a tuner vs a builder that knows how to tune.. There is a difference..
Many many dyne guys are well schooled in the software and understand the running engine but they do depend on the builder having put something together correctly (Nothing at all wrong with this but there are limits.) they have to make some assumptions..
An experienced builder has his "hands on" experience working engines both in the shop and at the track to back up his efforts tuning the engine on the dyno.
My reputation speaks for itself, can't say the same for you. Every MS3 cam that I've seen WITH AN UNLOCKED STALLED AUTO (more than I can count over the years) has peaked around 6200-6300 rpms and made peak torque right around 5000-5100 rpms. If it was a tooth off it would be way earlier than that as I've seen people install them wrong as well. If his is off by a hundred RPM or so then that's not indicative of a problem since every combo and car is different. As far as a lazy curve goes have you ever seen a curve with an unlocked torque converter? It looks exactly like this graph does too.
I strongly suggest you read my post that you quoted again. Let me know when it sinks in.
Just got back from the dyno and am completely disappointed. Did the tuner mess up or is this all I am going to get? A4 car
parts list:
fast 92 w/ speed density and slp lid
fast fuel rails
42lb injectors
2.5 5.3 prc Texas speed heads
ms3 cam 238/242
1 3/4 headers straight piped
it does have a loose converter
dyno shows 347hp & 340 torque
Couple of questions.
Can you post a copy of Dyno Sheet that shows the entire pull in one picture, not just cutaways.
You say 1 3/4" header, straight pipe, what dia is that straight pipe?. I'm also assuming that per your description, you do not have TD exhaust.
Also, what is the max CFM (flow rating) of intake filter? Could you post a picture of intake system?
Can you post a copy of Dyno Sheet that shows the entire pull in one picture, not just cutaways.
You say 1 3/4" header, straight pipe, what dia is that straight pipe?. I'm also assuming that per your description, you do not have TD exhaust.
Also, what is the max CFM (flow rating) of intake filter? Could you post a picture of intake system?
3" pipe, was on the car when I got it but I believe it's a custom setup. I can't find a make or model on it.
not sure on the cfm on the air filter
I have a slp lid on it. I also have the fast toys 98mm lid that I didn't put on it. That thing is a pos, can't believe what I paid for such a shitty piece of plastic that doesn't fit worth a ****.
Last edited by Road_House; 06-19-2018 at 08:26 PM.
Something seems a bit off.
I had AFR 205s, Ms3, ported Fast 90, 1 3/4 headers, ss4000 stall, dumped ypipe, mti lid and stock 98z28 maf lay down 435 hp at 6700rpm with a Locked converter. Unlocked was right at 400hp.
Do you know the minnum CFM of intake air you need to support the needs of the Cubic inches of your engine? If not you need to figure out CFM.
Now once you know minimum intake CFM air. Then you need to figure out it that 3.00" exhaust pipe can flow that at least minimum of air. Right now you have a 4.0" air intake tube, with 3.00" exhaust tube, fed by 8 1 3/4 inch tubes into 2 probably 3.0" collectors, "Y" piped into that 3.0'" exhaust tube, with an XXXX muffler that may or not be a flow problem too.
I asked to see the entire dyno sheet so I could verify RPM TQ laid down right at start of pull. As best I can tell TQ only came up 0.9th, where it nosed over before it even got to 5525 RPM on an engine your trying to pull to 6XXX+ RPM.
TQ started it's downward spiral right after it's high point xxxx RPM . TQ never varied over 0.9, before starting it's downward before it even got to 5225 RPM where HP/TQ cross.
Then due to lack of HP to help that loose converter do it's job, it did it's job as best it could with no help from engine, until that slip dip in HP at XXXX rpm.
Am I right or wrong?
Is the Turner the problem? Not for me.
Last edited by poorhousenext; 06-20-2018 at 08:25 AM.
id look into the converter. made a big difference for me. did u getcthe car to the track yet? thats what i would do. see how it performs. specially being the car was dynoed on an unlocked converter
06-18-2018, 10:35 AM
And you have a good tuning reputation? You're telling me that build should peak at 6200RPM? Really? Setups identical or extremely close to it litter this site (I have one of my own), and when no mechanical/electrical/tuning problems exist it should peak around 6800 with minimal power drop to 7000-7100, and without the lazy curves. That engine is done making power 700-800RPM too early. 
