turbo charged 3.4 dohc....430 rwhp!

[3400-95-Modified]

I'd hang those on my wall they are so pretty... Screw getting them covered in oil and carbon.

[RedZMonte]

Big Pimpn'!

[pontiacjeff]

WOW! What a strange coincidence you ask today, because the forged pistons just arrived after a 3 month delay ("Uhhhhhmmm, we forgot to order them...") I know this will be good news to FerrariFan!

[NateD4]

Any updates on your build?

[FerrariFan]

Update. Forged Rods from WOT tech have arrived and custom forged pistons and plasma-moly rings have been ordered. I'll post as things progress.

[SappySE107]

What fun is it unless you can crank the boost up. How much boost is too much??

Depends on how good you are at tuning, and what parts you use. Seeing as how RFRE isn't posting and none of us have done it, you are basically wasting your time with such a question. The guy that started this thread says he wants 12-15 psi. Is that not enough? Start a thread. If you haven't understood from my replies, and my PM to you, stop posting in threads about things that aren't on topic. If this was about max boost, we would be discussing his options already.

[NateD4]

What fun is it unless you can crank the boost up. How much boost is too much??

[TGP37]

The biggest mistake I read often is when people get power hungry and turn up the boost to show off. I believe an essential skill would be that of will power to resist the erroneous ideas we all have from time to time.

[SappySE107]

TGP uses a 981 hand selected crank, nothing really special at all about it.

You advance spark until power drops (use a dyno to go for max spark advance using this method, otherwise find a known safe tune and stick with it) , then back it off a few degrees. You should NEVER see detonation, especially on a boosted engine.

[timg]

Try EFI University or any of Greg Banish's books. The EFI 101 guys have been tuning for decades and Greg Banish has worked with OEMs (GM, Ford, and Chrysler and probably others) on factory calibrations.

If you want a place to start, look up MBT. Like I said earlier. If you're tuning on a load bearing dyno, most engines will reach a power plateau a few degrees before they hit knock. On something like a DynaPack, Dyno Dynamics, or even Mustang dyno, it's easy to see. If you don't mind spending the money, attending something like EFI 101 is a whole lot cheaper than blowing an engine.

Tim

[NateD4]

Its mostly a rhetorical question to someone that has all their answers in their head regardless of education or experience. If you ever read a book by an expert, you would already know how to find the best timing advance before you hit detonation, especially at the level of power we are discussing (if you forgot, this is about a 3.4 DOHC with 8-12 maybe 15 psi of boost).



You see a lot of data flying around and wonder if its real, but you have no problem telling us a TGP has a forged crank (it doesn't), it isn't a 981 casting (it is) and other shit you have only heard before. If you would shut up with your opinions, and ask questions, you might actually learn something. Telling us we aren't engineers so you don't care what we say is exactly why no one wants to discuss anything with you.

Enlighten me on the tuning question. This may be something I've never come across before. Or maybe just tell me what book to look in, I can read about it...


As to the TGP you are right (I think) in that it isn't the 981 casting. My memory tells me it had a different number on it. For some reason my memory also tells me that it was forged. BUT, that could be wrong. It might have been cast from a different alloy. I'm sure you've had one in your shop. So, if you don't mind, correct me. What's the casting number on it and what process did they use to make it?

[SappySE107]

Yes, it was mostly a rhetorical question. I don't see how you can properly tune an engine without venturing into the fringes of the tune. I certainly don't know how you know the "limit" of timing advance at a given condition without getting detonation. The question really becomes how long the engine can live at that zone or when tuning. I guess it depends on how hard you want to wring the engine out.

Its mostly a rhetorical question to someone that has all their answers in their head regardless of education or experience. If you ever read a book by an expert, you would already know how to find the best timing advance before you hit detonation, especially at the level of power we are discussing (if you forgot, this is about a 3.4 DOHC with 8-12 maybe 15 psi of boost).

I'm not trying to prove everyone wrong. I'm more interested in real information. However, I see a lot of data flying around here some of which I wonder how it is substantiated. I personally like to know where the limits of my designs/builds are. Not everyone is interested in that. But I think most people are here to learn, to exchange data and gain a better understanding of what they need for their goals, or to learn from other's mistakes. Maybe I'm wrong about that...

You see a lot of data flying around and wonder if its real, but you have no problem telling us a TGP has a forged crank (it doesn't), it isn't a 981 casting (it is) and other shit you have only heard before. If you would shut up with your opinions, and ask questions, you might actually learn something. Telling us we aren't engineers so you don't care what we say is exactly why no one wants to discuss anything with you.

[ForcedFirebird]

How do you find the edges of the engine's limits during tuning without venturing into the fine line area?

I'm not even going to humor you with an answer to that, you only seem to want to prove everyone's opinion and theory's wrong so no matter what I say you will rebuttal it again, its not worth my time.

Nate seems to think we don't know what we are doing, even though we HAVE pushed the limits of our motors. Guess we have to be engineers to know how to modify cars.

Worst part is, he's telling us what we are doing wrong, and have been doing it wrong all these years.

[NateD4]

I'm not even going to humor you with an answer to that, you only seem to want to prove everyone's opinion and theory's wrong so no matter what I say you will rebuttal it again, its not worth my time.

I'm not trying to prove everyone wrong. I'm more interested in real information. However, I see a lot of data flying around here some of which I wonder how it is substantiated. I personally like to know where the limits of my designs/builds are. Not everyone is interested in that. But I think most people are here to learn, to exchange data and gain a better understanding of what they need for their goals, or to learn from other's mistakes. Maybe I'm wrong about that...

[NateD4]

I know you know this answer, lol. More then one way to skin a ricer......

Yes, it was mostly a rhetorical question. I don't see how you can properly tune an engine without venturing into the fringes of the tune. I certainly don't know how you know the "limit" of timing advance at a given condition without getting detonation. The question really becomes how long the engine can live at that zone or when tuning. I guess it depends on how hard you want to wring the engine out.

I guess it's a personal goal of mine to tune near the fringe so I plan around worst case. I can understand not everyone does that....