Anyone Running Stock Internals? 350+

[drummerboy1864]

So I was wondering how many of you are actually running a big turbo build still on stock internals. I have about 3 1/2 grand put aside for my build. I want to run a GT3076, FMIC, TIP, Fuel pump internals, with a Cobb Acessport. I hoping to get those for 3.5k
I already have the CAI and DP. But im worried Im going to damage my internals... I cant decide if i want to wait untill I have 4.5k saved up to get pistons and rods.

So who is actually running stock internals pushing 350+whp? From what I have been hearing thats about the breaking point most people hit with stock...

And would it be a bad idea to run this turbo build with the stock internals, and just keep the turbo around 18-20psi.. untill I can put in forged internals?

[Dmurray06]

My bet is 350 ish is safe for stock internals. Over 400 an it's touch and go. I know there are tons of people on stock internals and ~350.

[802MS3]

big turbo stock block thread

[m4tic]

You are not damaging the fuel pump... You just reach its flow limit

[Nefarion]

@m4tic wrong internals. OP means Rods and Pistons...not fuel pump internals

[drummerboy1864]

Originally Posted by m4tic You are not damaging the fuel pump... You just reach its flow limit

not worried about damaging the fuel pump. But I assume running a big turbo build... my fuel pressure is gonna drop to like 900... :-( cant have that

my only worry is really bending a rod pushing ~350~

[Dmurray06]

Originally Posted by drummerboy1864 not worried about damaging the fuel pump. But I assume running a big turbo build... my fuel pressure is gonna drop to like 900... :-( cant have that my only worry is really bending a rod pushing ~350~

Once you get pump internals, your pressure will hold strong.

[m4tic]

Reading comprehension < me

[drummerboy1864]

Originally Posted by m4tic Well wtf.. We need different terms... We should just say rods when referring to engine guts

Im just wondering if anyone is having issues with stock rods pushing over 350whp and about what point do our rods start bending

[m4tic]

they start bending when your tune starts sucking. detonation, low rpm high cyl pressure and unchecked boost (hi boost on stock map sensor for example) kills engines.

[StayBroke]

I say around 380 to 415 on a very solid tune will last decent miles. Im running a gt3076 so just look at my thread time to time. When i get done with my tune i will post vdyno numbers and you can get an idea.

I also have been told that keep up with your maintenance and you will be good to go.

And one more thing, you really want have to worry about load down low as in full boost on a reg 3076r will be around 3800 to 4000rpm.

[kmac]

Nope, stock internals. It can't be done.

[G26]

I wouldn't push over 400whp on my own ms3 on the stock internals. When my oem turbo goes, I will replace it with either a bnr 1 or bnr 3, amd maybe push a max of 350whp.

[travis9935]

So pretty much below 2000 rpm 100% throttle is what the main reason for rod carnage is from? Why don't Mazda use stronger rods? Genone & genpu both?

[6oost3d]

I had stock internals and dynoed 380 whp with a gt3076 drop in, it ran fine. After adding timing and e85, a rod shot out through the back of the block and another piece of it through the oil pan. I guess 380 was good haha.

[ClutchEngaged]

Originally Posted by travis9935 So pretty much below 2000 rpm 100% throttle is what the main reason for rod carnage is from? Why don't Mazda use stronger rods? Genone & genpu both?

Because it would most likely push the price up to more than they are willing to sell it for. It fits into a nice niche segment at the current price, and that is Mazda's goal.

[Pu Manchu]

stock motors blow so i think mazda pushed the envelope too far even at the stock power levels. i detuned my car for this reason.

[RichieRichness]

400 seems to be the breaking point. However, @superskaterxes was pushing 430+ for a while before his went boom.

[EdgeAutosport.com]

I dunno guys Ive been over 450 for 25k for a long time and I beat the shit out of my car. With a solid tune a good maintenance there is nothing to worry about

[RichieRichness]

Originally Posted by eric@edgeautosport I dunno guys Ive been over 450 for 25k for a long time and I beat the shit out of my car. With a solid tune a good maintenance there is nothing to worry about

yeah I was referring to the MS6 awhp. However, it may be the tq numbers to look out for.

[EdgeAutosport.com]

Originally Posted by RichieRichness yeah I was referring to the MS6 awhp. However, it may be the tq numbers to look out for.

yup exactly I was putting down 439wtq but again its all about the tune and we know you know your shit

[StayBroke]

Originally Posted by 6oost3d I had stock internals and dynoed 380 whp with a gt3076 drop in, it ran fine. After adding timing and e85, a rod shot out through the back of the block and another piece of it through the oil pan. I guess 380 was good haha.

I am assuming you have a ms6, if so i would have been happy with 380 awhp.

On a ms3 i still believe around 400 is a decent spot to be around.

[mituc]

There was another guy with stock internals pushing like 500+whp at 30PSI with some E85 mix (dturbo I think was his nickname). But this discussion is only about numbers, and pretty much all the people think only about more power when start tuning and ditch comfort, drivability and reliability in the closet.
If you're concerned about your stock rods I'd say to consider a more efficient setup with a 3071 turbo or similar. 3076 spools too late (3800-3900'ish) and you will run out of RPM's just when starting to make good power. A 3071 spools around 3200-3400 (mine spools around 3350), so you'll still be in the safe area with better driveability.
If you switch to forged and lighter rods then a 3076 or a gt35 makes much more sense IMHO.

[kmac]

Any mazdaspeed making over 400 whp on a stock block is on borrowed time It's only a matter of time before it pops. I'm lucky that's all there is to it.

[Realgib3]

Originally Posted by mituc There was another guy with stock internals pushing like 500+whp at 30PSI with some E85 mix (dturbo I think was his nickname). But this discussion is only about numbers, and pretty much all the people think only about more power when start tuning and ditch comfort, drivability and reliability in the closet. If you're concerned about your stock rods I'd say to consider a more efficient setup with a 3071 turbo or similar. 3076 spools too late (3800-3900'ish) and you will run out of RPM's just when starting to make good power. A 3071 spools around 3200-3400 (mine spools around 3350), so you'll still be in the safe area with better driveability. If you switch to forged and lighter rods then a 3076 or a gt35 makes much more sense IMHO.

This is ridiculous post full if misinformation. "Run out of rpm when u finally get into power on a 76" hahaha

[6oost3d]

Originally Posted by StayBroke I am assuming you have a ms6, if so i would have been happy with 380 awhp. On a ms3 i still believe around 400 is a decent spot to be around.

Yea its an ms6, I think it was putting down 372 for tq. 380 is fun..

[ColonR]

Originally Posted by drummerboy1864 So I was wondering how many of you are actually running a big turbo build still on stock internals. I have about 3 1/2 grand put aside for my build. I want to run a GT3076, FMIC, TIP, Fuel pump internals, with a Cobb Acessport. I hoping to get those for 3.5k I already have the CAI and DP. But im worried Im going to damage my internals... I cant decide if i want to wait untill I have 4.5k saved up to get pistons and rods. So who is actually running stock internals pushing 350+whp? From what I have been hearing thats about the breaking point most people hit with stock... And would it be a bad idea to run this turbo build with the stock internals, and just keep the turbo around 18-20psi.. untill I can put in forged internals?

i was running that setup almost exactly but with a catless dp etc and was making about 350awhp so about 400 crank and it was running like a champ

[mituc]

Originally Posted by Realgib3 This is ridiculous post full if misinformation. "Run out of rpm when u finally get into power on a 76" hahaha

The idea was more like, why have only 2.5k rpm to play with when you can have 3k or more? On stock rods you're going to limit the boost at some point anyway, and both these turbo's can boost up to that point in the last 3rd (at least) of the rev range.

[m4tic]

Oh you'll need my EWG manifold if you want to run boost that low on a 3076... Otherwise you'll creep to 24-25 psi.

[EdgeAutosport.com]

http://www.mazdaspeedforum.org/forum/foru...al-way-111319/

[Pu Manchu]

Originally Posted by eric@edgeautosport http://www.mazdaspeedforum.org/forum/foru...al-way-111319/

...trade it for a 5.0?