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Old 06-20-2016, 10:31 PM   #1
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Default 2.0...ish, But for REAL this time.

84.5 mm wiseco 10:1 pistons
Manley H-beam rods
supertech springs, +1 valves
00 bp4w head, ported, polished, VICS intake ran by Rpm Switch
OE crank, Exhintake from 99' bp4w
ACL bearings
Boundry oil pump
Rx8 Yellow injectors

I think that @14 psi will get me the 275 wtq(on a mustang dyno @4600' elevation) carrot im chasing. (godspeed t3/t4, cast manifold, 2.5" turbo back, MSPNP2)

Last edited by Pretending2koolz; 06-20-2016 at 10:32 PM. Reason: html prob
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Old 06-20-2016, 11:20 PM   #2
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Will an 84.5mm bored block survive 14psi long enough to break in and dyno?
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Old 06-20-2016, 11:23 PM   #3
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Will an 84.5mm bored block survive 14psi long enough to break in and dyno?
With a 2.5" exhaust and 420cc injectors? Sure.
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Old 06-20-2016, 11:37 PM   #4
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That compression seems pretty high, as well, unless this thing will be on E85.
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Old 06-20-2016, 11:46 PM   #5
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Quote:
Originally Posted by Leafy View Post
Will an 84.5mm bored block survive 14psi long enough to break in and dyno?
Only 1 way to find out!

The machinist doing the work is extremely confident. He even told me they make 85.5mm pistons if I want to go bigger. I turned down that option.
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Old 06-20-2016, 11:48 PM   #6
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Originally Posted by Pretending2koolz View Post
Only 1 way to find out!

The machinist doing the work is extremely confident. He even told me they make 85.5mm pistons if I want to go bigger. I turned down that option.
I think I confused the 84.5 as being the largest size they make instead of the 85.5. My post makes more sense with 85.5.
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Old 06-20-2016, 11:57 PM   #7
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Originally Posted by Savington View Post
With a 2.5" exhaust and 420cc injectors? Sure.
Injectors may have to get sized up I agree, but if the outlet is 2.5" there isn't a reason to go 3" the hang up is still where it is 2.5".
OOOOOOOOOOoOOOOOOOOOOOOOOOOOOOOOOOO <<<<<---------- Find the hang up
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Old 06-21-2016, 12:03 AM   #8
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Quote:
Originally Posted by Pretending2koolz View Post
Injectors may have to get sized up I agree, but if the outlet is 2.5" there isn't a reason to go 3" the hang up is still where it is 2.5".
OOOOOOOOOOoOOOOOOOOOOOOOOOOOOOOOOOO <<<<<---------- Find the hang up
You need to be a lot less stupid if you want to make big power.
I'm not even going to take the time to pick apart the rest of the posts and how flawed your logic is.
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Old 06-21-2016, 12:17 AM   #9
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Originally Posted by 18psi View Post
You need to be a lot less stupid if you want to make big power.
I'm not even going to take the time to pick apart the rest of the posts and how flawed your logic is.
I'm so bored with hearing " 3" will get you more power" to the point that I'm going to build one to show the "HUGE GAINS" that you don't get.
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Old 06-21-2016, 12:20 AM   #10
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Quote:
Originally Posted by Pretending2koolz View Post
I'm so bored with hearing " 3" will get you more power" to the point that I'm going to build one to show the "HUGE GAINS" that you don't get.
I'm so bored with every n00b that comes here thinking they can re-invent the wheel cause they can build fast cars in their dreams.

We have decades of collective experiences and knowledge to fall back on, and here you are about to change the world.

So go ahead and do it.

But here's the catch: DO IT, then talk crap and tell us all how wrong we were. Not vice versa.

I'm gonna hold my breath, I know you're good for it...........bro

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Originally Posted by Pretending2koolz View Post
84.5 mm wiseco 10:1 pistons
Manley H-beam rods
supertech springs, +1 valves
00 bp4w head, ported, polished, VICS intake ran by Rpm Switch
OE crank, Exhintake from 99' bp4w
ACL bearings
Boundry oil pump
Rx8 Yellow injectors

I think that @14 psi will get me the 275 wtq(on a mustang dyno @4600' elevation) carrot im chasing. (godspeed t3/t4, cast manifold, 2.5" turbo back, MSPNP2)
re-quoting the awesome list that will make us all eat dirt

Last edited by 18psi; 06-21-2016 at 01:17 AM.
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Old 06-21-2016, 01:08 AM   #11
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I gained about 400-500rpm of spool switching to a 3" exhaust.
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Old 06-21-2016, 01:22 AM   #12
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Quote:
Originally Posted by 18psi View Post
I'm so bored with every n00b that comes here thinking they can re-invent the wheel cause they can build fast cars in their dreams.

We have decades of collective experiences and knowledge to fall back on, and here you are about to change the world.

So go ahead and do it.

But here's the catch: DO IT, then talk crap and tell us all how wrong we were. Not vice versa.

I'm gonna hold my breath, I know you're good for it...........bro



re-quoting the awesome list that will make us all eat dirt
I guess I missed my post about how this is going to be the fastest car ever built, but hey I'm not a moderator so I don't know anything.

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I gained about 400-500rpm of spool switching to a 3" exhaust.
Earlier boost is nice, but did you actually gain power?
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Old 06-21-2016, 01:28 AM   #13
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More boost at 3500rpm = more air at 3500rpm = more power at 3500rpm... you seem kind of stupid.

No idea if I make more power up top. I'm limited by rods.

If you don't care about spool run a giant turbo and make more power.
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Old 06-21-2016, 01:33 AM   #14
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Quote:
Originally Posted by Pretending2koolz View Post
I guess I missed my post about how this is going to be the fastest car ever built, but hey I'm not a moderator so I don't know anything.
275wtq on a mustang dyno (assuming it's not calibrated to the moon) at 4600 elevation is serious power. It would have to make 316wtq on a dynojet, which means it will have to make at least that much power, usually 20 more.

Then you listed a chinacharger, a log mani, and rx7 440's along with 2.5" exhaust.
Then you tried to mouth off to andrew when he pointed out how silly that was.
You just MIGHT have been able to do that on e85, running astronomical timing and as much boost as possible in the midrange. But 440's will top out at 200 on e85, and you're not getting there on pump gas with that mod list.
So yeah......
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Old 06-21-2016, 01:34 AM   #15
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Quote:
Originally Posted by aidandj View Post
More boost at 3500rpm = more air at 3500rpm = more power at 3500rpm... you seem kind of stupid.

No idea if I make more power up top. I'm limited by rods.

If you don't care about spool run a giant turbo and make more power.
Hence the t3/t4. 3500 rpm is a long way from 7200. I guess I should have been specific in asking if you had a greater max hp/tq not limited to a low rpm application.
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Old 06-21-2016, 01:36 AM   #16
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Originally Posted by Pretending2koolz View Post
Hence the t3/t4. 3500 rpm is a long way from 7200. I guess I should have been specific in asking if you had a greater max hp/tq not limited to a low rpm application.
maximum flow is achieved at redline or maximum rpm

.........unless we're talking about diesels

I love how people with silly claims always challenge the opposing side to prove their statements.

Why don't you prove yours. Show me dyno plots back to back of a 300whp BP not losing power going from 3" to 2.5"
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Old 06-21-2016, 01:41 AM   #17
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Quote:
Originally Posted by 18psi View Post
275wtq on a mustang dyno (assuming it's not calibrated to the moon) at 4600 elevation is serious power. It would have to make 316wtq on a dynojet, which means it will have to make at least that much power, usually 20 more.

Then you listed a chinacharger, a log mani, and rx7 440's along with 2.5" exhaust.
Then you tried to mouth off to andrew when he pointed out how silly that was.
You just MIGHT have been able to do that on e85, running astronomical timing and as much boost as possible in the midrange. But 440's will top out at 200 on e85, and you're not getting there on pump gas with that mod list.
So yeah......
.....I also missed that post too I guess. I remember saying there is a good chance my injectors are going to be my week spot. BUT AGAIN...I'm just a n00b(says so under my name)
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Old 06-21-2016, 01:42 AM   #18
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here
less boost and still gained 10hp
FM2 2.5 vs 3.0 exhaust



here's more
Quote:
Originally Posted by Braineack View Post
bullshit.


my BEGI 2.25" to 2.5" DP, to 2.25" cat, to 2.25" borla exhaust

to the same Begi 2.25" to 2.5" DP, 3" cat, and 3" catback:



same dyno. same boost*.



*was getting creep, so i lifted.
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Old 06-21-2016, 01:45 AM   #19
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failfailfailfailfailfailfailfailfailfailfailyoufai lfailfailfailfail <-- can you spot the hangup?


lol

I'm going to bed
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Old 06-21-2016, 02:59 AM   #20
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Quote:
Originally Posted by 18psi View Post
failfailfailfailfailfailfailfailfailfailfailyoufai lfailfailfailfail <-- can you spot the hangup?


lol

I'm going to bed
You're getting more patient with newbs, I'm impressed!

OP- the idea that a 3" exhaust connected to a 2.5" turbine outlet is flawed. You're right that 2.5 is smaller. But if you run a 2.5" pipe all the way back, and measure the backpressure at the outlet of the turbine, and then do the same test with a 3" pipe all the way back, the 3" pipe will show less backpressure on the turbine. Less backpressure will mean a higher mass flow rate at a given boost level, thus more power and better spool. Sure going from a 3" to 8" exhaust won't make much difference for the reason you mentioned, but going from 2.5" to 3" is well-proven to be worth it.
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