GEN 2 yet another SPD Dyno Plot

Toadster · Jan 11, 2018

I still think the SPD adapters are doing something...
my 'before tune showed 347HP
whipple's private testing (different truck/different day, etc) shows 323HP base

Whipple Stock

My Truck Stock with SPD Adapters

that's 24HP different on baseline for RWHP

discuss!

CSJr · Jan 11, 2018

Toadster said:
I still think the SPD adapters are doing something...

discuss!

http://www.fordraptorforum.com/f261/spd-performance-exh-adapters-51365/index3.html

Gsteve · Jan 11, 2018

Those turbos are moving a ton of air at wot , theres no reason to think bigger outlets wouldnt help. I think yours did and should.

smurfslayer · Jan 11, 2018

A point of clarification:

did you dyno stock (no SPD) and then dyno with ONLY the SPD adapters?

I’m in at least partial agreement with @Gsteve, I doubt they hurt anything, but if you tuned and put the SPD’s on at the same time, we’re only guessing if they’re actually producing real world numbers.

xrocket21 · Jan 11, 2018

Gsteve said:
Those turbos are moving a ton of air at wot , theres no reason to think bigger outlets wouldnt help. I think yours did and should.

well put, its pretty simple.

Guy · Jan 11, 2018

Great to hear. I tested the adapters, I don't see them making any power difference. They're nice, but back to back, I didn't see any major gain. I do feel they are a nice option but the power is in the cal/ic/filter. On 93 or 94, in general will make 15-30rwhp more and same with torque. Its roughly a 2-4 deg spark change, all else being equal.

No reason for whipple to lie.

Far as I’m concerned. Case is closed.

Big Johnson · Jan 11, 2018

I agree with Guy on this one, if the adapters were a restriction to begin with you would see gains. But if the downpipes or any part of the exhaust are still the same diameter as the original adapters (i dont know whether they are or not) you gain zero.

kpg81 · Jan 11, 2018

I doubt these make a difference.

Downpipes with high flow cats... Definitely. In fact, downpipes are probably the only exhaust mod that would give you some decent HP. Plus you would heard the turbo spool more.

Probably sounds better than any aftermarket exhaust too, by just using downpipes only like this:

https://youtu.be/uzQFvTHAyV8

Toadster · Jan 12, 2018

Well I guess I'll take my 24 HP and be happy with it [emoji108]

Sent from my iPhone using Tapatalk

Toadster · Jan 12, 2018

kpg81 said:
I doubt these make a difference.

Downpipes with high flow cats... Definitely. In fact, downpipes are probably the only exhaust mod that would give you some decent HP. Plus you would heard the turbo spool more.

Probably sounds better than any aftermarket exhaust too, by just using downpipes only like this:

but I live in Kommiefornia

GEN 2 yet another SPD Dyno Plot

Toadster

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CSJr

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Gsteve

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smurfslayer

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xrocket21

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Guy

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