Project 3400 Roller Cam Block (Page 59/82)
lou_dias NOV 25, 09:56 PM
http://www.hipermath.com/ma.../racing_calculations

Interesting link. I used the 2nd calculation on that page.
Plugging in 207cid and 4200 peak power (restricted neck), I only need a 50mm TB. That's probably what the stock Fiero neck flows.
Plugging in 207cid and my goal of 5200 rpm of peak power and I only need a 56mm TB.

Hopefully, the DAWG mod I am having done will be done this week and I can slap back together my 57mm setup.

At the very least, the system will be better matched up and down.
Brucepts NOV 26, 07:44 AM
Stock TB - 373cfm@28"
Bored TB - 445cfm@28"

Stock TB + stock upper - 310@28"
Bored TB + stock upper - 325@28"

Stock TB + Dawg upper - 363@28"
Bored TB + Dawg upper - 384@28"

Stock TB + Dawg upper + stock middle - 366@28" (note adding the stock middle actually increased flow or stayed the same)
Bored TB + Dawg upper + stock middle - 384@28" (humm everyone "thinks" the 90* turn hurts flow)

Stock TB + Dawg upper + stock middle + stock lower - 358@28"
Bored TB + Dawg upper + stock middle + stock lower - 376@28"


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"There is no more formidable adversary than one who perceives he has nothing to lose." - Gen. George S. Patton
http://www.flowbenchtech.com

[This message has been edited by Brucepts (edited 11-26-2013).]

lou_dias NOV 26, 08:48 AM

quote
Originally posted by Brucepts:

Stock TB - 373cfm@28"
Bored TB - 445cfm@28"

Stock TB + stock upper - 310@28"
Bored TB + stock upper - 325@28"

Stock TB + Dawg upper - 363@28"
Bored TB + Dawg upper - 384@28"

Stock TB + Dawg upper + stock middle - 366@28" (note adding the stock middle actually increased flow or stayed the same)
Bored TB + Dawg upper + stock middle - 384@28" (humm everyone "thinks" the 90* turn hurts flow)

Stock TB + Dawg upper + stock middle + stock lower - 358@28"
Bored TB + Dawg upper + stock middle + stock lower - 376@28"



This is good info to show a relation, however, an NA 3.4 at somewhere between 85%-90% VE only pulls 360cfm at 6000rpm. I am also running a ported middle and ported lower. Clearly the ported stock setup has the potential I need.
I'd love to see the Trueleo intake #'s on that same flowbench just to get the relational difference.
lou_dias NOV 28, 10:52 AM
I pick up my DAWG-modded intake on Friday! I'm excited, though I hope I don't start snapping axles again.
lou_dias DEC 01, 10:35 PM
Probably will get this installed after the holidays. Gonna do one more tune+dyno with the current Trueleo intake first.




wth? Pic looks good but uploads bad...

[This message has been edited by lou_dias (edited 12-01-2013).]

lou_dias DEC 02, 06:47 PM
Let's try another upload on a different PC:
zkhennings DEC 02, 10:32 PM
Thedrue on PFF took this a step further and increased plenum volume as well, I think you could benefit from that as plenum volume is supposed to be around half the displacement and I really doubt the fiero intake comes close with the runners included.
lou_dias DEC 03, 07:08 AM

quote
Originally posted by zkhennings:

Thedrue on PFF took this a step further and increased plenum volume as well, I think you could benefit from that as plenum volume is supposed to be around half the displacement and I really doubt the fiero intake comes close with the runners included.


If you look here: http://www.fiero.nl/forum/F...L/075502-7.html#p264
You see how much larger my tubes are than stock. This porting was done all the way thru the lower intake and heads. If you look at my dyno on page 3 and Brucepts' flow data several posts up, you'll clearly see it was the intake neck that was my restriction. The Trueleo intake gave me more plenum volume and that actually slowed down my airflow and lowered my torque by 17%. In truth, both setups were making the same power around 4900 but the Fiero intake gave me much more power prior to that rpm. It is my hope that the DAWG mod will maintain/restore my 249 ft*lbs of torque but peak at 4000 instead of 3600 and my hp curve should continue to rise past 187 rwhp @ 4150 as well.

Where larger plenum volume is beneficial is when the tubes/runners are left close to stock.

[This message has been edited by lou_dias (edited 12-03-2013).]

zkhennings DEC 03, 07:39 PM
Truello intake is easily over twice maybe three times the volume of a fiero intake, if you do not get your powerband moved up as high as you hope to I would look into it, it just seems the small area where the runners all meet would be very restrictive with the runners for cylinders 5 and 6 getting the most benefit from the DAWG mod, because even with the standard DAWG mod the cross section area of the intake where the tube meets the body is still smaller than the throttle body area

Here is a picture of his and you can see the cross section is improved a lot
lou_dias DEC 03, 10:36 PM
That looks pretty cool, actually. Hopefully I won't need it but we'll see.

Where in Massachusetts are you?

[This message has been edited by lou_dias (edited 12-03-2013).]