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Quick back story I see everyone saying don't do the cobra intake it will run out of air but its what I wanted so this is the results. I used Bigdogs porting because they offered me the most porting at the best price with flow numbers. He gave me higher numbers for 1/2 the price as others just that simple.

Original me asking about doing it. Stupid amount of info in this thread on intakes.
https://forums.corral.net/forums/5-0-5-8-engine-tech/2483046-363-how-crazy-am-i-cobra-intake.html

My full build
https://forums.corral.net/forums/member-build-up-projects/2484040-93-cobra-363ci-5speed-build.html


Will update this first post with all info just want have a ton of time once I get the dyno done I want have the time to write all this up so getting this part done so I can just plug in numbers. Dyno want happen Friday but am just waiting on the tuner and Dyno to free up. Maybe Saturday.

This is 2 different intakes by BigDogs porting on facebook. (Will write a review on Them after the lower on one of the intakes comes in to make sure I can give a true review) Will post a link to this thread once I do it.
Facebook page

Dart Block 363 Trick Flow 205 11R heads Long Block build by FordStroker.com (Have)
Innovators West Balancers (Have)
T-56 Magnum 1st 2.66 6th .063 (Have) Swap info thread below
https://forums.corral.net/forums/gen...l#post18584786
Drive shaft 3.5in Aluminum 2 piece slip yoke, Aluminum flange (Hanlon Motorsports) (Have)
Clutch McLeod RXT Twin Disc 1000HP Clutch (Have)
McLeod Aluminum Flywheel (Have)
Stock Air Box (Have)
Megasquirt PNP (Have)
C&L 85mm Mass air (have)
42 pound injectors (Have)
Exhaust is Mac 1 3/4 shorties and 3in pro chamber and 3in out the back. (Have) has 2.5in collector
Gears 331 (stock tire size 26in)
31 spline axels and TrueTac (Have)
255lph T fuel pump (Have)
Electric fan (Have) Mark 8 fan with DCC controller Part# FK-75
MSD 6 Plus with 2 step and timing retard (Have)

Dart SHP 363 Internal Balanced, Trickflow 11R 205 heads 66cc (Fel Pro MLS 1134 Head Gaskets). 10.1 compression
RPM 4340 crank, Scat 4340 H Beam Rods, 2618 Forged Wiseco Pistons, Wiseco's GFX ring. Motor is good for 9k rpms if I used solid lifters (I'm not) was told 7,500 with hydraulic lifters.
Custom cam for NA (Idle to 6,500rpms) Int .574 Exh .571 Dur @.050 Int 224 Exh 234 Lobe 112
Morel HYD roller link bar lifters. (5323)
Jesel shaft rockers (They only make one for the 11r heads) (KPS-470191)

Round 1 Edelbrock performance rpm intake


Mustang Dyno (Edelbrock performance rpm intake)
Max 368hp 5,190rpms 409tq 4,217rpms From TB, With stock air box and 90 it made 367hp 5,104rpms 412tq 4,191rpms.

WOT is at 32deg tried 33.5deg and just like others have said 32deg is the sweet spot.

Round 2 (test are ran with 3/4in nitrous spacer unless specified otherwise)(TBs are ported by Bigdogs porting all but the 90mm TB)
Stage 2 upper Cobra intake 75mm TB (lowest port #6 289 CFMs Average 293cfms)
(Lower intake is the stage 3 with lowest port #5 334 CFMs Average 340cfms)

Max ?hp ?rpms ?tq ?rpms From TB, With stock air box and 90 it made ?hp ?rpms ?tq ?rpms.


Stage 3 upper Cobra intake 80mmTB (lowest port #2 323 CFMs 330 Average cfms)
(Lower intake is the stage 3 with lowest port #5 334 CFMs Average 340cfms)
Upper and lower together flowed an average of 326cfms

Max numbers (Best test)

Max ?hp ?rpms ?tq ?rpms From TB, With stock air box and 90 it made ?hp ?rpms ?tq ?rpms. (have a 3/4in spacer that is ported by Bigdogs porting for max #s)

150 shot Nitrous (Best Test)
Max ?hp ?rpms ?tq ?rpms From 90mm TB,

Test 1
70mm Accufab TB (942 cfms) With stock air box and 90 way I will drive it everyday.
?hp ?rpms ?tq ?rpms

150 shot Nitrous
?hp ?rpms ?tq ?rpms From 70mm TB, With stock air box and 90 it made ?hp ?rpms ?tq ?rpms. Way I will drive it everyday.

90mm Accufab TB (1369 cfms) Intake only has 80mm opening it flows 1070cfms
?hp ?rpms ?tq ?rpms

65mm Stock TB Bigdog ported (872 cfms)
?hp ?rpms ?tq ?rpms

TB cfms info

Cobra Intake info this is my stage 3
326cfm average bolted together
80mm opening it flows 1070cfms
MCSA 2.45sqin
Average runner length 12.75in



1053528

IMG_3798.jpg
69363313_521404208690219_8682518637904396288_n.jpg
 

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Hopefully your build and the exposure of the level of porting that can be done to factory parts can open some eyes. Many felt the Bigdogs ported Cobra was not a good match and that's because they did not understand how far and what a good porter can do. The Bigdogs Stage 3 ported Cobra actually flows a substantial amount more air than the out the box aftermarket manifolds it compares to. We provide before and after flow results on our porting to show our customers exactly how much flow they've gained with our porting. For more examples and details on prices you can message us on our Facebook page at Bigdogs Porting.
 

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Discussion Starter #4
Time and weather isn't doing me any good. Looks like with my work and vacations with family we are going to try for Dec 13th-16th if not it will be January. Look its going to happen I'm not even bring the car home I told the tuner to keep it till we dyno it just have to find time.
 

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Discussion Starter #5
Everything looks like a go for Sunday stay tuned. If I don't post Sunday night I will Monday morning.

Anyone want to take a guess?
 

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looking forward to it!
 

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Everything looks like a go for Sunday stay tuned. If I don't post Sunday night I will Monday morning.

Anyone want to take a guess?
Bout time lol. Yeah my guess is it's going to make more hp than the home ported Rpm but since the Stage 3 ported Cobra's runner length was shortened and flow more than what your cam and 2 5" header collectors can support rpm wise it will make less low end torque. Now when you put the stage 2 ported upper on it will make more power everywhere but still your motor will not max that out either.
 

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Looks like a good, solid combo. Can't wait to see the new numbers. I hope you are pleasantly surprised.

My cam is very similar on paper to yours-- how's the tuning / driveability with the megasquirt?
 

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Looks like a good, solid combo. Can't wait to see the new numbers. I hope you are pleasantly surprised.

My cam is very similar on paper to yours-- how's the tuning / driveability with the megasquirt?
I’ll kinda touch on the ms. The op and I have similar setups save for a Few cubes. The ease of tuning with the megasquirt is nice. Coming from binary editor it’s definitely much simpler to get going. As far as driving goes it’s great, I’d do it all again.
 

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The suspense is killing me! :eek:

I'm curious after reading the first part and now this and have a couple of questions for Big Dogs. All this talk about who's porting flows more than the other.

If the intake outflows the heads; is there any benefit to having the extra flow?

Maybe I missed it while reading all of the ported Cobra data, but what does your Stage 2 and 3 Systemax ll lower flow?
Upper bolted to lower?

How about the old RPM1 intake lower? Bolted together?

Videos, pics or recorded data?

I own both intakes so I'm truly curious.

Thanks.
 

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I'll guess 391/428 on your DD setup but, what do I know, I can't even come to a conclusion on my own build. Good luck!
 

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405/407 that’s my guess


Sent from my iPhone using Tapatalk
 

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The suspense is killing me! :eek:

I'm curious after reading the first part and now this and have a couple of questions for Big Dogs. All this talk about who's porting flows more than the other.

If the intake outflows the heads; is there any benefit to having the extra flow?

Maybe I missed it while reading all of the ported Cobra data, but what does your Stage 2 and 3 Systemax ll lower flow?
Upper bolted to lower?

How about the old RPM1 intake lower? Bolted together?

Videos, pics or recorded data?

I own both intakes so I'm truly curious.

Thanks.
It doesn't work like how most think it does. Rule of thumb is you want your manifold to be able to flow at least 30cfm more than your heads and your TB much flow more then your manifolds TB tunnel and your Intake tubing, maf and air filter all should flow more than your TB, intake manifold tunnel in order to allow the heads to do g their thing. Same thi g goes for your headers, exhaust pipes a d mufflers. They all have to flow enough so where there is NO restrictions. Any restrictions means loss of power. Tuned intake runner length to the combos rpm range for the 2nd and 3rd order adds a 7% and 5% boost in flow flow the static flow rate.
Our stage 2 ported Systemax 2 can flow 310cfm bolted together and our stage 3 Systemax 2 can flow OVER 340cfm bolted together. Our stage 3 ported Victor 5.0 flows over 360cfm bolted together. Those and much more Info are on our Facebook page at Bigdogs Porting. We show you before and after flow results on many of our customers parts.
 

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It doesn't work like how most think it does. Rule of thumb is you want your manifold to be able to flow at least 30cfm more than your heads and your TB much flow more then your manifolds TB tunnel and your Intake tubing, maf and air filter all should flow more than your TB, intake manifold tunnel in order to allow the heads to do g their thing. Same thi g goes for your headers, exhaust pipes a d mufflers. They all have to flow enough so where there is NO restrictions. Any restrictions means loss of power. Tuned intake runner length to the combos rpm range for the 2nd and 3rd order adds a 7% and 5% boost in flow flow the static flow rate.
Our stage 2 ported Systemax 2 can flow 310cfm bolted together and our stage 3 Systemax 2 can flow OVER 340cfm bolted together. Our stage 3 ported Victor 5.0 flows over 360cfm bolted together. Those and much more Info are on our Facebook page at Bigdogs Porting. We show you before and after flow results on many of our customers parts.
Thanks for the reply. I don't do FB. Sorry to the OP for jamming your thread. I just had to ask.
 

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It doesn't work like how most think it does. Rule of thumb is you want your manifold to be able to flow at least 30cfm more than your heads and your TB much flow more then your manifolds TB tunnel and your Intake tubing, maf and air filter all should flow more than your TB, intake manifold tunnel in order to allow the heads to do g their thing. Same thi g goes for your headers, exhaust pipes a d mufflers. They all have to flow enough so where there is NO restrictions. Any restrictions means loss of power. Tuned intake runner length to the combos rpm range for the 2nd and 3rd order adds a 7% and 5% boost in flow flow the static flow rate.
Our stage 2 ported Systemax 2 can flow 310cfm bolted together and our stage 3 Systemax 2 can flow OVER 340cfm bolted together. Our stage 3 ported Victor 5.0 flows over 360cfm bolted together. Those and much more Info are on our Facebook page at Bigdogs Porting. We show you before and after flow results on many of our customers parts.
Thanks for the reply. I don't do FB. Sorry to the OP for jamming your thread. I just had to ask.
You really should get on There just to check out our page. ALL of your questions answers about our porting results are there. You can also see our videos on YouTube as well.
 

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What a tease! All the thrill, all the drama, a guy gets all worked up, and then when he's right on the edge, ready for the big climax, what happens? Thread goes all limp, oh the humanity!

Jay
 

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My guess is 383hp at 5500rpm and 412tq at 5200rpm.
 

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Discussion Starter #19 (Edited)
For some reason with this new setup it want let me edit the first post. Thats the #1 problem I have with the new setup. Some I can some I can't.

Little write up at the bottom (One Thing to point out is this wasn't done on the same hard tire it was done on a 315/35r17 MT S/S drag radial This cost me 10-15hp on the dyno and this is a Mustang Dyno)No videos yet but will post one at a later date.

(Weather) the concrete was sweating We Dynoed from 1:30-5:30 and made 9 full pulls.

IMG_4374.PNG

IMG_4377.PNG


Mustang Dyno (Edelbrock performance rpm intake)
Max 368hp 5,190rpms 409tq 4,217rpms From TB, With stock air box and 90 it made 367hp 5,104rpms 412tq 4,191rpms.

WOT is at 32deg tried 33.5deg and just like others have said 32deg is the sweet spot.

Round 2 (test are ran with 3/4in nitrous spacer unless specified otherwise)(TBs are ported by Bigdogs porting all but the 90mm TB)

Stage 2 upper Cobra intake 90mm TB (lowest port #6 289 CFMs Average 293cfms)
(Lower intake is the stage 3 with lowest port #5 334 CFMs Average 340cfms)

Max 367hp 5000rpms 425tq 3985rpms From TB, (This was with the aftermarket ported spacer from BigDog)
IMG_4387.jpg


Stage 3 upper Cobra intake 80mmTB (lowest port #2 323 CFMs 330 Average cfms)
(Lower intake is the stage 3 with lowest port #5 334 CFMs Average 340cfms)
Upper and lower together flowed an average of 326cfms

Max numbers (Best test)
Max 396hp 5484rpms 419tq 4405rpms From 90mm TB, (have a 3/4in spacer that is ported by Bigdogs porting for max #s)
IMG_4386.jpg


150 shot Nitrous (Best Test) (This needs some more time jet was wrong and stayed rich 11.4-11.8 so will retest in a few months) You can see in graph when it went fat I got out of it and then decided to get back in it this just is a starting point.
Max 546hp ?rpms 665tq ?rpms From 90mm TB,
IMG_4383.jpg



Test 1
70mm Accufab TB (942 cfms) With stock air box and 90 way I will drive it everyday.
376hp 5500rpms 405tq 4400rpms Didn't get RPM but you can see on graph I typed it in incase photo ever goes away
IMG_4376.jpg


150 shot Nitrous Skipped this for now
?hp ?rpms ?tq ?rpms From 70mm TB, With stock air box and 90 it made ?hp ?rpms ?tq ?rpms. Way I will drive it everyday.

90mm Accufab TB (1369 cfms) Intake only has 80mm opening it flows 1070cfms
387hp 5300rpms 424tq 4300rpms Didn't get RPM but you can see on graph I typed it in incase photo ever goes away
IMG_4379.jpg


65mm Stock TB Bigdog ported (872 cfms)
?hp ?rpms ?tq ?rpms (Didn't see the point and didn't have time if the 70mm lose power it would have just lost more point is you need bigger)

Make sure to see how flat and nice the curves are with the HP and TQ. That is one thing that really stood out with the intake.

Anyone who has ever dynode a car before knows how when you put the car under a load you can just hear its under a load the car never sounded like that. The motor is like what else you got its just super cool how different the old motor and this one sound under a load.

The car is really good tuned we made a 395hp run and tried for 400hp and got that 396hp so its just not going to get 400hp the way it sits with that weather.

Now in a few months when I it may get the 400hp if its better weather when I take it for the nitrous pulls.

Everything BigDog said has been true from what The numbers has said, I do think and I maybe wrong that he thought the Stage 2 would have done better but maybe I'm wrong but No way around it the stage 3 made 30 more hp. That was the last 2 passes that was back to back comparisons. I added the bigger spacer and made 396hp then swapped to the stage 2 intake and made 367hp

My nitrous plate is a restriction. Cost me 9hp and 300rpms +or-

Due to my shaft rockers I have to have a spacer no way around it or I would have done a test with the shorter runner. That would give me more RPM/HP. I will write a full review on BigDog once I get my lower that he still has but. The one thing that needs to be known for this is. I had asked him to 100% max port the stage 3 make the runners as short as he could don't need to prove this but I do have this in a message. He seen my build and left some runner and didn't take it all because he didn't know I had a spacer on my car. So the 1in he took out is the 3/4in I added and thats why the RPMs are more like the stock cobra intake if he would have took out the extra 1in-1 1/2in I may have seen 6000-6500rpms. I get that he thought he knew what I needed to get me the best power but thats not what I wanted I wanted 100% max so I could compare the Trickflow Box down the road being it has the higher RPM and I knew I had to have the spacer. So at this point it cost me RPM/HP. The point being if you are looking at doing a stage 3 you can get a higher RPM then me if you get him to take more of the runner out. Again I will write a review later and yes this to me sucks but I still sent him my other intake (That had already been ported) to have his stage 2 done to it so the work he does is still great. (I do recommend his work 100%) I also haven't complained to him about this so for all I know he may say send it back and I'll fix it.

The tuner, owner of the dyno, Bigdog and many others have all said the exhaust is costing me some power most say 10-15hp and the tires is another 10-15hp on the dyno and its a Mustang dyno I've never meet anyone who doesn't say you will see bigger #s on another brand dyno. Over all thats good enough for me. I will most likely add exhaust down the road but this car is a blast on the street and I'm very happy with it if I add exhaust it will be to make it quieter thats it. So like 1 3/4 LT with 3in H pipe with 2 1/2 catback will have cutouts for track and dyno runs.

Also keep in mind the cam. I'm very happy with the cam but bigger more aggressive cam and bigger exhaust the stage 3 intake could make more power. In no way on the dyno this time did we feel like the intake was maxed out like we did with the (Edelbrock performance rpm intake) I personally think the stage 3 can make more power

I do want to say that if Bigdog says you will see 30hp and 300rpms believe it everything we have talked about off line has been spot on.
 

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Wow! You are making serious power. The stage 3 and stage 3 with spray is very impressive even on a mustang dyno which many say show lower results than a dynojet.

i would imagine that 450 could be had with the bigger exhaust, 56cc heads, 6500 rpm cam and the stage 3 intake all while looking like a cobra should.

honestly, I wouldn’t change a thing and just enjoy it.

trade you a box r your stage 3;)
 
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