• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Finally dynoed my GT40P 300rwhp combo!!

  • Thread starter Thread starter Killer95Stang
  • Start date Start date Jun 25, 2005
  • 1
  • 2
  • 3
Next
1 of 3 Next Last

Killer95Stang

New Member
Aug 7, 2003
256
1
0
Covina, CA
Jun 25, 2005
#1
  • Jun 25, 2005
  • #1
well... it has been a long project trying to hit 300rwhp with "Junkyard" GT40P heads.. but today I finally reached my goal... 308rwhp 315tq.. while floating valves at 5700-5800rpm (more on this later)... I'm gonna be honest with you.. you aren't going to make this power without doing some work to the heads.. porting, milling, ect... plus I doubt you can do it with an off the shelf cam, that still passes smog... But.. you can do it for half the price of AFR/ Trickflow type combo.. and still have a car that idles.. doesn't stall.. and has plenty of power for everyday type driving...

The cam itself was a custom, and fairly aggressive.. so some experimentation was needed to get the right balance of spring pressure, that will give reliability, and still give you the rpm you want... that is why I will be switching to some new beehives, with Titanium retainers for safety... besides, I'll probably pick up a few peak hp, and some peace of mind.....

I'll post a video of the dyno run, once I find someone to host it...

Well... here goes...
 

70lightning

New Member
Mar 30, 2005
205
0
0
in the basement makin stuff
Jun 25, 2005
#2
  • Jun 25, 2005
  • #2
Sweet I will have to look into the methods of your madness junkyard tech
 

OrangeMustangGt

Founding Member
Mar 7, 2002
1,976
0
36
Cape Cod, MA
Jun 25, 2005
#3
  • Jun 25, 2005
  • #3
holy crap man!! i only dynoed 275!!! Please tell me exactly what you did? I am really interested in how you were able to make so much more power than me! I used all stock parts, gt40p's with an off-the shelf crane 2031, and an explorer intake. I wonder.......how much was your combo.....and wow! finally someone got 300rwhp!!!!!+
 
I

igotyofire

Member
Feb 26, 2004
774
1
19
Southern California
Jun 25, 2005
#4
  • Jun 25, 2005
  • #4
cool, congradualations i guess ill say, really, are u sure this can be done for half the price of your aluminem head combo because i also if not mistaken remember u having some bottom end work done also to raise the compression(pistons?)

And where is S.T motorsports......never heard of it
 

Killer95Stang

New Member
Aug 7, 2003
256
1
0
Covina, CA
Jun 25, 2005
#5
  • Jun 25, 2005
  • #5
Here's the run down... The shortblock was balanced forged bottom end.. stock compression ratio.. Heads.. I've had them for 3 years.... but shouldn't cost more than $200 bare.. The rest of the parts like gaskets ect.. you still need to buy, so they aren't added to my half price claim...
Exhaust.. well.. I'm using longtubes, and full exhaust... I'm not saying that the AFR / Trickflow combo's aren't better, because you can gain more power with those... but for my intentions.. this was the cheapest way to reach my goals... Plus.. most people can be more resourceful, and pay less for items than I did...

Here's the major parts...
Porting by Neil Erickson = $350
Milling 0.030"= $50
valvetrain = $275 with stainless valves
Custom cam = $300
Used Edel RPM intake (ebay) = $350 shipped

So.. for $1250-$1400.. you can get all the main parts...

ST Motorsports is in San Bernadino.. its quite a drive.. but the owner is a real good guy.. plus he is a smart tuner... They were having a dyno day, so a few of made the trek to the 909...
 

donjohn

New Member
Feb 7, 2004
1,757
0
0
Irvine - Southern California
Jun 25, 2005
#6
  • Jun 25, 2005
  • #6
sweet man... the 909 has some good stuff. glad you made 300 with the p's, that's cool

the 714 still owns though
 

SN95StangMan

New Member
Jul 5, 2003
1,292
0
0
Lynwood, CA
Jun 25, 2005
#7
  • Jun 25, 2005
  • #7
Nice numbers. Hopefully you can get rid of the valve float and pick up some peak HP.

Oh and BTW donjohn, 310>714
 

donjohn

New Member
Feb 7, 2004
1,757
0
0
Irvine - Southern California
Jun 25, 2005
#8
  • Jun 25, 2005
  • #8
SN95StangMan said:
Nice numbers. Hopefully you can get rid of the valve float and pick up some peak HP.

Oh and BTW donjohn, 310>714
Click to expand...



i dunnno man, LA is a lil too wild for me
 

DFG 5OH

Active Member
Aug 28, 2004
1,341
0
36
Louisville, KY
Jun 25, 2005
#9
  • Jun 25, 2005
  • #9
does anyone have that chart that shows the flow rates of the cobra/eddy/explorer intake? I'm pretty sure that the explorer beat them all...i need this fast people! please help
 

SN95StangMan

New Member
Jul 5, 2003
1,292
0
0
Lynwood, CA
Jun 25, 2005
#10
  • Jun 25, 2005
  • #10


this one is from the FAQ section, not sure if that is what you were looking for?
 

DFG 5OH

Active Member
Aug 28, 2004
1,341
0
36
Louisville, KY
Jun 25, 2005
#11
  • Jun 25, 2005
  • #11
thanks eddie, i could've sworn that the explorer intake outflowed some othst chit. What size is the opening on the explorer intake?
 

Killercanary

The car that set the bar.
Founding Member
Nov 29, 1999
5,676
1
76
Altoona, PA
Jun 25, 2005
#12
  • Jun 25, 2005
  • #12
CONGRATS!!! I know you and a bunch of other guys have been after this for a while now. WTG!!! Its always good to see something new/different perform well!
 

mytight95

Active Member
Apr 11, 2003
2,605
0
46
Dothan,Al
Jun 25, 2005
#13
  • Jun 25, 2005
  • #13
nice job man, i am curious what headers you used, i was thinking maybe you got away with a set of rg. ones since you didn't factory that into cost....


I am prolly gonna get rid of my ported e7's before long, still debating on whether or not to go for gt40p's soon, or wait a lil longer and do the afr's

if you possibly could i am pretty curious to know what the specs of that cam are...

jason
 
W

wytstang

Mustang Master
Mar 14, 2004
4,988
4
78
Summerville,SC missing South Fl. weather :(
Jun 25, 2005
#14
  • Jun 25, 2005
  • #14
Good deal man congrats I've been following your progress.
 

94GTLaserRC

Squint as you approach, lest you be blinded by my
15 Year Member
May 7, 2002
11,178
13
89
Ernan Says "here it comes... dushbag"
Jun 25, 2005
#15
  • Jun 25, 2005
  • #15
Nice.

It's one thing to just "slap on" a Vortech and make 350+HP (me). It's another to barely make 300hp and run low 12's (Paul), and still another to just "piece" together parts and dyno good number.

Congrats!
RC
 

OrangeMustangGt

Founding Member
Mar 7, 2002
1,976
0
36
Cape Cod, MA
Jun 25, 2005
#16
  • Jun 25, 2005
  • #16
dont get the explorer intake. I have it, trust me. The top, as they test may as whell flow better than a cobra or a GT-40, BUT its the lower that sucks. I mean, physically when i was looking at my port sizes, the gt40p heads were literally 1/4 larger ALL THE WAY AROUND than the explorer intake. this is a HUGE bottleneck, and i believe why i only dyno'd ~270 RWHP. i KNOW my cam isnt the best, and would love some more specs on that custom cam above, but my biggest problem is that damn intake. Its strange that ford would take such good heads and add a smaller intake(mine is just how it was from ford, as i got a complete explorer engine)
 

Killer95Stang

New Member
Aug 7, 2003
256
1
0
Covina, CA
Jun 25, 2005
#17
  • Jun 25, 2005
  • #17
mytight95 said:
nice job man, i am curious what headers you used, i was thinking maybe you got away with a set of rg. ones since you didn't factory that into cost....


I am prolly gonna get rid of my ported e7's before long, still debating on whether or not to go for gt40p's soon, or wait a lil longer and do the afr's

if you possibly could i am pretty curious to know what the specs of that cam are...

jason
Click to expand...

I'm using normal run of the mill MAC ceramic coated LT's... They fit real well, and only require cutting 1/2" off of a sparkplug socket to remove the #6 plug... All the rest are an easy fit... oh yeah.. 90 degree boots help as well...
 

mootang

New Member
Dec 5, 2004
907
0
0
texas
Jun 25, 2005
#18
  • Jun 25, 2005
  • #18
congradulations. is that sae corrected?
 

RIO5.0

15 Year Member
Feb 16, 2001
6,892
8
128
N.H.
Jun 25, 2005
#19
  • Jun 25, 2005
  • #19
Job well done. Impresssive to say the least.. Lotta guys pay alotta more for less power...Its all in the combo..
You done well Grasshopper...
 

FastFord

Founding Member
Sep 5, 2002
380
0
0
Washington
Jun 25, 2005
#20
  • Jun 25, 2005
  • #20
Well done!!!!
 
  • 1
  • 2
  • 3
Next
1 of 3 Next Last
You must log in or register to reply here.

Similar threads

S
5.0 Rebuild
  • smittys7up
  • Nov 29, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
563
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 20, 2025
Noobz347
Resolved Fixing a GT40P Valvetrain nightmare
  • foxbodyclark
  • May 21, 2025
  • Fox 5.0 Mustang Tech
Replies
7
Views
1K
Fox 5.0 Mustang Tech May 24, 2025
limp
5
Hello Everyone !
  • 5150K
  • Jul 3, 2026
  • The Welcome Wagon
Replies
0
Views
77
The Welcome Wagon Jul 3, 2026
5150K
5
Considering widening my rear wheels, would like to verify my thoughts on fitment
  • 2000xp8
  • Jul 9, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
393
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 15, 2026
FastDriver
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
882
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?