Guess My H P !!! - The Dyno & 1/4 Mile Time Thread

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A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,770
2,400
194
Illinois
#83
I pm'd. Didn't want to derail to much lol.
 

RangerJoe

I leave the horn on while driving
5 Year Member
Apr 26, 2010
2,439
1,082
174
Georgia
#84
No dyno for new combo, but I do have a time slip.

-Home built, stock block 331, 10.7:1
-AFR 185'so OOTB w/ LS style valve springs
-FTI cam, 227/235 .613/.588 111.5
-HSM2 with 70mm Race Accufab and 80mm Pro-Mike
-AFM Big tube Shorties
-AC & PS intact
-No tuning
-3360lbso race weight

-7.45 @ 91.88 MPH leaving off 2 step @ 6,000 rpm. Online calculators show 364.5 rwhp.

Joe
 

a91what

I plan to eventually problem is time
Mod Dude
Apr 6, 2011
6,292
3,765
204
29
Hillsborough county
#85
Here's my sheet, the supercharger puked it's guts during the pull (front seal). I think it has more potential but we will see.

306. 9.3:1
Gt40 3 bar heads home ported
Funnel Web
50lb injectors
Eaton m90 10psi -- 6psi by 5k rpm
E303
75 and 65mm throttle bodies
Blue oval shortie headers.
Alot of stock clutch slippage.
1485479450819-1738631381.jpg

That's 386tq 282hp.
 

Jason 302

10 Year Member
Aug 9, 2003
685
70
68
34
Newark, Ohio
#86
Curious what my 1/4 times will be now that I put some 255/60-15 Mickey Thompson S/S drag radials on the car.
Car made 479rwhp and 473rwtq and ran 12.268 @ 119.35 on super cheap 245/45-17 radial tires last year. Any guesses?
Iq2wAYA.jpg

C5rkmH4.jpg

DTTKE6E.jpg

8r0bac5.jpg
 

A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,770
2,400
194
Illinois
#87

85_SS_302_Coupe

it sucks (I know) to be on the receiving end
10 Year Member
Nov 11, 2003
6,926
1,568
223
38
Northern KY
#88
I've got one for you guys.

My old combo was:
347, I think around 9:1 because of deeply dished pistons and large factory combustion chambers
'69 C9OE 351W heads, ported and polished by hand (very well done) 1.90/1.60 valves
AFM N-91 cam
Wieand Stealth intake
Holley 650DP
Full length headers, etc etc.
Made 362/364 at the wheels

New combo will the the same except for:
AFR Renegade 185’s, 58cc chambers to hopefully bump that compression up
Edelbrock Victor Jr intake
Pro Systems 780cfm carb

Whenever I get around to finishing it. I'm actually concerned that the new heads won't make much more power. The old heads were ported by a wizard. I also kinda expect to lose torque or not make much more but gain peek HP.
 

A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,770
2,400
194
Illinois
#89
More compression will raise both hp and torque. With aluminum heads you should be able to add more timing. Also the bigger valves,and I assume more efficient ports,etc, should make a more efficient motor. The intake/carb combo will probably lower lowend a little but again you'll probably make more avg power imo.
 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end
10 Year Member
Nov 11, 2003
6,926
1,568
223
38
Northern KY
#90
A broader curve is always a win. I'd love to break 400 at the wheels but I dunno about that much gain based on how well the ported heads did. But, I know the cam is worth more than its' surrounding parts so hopefully higher flowing heads/intake/carb will let it eat.
 

89stang1

Stroked and Juiced
5 Year Member
Nov 5, 2008
731
233
74
nj
#91
Apr 5, 2017
3
2
13
25
#92
1987 hatch
Last year best pass DA was 8200 ft @ albuquerque drag way.
311 ci
Ttrim vortech @11lbs
E85
C4 automatic stage 3 kit
3600 stall
28 micky Thomson drag radial

60ft...1.63
330...4.61
1/8...7.13 @97.3mph
1/4... 11.18 @120.13
 
Last edited:
Sep 2, 2016
52
2
8
24
#93
1986 mustang GT 5.0
Ford racing cobra upper/lower (ported)
Port matched Edelbrock performer heads
Comp xe270hr cam. w/ 1.73 dss rockers
Bbk 70mm throttle body
75 mm MAF
Msd 6al black box
3.55 gears
Zoom clutch
Wc T5

Guess my HP!!
 

25thmustang

10 Year Member
Sep 5, 2003
2,024
84
99
33
Montgomery, NY
#94
25thmustang


Stock Shortblock
Stock HO Cam
GT40 Valves and a valve job
1.7 Roller Rockers
Cobra Intake
65mm TB
Pro M 75mm MAF
Mac LT Headers
VRS O/R X pipe
Spintech Catback
AFPR, Pulleys
FMS Aluminum DS
Stock suspension

272 rwhp/ 316 rwtq

Can't believe I didn't mention track times. The car actually dynoed 256/295 when it ran its best times.

12.53 @ 107 on 17" ET Streets
12.95 @ 109 on 18" Street Radials
 

ZachMorris

Active Member
Jun 21, 2017
149
17
28
29
#97
I need some tips here boys...

I went to the track last weekend and ran a 14.1 @ 101....having troubles getting traction on 245 street tires and waiting for some slicks.

92 Notch
Balanced Bottom End
Comp custom cam 218in/220 ex degree .512/512 lift/114 lobe centres.
FMS HD Timing Chain, Comp Cam Dual Valve Springs
Edelbrock Performer Aluminium Heads 1.94/1.60 valves
New Multiangle valve job, Exhaust ports blended from CNC port opening into runners
Extrude Honed Ported
FMS Blue Roller Rockers and roller lifters.
Cobra Intake Manifold
FMS 65MM throttle body, 24lb injectors. C&L 73MM
Headers, straight H pipe, UD pullies and all other small goodies.
31spline axles, Auburn HD diff and FMS 8.8 rear end 3.55 gears
KYB Adjustable gas shocks, megabyte lower control arms.

The 14.1 happened on a very hot night with a few passes....was running almost 15's before trying to get traction. I'm going again tonight and hoping to break into the 13's....its a MUCH cooler night but im worried about traction.

Any tips?
Should i deflate the tires a little?
 

a91what

I plan to eventually problem is time
Mod Dude
Apr 6, 2011
6,292
3,765
204
29
Hillsborough county
#98
That seems very slow for what you have there.... deflate the tires a bit run around 30lbs unhook one side of the front swaybar. Try again.
 

ZachMorris

Active Member
Jun 21, 2017
149
17
28
29
#99
That seems very slow for what you have there.... deflate the tires a bit run around 30lbs unhook one side of the front swaybar. Try again.
That's what I'm going to try and I'll post the results. I was leaving around 1800rpms spinning a little bit off the lane and a little into second. Shifting at about 5k
 

A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,770
2,400
194
Illinois
That's what I'm going to try and I'll post the results. I was leaving around 1800rpms spinning a little bit off the lane and a little into second. Shifting at about 5k
Raise your shift point. That cam and 3.55 years should like around 5500rpms. Also try riding the clutch out of the hole a little bit. Don't use the water box in the burnout area. Just give a quick little spin of the tires to clean them. Then stage. If you're just worried about a time don't worry about cutting a light. The timer doesn't start until break the beam. Just concentrate on staying in the tire groove going down the track(you should be able to see it) it will be the stickiest area for you to gain some traction. Make clean shifts and write down everything you can i.e. Air temps,tire pressure,shift points etc etc.

Also make sure you're running good fuel and as much timing as you can(should be around 14* adv). Most importantly have fun