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

1986 GT, 5.0, 5 speed
E303 cam
Comp Cams 1.6 roller rockers
Twisted Wedge heads
Bassani equal length shorty headers
Edelbrock 65mm throttle body and spacer
BBK 70mm mass air sensor
24 lb injectors
BBK fuel rails and regulator
Stock H-pipe with cats

68keyblr said:

What transmission are you running? That's 30% loss, seems high

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c4 transmission. my stall is not right. I had a shop rebuild it and it should be a 3,800-4,000. they charged me 700.00 to rebuild and re-stall. it was stalling about 3,000 before so I just wanted to raise it a little. it only stalls to about 2,500 - 2,700 now. I called and told them and the guy said some time we don't get it right bring it in and we will try again and hug up on me. its a lot of work to pull it out. my camshaft rpm range is 4,200-7,200 but I shift it at 6,500. this calculator online says with the hp and weight it best pass should be a 10.76. so its about a second slower than it should be

331R block, Holley HP, 78/75 turbo running on 14lb spring, 120lb injectors on e85. 11r205 heads. 15° timing.
Had it tuned and then dyno'd today at HPP Racing.

793rwhp @ 5500

schwerdt1 said:

331R block, Holley HP, 78/75 turbo running on 14lb spring, 120lb injectors on e85. 11r205 heads. 15° timing.
Had it tuned and then dyno'd today at HPP Racing.

793rwhp @ 5500

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Now I just have to actually get it in boost myself. Havent gotten on it yet. Wanted to make sure it was all good first. Oh, and try and find a safe street to do so.

Nothing really exciting going on here but… more numbers. 236whp/287lbs
Mods:
Stock 302
Holley Term x
Equal length bbk headers (free)
Bbk Catless h pipe
Pre axle dumps
70mm throttle body
Explorer intake
E-fans
K&N

Car also ran 13.476@101 (right lane car was a bmw 540i)

FirstTimeFox90 said:

Nothing really exciting going on here but… more numbers. 236whp/287lbs
Mods:
Stock 302
Holley Term x
Equal length bbk headers (free)
Bbk Catless h pipe
Pre axle dumps
70mm throttle body
Explorer intake
E-fans
K&N

Car also ran 13.476@101 (right lane car was a bmw 540i)

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What rear end gears?

Rdub6 said:

What rear end gears?

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Oh right. 3.73.

FirstTimeFox90 said:

Oh right. 3.73.

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Nice!
5spd ?
13.4 is a fun little ride on the street!

These are from a few years ago, the last time I ran the car.

ETA: just wanted to update. I sold the car a couple months ago, new owner had it dyno'd and it put down 277 RWHP. Seems pretty consistent with the time/MPH

86 GT hatch, 5.0/5-speed
stock 89 shortblock (re-ring and new bearings)
96 explorer GT40 heads -F3ZE casting- with mild port and polish (cleaned up bowls, smoothed transition etc.) with Trick Flow springs
stock rockers
9333pt felpro head gaskets
TFS-1 Camshaft installed dot to dot
Edelbrock Performer EFI intake
65mm explorer TB
67mm FMS egr spacer
Stock 55mm MAF
19 lb 4hole injectors
155lph walbro pump
Cold air intake with K&N conical filter in inner fender(at time of run- stock airbox now)
Flowtech shorty headers, 1 5/8" primaries, 2.5" ball flange
off-road 2.5" H-pipe
Flowmaster 2.5" cat back
A9L computer
17* initial timing
Taurus 3.8 electric fan ( with 3G upgrade)
Stock T-5 (3.35 first gear)
8.8" with 3.73 gears and carbon fiber clutches
225/55/16 falken street tires on pony wheels.

Car should be close to stock weight, has full interior, A/C, P/S, no smog, stock sway bars are on and hooked up, stock suspension with replacement shocks/struts.
Runs were with 1/2 tank fuel and 215lb driver
Temp was mid 60's, elevation of track around 45' above sea level.

13.773 @ 101.463 mph
13.888 @ 101.574 mph

schwerdt1 said:

331R block, Holley HP, 78/75 turbo running on 14lb spring, 120lb injectors on e85. 11r205 heads. 15° timing.
Had it tuned and then dyno'd today at HPP Racing.

793rwhp @ 5500

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Did this one ever make any dragstrip passes? I would say low to mid 9's easy depending on weight.

Last year I posted a dyno and times with a stock motor and Holley terminator x. This year she got a bit of an overhaul, BUT the dyno was at 5280 feet of elevation vs the previous year at 800 feet of elevation.

Either way, pleasantly surprised with her.
All the same modifications as previously posted with:
Edelbrock intake manifold
TF 170 53cc 11r heads
AFM N41 cam
1.6 TF RR

Finally made the first test hits of the year last weekend. This was my best run. 60' and 1/8th was a bit soft but it marched out the back door.
2.9L 4 cyl. BWS300sxe 69/73 turbo. .655 solid roller cam, C4 trans w/8" Coan converter. 8.8 w/ welded axle tubes, 31 spline track lock, 4.10 gear.

Went to the Antique Drags this weekend so now I can post here.
62 Falcon 2dr 2790lbs with me in it
302 roller from an 80s Town car with dished low compression stock pistons
E4 heads, stock HO cam, Explorer intake, 19lb injectors, iron exhaust manifolds into 2" single
4R70W with a Quick2 controller.
8" trac lok with 3.00 gears spinning 195/60/14s.

10.5s @ 70ish consistently in the 1/8 mile
Made everybody else look fast

89 stock short block
AFR 165 Renegade heads
XE266HR cam
Trick Flow Street Burner intake
24# injectors
75mm TB
75MM MAF
1.7 roller rockers
BBK shorty headers
BBK off-road X-pipe with Flowmaster 40 series
3.73 gears
Lowered with stiff suspension
Stock rebuilt T-5

312 whp 342 tq

I haven't had it on a track yet, but would like to see mid 12s at least.

FirstTimeFox90 said:

Last year I posted a dyno and times with a stock motor and Holley terminator x. This year she got a bit of an overhaul, BUT the dyno was at 5280 feet of elevation vs the previous year at 800 feet of elevation.

Either way, pleasantly surprised with her.
All the same modifications as previously posted with:
Edelbrock intake manifold
TF 170 53cc 11r heads
AFM N41 cam
1.6 TF RR

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That's cool, our numbers are practically identical.

I have a similar combination on my stock '86 bottom end with the stock flat-top pistons. Mine did 314/349. I haven't had it on the track.

Bill

91 LX conv, 5.0, 5-spd, 3.73 gear set

Set-up:

• 30 over 302
• Aluminum Trick Flow Heads and Upper/Lower Intakes
• 70mm EdleBrock Throttle Body
• 80mm Pro-M Mass Air Meter
• 24|b Injectors
• MAC shorty headers
• 2.5" X-pipe (no cats) and Flowmasters
• Aftermarket chip

251 whp / 266 tq (Mustang Dynamometer)