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Old 10-03-2008, 03:12 PM   #1
Markus
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Join Date: Apr 2004
Location: germany
Posts: 7
Default first dyno session

Hello guys,

i tested my car the first time on a dyno last weekend. I built up this engine last winter. The engine should be a good streetable combo for my 67 fastback.

Here the data:
- 331
- scat cast crank
- scat forged i beam
- probe srs piston
- 89 roller block
- afr185 with 61cc
- comp ratio 10.7:1
- ed curtis upgrade valve springs
- ed curtis custom cam (build for torque in low to mid range)
valve lift ex. .5632 int. .5728, duration ex. 228 int. 224 @.050, lobe 112*
- comp pro magnum roller rockers
- trickflow main girdle
- 75mm pro-m mass air
- 65mm ford racing tb
- gt40 tubular upper, gt40 lower (light port matching)
- custom cold air induction
- 24lb injectors with 50 psi (27.5 lb)
- hooker long tubes, no catalyst
- 2.5 inch exhaust
- off road h-pipe
- flowmaster deltaflow 40

I make all my eec changes with the tweecer rt. Total timing was stock 26*,
air fuel ratio @idle 14.7, @wot 12.8

Measured values:
370 PS flywheel (near your HP) @ 4700 rpm
420 lb-ft @ 4500
average power 233 PS
average torque 321 lb-ft
power loss @ 4700 rpm = 30 PS (manual transmission, tremec tko)

what do you think about that numbers



Max
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Old 10-04-2008, 05:28 PM   #2
goodyear1984
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Default Re: first dyno session

it seems to be on the light side.i would have more timing than 26 unless u have a power adder
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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Old 10-04-2008, 05:32 PM   #3
goodyear1984
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Default Re: first dyno session

the only thing else that is hurting is the 185 heads with a 331 would make more power in the upper end and less in the lower i would have went with a bigger cam making power to 6000-6500
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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Old 10-05-2008, 09:59 AM   #4
Unit 5302
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Default Re: first dyno session

Quote:
Originally Posted by goodyear1984 View Post
the only thing else that is hurting is the 185 heads with a 331 would make more power in the upper end and less in the lower i would have went with a bigger cam making power to 6000-6500
The GT-40 Intake will be the first restriction to higher rpm performance. It looks like a good, healthy combination to me.
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Old 10-05-2008, 11:49 AM   #5
Markus
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Default Re: first dyno session

Quote:
Originally Posted by Unit 5302 View Post
The GT-40 Intake will be the first restriction to higher rpm performance. It looks like a good, healthy combination to me.
I think exactly the same. The GT40 is the bottle neck in this combination. A bigger cam would not make much more power but more timing would. I increased the total timing @ wot to 32 degree and i feel more power.
Like i said, this was the first dyno session without playing around with ignition and fuel delivery.
But i was surprised with the relatively high torque.

thank you guys

Markus
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Old 10-06-2008, 01:34 PM   #6
goodyear1984
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Default Re: first dyno session

naww if u were looking to have a low to mid power like u have u should have went with the 165 heads.yea the intake would be restrictive but it will run to 5500 all day.u would have made better low end numbers with the smaller head i mean come on do the math 4700 rpm with a head that runs past 7000 on a 347.
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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Old 10-06-2008, 01:37 PM   #7
goodyear1984
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Default Re: first dyno session

ps ur car looks sick,love the blue
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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Old 10-23-2008, 10:44 PM   #8
tmoss
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Default Re: first dyno session

A guy I know has a 325 stroker (yes it's a 325) with AFR 185 heads and a GT40 intake that has a fully ported lower, he dyno tested at 305HP/351TQ through an AOD and just ran a 11.85@116 in a Fox body. I bet you're going to be happy with it.
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88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).

http://www.fastlanecars.com/
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Old 10-24-2008, 12:41 AM   #9
bmxmon
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Default Re: first dyno session

I cant really comment much on your engine combo (these guys know alot more than I do) but I can say you have a sweet car! Nice work!
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Old 10-24-2008, 11:34 AM   #10
Markus
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Default Re: first dyno session

Thank you guys.
I´m very happy with the power band. The car is very very fast so i installed rear disk brakes for more stopping power and a complete opentracker roller front suspension with adjustable spax shocks.

Markus
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Old 12-18-2008, 09:48 PM   #11
goodyear1984
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Default Re: first dyno session

now that is clean
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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