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Old 08-22-2005, 20:33   #1 (permalink)
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Dyno Results

We made 3 pulls with my truck tonight. I was arguing with the dyno operator on how high to rev my truck up. He wanted to take it to 5500 max but I was like no, it needs to go up to 6500 for sure.

So on the first pull he stopped at 5700 rpms. It was still climbing but only gave a reading of 276.4 and torque peaked at 253.4 ft lbs @ 5500 rpms. A/F ranged from 11.8-12.4 throughout the run.

On the second pull, it was a back to back pull, it was running a little warmer than normal. He only pushed it to 6100 on this pull and it made 260.3 and was still climbing when he backed off. Torque was 235.5 @ 5700 rpms. The A/F was between 11.9-12.6.

The third pull, we turned the timing down from 36 to 32 and let it cool back down to 180 degrees. It made 252 hp @ 6000 and 219 ft lbs @ 5800 rpms. The A/F was from 12.1-12.6.

They put a couple hundred pounds of weight in the back of the truck but it was still spinning the tires on the rollers. He told me that he doesn't spin hyd tappet engines over 6,000 because they just collapse and lose power. I'm not so sure that these were the right results. He was even kinda confused about it.

BUT....Please watch the video and see how it put load on it. He didn't just stand on it, he would slowly bring the power up, hold it, then bring it up some more, and hold it, then bring it up the final time. He was doing it in like 10 mph increments or something. I might check into another local dyno and see if I can get one pull from them just to see.

They third dyno run: http://www.supermotors.org/vehicles/....php?id=237210
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1982 F100 2wd-408c CHI 3V 225cc Heads, 3v Intake, Pro Systems 1000+HP carb, 260/266@0.050 w/ 0.694/0.697" lift solid roller, JPT Rollerized c6 and 5000 rpm converter, 4.86 gears and S&W Ladder Bar kit with QA1's all the way around.
7.976@89.90 mph 1/8 mile with lots of bounce - with old engine and suspension(should be greatly improved)
1982 F100 408c 3v
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Old 08-22-2005, 20:58   #2 (permalink)
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Re: Dyno Results

If i was you i would take it to someone that knows what they are doing. I knew the YANKS couldnt get it right . You need to send it over here to get it dynoed. .
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Old 08-22-2005, 21:46   #3 (permalink)
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Re: Dyno Results

Yeah, I'm wondering if it was conducted correctly. We were guessing it would lose roughly 30% through the drivetrain. That would mean the engine is only makin about 360hp at the crank. There is NO WAY that that is all its makin. A couple other guys were there watching they were wondering if he even had it floored once. My dad had his 01 F350 with a 7.3 diesel in it there too and it never really smoked or bellered. Its like he just played with the throttle and watched the mph. I'm still really doubting those results.
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1982 F100 2wd-408c CHI 3V 225cc Heads, 3v Intake, Pro Systems 1000+HP carb, 260/266@0.050 w/ 0.694/0.697" lift solid roller, JPT Rollerized c6 and 5000 rpm converter, 4.86 gears and S&W Ladder Bar kit with QA1's all the way around.
7.976@89.90 mph 1/8 mile with lots of bounce - with old engine and suspension(should be greatly improved)
1982 F100 408c 3v
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Old 08-22-2005, 22:49   #4 (permalink)
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Re: Dyno Results

Just out of curiosity ,what did those 3 runs cost. If you are close to a drag strip i would run the truck a couple times and see what it does. There are some online calculators that can tell you based on weight and the 1/4 mile mph a pretty close idea of rwhp. i have had the opportunity of knowing the hp of a few engines off the shop dyno and then run down the strip and these calculators are not perfect but damn close. I really expected more from your setup than what your getting, and just like goin to the doctor were free to get a second opinion :). Keep us updated.

On a side note im running a 400 .060 over, roller cam, 11:1 on propane with dual mixers and puttin down 270 so im thinkin maybe this guy could be lacking in experience. In the end we dont drive daily on a dyno so gett that bad boy to the track ,its the only real yardstick worth a pinch.

BTW was that open headers in the video
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Old 08-22-2005, 22:57   #5 (permalink)
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Re: Dyno Results

Quote:
Originally Posted by Socketman
Just out of curiosity ,what did those 3 runs cost.
He charged me 100 bucks for the 3 pulls.


Quote:
Originally Posted by Socketman
BTW was that open headers in the video
Nope, that is dual 3" mandrel bent pipe with a pair of Borla XR-1 Sportsman mufflers with 3" tailpipes that are also mandrel bent. She has a bark to her when the rpms are up there. They said it was about as loud as the open header vehicles they test.
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1982 F100 2wd-408c CHI 3V 225cc Heads, 3v Intake, Pro Systems 1000+HP carb, 260/266@0.050 w/ 0.694/0.697" lift solid roller, JPT Rollerized c6 and 5000 rpm converter, 4.86 gears and S&W Ladder Bar kit with QA1's all the way around.
7.976@89.90 mph 1/8 mile with lots of bounce - with old engine and suspension(should be greatly improved)
1982 F100 408c 3v
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Old 08-23-2005, 00:41   #6 (permalink)
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Re: Dyno Results

It sounds a bit down, but i still think stall convertors can cause this too. But if you have a real "super honest" dyno with no bullshit thrown in, you may be up near on the money. I'm not a hydraulic fan at the best of times, and a solid may of made all the difference. Ask Mark at MME that ground the cam, as they are renowned, and could give some answers.
I have a decent setup, alloyheads, solid cam, Demon carby and recent dyno with TFC manifold and all it made was 303rwhp. And with the right convertor, will run a high 11.
I wouldn't be too worried, as you know whats in yours, and by looking at whats in there, it definatly has the goods, regardless of what the chassis dynos tell you. I bet its a handfull
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Old 08-23-2005, 01:35   #7 (permalink)
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Re: Dyno Results

Quote: Originally Posted by Socketman
Just out of curiosity ,what did those 3 runs cost.

He charged me 100 bucks for the 3 pulls.


Did you BLOW hard .
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Old 08-23-2005, 03:16   #8 (permalink)
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Re: Dyno Results

I saw those scary burnout vids on your last combo and it definitely looked/sounded like is was putting out more that 250rwhp then......so it has to be more now? or was that the same combo?

He seems to be pussy footing around on the dyno though.
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Old 08-23-2005, 04:37   #9 (permalink)
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Re: Dyno Results

i have been on 3 different dyno's and my car has had something like 15 pulls and not one of em sounded like that. It wasn't completely crap, just sounded weird how he keep't pausing... almost like he was tunning and watching some logging...
I wouldn't think holding in stages like he did would do very go for you AF also?


also agree with trublu, i remem the vids, they sounded alot more than that rwhp reading compared to what I have seen anyway.
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Old 08-23-2005, 08:19   #10 (permalink)
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Re: Dyno Results

Quote:
Originally Posted by crochunter
Quote: Originally Posted by Socketman
Just out of curiosity ,what did those 3 runs cost.

He charged me 100 bucks for the 3 pulls.


Did you BLOW hard .


Actually, that is his going rate. He charges 50 for the first pull and 25 for each pull after that.

Quote:
Originally Posted by TruBlu351
I saw those scary burnout vids on your last combo and it definitely looked/sounded like is was putting out more that 250rwhp then......so it has to be more now? or was that the same combo?

He seems to be pussy footing around on the dyno though.
The combo is basically the same except for the addition of Borla XR-1 Sportsmans, a 950 HP Holley, and an exhaust evacuation system. The dyno operator does a lot of roundy-roundy engines so I'm wondering if he did my engine like one of those engines. He checks them at certain rpms in the upper range to see what they do in that range, so did he do that to mine? If its only 276 rwhp, I'd really be scared to drive something that was in the high 300 to low 400 rwhp range. But, I guess I'll be looking for a different dyno.
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1982 F100 2wd-408c CHI 3V 225cc Heads, 3v Intake, Pro Systems 1000+HP carb, 260/266@0.050 w/ 0.694/0.697" lift solid roller, JPT Rollerized c6 and 5000 rpm converter, 4.86 gears and S&W Ladder Bar kit with QA1's all the way around.
7.976@89.90 mph 1/8 mile with lots of bounce - with old engine and suspension(should be greatly improved)
1982 F100 408c 3v
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