There's 10 minutes of my life I'll never get back......

Got to learn to use the scan feature.Took me less then minute and half.

I'm talking about the poorly tuned engine and pretty much useless information.

They were excited about blowing stuff around in the dyno room though...

definately not equal to your engine guy

scratch them off the list of potential engine builders...what a mess!!

Only interesting information is it somewhat confirmed what I have known that Zoomies kill some horsepower. Looked like about 140 here on that one.
I did not even see a set up to get rid of any of the exhaust. Crazy, Dyno room needs to have large pipes to get exhaust out of the dyno room and fresh air in.

On a low HP, poorly tuned deal like that, I'm not surprised at a loss of HP.

That being said I wonder why all T/AD, TA/FC and blown Pro Mods run zoomies if there is power to be had with collector headers.........

quote:

Originally posted by "The Bender":
....... blown Pro Mods run zoomies if there is power to be had with collector headers.........

We don't want anymore bottom end power ...... got almost all of the timing out now.





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quote:

Originally posted by "The Bender":
On a low HP, poorly tuned deal like that, I'm not surprised at a loss of HP.

That being said I wonder why all T/AD, TA/FC and blown Pro Mods run zoomies if there is power to be had with collector headers.........

And big time nitrous cars

It can be a big adjustment to carb jetting when going from collector headers to zoomies. The zoomies kill the draw signal as far as carbs go. I did an A-B-A test involving headers at the track. From a best tune w collector headers, I had to add 8 jets to return performance to the same level with zoomies. Were the runs the same.....no. The launch was softer due to a lack of torque w zoomies, but the engine ran better down track with 1 more MPH at the quarter. The reason that blown engines run zoomies is that they have a supercharger and most are running either a power adder or fuel injection and at not dependant on a carb signal. They are looking to clear the most exhaust possible. In fact, adding extra torque at the bottom makes the car harder to manage.

quote:

Originally posted by 329L:
And big time nitrous cars

Same answer as above ........ 5 3/4" stroke motor needs no bottom end help.



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quote:

Originally posted by XPS fan:

quote:

Originally posted by "The Bender":
....... blown Pro Mods run zoomies if there is power to be had with collector headers.........

We don't want anymore bottom end power ...... got almost all of the timing out now.





.

I agree, same here, if I didn't pull timing I wouldn't make it 10ft

A mild blown engine such as in the video will be better off with collector headers, A "real" race engine, not so much.....

BTW the flames out of the headers at idle were a dead giveaway of the poor tuning of that engine......looks cool for use in a wheelstander though........

quote:

Originally posted by "The Bender":


That being said I wonder why all T/AD, TA/FC and blown Pro Mods run zoomies if there is power to be had with collector headers.........

BTW Fred, this was a rhetorical question

......and you guys scared the #$%& out of me with this thread. Just received a Nelson engine for a customer turnkey build...







DIFFERENT NELSON ......... thank goodness !







.

quote:

Originally posted by "The Bender":
BTW Fred, this was a rhetorical question

I'm a little slow ......... please use this in the future







.

quote:

Originally posted by XPS fan:

quote:

Originally posted by "The Bender":
BTW Fred, this was a rhetorical question

I'm a little slow ......... please use this in the future







.

Too many race gas fumes?

quote:

Originally posted by "The Bender":
On a low HP, poorly tuned deal like that, I'm not surprised at a loss of HP.

That being said I wonder why all T/AD, TA/FC and blown Pro Mods run zoomies if there is power to be had with collector headers.........

Rick Santos built a set of collector headers for his many time world championship TAD and ran them a few races. It was just as fast as the cookies, but he ultimately went back to the cookies, I dont know why, but I'll try to remember to ask him next time I talk to him. I wouldn't doubt it was more a convenience thing then a performance thing since it was just as fast with either.

I know of a few blown pro mods that run/ran collector headers and made just as much power, the only thing they said was that the lack of front end downforce from the zoomies pointing up made them very unstable down track.

quote:

Originally posted by Will Harrison:

quote:

Originally posted by "The Bender":
On a low HP, poorly tuned deal like that, I'm not surprised at a loss of HP.

That being said I wonder why all T/AD, TA/FC and blown Pro Mods run zoomies if there is power to be had with collector headers.........

Rick Santos built a set of collector headers for his many time world championship TAD and ran them a few races. It was just as fast as the cookies, but he ultimately went back to the cookies, I dont know why, but I'll try to remember to ask him next time I talk to him. I wouldn't doubt it was more a convenience thing then a performance thing since it was just as fast with either.

I know of a few blown pro mods that run/ran collector headers and made just as much power, the only thing they said was that the lack of front end downforce from the zoomies pointing up made them very unstable down track.

Put a set on the B/ED (single 4 barrel 358 cu in, 917hp) 13 years ago or more.. looking to kill some torque. It did! A dimes worth! Never got them within a dime tuning. Would need a cam and gear change.

Probably too much tire shake on tad.
Wouldn't last long.