Low mph? 9.8 @ 138mph

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Nov 8, 2013 | 11:22 AM

#21

SPRAYED 01

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Here are the graphs from 10 month prior same setup up minus I didnt have the boost activated cutout on yet, it was the same dp but dumped. I verified the cutout fully opens every time though but watching it.

So in these graphs the springs are 3 years old, has harland sharp roller rockers, plug gap at .028 and 5/16 pushrods. If anything these should have a massive dip. But they look good.

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Nov 8, 2013 | 11:23 AM

#22

SPRAYED 01

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I also find it odd that I some how gains over 100 ftlbs from one dyno to the next. Both are with converter locked.

Nov 8, 2013 | 11:37 AM

#23

ajrothm

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From: League City, Tx

Quote:

Originally Posted by stock48

A head wind like that will easily knock off 2-3 mph.

+1

There is the missing 2 mph right there.. ^^^

Although for 800rwhp+, at 3800 lbs I would expect a little bit more MPH.. But it's not far off..

I'd figure out your rev issue first, then I bet the mph will follow.

Nov 8, 2013 | 01:08 PM

#24

HydroStream6

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From: Rochester, NY

ET and MPH match that stellar 60' in my book. I wouldn't worry about it too much.

I MPH a lot faster at the same ET, but my car only pulls 1.6s and I'm probably making a touch more power. I wouldn't put much weight in the dyno numbers.

Nov 8, 2013 | 02:22 PM

#25

Pro Stock John

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What's your current raceweight Alex, something like 37xx right?

Nov 8, 2013 | 02:28 PM

#26

Pro Stock John

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And gear?

I think are you in the zone.

Nov 8, 2013 | 02:38 PM

#27

SPRAYED 01

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Its like 3810 now,325 gear

Nov 10, 2013 | 04:04 PM

#28

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What bothers be is the dyno graph difference. In the speed inc dyno it pulls clear to 6300, then different dyno same exact setup same timing map it loses 800 rpm of power.

What else can wear out other then springs, push rods, spark plugs that could cause that? Weal coils?, they are heat sink truck coils.