H/C cars inside..
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
H/C cars inside.. What is the big secret? I asked this question a long time ago and a few responded.. What does everyone see when they check their MAF Rate at full throttle with 28lb injectors? This is not a tuning question. I want to know what H/C cars are seeing.. We have cars that dyno from 380rwhp to 455rwhp on 346ci H/C cars.. The MAF Rate has to be relevant. I hear that for every 10lbs/min = 10 rwhp or something like that.. If this is remotely true then it would be interesting to see how much the high horsepower cars are taking in.. Thanks in advance..
TECH Senior Member
Joined: Nov 2001
Posts: 10,341
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Re: H/C cars inside.. I tried logging the flow rate today but ATAP crashes with an error when I try to play back. I will download the newest version and install it tonight. On a good note it was fun doing a WOT run in third to 7000rpm <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />
Cheers,
Chris
ps when comparing this data it will be good to know the gear, rpm, rear axle gear, and weather.
also a stock MAF must be used (screened stock MAF preferrably as a descreened stocker like I have will show slightly less reading)
<small>[ November 12, 2002, 03:58 PM: Message edited by: Chris ARE 360 ]</small>
Cheers,
Chris
ps when comparing this data it will be good to know the gear, rpm, rear axle gear, and weather.
also a stock MAF must be used (screened stock MAF preferrably as a descreened stocker like I have will show slightly less reading)
<small>[ November 12, 2002, 03:58 PM: Message edited by: Chris ARE 360 ]</small>
!Dial-up Director
Joined: Nov 2001
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From: Louisiana
Re: H/C cars inside.. I will have to check for that one day. I used to get "MAF High Frequency" codes all the time when I had ported MAF ends but with the stock descreened ends I do not.
Justin
Justin
Thread Starter
Joined: Nov 2001
Posts: 8,259
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From: Valrico, Florida
Re: H/C cars inside.. This stems from another post made by Chris.. MMS reported that Chris should be seeing between 42 and 48lbs I think.. I want to know if this is the norm..
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TECH Junkie
Joined: Jan 2002
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From: At the office
Re: H/C cars inside.. Above 6K rpms at WOT, I was only seeing between 37-41 lbs..
Traffic was out of line today, so I only got to go WOT in 1st and 2nd gear.
I'm not sure how much of a difference there would have been in 3rd and 4th gears. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I have a stock MAF sensor.
<small>[ November 12, 2002, 07:41 PM: Message edited by: verbs ]</small>
Traffic was out of line today, so I only got to go WOT in 1st and 2nd gear.
I'm not sure how much of a difference there would have been in 3rd and 4th gears. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I have a stock MAF sensor.
<small>[ November 12, 2002, 07:41 PM: Message edited by: verbs ]</small>
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Re: H/C cars inside.. An 'old wives' tale' that I once heard (in the LT1 world) was that 1 g/sec ~ 1.1 rwhp M6.
So, if you were pulling ~350 g/sec, you'd rw dyno about 385-390 RWHP.
It's up to you to convert g/sec to lb/min. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
-Andrew
So, if you were pulling ~350 g/sec, you'd rw dyno about 385-390 RWHP.
It's up to you to convert g/sec to lb/min. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
-Andrew
Re: H/C cars inside.. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BIGBOS:
<strong>I use an SLP 85 mm MAF, I haven't really dynoed with the stock one, I might try it though to see what kind of difference there might be..</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The SLP 85mm MAF was worth 6rwhp over the screened stock unit on my car.
<strong>I use an SLP 85 mm MAF, I haven't really dynoed with the stock one, I might try it though to see what kind of difference there might be..</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The SLP 85mm MAF was worth 6rwhp over the screened stock unit on my car.
TECH Junkie
Joined: Jan 2002
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From: At the office
Re: H/C cars inside.. I'll autotap on the way home from work.... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
I have plenty of on ramps to work with <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I have plenty of on ramps to work with <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
TECH Junkie
Joined: Jan 2002
Posts: 3,015
Likes: 0
From: At the office
Re: H/C cars inside.. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Camaroholic:
<strong>An 'old wives' tale' that I once heard (in the LT1 world) was that 1 g/sec ~ 1.1 rwhp M6.
So, if you were pulling ~350 g/sec, you'd rw dyno about 385-390 RWHP.
It's up to you to convert g/sec to lb/min. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
-Andrew</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i GOT 336rwhp by those calcs for my LS1...don't think it works too well <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />
<strong>An 'old wives' tale' that I once heard (in the LT1 world) was that 1 g/sec ~ 1.1 rwhp M6.
So, if you were pulling ~350 g/sec, you'd rw dyno about 385-390 RWHP.
It's up to you to convert g/sec to lb/min. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
-Andrew</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i GOT 336rwhp by those calcs for my LS1...don't think it works too well <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Re: H/C cars inside.. Thanks guys.. I think it is closer to the 10lbs=10rwhp thing.. Mine reads 39 to 40lbs consistently and when I had my LS6 MAF on it read up to 44lbs to 46lbs, but I do not think that was accurate. The screen was out of it.. That puts me about 400rwhp with my cutouts closed..