home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 08-10-2019, 07:37 PM   #1
LukeWoessner
Newbie
 
Join Date: May 2018
Location: Raleigh, NC
Default 96' 850 (2.4L Non-Turbo) Dyno Pulls

8/10/19 Straight Pipe (w/ Cat) + IPD Filter

Low results... The dyno they use is an AWD Superflow WinDyn "Heartbreaker" style dyno (usually reads around 20% lower than a dynojet) that reads WHP. Put down a pretty terrible 61.6 WHP at 6000 rpm and 65 ft/lbs between 2500-5000 rpm. What I didn't know going in was that you are meant to run the car around for a while or warm it up on the dyno prior to making pulls. (Coolant was up to temp, but oil and transmission fluid weren't, increasing losses) Engine has good compression (around 190 psi on each cylinder), new-ish plugs, wires, distributor cap/rotor, etc. I'm going to do a full stage zero and put a muffler back on it. (Thinking the cat-only exhaust system may be a detriment to exhaust scavenging) Any other ideas tune up wise as to the cause of the low output?

https://youtu.be/cv7Zzu9lnDU
LukeWoessner is offline   Reply With Quote
Old 08-13-2019, 04:17 PM   #2
blkaplan
50 shades of beige
 
blkaplan's Avatar
 
Join Date: Jul 2002
Location: Rockville, MD
Default

those numbers are horrible. you definitely have something wrong.
__________________
www.BEIGEPOWER.com
Kaplhenke Racing Facebook
Quote:
Originally Posted by DarkKratoz View Post
The only safe bet is Ben.©
blkaplan is offline   Reply With Quote
Old 08-13-2019, 04:58 PM   #3
redblockpowered
Board Member
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

Does it feel like it has 65 whp?
__________________
1993 944 B230FT/M90 thread here: http://forums.turbobricks.com/showthread.php?t=345277
1991 245 B230FNA/M47 no thread: secret LeMons car technology abounds
1991 245 B230F/M47 no thread: very boring (320k!)
redblockpowered is offline   Reply With Quote
Old 08-13-2019, 11:00 PM   #4
ovlov760
Board Member
 
ovlov760's Avatar
 
Join Date: Jun 2003
Location: Midwest - IL
Default

Quote:
Originally Posted by redblockpowered View Post
Does it feel like it has 65 whp?
I'm curious about this as well.

It's rated at 168 hp from the factory.
ovlov760 is online now   Reply With Quote
Old 08-13-2019, 11:59 PM   #5
RvolvoR
Board Member
 
Join Date: Jun 2003
Location: PDX
Default

You mostly have a display of lazy dyno operators here. Essentially, they are adding in another differential, pair of wheels, and pair of dyno drums for your engine to move by not disconnecting the AWD rollers...lol. Lazy or incompetent...

lemme guess...subaru shop?
RvolvoR is offline   Reply With Quote
Old 08-14-2019, 12:00 AM   #6
RvolvoR
Board Member
 
Join Date: Jun 2003
Location: PDX
Default

did this place used to be the shop section of 3SX or something?
RvolvoR is offline   Reply With Quote
Old 08-14-2019, 09:11 AM   #7
redblockpowered
Board Member
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

Just a wild guess, maybe it's averaging power output at the rollers (because AWD) and you're actually putting down twice that? Silly, but maybe believable.
redblockpowered is offline   Reply With Quote
Old 08-14-2019, 10:02 AM   #8
RvolvoR
Board Member
 
Join Date: Jun 2003
Location: PDX
Default

Quote:
Originally Posted by redblockpowered View Post
Just a wild guess, maybe it's averaging power output at the rollers (because AWD) and you're actually putting down twice that? Silly, but maybe believable.
this is what I am thinking....I can't tell for sure from the superflow website, but I am almost thinking that it has dual strain gauges on the dyno and it adds together the outputs from them.
RvolvoR is offline   Reply With Quote
Old 08-14-2019, 10:28 AM   #9
stick70
All the gauges
 
stick70's Avatar
 
Join Date: Sep 2006
Location: North Carolina
Default

FWIW my 122 wagon made 150 at the tire with a '98 S70 n/a engine with 200k?? (who really knows) miles. You should be north of 100 easily.
__________________
Kyle and the "Projects" -- '84 242 TI -- '66 220 S -- '89 Supra Turbo -- '84 Rabbit GTI
stick70 is offline   Reply With Quote
Old 08-14-2019, 11:04 AM   #10
Tfrasca
Board Member
 
Tfrasca's Avatar
 
Join Date: Apr 2015
Location: Ben Lomond, CA
Default

At least it sounds good.
Tfrasca is offline   Reply With Quote
Old 08-14-2019, 04:08 PM   #11
blkaplan
50 shades of beige
 
blkaplan's Avatar
 
Join Date: Jul 2002
Location: Rockville, MD
Default

Drive a quarter mile and check your trap speed. You should be able to get a ball park of your hp numbers to verify with.
blkaplan is offline   Reply With Quote
Old 08-14-2019, 04:37 PM   #12
linuxman51
BRANDSCHUTZVORSCHRIFTEN!
 
linuxman51's Avatar
 
Join Date: Dec 2002
Location: mont, AL
Default

lmao. both the car and the dyno should be "warmed up". If it's the first pulls of the day, various things need to get moved around a little, and for the car itself if it's not up to temperature that can affect power readings.

However, neither of those situations will cause what would normally be ~140whp to become 65 whp. Also, you'd know long before you hit the rollers if your 850 was only throwing down 65whp, when you couldn't merge with normal traffic.
__________________
"They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy"

Now with in-house Dyno tuning!

Megasquirt Tuning!
Plug and play LH 2.4 Megasquirt, now with stealth mode!
linuxman51 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 08:22 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.