SLP cold air intake.... HIGHLY scientifically controlled experiment...
03-08-2005, 01:48 AM
#1
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
SLP cold air intake.... HIGHLY scientifically controlled experiment...
Ok, my carefully controlled testing parameters where actually sticking it out the moonroof of my truck while swerving down the highway at 60 mph.
I put my hand over the MAF end of the intake and using a precision calibrated flow testing device (my hand), I felt how breezy it was coming out of there. This was with the filter in place.
I then stuck my hand out the roof to compare what 60 mph wind felt like.
Exhaustive calculations show the exiting velocity to be 55% of the inlet velocity. Inlet area is 1.5"x14" and outlet is 4" round. That's approximately a 40% loss of energy or 'ram air effect'.
It's also 268 CFM of forced induction. Considering a 350cid sbc at 4000rpm wants about 400 cfm of airflow, I think 268 is a big help. It would still pull a slight vacuuum in the induction tract at WOT, but require much less losses to do it.
I'll take it.
Oh, and for ****s and giggles, I added a turning vane to it. the stock setup being perperndicular to the airflow didn't seem very well thought out. This plus the bigmouth air dam should be a worthwhile mod for the money.
Before
After
This shows where the inlet is located, theres my bigmouth air dam, should help out, and it also shows the extra turning vane I added. In HVAC, turning vanes are used and typically reduce duct losses by 40%.
I put my hand over the MAF end of the intake and using a precision calibrated flow testing device (my hand), I felt how breezy it was coming out of there. This was with the filter in place.
I then stuck my hand out the roof to compare what 60 mph wind felt like.
Exhaustive calculations show the exiting velocity to be 55% of the inlet velocity. Inlet area is 1.5"x14" and outlet is 4" round. That's approximately a 40% loss of energy or 'ram air effect'.
It's also 268 CFM of forced induction. Considering a 350cid sbc at 4000rpm wants about 400 cfm of airflow, I think 268 is a big help. It would still pull a slight vacuuum in the induction tract at WOT, but require much less losses to do it.
I'll take it.
Oh, and for ****s and giggles, I added a turning vane to it. the stock setup being perperndicular to the airflow didn't seem very well thought out. This plus the bigmouth air dam should be a worthwhile mod for the money.
Before
After
This shows where the inlet is located, theres my bigmouth air dam, should help out, and it also shows the extra turning vane I added. In HVAC, turning vanes are used and typically reduce duct losses by 40%.
Last edited by CentralCoaster; 03-08-2005 at 02:52 AM.
03-08-2005, 02:57 AM
#3
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
so long as i stay out of deep water i should be fine.
I need everything I can to keep up!
Cost... $180 for everything. I'll turn around and sell the new K&N that came with the slp and my cut lid for $30 too.
I need everything I can to keep up!
Cost... $180 for everything. I'll turn around and sell the new K&N that came with the slp and my cut lid for $30 too.
03-08-2005, 03:05 AM
#4
Team Owner
Member Since: Oct 2004
Location: altered state
Posts: 81,242
Received 3,043 Likes
on
2,602 Posts
St. Jude Donor '05
Not bad...That should help a ton in your quest for cool air.
My research didn't fare as well...No @#$ moonroof.
Chevys 
My research didn't fare as well...No @#$ moonroof.
Chevys
03-08-2005, 03:11 AM
#5
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
Yeah, I made sure to do it at night so as to not look like a fool.
Plus I didn't get off until 9pm that day anyways.
It made my truck feel much faster though, put me back in my seat a little better and I could really tell the difference in throttle response!
Ok, thats it, i'm late for bed. I need to be in Puta Vista at 8am
Plus I didn't get off until 9pm that day anyways.
It made my truck feel much faster though, put me back in my seat a little better and I could really tell the difference in throttle response!
Ok, thats it, i'm late for bed. I need to be in Puta Vista at 8am
03-08-2005, 03:15 AM
#6
Team Owner
Member Since: Sep 2003
Location: Freedom is never more than one generation away from extinction.
Posts: 20,161
Received 640 Likes
on
444 Posts
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21-'22-'23-'24
Originally Posted by cuisinartvette
My research didn't fare as well...No @#$ moonroof. Chevys
Chevys 
Only way you could have done better is doing shots of Tequila at the same time....... Oh yeah, here's ten bucks. Give that Vette a bath.
03-08-2005, 03:18 AM
#7
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
Don't take my word for it on prices, I get everything cheap... I wouldn't want to mislead you to think you could get the same price.
BigMouth was ~$65 (traded services), $125 shipped for a new SLP with K&N. Heck, I only ended up paying $600 to put $1900 Wilwoods on the front of my vette. Got a whole TPI setup for $50 too!
I'm a good scrounger.
BigMouth was ~$65 (traded services), $125 shipped for a new SLP with K&N. Heck, I only ended up paying $600 to put $1900 Wilwoods on the front of my vette. Got a whole TPI setup for $50 too!
I'm a good scrounger.
03-08-2005, 03:26 AM
#8
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
Originally Posted by JrRifleCoach
Oh yeah, here's ten bucks. Give that Vette a bath.
Cracked
Head
Every
Valve
Rusted
Open
Leaves
Everyone
There...
I ran out of soap washing this beauty. It's got more painted surfaces than my home!
First
On
Race
Day!!!!
(please don't ban me mods!)
03-08-2005, 03:44 AM
#9
Pro
Member Since: Dec 2001
Location: Oregon
Posts: 634
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by CentralCoaster
Ok, my carefully controlled testing parameters where actually sticking it out the moonroof of my truck while swerving down the highway at 60 mph.
I put my hand over the MAF end of the intake and using a precision calibrated flow testing device (my hand), I felt how breezy it was coming out of there. This was with the filter in place.
I then stuck my hand out the roof to compare what 60 mph wind felt like.
Exhaustive calculations show the exiting velocity to be 55% of the inlet velocity. Inlet area is 1.5"x14" and outlet is 4" round. That's approximately a 40% loss of energy or 'ram air effect'.
It's also 268 CFM of forced induction. Considering a 350cid sbc at 4000rpm wants about 400 cfm of airflow, I think 268 is a big help. It would still pull a slight vacuuum in the induction tract at WOT, but require much less losses to do it.
I'll take it.
Oh, and for ****s and giggles, I added a turning vane to it. the stock setup being perperndicular to the airflow didn't seem very well thought out. This plus the bigmouth air dam should be a worthwhile mod for the money.
Before
After
This shows where the inlet is located, theres my bigmouth air dam, should help out, and it also shows the extra turning vane I added. In HVAC, turning vanes are used and typically reduce duct losses by 40%.
I put my hand over the MAF end of the intake and using a precision calibrated flow testing device (my hand), I felt how breezy it was coming out of there. This was with the filter in place.
I then stuck my hand out the roof to compare what 60 mph wind felt like.
Exhaustive calculations show the exiting velocity to be 55% of the inlet velocity. Inlet area is 1.5"x14" and outlet is 4" round. That's approximately a 40% loss of energy or 'ram air effect'.
It's also 268 CFM of forced induction. Considering a 350cid sbc at 4000rpm wants about 400 cfm of airflow, I think 268 is a big help. It would still pull a slight vacuuum in the induction tract at WOT, but require much less losses to do it.
I'll take it.
Oh, and for ****s and giggles, I added a turning vane to it. the stock setup being perperndicular to the airflow didn't seem very well thought out. This plus the bigmouth air dam should be a worthwhile mod for the money.
Before
After
This shows where the inlet is located, theres my bigmouth air dam, should help out, and it also shows the extra turning vane I added. In HVAC, turning vanes are used and typically reduce duct losses by 40%.
03-08-2005, 03:53 AM
#10
Team Owner
Thread Starter
Member Since: May 2002
Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Posts: 24,337
Likes: 0
Received 17 Likes
on
16 Posts
Originally Posted by 884fun
How does the air get into the MAF? I see where it enters but lookig at your arrows the air doesn't go into the filter area.
03-08-2005, 08:37 AM
#11
Drifting
Member Since: May 2004
Location: Thornton Colorado
Posts: 1,648
Likes: 0
Received 0 Likes
on
0 Posts
hey if you were serious about selling the old k&n and cut lid I am interested. email me at arrow322@msn.com if so
Thanks
Frank
Thanks
Frank
03-08-2005, 09:14 AM
#12
Melting Slicks
Member Since: Nov 2002
Location: 1993 Quasar Blue 'vert Scottsdale AZ
Posts: 2,471
Likes: 0
Received 2 Likes
on
2 Posts
Originally Posted by CentralCoaster
Yeah, I made sure to do it at night so as to not look like a fool.
Plus I didn't get off until 9pm that day anyways.
It made my truck feel much faster though, put me back in my seat a little better and I could really tell the difference in throttle response!
Ok, thats it, i'm late for bed. I need to be in Puta Vista at 8am
Plus I didn't get off until 9pm that day anyways.
It made my truck feel much faster though, put me back in my seat a little better and I could really tell the difference in throttle response!
Ok, thats it, i'm late for bed. I need to be in Puta Vista at 8am
