Cooler Intake Charge?
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,743
Likes: 37
From: Stockton Ca
Cooler Intake Charge?
I want to make some changes to my fuel delivery system. I have the stk line attached to engine block going to 650 Demon on Air Gap. I wonder what I would gain if anything by using steel bradied hose and a heat shield w/insulator?
My next question is: How much of the benifit w/carb spacer is due to cooler temps or increased plenum?
If 10* reduction in temps = 1% more power, I should be able to bring temps down about 40*. I'm always looking to free up some power. Where am I wrong? TIA
Ricisan
My next question is: How much of the benifit w/carb spacer is due to cooler temps or increased plenum?
If 10* reduction in temps = 1% more power, I should be able to bring temps down about 40*. I'm always looking to free up some power. Where am I wrong? TIA
Ricisan
Pro
Joined: Jan 2009
Posts: 576
Likes: 3
***** Warning and disclaimer, I haven't actually used any of these*****
But, several options:
Fuel coolers:
http://www.shopatron.com/product/part_number=4136/694.0
http://www.jegs.com/webapp/wcs/store...10291_-1_10267
http://www.dana.com/Automotive_Syste...trusionfc.aspx
Then use something like this :
http://www.sfxperformance.com/parts/SPT9859.htm
to get cooler air from the front wheel wells if you remove the dust covers.
Combined with a heat shield under the carb, should make a difference
But, several options:
Fuel coolers:
http://www.shopatron.com/product/part_number=4136/694.0
http://www.jegs.com/webapp/wcs/store...10291_-1_10267
http://www.dana.com/Automotive_Syste...trusionfc.aspx
Then use something like this :
http://www.sfxperformance.com/parts/SPT9859.htm
to get cooler air from the front wheel wells if you remove the dust covers.
Combined with a heat shield under the carb, should make a difference
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,743
Likes: 37
From: Stockton Ca
There was a fuel pump insulator kit. It had a big rubber spacer between the fuel pump and the block. It also had some rubber insulators for the bolts. looked good, but I couldn't find it for sale.
My next trip to the dyno, I will have some carb spacers to try. If they really work, I'll have to cut a hole in the hood?
I wonder what determines if a carb spacer will work or not? TIA
Ricisan
My next trip to the dyno, I will have some carb spacers to try. If they really work, I'll have to cut a hole in the hood?
I wonder what determines if a carb spacer will work or not? TIA
Ricisan
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,743
Likes: 37
From: Stockton Ca
Wow!
Mike: I was thinking that underhood temps would be 180*-200*.
If the fuel was insulated from the block/ehhaust, 2" insulator/carb spacer w/hood scoop/ram air getting outside air, 5* seems very low.
I take it that you have done this? I know that theory gets shot in the azz by reality regularly. Is this such a case?
If the fuel was insulated from the block/ehhaust, 2" insulator/carb spacer w/hood scoop/ram air getting outside air, 5* seems very low.
I take it that you have done this? I know that theory gets shot in the azz by reality regularly. Is this such a case?
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
The problem with the spacer is separating out any increase from the temperature reduction from that of the increased plenum volume and decreased radius turn that the air/fuel mixture has to make. Both of these phenomona can increase hp.
I use a 1/2" aluminum open spacer for a little more top end, and while my dyno numbers are very good (for what it is), I've no idea of how much of this is due to the spacer.
BTW, I run a '67 hood on my '64 and also opened up the front scoop.
I use a 1/2" aluminum open spacer for a little more top end, and while my dyno numbers are very good (for what it is), I've no idea of how much of this is due to the spacer.
BTW, I run a '67 hood on my '64 and also opened up the front scoop.
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Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,743
Likes: 37
From: Stockton Ca
Toddalin: I agree 100%. I've noticed in some build ups that the smaller the intake, the more it seems to respond to a spacer?
If a 2" spacer added 20 hp, I would have to change the hood.
A 4" raised hood looks very businesslike!
The next time I go to the dyno, I will have some spacers to play with.
Ricisan
If a 2" spacer added 20 hp, I would have to change the hood.
A 4" raised hood looks very businesslike!
The next time I go to the dyno, I will have some spacers to play with.
Ricisan