Pulled air vs. forced air is a big difference and airflow matters on a NA. Any restrictions on a NA engine and you will see a loss in hp. A good example is a CAI....you gain hp b/c you have lessened the restriction of air baffles...etc.

 

Man keep that truck as your toy and driver. If you want to go faster start building another truck. Sure it will cost and take some time, but you will still have your daily driver . Trust me, keep the truck as is.
Street truck that hauls *** and is fun drive any time.
Race truck, that hauls *** and is fun to drive AT the track.

Everyone that I ever talked to that made their street vehilce into a race vehicle wish they would have just build another car, or just enjoyed what they had.

O yea, good luck on your quest.

Ricky

 

The idea about the intake elbow is to have the throttle blade after the elbow to interupt the airflow and straighten it out when it enters the manifold. This may help the air charge from being pushed against the back of the elbow and keep it from filling the rear cylinders more than the front. Its good to hear that the bugs are getting worked out, at this HP level some simple things become a science. Good luck on the truck and getting into the 9s!

 

right now i am thinking my whole loss of power might be the race fuel wich i didn't have before. i am going back to the dyno on saturday to play with the timing and see what that does. harlen told me every 2deg should be worth about 40hp if you are maxed out allready. with that in mind 2-3deg might just put me even down low on the hp and way up on hp up top.

i was looking for a rule of thumb on how much timing you need to add for race fuel just to be back to where you started with pump gas but no one wants to guess on that one. another thing i am trying to figure out is i know you should have your lowest timing at peek tq then ramp up to your max rpm, well how much more timing at max rpm vs peek tq should you try and tune in?

 

When I talked to a tech at edelbrock he said there rails where good to about 650hp. I'm not gonna run them. He might not know what he is talking about?

 

i am going to say he doesn't know what he is talking about since i am a ways past that. i have them fed in parallel now just to be safe. i am still running the stock 5/16" fuel line too and i bet it isn't rated anywhere near what i am doing.

 

Thanks Eirk. This is the scenario I was referring to Jim.

 

what was he testing it against? if it was compared to a 3' tall strait up stack then sure i could see a big drop. or was he comparing it to something else that would fit under the hood?

 

I'm a little fuzzy on the conversation, but I believe the comparison was runner alone vs. elbow + runner.

 

i dont see how that test would help us learn anything. adding an extra 90 compared to nothing would have to reduce flow. i guess what i would like to know is does a flat mounted tb right on the intake with a 90 above it flow better than what i have?