By using the spread bore adapter it will flow better because you'll be taking advantage of the full bore of the intake, and it's beveled so air flows into it with less restriction. Otherwise, a square gasket will cut a portion of the intake bore off. So to answer your question, I'm sure there is some loss of power without the adapter
You can't bolt a Holley carb directly onto a stock Q-Jet intake because the bolt pattern does not match therefore the Q-Jet/Holley adapter must be used. The only Holley cabs that bolt on directly are the old Q-Jet replacement spreadbore type.
Not quite done yet. May have to go to a 50cc front pump. Runnin 37 squirters now, NEED MORE GAS!!!!!!!!! Its gettin much better though.:grin:
Marty send me the clip via email. Is the weather getting better? I need to get the 350 car out of the garage one of these days. Also I may be coming up to NW Ohio this summer. Planning vacation,:beer
Both you and Mart have the heat blocked to the intake. I know that you do because you run the X-Factor intake. I am not sure if Mart does or not but it seems like it is since he has to give it so much gas on the pump shot. What you are getting now is no heat in the intake to help atomize the gas. The heat helps turn it into a mist which keeps the gas suspended until it gets into the combustion chamber. Without this heat you get droplets of gas going into the intake instead of a mist. It takes a lot more gas to run the engine without the heat from the heads. I have seen where some people will put the plugs in to block the heat then drill a small hole in there to get some heat in there but not enough to effect the power. A cold intake needs a lot more gas to keep the engine running good. Basically you are trying to run the engine that is always cold so it now needs more gas to make up the difference.
Very good point Guy. Yes mine are blocked and port matched to boot. I would drill a small (1/4") hole in the plugs but I am not yankin the intake off just yet. I do run a 180* thermostat instead of the 195* that was stock for the '71 model year. Could change that back too. It might help a little also.
I would first try just a 1/8 hole first to see what happens. I just can't remember where I read about this so maybe someone will talk about this and give the right procedure. The 5.0 Mustang guys block their heat to the intake also but the computer and fuel injection help make up for this easily. You will just have to work with the cams and shooters to get yours perfect. It would be interesting to see how much horsepower you gain by blocking the heat from the intake. Unfortunately this does cause the engine to use more gas as you also have to jet up a little bit for the cold intake. This is really one of those track only items to use at the race track. I think that just a small hole in there will give you just enough heat to drive on the street then when you go tho the track you wont kill the power by heating the intake up too much. 71skylark3504v will have to add the gas that is needed because of the X-Factor intake he is using. He should go to a dyno shop to get the jetting right in the carb. He may need more than he is giving it. I would try to get the shooters also that have the tubes on them. They direct the shot into the carb a little better.
How do you and Mart like the cams you put in. Have you run it very hard yet.Your cams are very similar to mine. I just have a little more duration than you guys have. My lobe separation is at 116. I can tell you though when I had the loose 3500 convertor in it rocked out of the hole. I was getting 1.81 60 ft. Nick is getting around 1.60-65 with his on nitrous. I have a tighter convertor in now it is a 3000 stall. This one is a little tighter also because I run the nitrous. Now my 60ft is about 1.90 and I am getting about a 1.70 on nitrous. That is almost a car length between 1.70 and 1.90 60 ft. I wasn't sure what convertors or stall you had but I think a loose 3000 stall would make your cars pull like mad out of the hole. I was just wondering how the cams were running.
"How do you and Mart like the cams you put in". Guy: we've talked and you know I am still fine tuning now. Cam has been in since last July. Have about 1,200 miles on it. Need to adjust lifters 1 more time. I like the idea of your "check ball" lifters, I had 1 stick for a short time last year. I like the cam, it pulls hard to 6,100. Been running the crap out of it as I have been dialing the stumble out. I don't have 4th gear lockup yet, only running a stock D-5 convertor, probably stalls at approx. 2,000 to 2,200 It will tach up to 6,000 in 1st before you know it. The 390 gear helps that, I imagine. The guy at work I wanted to run with the WS6 got scared and pulled his eng. apart yesterday for Ls6 heads and bigger cam, oh well. I'll run him with the Z06!!!!!!!:laugh: :laugh: :laugh:
Next up is you guys need to get to the track and what you can get out of it. Two more hot 350's running around.
I am going to finish up my spring semester with good grades, hopefully:Brow: , then my full attention will be on my car.:beers2:
