Then there's this......... 575 CFM Barry Grant Speed Demon Carburetor Vacuum Secondary Electric Choke Ford Throttle Linkage <LI>Stock & Mild Performance 283-390ci V8 Engines 132-1282020VFE (Jeg's part number)$419 Then again....nobody listens to me anyway.
Or, you could use a Holley Street Avenger 570cfm. That's what I have on my 302, with Edelbrock RPM Performer intake. Runs like a scalded cat.....
While those are all good recommendations (I noticed yours too shadow). I am going to use something I already have, which is enough holley parts to build a 390, 600 or 725. I may try 'em all eventually. Thanks for all the input guys. If nothing else I just enjoy the bench-racing and BSing..lol. brad
good thread. I like to see good data provided, good answers given, and not a whole lot of arguing over the results. Or, maybe, there are only a couple of really good answers to his question Personally, I think his setup needs a Performer Plus cam. Buy one of those largers ones, then I will trade you even over for the one I have By the way, I am just kidding. I am not very knowledgeable in cams (which is why mine is WAY too small), so listen to the other guys...
I like the cam you chose, it is almost identical to what I am running. Now that I think about it, I have had that cam in the past... If you run your idle on the low side, it will have some lope. IMO, giving this car to a teen, I would keep the highway gears AND use the 390. That way he can spend a year or two getting used to the car and save on fuel. Having the larger carbs and time to get a better gear together, you can bump up the power when YOU feel it's time. If I had a few carbs to take from and built a 390, I would: Put electric choke Ford kickdown (which is already is on 390 IIRC) Use secondary block rather than plate Use center float bowls for dual inlet (need a double pump line with secondary block) Make sure you use bowls with rubber umbrellas rather than BBs Use 600 cfm throttle plate, if it fits, I have never tried on a 390... Make sure the carbs you use, or take parts from, have -3 (or higher number) behind the list number. If they don't, you need to add a power valve protection kit. Then 'supertune' the carb to the engine... You will have more CFM than the stock 2v carb, but the cfm will be spread out over the range of the throttle, giving better tip-in performance and better MPG. Oh, make sure to use a quick change kit on the springs, that way you have more convienent control over the secondary side. My .02 Dave
Ratio, you talking about mine? It lopes a bit with low idle. But with my setup, I think I am cheating my heads and intake to have this small of a cam. But it is not "wimpy" by any means... :evilsmile
Sorry, I was just chiming in (again) on the original discussion. I forgot the exact specs on that cam, but if I recall, it is dual pattern. That adds some 'noise' to the idle. Why dontcha just shove a solid roller in there and be done with it!
I have thought of it...How much extra work is there in a solid roller...I keep hearing how you have to constantly adjust them, but I constantly adjust EVERYTHING on my motor. Is this any different?
For those that would like a dual pattern cam but don't want to swap, you can get dual ratio rockers. Scorpion makes full rollers in 1.6 intake and 1.72 exhaust. I won a set last year and I already have a DP cam, so I am not sure what I am gonna do with em.
hmmm does dual pattern make a big difference? cause my cam is a single pattern is there a hp difference?
Ratio411 You are spot on with my thinking also. We are talking about a 17 yeaar old boy here. He is driving the car now. Currently it has a 250 six, 6 into 1 header, dual flowmasters with a holley/weber 2v and a C4 with shift kit. The 302 combination will be quite a step up in power even with the small 4v. He and I have already talked about him getting another car later on and us then pumping some more power into the Mav, making it more of a weekend type car. Right now it's a pretty sweet lil ride even with the six. It has Mustang Bullit wheels; 17x8 and 17x9, has been lowered and has a larger front sway bar with poly bushings and Granada front discs. We plan to upgrade the rear springs when we do the engine swap. Once the V8 is in, we plan on new paint and some more suspension tuning. brad
the cam that he initially spoke about is the cam i have.. it is a decent cam by decent i mean i run stock heads, 9.5:1 flat top pistonsm edelbrock performer 289 intake, edelbrock 600 cfm manual choke carb, msd ignition stock gears and stock tires and i run a 14.2 in the 1/4... my engine was built by me and i am impressed with the performance. of course i am the typical man.. i want more power and to go faster. pocket book is a little light, so i cannot by the heads, gears and tires that will get that engine into the 12's.... yet! the cam is a decent cam and works just fine with an edelbrock 600.. will a holey 650 work better? i dont know. i dont have any friends around here that have 1 for me to try at the track.. but you are all forgetting 2 important factors on any setup. 1. location. plays a huge part 2. every single engine is different. and until you use a part on an engine, you never know what it will do. i recommend that you not lean an engine out with a carb that is too small. lean is ALWAYS worse than rich just my 2 pennies.
