what do you think this combo will run?
- Thread starter cutty
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You got a double pump carb and a pretty large cam paired up with small 305 heads. Your putting a large amount of fuel into the motor and trying to put it though those restrictive heads. Your air/fuel mixture going into the piston chamber will be so far off with that much fuel and little air going through the heads. Could have possible problems with the motor bogging out or running really rich.
ive took it for a couple test runs out by my work,seems to pull great till 6200, i know and understand what everyone is saying,but they are on there and is going to the track in 3 weeks and will post what it runs and get a video of it,carb seems to work great, heres a video of it tuned up,dont mind the flat tire guess it didnt like doing donuts to much.....lol, not saying i dont agree, but will see what it runs then worry bout changing them
http://www.youtube.com/watch?v=15HZYkYi ... re=channel
http://www.youtube.com/watch?v=15HZYkYi ... re=channel
cutty said:
She sounds nice. I can definately tell there's some good compression there with the small chambers of those heads. It'll be interesting to see what you run at the track.
Broke1.... a person can port all they want on small runner heads, it's not gonna change the runner size. It's just gonna open the entrance & exit. Small runner heads like 416's are great for low-end torque, not big end power.
I don't doubt you've seen cars with "305 heads" run fast in the 1/8, but lets see a car with "305 heads" run fast in the 1/4, not gonna happen my friend. I'll guarantee they are at their limit & outa air at the 1/8.
A 6.50 1/8 should translate to a 10-10.4 1/4
No way on earth are you gonna run low 10's on a 155 cc runner head. NEVER!!
82355supreme said:
How much do you want to bet???I
You guys do not know much about forced induction or nitrous.When you can cram the cylinder full,it makes up for shitty cylinder heads and the like.
Are 305 heads the best to use?NOPE,but they will get the job done.
Car was an 87 Mustang(3000+ and driver)with a 350 with 9.8:1 TRW forged pistons,.575 solid roller,Vic Jr intake,750 holley,elec water pump with no accesorys,and a 2 stage Big Shot kit
Same car,same engine,same trans,same nos kits,same everything except replacing the 305 heads with the new at the time box stock Dart 220 Iron Eagle heads,car would run 6.1's-6.2's all day long.
Again,not saying the 305 heads are the best but they are just about as good as any production iron head.
You can buy new alum heads on ebay for what it would cost to work a set of irons so its kinda a moot point anyways....
broke1 said:
Now that we're a little off topic..... Why didn't you state that the car you seen run had a power adder??? That makes all the difference. Don't make a blanket statement, be specific.
Take the 3.8L Buick, same heads on the N/A engine as the turbo engine, 200 HP difference, and that's stock!! Power adders, the great equalizer.
Take that Rustang off the baby-bottle and see how it runs.
82355supreme said:broke1 said:
Now that we're a little off topic..... Why didn't you state that the car you seen run had a power adder??? That makes all the difference. Don't make a blanket statement, be specific.
Take the 3.8L Buick, same heads on the N/A engine as the turbo engine, 200 HP difference, and that's stock!! Power adders, the great equalizer.
Take that Rustang off the baby-bottle and see how it runs.
Makes no difference what so ever that it has nitrous or not.
YOU SAID IT COULD NOT BE DONE AND NOW YOU ARE BACK PEDALING BECAUSE YOU ARE WRONG.
200hp difference??No way in hell stock vs stock.....My GN's(more than 1) were rated at 245hp,unless you have the rare fbi twin turbo v8 version??Try 125hp more than NA....
And I know theres no twin turbo version,thats what people who dont know crap say though.....
My friends Mustang would still run 7.50's off the bottle all day long so apparently the heads werent that bad....
thanks,not sure what it will run will be interesting to see for myself also,82355supreme said:
on a side note,it does pull hard till 6200 almost cant wait to see what it will run,some of my buddies had changed there guess to a 13.6-13.8 traction being a huge factor, guess we will see soon,
I'd be interested in hearing your car with those heads. I'm a big fan of my iron 2.02 heads. Really don't need aluminum unless you got the money and are going for some serious applications.
As far as nitrous goes, I'm an all motor kinda guy and live by the saying "Spray's for the dentist". All motor or no motor.
As far as nitrous goes, I'm an all motor kinda guy and live by the saying "Spray's for the dentist". All motor or no motor.
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