Wow! Talk about bring a thread back from the dead!
Well here it comes, I love math. A stock 225 has a bore of 3.40 and stroke of 4.125.That makes a swept volume of 613.7cc. And an 8.2 C/R would be 613.7 /7.2 =85.24 TOTAL combustion chamber volume.Hi Raleigh Rocket: You suggested milling a 225 head 0.100 to increase power. I want to mill my head but have a couple of other questions if you don't mind. My current compression is 8.2:1. What will 0.100 mill raise compression to? Can I use all stock valve train?
Peace,
Taz
Well here it comes, I love math. A stock 225 has a bore of 3.40 and stroke of 4.125.
I'm not going to read through this to see why you posted a "disagree" to my post 5 years later."Mmmmmmm, goood cracker."
Put a weaker throttle spring on it and move the seat up a notch. Sorry, couldn't resist....
Find a stock 360 that runs. Take weight out of the car.
Look at what forum you are in, and then look at the advice you gaveI'm not going to read through this to see why you posted a "disagree" to my post 5 years later.
Maybe you'd care to explain? If I disagree with someone, I explain myself. Nicely, of course! What up?
Lol. Yeah, I see that now. I wasn't the only poster to suggest a V8, but he picked me out. Like I said, I wish he would've just posted why.Look at what forum you are in, and then look at the advice you gave.
I bet I know why he gave you the red X
Heck, the OP even asked about it, and later mentioned he's a V8 guy!Well the only thing is, would i be better off grabbing a smallblock or just stick with the slant 6?
You just have to realize that if you're into something that isn't mainstream, you'll get comments like "put an 8 in it". You'll go nuts if you let it bother you. I used to modify VW Bug engines when I was younger, because they were cheaper to work on. So, I know how you feel. (The first car I drove after my warmed-over Bug was my 70 Challenger R/T w/ 383, 4 spd and 3.91 gears. I never went back!)
Increaee the jet size on your carb and decreasde the airflow jets. FUEL=POWER!Alright so it seems like the more work i do on my Dart, the tighter and tighter the budget gets.
What are the cheapest ways to increase power on a 225 slant six?
Yes if you want to burn it up. Nitrus is not cheap and its a wimpy way out!Nitrous all the way, a 150 shot will put a 3000 lb slant 6 car in the 13's for $400
Ignorance is bliss, Obviously you havent, reseached nitrous, a 150 shot can safely be used on cast pistons, the last Complete kit i priced was about $450, thats $3 per hp. If you find something for Less let me know, ill buy it.Yes if you want to burn it up. Nitrus is not cheap and its a wimpy way out!
I work in an high performance race engine building shop. I see first hand what nitrus does to pistons. Its a cheap way out for lack of building knowledge on how to build a naturally aspirated engine with high HP! The nitrus is cheap the set up and plumbing is not! Im not against it but there are better ways!Ignorance is bliss, Obviously you havent, reseached nitrous, a 150 shot can safely be used on cast pistons, the last Complete kit i priced was about $450, thats $3 per hp. If you find something for Less let me know, ill buy it.
Every engine i have seen that was fried by nitrous was the result of not reducing total advance, wrong heat range spark plugs, and not using an air/fuel ratio gauge, and not testing and tuning. The ones i saw were 150 or less, i have no knowledge of huge shots. During WW2 the US and the GermanI work in an high performance race engine building shop. I see first hand what nitrus does to pistons. Its a cheap way out for lack of building knowledge on how to build a naturally aspirated engine with high HP! The nitrus is cheap the set up and plumbing is not! Im not against it but there are better ways!
I sort of agree. I only have experiance with nitrous on the slant six. I have hurt forged pistons with a 150 shot, on 225 cubes. But have also not hurt stock cast pistons on 225 shot on a 170 engine. It is a matter of the tune up.Every engine i have seen that was fried by nitrous was the result of not reducing total advance, wrong heat range spark plugs, and not using an air/fuel ratio gauge, and not testing and tuning. The ones i saw were 150 or less, i have no knowledge of huge shots. During WW2 the US and the German
Sucessfully used nitrous on high altitude aircraft. Some of those engines produced 1500-2000 horsepower.
That's easyAlright so it seems like the more work i do on my Dart, the tighter and tighter the budget gets.
What are the cheapest ways to increase power on a 225 slant six?
Yep, I'm a bottle baby.
We run for the most part in our engines KB with a special coating on the skirt and top of the pistons for heat. You also have to set the ring gap bigger because the heat will cuae the rings to expand and seize up the pistion or destroy the cylinder walls!I sort of agree. I only have experiance with nitrous on the slant six. I have hurt forged pistons with a 150 shot, on 225 cubes. But have also not hurt stock cast pistons on 225 shot on a 170 engine. It is a matter of the tune up.
I do agree it is a cheaper way to go quick, but not necessaraly because of a lack of ability to build NA engine. I'm strickly a low dollar racer. There is no way I can afford to build a 12 sec "A' body NA slant six car. The cost of machining alone is more then my fogger system. My car is almost 4 sec quicker on the bottle, then NA. The other niice thing about my motor is, if I do hurt a piston, it is a cheap fix. I just pull another stock piston/rod assy out of the used parts box, and put it in. Easy/peasey
Oh yeah! Big time difference! Just going from 3:23s in my 383 4spd 68 Coronet to junkyard sure grip ( 50 bucks, in the 90s) 3:55s was a massive improvement! You could jam down the interstate in 4th, and slap 3rd, Man! YEEEHAWW! the 4:56 set I put in lasted about a week, it was a fun stoplight slayer, but trying to get anywhere on 275, 75, I 4, was not a working deal.Been said...gears. We had a 170 slant we changed out to a 225 because this car couldn't get out of its own way until the next light, and the 225 was no help. Turned out the guy had 2.54 gears out if a Cordoba! Next time I saw him he got some 3.73 gears for that rear and he laid a strip of rubber to show it off.