Your donations help keep this valuable resource free and growing. Thank you.
|
304 on the dyno |
Post Reply | Page <12345 7> |
Author | |
jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
Post Options
Thanks(1)
|
That little cam is not an 8K cam by any means. I expected the power band to be where it is.
In the car 6K is no problem but 8K is way out of its power band. This engine can rev will past 6K but why, it will not be making any power there so it does not make sense. I chose the separation angles based on the small cubes. I wanted to help it on the low end and meet the customers needs which is a very user friendly street engine for his wife in the Hornet wagon. This engine meets those needs very well |
|
Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
|
pfordamx
AMC Apprentice Joined: Sep/13/2010 Location: OKC Status: Offline Points: 173 |
Post Options
Thanks(0)
|
did you test a bigger carb just out of curiosity? with the small engine and low rpm it probably didn't use all of the 600 but i'm just curious. and i'm also curious about the headers i would think a set of 1 5/8s would've provided a better torque curve and maybe more power. i know we went from a set of 1 5/8s hedmans to 1 7/8s supercomps many years ago. on 390 with the big summit cam lol and a torquer and it actually lost a little in the 1/4 mile. we dont have easy dyno access here in oklahoma.
|
|
jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
Post Options
Thanks(1)
|
I did not test any other carbs. Looking at the vacuum through the pull the engine likes the carb size.
.5-1" of vacuum through the pull is a good carb size
I was told by David Vizard that 1 5/8 headers would probably pick up the torque by 20-25 and a touch on HP I do not have a set of 1 5/8 headers ready for O2 sensors so I went with the 1 7/8 again |
|
Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
|
Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4210 |
Post Options
Thanks(0)
|
A dream project is a 4" stroke crank in a 3.875 bore 304.
Very NICE build. |
|
Gremlin Dreams
|
|
Jmerican
AMC Addicted Joined: Mar/29/2016 Location: Seattle, Wa Status: Offline Points: 585 |
Post Options
Thanks(0)
|
Dang I woulda sent you some small tube Jeep headers. Nice job. I knew it would be there, power wise.
|
|
Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6911 |
Post Options
Thanks(0)
|
Going to have to mini tub that grocery getter!
|
|
DaemonForce
AMC Addicted Joined: Jul/05/2012 Location: Olympia, WA Status: Offline Points: 1070 |
Post Options
Thanks(0)
|
This has me wondering if I should rebuild my iron 304 or go looking for an aluminum 401 block and destroke that like I've been curious about for years. The 304 is a torque monster and while I don't have any numbers to reflect that, it's spooky on the street. Your 304's numbers reflect those power jumps fairly close and I don't know how I feel about that.
|
|
1971 Javelin SST
American 304 2v | FMX | AM20-3.31 1983 American Limited Jeep 4(.7)L S-MPFI | 1982 NWC T-5M (4.03/.76) | Dana30IFS/35-2.72 |
|
WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5808 |
Post Options
Thanks(0)
|
Nice build, would be interesting to see what it would do with a bigger cam to support more RPM and how much HP it could make up there. Bucket loads or torque is perfect for the street though.
|
|
I've finally given up drinking for good...........now I only drink for evil.
|
|
jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
Post Options
Thanks(0)
|
Thanks,
With a larger cam and 1 5/8 headers, I would be surprised if it didn't make 400 or more torque and HP. A cam and valve spring change could turn this engine into a 7K or more rpm engine no problem. There is plenty of piston to valve clearance where a pretty aggressive cam can be used and the engine has the parts and mods to that rpm without issues More compression with a bigger cam would be better though
|
|
Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
|
232jav3sp
AMC Addicted Joined: Jan/09/2013 Location: Texas Status: Offline Points: 2451 |
Post Options
Thanks(0)
|
I can dig that. So... When are you going to build a 232/258?? Lol
|
|
Post Reply | Page <12345 7> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |