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304 on the dyno

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Trader View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Jan/12/2019 at 8:03pm
Yes, but your building for the customer, that I understand.
So as of today, the 304 is now the hot 360 and the 360 is the bolt on upgrade 401.
I find it exceptional that you have shared the details of your builds with the few AMC followers left.
I thank You.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mopar_guy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/12/2019 at 8:34pm
Originally posted by 232jav3sp 232jav3sp wrote:

I can dig that.

So... When are you going to build a 232/258?? Lol


When you pay him to build one! LOL I'm sure he would be happy to do so but he doesn't work for free. Wink

"Hemilina" My 1973, 5.7 Hemi powered Javelin
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2019 at 7:34am
An engine like this does not come easy, it takes a lot of knowledge, time, money, good parts and precision work. The engines I build are blueprinted, with a lot induction work, attention to every detail, and an emphasis on making great power within the parameters given. 

I was told by a multi winning Engine Masters competitor that a good measure of an engine is the rpm range where the torque is within 10% of the peak torque. He said if it carries for 2K that is a good engine. 
This engine is within 10% from 2800 rpm's to the end of the pull which is excellent. This is a good little street engine. 
Specializing in engine building and cylinder head porting

https://www.rbjracing.com
Phone Number 518-915-3203
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ADAM12MATADOR Quote  Post ReplyReply Direct Link To This Post Posted: Jan/13/2019 at 9:50am
Nice build. I actually have a Popular Hot Rodding Engine Challenge 401 that i need freshened up.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EVF_Sportabout Quote  Post ReplyReply Direct Link To This Post Posted: Feb/04/2019 at 1:40am
I just want to thank John for all of his effort on this build. The dyno results speak for themselves.  He truly is THE AMC engine specialist!  He listened to me and used those conversations to build an engine based on what I needed it to do.  The cylinder head work and intake porting and experience custom grinding CAMs were indeed the magic sauce that made this little 304 special! He is a great honest guy that can really make red white and blue power! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sonic Silver Quote  Post ReplyReply Direct Link To This Post Posted: Feb/04/2019 at 9:05am
Originally posted by EVF_Sportabout EVF_Sportabout wrote:

I just want to thank John for all of his effort on this build. The dyno results speak for themselves.  He truly is THE AMC engine specialist!  He listened to me and used those conversations to build an engine based on what I needed it to do.  The cylinder head work and intake porting and experience custom grinding CAMs were indeed the magic sauce that made this little 304 special! He is a great honest guy that can really make red white and blue power! 
I agree with everything you said about John. We are lucky to have someone with his attention to detail and willingness to please his customers.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Feb/04/2019 at 9:14am
Very kind words, thank you 

I am not going to lie, there is a customer or two where the communication was lacking and things did not go as well. 

Probably not a good thing to say about myself but I would be lying if I said things always work out perfectly. 

One thing I can say is, in every case a top notch product was delivered in the end. 
Specializing in engine building and cylinder head porting

https://www.rbjracing.com
Phone Number 518-915-3203
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greyhounds_AMX Quote  Post ReplyReply Direct Link To This Post Posted: Mar/06/2019 at 2:22pm
John, how much is a custom hydraulic flat tappet cam from Bullet? Just as a reference point for everyone.
1968 AMX 390 w/T5
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Mar/06/2019 at 3:51pm
203 plus shipping for a typical American V8 iron flat tappet cam 
Specializing in engine building and cylinder head porting

https://www.rbjracing.com
Phone Number 518-915-3203
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Mar/06/2019 at 4:45pm
I cannot get an off the shelf cam for that price!
Just out of curiosity John, I plugged the 304 build into my obscure formulas;
I get your build for a 4200 RPM center, and this produces a maximum torque (cylinder pressure) at 22 degrees ATDC.
By no means knocking your work, I wish I had the knowledge, experience and TOOLS!
Your intake open and close match closely to my calculations for best cylinder charge.
My calculations bring me to reducing the duration of the exhaust by 4 degrees, showing it would pick up 4 ftlbs of torque and 6 to 8 HP. This is of course on paper and not the real world.
Would very much like to see how you came up with your custom grind!

 Are you calculating by peak cylinder pressure and fall off pressure number?
Am I also correct in that this is for an automatic transmission with a higher then stock stall converter?
   


Edited by Trader - Mar/06/2019 at 4:52pm
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