|
Post by 69Rebel on May 8, 2014 20:17:01 GMT -8
Nice. 10s here we come.
|
|
|
Post by sc397 on May 9, 2014 4:12:21 GMT -8
|
|
|
Post by dcheek45 on May 10, 2014 4:32:59 GMT -8
Nice job Rick, and Chuck. That should work very nicely for what I have planned.
|
|
|
Post by sc397 on Nov 11, 2014 19:20:49 GMT -8
|
|
|
Post by 69Rebel on Nov 11, 2014 21:18:00 GMT -8
Nice broad torque band on dcheek's 427.
|
|
|
Post by sc397 on Jan 8, 2015 12:33:23 GMT -8
Email from Brad: This is the dyno run that produced the best result. Some repeats of the same tune up showed 1 or 2 less HP and torque, but the battery voltage had dropped to 10 v, so I will count the one shown below as the best (13 v). There was another one that showed 643/592 with this tune up. 4.200 x 3.850. 12.8:1 CR. E85. Jones solid roller cam in at 106 ICL (LSA = 109), lash .018/.019 hot, carb was 95/106 jetting, 6.5 PV. HVH 1” combo carb spacer. Landis 1 7/8” headers. Booya. Thanks for your help Rick. DynoBrad1_zps69efed7d by Rick Jones, on Flickr
|
|
|
Post by stickshifter on Jan 9, 2015 6:16:04 GMT -8
Looking at that graph tells me he is limited by cam, heads, intake, and headers, in that order. Just my opinion. But it sure will be a great street engine.
|
|
|
Post by sc397 on Jan 9, 2015 13:51:32 GMT -8
Yep, he maximized the parts that he had to work with. His "Street" car should perform quite nicely!
|
|
|
Post by greasygt on Jan 9, 2015 16:22:08 GMT -8
Very nice work.
|
|
|
Post by sc397 on Feb 1, 2015 12:44:44 GMT -8
57. MN401: Street 401 wiith 750 dbl bmpr, Torker intake,'74 heads and the compression ratio is 9.5:1. Minimal porting was done, just the exhaust ports. The cam is a Isky 280HL. 224/224 @.050, .490 lift, 108 LS. It ended making 380 HP @ 5200 rpm and 430 #/ft torque @ 4100rpm on 91 octane Sunoco. Very interesting to me that it basically made the same horsepower and torque as Fast401's dual quad 10.2:1 engine with the same exact cam. www.ifsja.org/forums/vb/showthread.php?t=151504
|
|
|
Post by javtwotone on Feb 3, 2015 12:22:31 GMT -8
So, putting Fast401's 291C heads on this engine or MN401's intake and carb on Fast401 would have added how much power? any guesses?
|
|
|
Post by sc397 on Feb 3, 2015 13:15:56 GMT -8
I bet it would be close to 400 HP. We had to jet the 750 carb up 4 jet sizes and it was still on the lean side. I am thinking with the same cam, 9.8/10.0:1 compression ratio, and a 850 Holley would get the 400 horse. Interesting to me that this source en.wikipedia.org/wiki/AMC_V8_engine lists the stock 1971 401 with the 9.5 Compression ratio at 330 Hp and 430 #/ft of torque. So with a bigger carb, bigger cam, better intake and better exhause we made the same torque and 50 more horsepower. Hmm, I wonder if the they rounded up their numbers a little..
|
|
|
Post by fast401 on Feb 4, 2015 4:24:38 GMT -8
Maybe someday I will get the funds to play with the 401 but I am not counting on it.
|
|
|
Post by sc397 on May 4, 2015 11:47:12 GMT -8
I was a consultant on this one. A local guy rebuilt a 304 for a Gremlin with some help from me and my machinist. They dynoed it primarilly just to break it in. A nice reference point to get some numbers. 304 + .030" over bore. 9.0:1 compression ratio. stock heads with bowels opened up. Edelbrock Performer intake, 500 cfm Edelbrock, stock exhaust manifolds, log style on pass side. Comp 268H cam. 2015-05-04 15_31_07-HPTQ-397 by Rick Jones, on Flickr 2015-05-04 15_33_20-DATA-397 by Rick Jones, on Flickr
|
|
|
Post by Captain Awesome on May 4, 2015 19:36:15 GMT -8
Now that is very good info. Everyone with a combo like that thinks they have 300+ HP.
|
|