Hughes Engines solid flat tappet cams and engine advice please

-

Sb Valiant

Active Member
Joined
Jun 21, 2013
Messages
25
Reaction score
0
Location
West Middlesex
How many of you small block guys that are running a smaller cubic inch under 400 ci with 260+ cfm heads
running one of the hughes grinds and turning 7,000+ rpm? They are having a cam sale going on and I am interested in buying one. I understand about the lift of the cam and having heads to back it up but I'm not sure so much of duration @ .050. Does anyone run a lot of duration like 272-276 @ .050 on a smaller engine with a good set of heads? I have a 344 inch motor with W2's that I would say flow close to 290 cfm. Thwy have a 2.08" intake valve that's a 3/8 stem. They also have a nice 3 angle race valve job and ported. I have a heavily modified M1water heated intake to go on top of the heads. I have some old school 7° titanium retainers to use and I'll have to get the right matching springs, keepers, and possibly retainers if mine wouldn't work for some reason. Bottom end is nothing fancy besides a 8 bolt Mopar performance forged crank that has been knife edged. I need to get a set of H beam rods and lite pistons yet. I plan on building some 1 7/8" headers along with my own oil pan most likely. I have a old style 850 holley that I bought a e85 conversion kit for. We have never had a decent carburetor yet so if we can get this one tuned in it should be a good gain. I am back halfing the car I have now which is a 1963 plymouth valiant. I am
expecting it to weigh between 2700-2750 with driver. I need to buy a T/A or some kind of decent 8" converter. I want to run in the mid 10 range in the 1/4 for sure. I think I'll need to turn 7,500 or so rpms to do it with this small engine. I am open to any ideas or opinions on my build and camshaft slection. Thanks FABO
 
Compression ratio I am shooting for 12:1 to 13:1. I'll probably do some oiling mods and tricks to gain some hp. I have thought about crank scrapers and not running a windage trey. I have also thought
about running a 8 qt or 9 qt pan with 6 qts of 10w 30 synthetic oil. I plan on making a good oil pan
that will have as much of a rear sump as possible but I am limited to a stock front end. I know vacuum pumps free up some power. For rockers I plan on using crane gold 1.6's. Not sure if I want to uae a 3/8 or 5/16 width push rods. That's pretty much it for the motor. I have a 904 trans with manual valve body with a brake. I have 29.5x10.5 slicks to use to put the power to the ground. I am using chassis engineering ladder bars with comp magnum coil over shocks. The rear end is a 8.75 and I have
yet to decide what gear to use. I have some 5.13's but I was thinking more like 4.88's.
 
I ran mid 10's with a similar combination but a little heavier 70 Dart. 360 small block bored 0.030 with W2's that flowed 290 cfm. Cam was a cam dynamics 0.585 lift and duration at 0.050 of 275 degrees flat tappet. About 11.5 CR. Converter was a TA 5500 stall. Holly strip dominator intake and modified Holley DP flowing a little over 900 cfm. Combination worked very well. SOunds like you are on your way to sub 11 second runs.
 

I just had a 372 built with W2's that flow 288.Running a Howard's cam that's .599/.616 and 282/288 @ .050 is 254/260.12:1 comp and a Holley Strip Dominator intake and 850 DP.Just a stock 360 cast crank that had the mains turned down for the 340 and internally balanced.Built it to run on the street with E85 in a 73 Scamp the weighs right around 3000 with me in it.Motor is not installed yet so I can't talk about how it runs,but a buddy of mine did basically the same set up with a 318,Mopar .590 cam and race fuel.He ran 10.60's all day at 3200' ft in a 70 Dart.I'll pick up the spec sheet on my motor and post it for you sometime soon.My cam is part number 712712-08 if you wanted to research it.
 
I am currently building a 318/390 and just bought a great set of 894 X Heads that flow 270cfm.
Solid flat 282s Comp - .495 lift 236 Dur @ .050
 
-
Back
Top Bottom