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After speaking with the cam guys and my engine builder again, 3/8's push rods are the way we are going to go as we can offset the rockers by T&D
You might be able to do like my buddy did and clearance the heads(depending on your heads), which is what he did on his Brodix heads. I would want a 3/8" pushrod in there with that kind of lift which means a pretty strong spring as well.
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72 Nova -383, AFR 195s, Lunati #60113, 11.70s, next pass will be an 11.50
I would go with the larger as well, and if you have to by the rockers and lifters, go with an offset set and you will have more clearance, and the ability to go with a larger set of heads (235-245 ) with a wider port at the pinch point of the port for more power. Frank
I would go with the larger as well, and if you have to by the rockers and lifters, go with an offset set and you will have more clearance, and the ability to go with a larger set of heads (235-245 ) with a wider port at the pinch point of the port for more power. Frank
I have ordered the Shaft rockers with an offset and Lifter with an offset as well to accomadate the 3/8's push rods. I have the Heads all ready...However with some porting work on the heads and intake we saw 305 @ 700 and 235 @700 exhaust. Pac has supplied the springs 265 at 1.9 install height on the seat and 805 open with titanuim retainers
Well u got a few opinions on here so u stick n with your list ?
Only going to change a few things...but mostly have everything so can't change too much...I feel my limiting factor will be heads and intake but I'm interested to see with some medium port work if I can make around 600hp n/a and close to 1000hp on the bottle...
Okay so, I went with T@D for the rockers and they are setting me up with 250 offset and from some quick measurements I will be able to run a 3/8 intake and a 7/16 exhaust push rod... looks like I will have a pretty well built setup. I have compared some more numbers on my heads with other very competitive heads and my numbers are comparitive, I'm excited to see If I can make my goal even better then originally forecasted. I should have the engine together in the new year...Hopefully early in the new year!
Okay All, So I did Change a few things over the engine bulid!
Headers are Dougs 1 7/8 to 3.5 inch collector, non slip on
Went with a bullet custom grind cam
T@D 1.6 rockers
3/8s intake push rod
7 1/6s exhaust pushrod
Crower .150 offset bushed lifters
Trick Titanium Valves
Meziere 55GPM Elec pump
Oil Accumilator
Moroso Vac Pump
11.6 CR now with Cam changes
And a couple of other good trick things
I don't understand about your coment on the push rods. I use 3/8 in mine?
Small block heads that are (In most cases) over 165cc intake runner will not have room for a 3/8 pushrod.
And when over 210cc even with offset rockers and lifter your still limited to 5/16.
5/16 .080 wall pushrods can handle the job with ease.
And they are lighter.
Anything more is a waist of money and will not help performance. If anything the added weight could rob HP.
Some heads are notched for larger pushrods, this does effect the intake port air flow.
Al
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“The bitterness of poor quality & Service remains long after the sweetness of low price is forgotten”
I will have a pile of pics to post once the engine is back together for good! We have changed some stuff as mentioned! I have a time booked for early in the new year to put the engine on the engine Dyno so I can get a proper baseline to start with.
i think if i really wanted a tough nitrous motor ,, i'd do a 406 with a 5.85 rod , ring placement could be better , thicker crown on the piston , but thats me
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