To big of a cam for that low compression. Plus 323's are for cruisers. Get some 430's. Put a plate on it with a 150 shot. Then you will be back on here asking what should I do to get it to hook up. LOL
I saw your video. How did your car get crashed?To big of a cam for that low compression. Plus 323's are for cruisers. Get some 430's. Put a plate on it with a 150 shot. Then you will be back on here asking what should I do to get it to hook up. LOL
Need to verify it’s not spinning the BFG T/A radials.
I was thinking that, stick a go pro on the fender and hammer it. See just what’s happening
OP has had issues with the Sniper FI.
Backally, have you run this motor with a carb.
Was this motor dyno’d with the Sniper? If not, did you drive it with the dyno carb?
it's not quite that simple...I remember a comparison Dulcich did with an identically built 408 and 360.Can't remember exactly but i think they used a stout cam and stock heads.There was very little difference between the 2 engines.
there is about 3 to 4 tenths difference at the track.
Ken Hensley and i had that conversation years ago, its proven correct on many combinations, including a couple of nine. The worse the heads, the less the difference obviously. I have swapped mild eddies and seen the difference Hensley mentioned
Thats a significant difference. Likewise, making a gear change one step, say 4.10 to 4.30, 3.23 to 3.55, etc, rarely makes much difference at all, and if it does, its minimal
I went from 3.73’s to 4.10’s without changing anything else and what you’re saying was true for my setup. Negligible at best at the track.there is about 3 to 4 tenths difference at the track.
Ken Hensley and i had that conversation years ago, its proven correct on many combinations, including a couple of nine. The worse the heads, the less the difference obviously. I have swapped mild eddies and seen the difference Hensley mentioned
Thats a significant difference. Likewise, making a gear change one step, say 4.10 to 4.30, 3.23 to 3.55, etc, rarely makes much difference at all, and if it does, its minimal
To big of a cam for that low compression. Plus 323's are for cruisers. Get some 430's. Put a plate on it with a 150 shot. Then you will be back on here asking what should I do to get it to hook up. LOL
Sorry, now I remember you showing pictures about that suspension bolt failure. Damn that was a big loss.My son took it around the block after taking it out of the race trailer sitting for the winter . We raced it the year before and noticed wheel shake when the passenger side tire would land after the launch. Never thought much of it after looking at it at the track but were going to put in that tube K-member we made before the next season. so suspension was being replaced
We never put dawn dishwashing liquid in the new hoosiers so they would leak slow. So when we put it away we put the extra wheels on it from my 71 RR. 15x7's so it wouldn't sit with flats. He took it around the block and wanted to see how the 275's hooked compared to the 29 14.50's hoosiers. The shake was the Passenger cheap *** front UCA bolt stripped from the alignment shop. With the front runners the tire never hit the fender at the track or the short runs on the street.. With the 15x7s they hit when the tire moved back leaving off at the end of second. It cut the tire and took the car right off the road.
The spool didn't help things. The cage banged him up pretty good and broke a couple of ribs, He wasn't strapped in. I can replace the car which we will and it will be much faster. My son coming home was a blessing. The second last picture of the car leaving the driveway first time ever driven with these tires. The last pictures are what was usually on it. Never did this car have street tires. I should have left it sit with flats. Now you know. My son is 34 and had been racing sprint cars and ATVs since 16 nationally. **** happens.
I had that car a very long time and this wasn't its first bad wreck. We just clipped the car before painting it ford orange. Paint was free LOL. It started off life Bahama yellow when I bought it she was red. Then white, then orange and had its front clip replaced twice. body once. It had built 340's with iron heads. 340 iron head W2 motor, 428 aluminum batten head motor. and then this 416 indy. Been through alot since I bought it in 70's. I have a lot of pictures and videos of this car in all colors from over the years. This wasn't its last ride believe me. 7th picture is me and todd my neighbor when he worked for me . Man I wish I could go back to those years my energy level was so much higher. LOL.
So that is the history of the Duster and its demise. But there were many more you all never seen. I street races b-bodies since 71 and had some wild rides that I destroyed and survived.
View attachment 1715564394
View attachment 1715564405
View attachment 1715564415
View attachment 1715564417
View attachment 1715564419
View attachment 1715564420
View attachment 1715564421
View attachment 1715564422
View attachment 1715564427
What's your elevation?Got a 408 a 3350# Duster, estimate 450-475hp. This is a street only car--4spd, 3:23 gears with 245/60-15 BF Goodrich's. I got a Holley sniper so can look at datalogs. If I am in first gear rolling along at about 2000rpm and mash it, it takes about 1.75 seconds to get to 6000rpm. Only traction addition is the pinion snubber, but seems like it hooks up, tires aren't squealing or leaving black marks . Just seems to me it should be quicker or am I expecting to much?
Sniper with WOT a/f at 12.8, Edelbrock rpm heads & intake. 235/239 @ .050, 535/550 lift. 9.5 compression
that cam is fine for 9.5:1 compression. i've ran way bigger cam , 621 lift with 9.5:1 compression. and i also ran 3.55 gears
perzaktically.my 360 smokes the tires with 2.94's.
Need to verify it’s not spinning the BFG T/A radials.
what were your ET's in a quarter with those 355's. 1000 RPMs with small tube open headers what fuel are you running? They all sound good at an idle with open headers . Blower motor with 8-1 same thing. Show us a video of it launching on pump gas with those 355's and 9.5-1 LOL. 9.5-1 my ***
Disagree. That's a small cam.To big of a cam for that low compression. Plus 323's are for cruisers. Get some 430's. Put a plate on it with a 150 shot. Then you will be back on here asking what should I do to get it to hook up. LOL
my 360 smokes the tires with 2.94's.
What cam,converter and tires are you using with your 360?
"Small cam" yes of course,Disagree. That's a small cam.
While I would tend to agree with a dcr under 8:1 being a turd at low rpm you made a huge assumption on Intake closing degree not knowing the actual spec. That could be the difference between a 7.2 and an 8"Small cam" yes of course,
but as @Oldmanmopar said; "Too big of a cam for that low compression",
And I add;
1) especially for a 3.23 geared, manual-trans streeter, which will likely spend the vast majority of it's life below 4000rpm,which is
~37mph in first/52 in second/71 in third/100 in direct.
Typically, I shift my 180psi 367 at 2800. That is more than enough to work traffic. And to accelerate briskly to 65mph, 4000 is way more than enough.
2) especially for aluminum heads which will easily accept 185 to 195psi cylinder pressure. Which at Part Throttle, that high pressure is simply amazing. Putting alloy heads on a 135psi stroker, IMO, somebody goofed; those heads will never reach their potential.
At a measly 7.3/1 expansion ratio, 135psi makes 986 psi in the chamber at WOT, at peak torque.
At 8.8, 175 makes 1540psi.
The latter is~ about 56% greater.In a streeter, I know which one I want.
_____________________
I'll give up 3 cam sizes for that latter. Oh wait, I already did.....
I will never ever go back to low-pressure, not with any engine in any car, and I don't care how many more than 3 speeds it has,lol. For as long as we can still buy at least 87 gas, I will continue to run 180/185psi, with alloy heads.
If I knew what @yellow rose knows, I would try a hi-pressure iron-headed beastie.
Cam card below. Elevation here is about 900ft. I’m going to Hang a GoPro and see if tires are spinning, but it makes sense that they are...6k comes out to 56 mph and I’m not doing 20 mph to that in 2 seconds. Maybe it’s doing more that I think it is, especially with the 3:23’s. I got a 100+ mile cruise this weekend. Maybe after that I’ll put the 3:73’s in and see how it feels.
View attachment 1715564696
Same tire as the OP, 245/60 15
I got a 2800 stall.
2800 stall is the tire smoker...but what are your camshaft specs?