Best guess on 416 motor

[35regal]

i have the same cam in my stroker i think, ultradyne solid, 263/[email protected] 631/657 with a 1.6 rocker , i have 11.8 compression, ported eddy heads, flows [email protected], tunnelram,2-660s carbs, 4.10 with 28 tall tire. i havent had it to the track yet, the ring gear on the convertor went out to lunch after cam break-in, so i was down for a week and missed the last race day @ gateway international, i would like to say the 4.56 is to steep, and like you stated you are going to put the bigger carb. on it, it can handle the bigger carb. if it hooks 10.90 easy . if it hooks and no problems with fuel pressure on the other end, and if jetting is to lean. my 2-cents. my 418 pulls really hard, lots of torque. good luck keep us posted, p.s my cam is installed 2.5 degrees advanced. id go 4.10s if you drive it on the street.

 

[70aarcuda]

my 408 has a solid lifter Hughes 264/268 @ 103* using 1.6 rockers, compression is 11.9...ported eddy from Hughes..eddy victor intake...950 holley, turbo action 8 inch converter, gearing will be changed from 4.56 to 4.30 with 29.5 tire..
Hooker 1 3/4 headers, 904 trans...

the engine is still on the engine stand and will go in 71 dart in two weeks..picture from last wednesday night TnT

 

[flyfish]

I think you have a good shot at high 10's...heck, my 410 has a lot less cam, a dinky 750 carb, Air-gap intake, and it goes 10.90's. I believe you have a good shot at being in the 10's on a regular basis.

 

[w2360Duster]

I agree and think 10s are easily in reach with what you have but i think 4.56s are too much gear it will be 7000+ at the stripe. These 4.0" strokers have plenty of low end torque. Id go 4.10s unless you want to try a 29.5 tire as stated. What kinda converter do you have?

 

[Toluene56]

I have Dyno2003 and Drag2003... with the limited information and a very guessed flow chart for heads.. came about around 565+hp 490tq... With the drag calculator and information that you provided @ 800ft elevation it says [email protected] w/ slicks... 28" tall 10" wide... If you have detailed information on timing for the camshaft profile and a flow chart for the heads, I could give you a better estimate.

This program is cool.. it's usually pretty close.. nothing like real world.. but gives a good idea on a build. 8)


Ah, and 4.10's with a 28" tire traps about 6500rpm in the 1320.

 

[dusmon]

I agree and think 10s are easily in reach with what you have but i think 4.56s are too much gear it will be 7000+ at the stripe. These 4.0" strokers have plenty of low end torque. Id go 4.10s unless you want to try a 29.5 tire as stated. What kinda converter do you have?

Converter is a TCS 4200rpm

 

[Brian Hafliger]

258 @ .600"
This was with a 2.02 intake, a quickie bowl blend and our valve job, with no clay on the intake port entrance.

Remember too, many flow benches vary. It's not a flowbench "race", it's just data in my book to gauge improvements. Brian @ IMM sees 270 from his RHS @ .600 IIRC.

Do you use anything on the intake flange to setup the air into the intake port? If not, you'll always be off on your flow #'s. The air sheers on the edges of the port making it very turbulent all the way through the port and past the valve.
If you don't like clay or whatever, you should at least attach the intake manifold and clay the carb flange and flow it that way. JMO!!
Brian

 

[dusmon]

my 408 has a solid lifter Hughes 264/268 @ 103* using 1.6 rockers, compression is 11.9...ported eddy from Hughes..eddy victor intake...950 holley, turbo action 8 inch converter, gearing will be changed from 4.56 to 4.30 with 29.5 tire..
Hooker 1 3/4 headers, 904 trans...


What spark plugs is everyone using on these motors?

 

[1MeanA]

Are you using an R3 block?

 

[moper]

I use NGK V-groove or NGK race depending on the application.

 

[dusterdoug]

Do you use anything on the intake flange to setup the air into the intake port? If not, you'll always be off on your flow #'s. The air sheers on the edges of the port making it very turbulent all the way through the port and past the valve.
If you don't like clay or whatever, you should at least attach the intake manifold and clay the carb flange and flow it that way. JMO!!
Brian

My good buddy that owns the flow bench (and is the real head "head" in this equation) uses a wooden entry (radiused and smoothed of course) that is slightly larger than the port being flowed.

We didn't have time with the RHS heads, but I'd like to clay the EQ's that are up next and compare the numbers to the "woody"...

 

[crazy 340]

it should go high 10s

mine went 10.79 @ 128 mp/h

the engine is as follow

360 1973 block .040 over
scat rotating 4.0 stroke
h beam
flat top that give me 10.57 cr,
cam is .630 crane roller 272*int and 282*ex
108 center was at 106*
w2 race heads fully ported
1.6 harland sharp rocker
m1 crappy intake
750 cfm carbs with alote of work on it and give 835 cfm
1 7/8 tti headers

the car went 10.79 like said earlier in full trim with 28'' tire
4200 stall dynamic converter

ps. I did retard my cam a little last spring at 102 I lost alote on the mp/h
and gain a little on the 60 foot with the same et.

so it will go back to 106* so I will regain my mp/h

i did it at miramichi dragway new-brunswick

 

[dusmon]

No just a stock 340 block

 

[dusmon]

I use NGK V-groove or NGK race depending on the application.

Looking for heat range..and brand

 

[moper]

NGK, and somewhere around 6 for a street car with a big cam and no NO2. NGKs heat ranges are reversed... lower numbers are hotter plugs. Plus with some heat ranges you can get different hex sizes and extended or standard tip designs but you have to look a bit to find the right stock number for them. I use the SParkplugs.com website...lol. The BKR#E can be gotten from heat range 4-7, and with aluminum heads and moderate idle I want a hotter plug to stay clean. So something like BKR6E, stock #6962would be my first choice.

 

[sbmmustang]

it should go high 10s

mine went 10.79 @ 128 mp/h

the engine is as follow

360 1973 block .040 over
scat rotating 4.0 stroke
h beam
flat top that give me 10.57 cr,
cam is .630 crane roller 272*int and 282*ex
108 center was at 106*
w2 race heads fully ported
1.6 harland sharp rocker
m1 crappy intake
750 cfm carbs with alote of work on it and give 835 cfm
1 7/8 tti headers

the car went 10.79 like said earlier in full trim with 28'' tire
4200 stall dynamic converter

ps. I did retard my cam a little last spring at 102 I lost alote on the mp/h
and gain a little on the 60 foot with the same et.

so it will go back to 106* so I will regain my mp/h

i did it at miramichi dragway new-brunswick

You need more compression with that cam,stall and carb.
What does the car weight at race weight?
What did the W2 heads flow?
When I ran my W5 head 425ci I ran 14.23 comp cam Erson roller [email protected] ls 108 lift .720 degreed at 108 in a 3110# 69 Dart ladder bar car 29.5 M/T 10.5W drag 4.30 gear 727 5600 stall 8in converter(Coan).
1.29 60ft
6.16@112mph 1/8 mile
9.77@137mph 1/4 mile
I ran an Indy intake and a 1050 dom Erson Roller Rockers 1.6.
Same headers 1 7/8 dia.

 

[Rob Eppler]

Ten 70's are very possible. Many have written about the "engine" combo...I will tell you to ditch the 727 in favor of a good 904...it is worth .5 or more! Install a 2.74 low gear set, your 60' will improve and the car will ET nicely! 124 to 126 in the mph department, ET will depend on the "hook"

 

[dusmon]

Ten 70's are very possible. Many have written about the "engine" combo...I will tell you to ditch the 727 in favor of a good 904...it is worth .5 or more! Install a 2.74 low gear set, your 60' will improve and the car will ET nicely! 124 to 126 in the mph department, ET will depend on the "hook"

I hear you about the 904 but I already have the 727 and It lasts longer on the street. All input is greatly apprecated Thanks.

 

[dusmon]

Here are some of the parts. So the group says 4.10 gears 28" tire 950 Holley are the changes to put this toy together. Any thing else we miss. (I know 904 but not in the cards) What distributor is every one running?

 

[9secRR]

nice pics. got any more pics?

my guess on 1/4 time, 11.35@ 119mph.

 

[70aarcuda]

408 lying in wait...

has M1 intake just setting....going with either victor or super victor..

i know it is not my thread...but what the hell ...here are a few picture...along side is a 372 that has run 11.03 in the 71 Dart...

 

[EL5DEMON340]

Keep the 727, you wont get .5 or more, you may get a tenth to close to two tenths, talk to Cope racing trans with any ??

 

[tvt59]

Try taller tires if you can. I have a Biggs stage 5 1050 4150 series. I'll say 10.60 @ 124mph.

 

[dusmon]

Nice motor good to see it.
Here is were I'm at....

408 lying in wait...

has M1 intake just setting....going with either victor or super victor..

i know it is not my thread...but what the hell ...here are a few picture...along side is a 372 that has run 11.03 in the 71 Dart...

 

[pettybludart]

Here are some of the parts. So the group says 4.10 gears 28" tire 950 Holley are the changes to put this toy together. Any thing else we miss. (I know 904 but not in the cards) What distributor is every one running?

I,m running all MSD distributor,cap,6AL box with rev limiter pills,8.5mmm wires.I think with the 29.5 slicks and the 4.30 gears,you should be in the high 10,s.Might want to see if your cam,t.convertor matches with tire size an gears.If not,slap a roller cam in it.JMO.:cheers: