408 top end changes, new trick flow heads??

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340Duster247

340Duster247

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Hey guys so I've decided to make some big changes to the 408. Finally gonna ditch my hydraulic flat tappet cam and go with a solid roller. Ive yet to decide on the Lunati 40200734 or a custom grind from bullet. I'm also going to be ditching the PRW aluminum 1.6 roller and upgrading to either their stainless set up or the comp pro Magnums 1622.

I then got to looking at the new trick flow 190cc heads. I currently have "local guy" ported eddy 65cc heads. I've heard really good things about the trick flows but my concern is the 60cc chamber. My compression right now is 11.48:1 with the current set up. (Icon flat tops 5cc, felpro 1008, .005 deck)
Now I know very little about quench and I'm not sure what can be done so that my compression isnt too high for 94 octane pump gas.
Can chambers be opened up a little?
Thicker head gasket?
Or is 12.3:1 compression ok for 94 octane?

Here's my combo:
408 stroker 150-200 shot nitrous
Icon flat tops 5cc
Camshaft (????)
Port match super victor intake
Frank Lupo Dynamic 9" 4300 stall
4:30 gear
28" tall tire

Thanks for any advice..

IMG_20190923_081147_770.jpg
 
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Ugh. My next engine will be 12:1 on pump gas with iron heads. But I won't be using an off the shelf cam, nor anything from Bullet.

That said, I *think* you can do it IF you order the correct cam (not a big one, not a catalog cam but the correct, custom cam with the correct amount of duration and the timing set for the CR) and have your tune up dead nuts on.

An MSD 6 box would not be my choice of ignition. It better be a 7 so you can lean things at a cruise to clean it up, and still have enough ignition to fire it. And have enough ignition at idle.

And, you can't just guess at your carb. If you aren't comfortable tuning the carb, send it to someone who knows what they are doing, tell them what you are doing and let them get it close. You may have to change an idle air bleed, a main jet or something easy like that, but it will be much easier than guessing and being frustrated.

If you can do all that, I think you can do 12:1 on pump gas. Again, if you are thoughtful and careful.
 
agree with YR
contact Mike jones on that solid cam
his software will confirm if your combo will work
keep the quench tight
IDK about those heads and opening the chambers
anyone?
but I can usually find 5cc easily without laying back the piston shapes
 
79410aspenrt said:
what's your 1/4 mile times now?
Click to expand...
Been having big issues where the car won't rpm past 5800...valvetrain problems, won't get into here since I have another thread going where we've been discussing the issue .... But the car has gone 11.6 N/A @3800ft valvefloating anything above 5800rpm..so short shifting 1 and 2 and before the time you get to the traps , it's like hitting a rev limiter. Lol
 
340Duster247 said:
Been having big issues where the car won't rpm past 5800...valvetrain problems, won't get into here since I have another thread going where we've been discussing the issue .... But the car has gone 11.6 N/A @3800ft valvefloating anything above 5800rpm..so short shifting 1 and 2 and before the time you get to the traps , it's like hitting a rev limiter. Lol
Click to expand...



Man I had that issue with a factory Mopar ignition box many years ago. Spent a lot of money finding out mother Mopar had rev limiters in some of her boxes. We didn’t have websites like this back then.
 
340Duster247 said:
Hey guys so I've decided to make some big changes to the 408. Finally gonna ditch my hydraulic flat tappet cam and go with a solid roller. Ive yet to decide on the Lunati 40200734 or a custom grind from bullet. I'm also going to be ditching the PRW aluminum 1.6 roller and upgrading to either their stainless set up or the comp pro Magnums 1622.

I then got to looking at the new trick flow 190cc heads. I currently have "local guy" ported eddy 65cc heads. I've heard really good things about the trick flows but my concern is the 60cc chamber. My compression right now is 11.48:1 with the current set up. (Icon flat tops 5cc, felpro 1008, .005 deck)
Now I know very little about quench and I'm not sure what can be done so that my compression isnt too high for 94 octane pump gas.
Can chambers be opened up a little?
Thicker head gasket?
Or is 12.3:1 compression ok for 94 octane?

Here's my combo:
408 stroker 150-200 shot nitrous
Icon flat tops 5cc
Camshaft (????)
Port match super victor intake
Frank Lupo Dynamic 9" 4300 stall
4:30 gear
28" tall tire

Thanks for any advice..

View attachment 1715407358
Click to expand...
^^Car is kick *** , or kick a$$ !!
 
79410aspenrt said:
save some $ and get a solid flat tappet cam from Hughes. with your RPM heads and 11.48:1 compression, you should be 10.50's N/A with this cam.
Hughes Engines
Click to expand...
79410aspenrt said:
save some $ and get a solid flat tappet cam from Hughes. with your RPM heads and 11.48:1 compression, you should be 10.50's N/A with this cam.
Hughes Engines
Click to expand...

Going solid roller. But either way a camshaft swap is definitely a must. Should of done it along time ago.
 
Hughes does not grind cams
if you are getting a solid or HR get a quote from Mike Jones
his inverse radius lobes and software are the best
post what he recommends but bvvc comparing with a flat flank roller
 
Wyrmrider said:
Hughes does not grind cams
if you are getting a solid or HR get a quote from Mike Jones
his inverse radius lobes and software are the best
post what he recommends but bvvc comparing with a flat flank roller
Click to expand...

i never said Hughes did grind there own cams. whether you like Hughes or don't like them, there cams do make power.
 
I believe with your stroker pkg and 65cc chambers you will be around 11.8 :1 comp.
 
all cams make power
look at all the suggestions for obsolete chevy profiles on this and other boards
Hughes you get a cam picker with some MOPAR experience and Mopar lobes
more power than the universal grinds
however in most cases a custom will be even more optimal
but price and delivery do make a difference
 
Pretty sure the cam in my 422 is a Hugh’s grind solid lift cam. Can’t guarantee it because I bought everything in a group buy with block and heads. Heading out the door to my last big race of the year or I would check the box. It came with Shubeck lifters but I sold them and bought EDM lifters. It’s gone 9.42 with that cam in a bracket race friendly combo.
 
We do know Hughes repackages cams for profit... if you like one of their grinds just send your cam to a cam grinder and have them grind it to that spec for $79...
I'm having some of the same concerns you are with compression. I will say it was suggested using a Fel Pro I believe 8553 which has a .53 gap instead of the 1008's .39..... of course that's the budget route obviously you can get a cometic gasket to any thickness you want to pay for.. I think I said this on your other thread earlier but you have a pretty nice combination that just needs a little more sorting out and careful of "trick flow fever" too quick...
 
Do some research about compression ratio at altitude. Thin air requires more squeeze to make power. If you can tune it can be done. I would stick with .040 quench.
 
mderoy340 said:
Do some research about compression ratio at altitude. Thin air requires more squeeze to make power. If you can tune it can be done. I would stick with .040 quench.
Click to expand...
Good call I forget when I'm talking to people like in Colorado or Wyoming or somewhere...
 
mderoy340 said:
Do some research about compression ratio at altitude. Thin air requires more squeeze to make power. If you can tune it can be done. I would stick with .040 quench.
Click to expand...
Yeah I've been chatting with a friend of mine who builds very fast very nice Mopars and does badass engines for customers as side work. He's who knows the guys a Bullet and thinks I should get them to grind me a cam , but hes confident 12:1 on 94 pump gas is fine, run race gas at the track. "That small block will like it, be nasty on 12:1"

I also forgot to mention that Holley software runs my setup, so I can always pull timing where needed
 
good frigging luck making a decent remaster from a performance cam
we used to do it for Production Engine Rebuilds
If Hughes is using Howard to grind his cams I would not try and duplicate
maybe some chevy master
 
Wyrmrider said:
good frigging luck making a decent remaster from a performance cam
we used to do it for Production Engine Rebuilds
If Hughes is using Howard to grind his cams I would not try and duplicate
maybe some chevy master
Click to expand...

Last i heard( and its been a while) they were using Engle
Never heard of them using Howards.
 
They used to use Engle, see their archives for specs
I'm guessing Howards looking at the specs
speaking of howards
https://www.howardscams.com/sites/default/files/Howards2016_17_mid.pdf
and compare Mopar grinds with the 15 in the cam notes with the other universal grinds
LA
page 140 on computer 142 on paper for hyd and 142 or 144
solids 144 computer- 145 paper catalog printed on page
Other vendors also mix .904 and .842 lifter optimized masters
Crower, Crane - but do not make it easy for you to pick the good ones
I compare specs with SBC- if the same or similar I pass
Or go to their masters list and find the matching master
about that time I get a custom cam if I have time or find something similar as looking at several vendors I can find various timings- LCA's
or different spring recommendations
 
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