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Re: BB Street heads for mild 505
[Re: AndyF]
#2634803
03/20/19 12:19 PM
03/20/19 12:19 PM
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451
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OP
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Chicago, IL
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I know you cheated. I saw a second grader sitting at your computer earlier.
On a somewhat related note, I've dyno tested two 500 inch Mopar big blocks this week with Trick Flow 240 heads and hyd roller cams. Both engines required a bunch of fuel and timing at cruise to keep from burning up the exhaust. The big problem was right around 2000 rpm with a slight load. Roughly equal to driving down a flat freeway at 70 mph. The tune file that was working in my Coronet last summer would not work in either of these engines. The EGTs would go skyhigh and the engine would shut down. We ended up adding a bunch of timing (35 to 40 degrees) and adding some fuel and then they were happy.
I do not know what is going on but I suspect it has to do with how well the Trick Flow 240 heads flow at low lift. Perhaps the intake charge is getting sucked into the exhaust or something like that. Anyway, just keep an eye on your engine if you are out cruising on the freeway. Your carb might fat enough already but I really doubt you have much ignition advance at 2000 rpm since you don't have vacuum advance on that MSD. So you are probably running low to mid 30's and you don't have any way to get more advance than that. That's great info Andy. I did change the advance bushing in the dist should give me about 20 degrees initial at 36 total. Also swapped out the springs to lighter ones. Funny you say this because on initial startup for cam break in, ( although it started up perfectly on my initial dist setting), the header tubes started to glow after a couple minutes. It was running great so my buddy wasnt quick on the timing light. Once he noticed the headers glowing I just shut it down. Started back up and and saw the timing was at 30. Bumped it up to 34 and glowing stopped and was fine for the remainder of cam break in. Not sure where jetting is at, but I'll definitely keep an eye on that too. I only drove it a couple miles and no freeway time yet. All i know is it feels much faster than the old set up.
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2634806
03/20/19 12:27 PM
03/20/19 12:27 PM
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451
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Chicago, IL
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Thanks Zippy, Brad, GY3, BSB67, Krautrock, MarkM and Fast68 for the nice words. A special thanks to Dwayne for the custom Comp cam and also for your great technical advice . As for the exhaust tone, I also agree the new set up sounds better. Hard to tell from the videos, but the solid ft is not much noisier at all. The car overall is louder, but I am OK with that  .
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: BradH]
#2634906
03/20/19 05:05 PM
03/20/19 05:05 PM
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451
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Chicago, IL
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When are you planning to do the carb swap? Maybe this weekend or Monday, if weather cooperates. I'm looking forward to it! I'll definitely keep you posted.
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2636797
03/25/19 08:30 AM
03/25/19 08:30 AM
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Joined: Jan 2003
Posts: 17,836
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,836
S.E. Michigan
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No way, Brad. Running great ootb, but I do appreciate the extra tuning parts you uncluded w the carb. See, here's video proof of it running with the Brad950...it's been road tested too and pulls strong w no stumbles or hesitation https://youtu.be/BaOzBbh5YNg I greatly prefer that idle quality and rpm to the other two  But I tend to like it on the faster side. Here is a link to my pile-0-Krap (Brad helped me out as well, with calibration advice) https://www.youtube.com/watch?v=iB34vRlCKtQ
Last edited by ZIPPY; 03/25/19 08:36 AM.
Rich H.
Esse Quam Videri
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Re: BB Street heads for mild 505
[Re: ZIPPY]
#2636810
03/25/19 09:03 AM
03/25/19 09:03 AM
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451
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OP
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
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No way, Brad. Running great ootb, but I do appreciate the extra tuning parts you uncluded w the carb. See, here's video proof of it running with the Brad950...it's been road tested too and pulls strong w no stumbles or hesitation https://youtu.be/BaOzBbh5YNg I greatly prefer that idle quality and rpm to the other two But I tend to like it on the faster side. Here is a link to my pile-0-Krap (Brad helped me out as well, with calibration advice) https://www.youtube.com/watch?v=iB34vRlCKtQ Yeah, the other videos were taken a little prematurely when the car was cold. Brad also reminded me I should try to keep the idle up at least 1k to try to keep as much oil splashing on the solid ft cam. Your car sounds awesome! Definitely something serious under the hood
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2636819
03/25/19 09:10 AM
03/25/19 09:10 AM
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Joined: Jan 2003
Posts: 17,836
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,836
S.E. Michigan
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Cold explains alot of it, then. Agree 100% for oiling, and thanks...just thought it'd be fun to compare, I clicked back and forth between yours/mine a couple times
Last edited by ZIPPY; 03/25/19 09:11 AM.
Rich H.
Esse Quam Videri
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Re: BB Street heads for mild 505
[Re: ZIPPY]
#2636830
03/25/19 09:21 AM
03/25/19 09:21 AM
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Joined: Jan 2003
Posts: 4,296
Chicago, IL
TonyS451
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Chicago, IL
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Cold explains alot of it, then. Agree 100% for oiling, and thanks...just thought it'd be fun to compare, I clicked back and forth between yours/mine a couple times I just tried that too. Your car sounds better IMO. Its got a little more chop to it, which I like. Car looks sweet too, a classic mopar street beast! Checking the gas station for victims ...
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2637236
03/26/19 07:47 AM
03/26/19 07:47 AM
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Joined: Jan 2003
Posts: 17,836
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,836
S.E. Michigan
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Cold explains alot of it, then. Agree 100% for oiling, and thanks...just thought it'd be fun to compare, I clicked back and forth between yours/mine a couple times I just tried that too. Your car sounds better IMO. Its got a little more chop to it, which I like. Car looks sweet too, a classic mopar street beast! Checking the gas station for victims ... Ah, it's probably just smaller CI and bigger (duration) cam. The body is pretty bad. ...It looks best in the dark  But thank you just the same
Rich H.
Esse Quam Videri
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Re: BB Street heads for mild 505
[Re: ZIPPY]
#2638158
03/28/19 04:24 PM
03/28/19 04:24 PM
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Joined: Aug 2006
Posts: 614
Michigan
Get-X
mopar
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mopar
Joined: Aug 2006
Posts: 614
Michigan
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Cold explains alot of it, then. Agree 100% for oiling, and thanks...just thought it'd be fun to compare, I clicked back and forth between yours/mine a couple times I just tried that too. Your car sounds better IMO. Its got a little more chop to it, which I like. Car looks sweet too, a classic mopar street beast! Checking the gas station for victims ... Ah, it's probably just smaller CI and bigger (duration) cam. The body is pretty bad. ...It looks best in the dark But thank you just the same I've heard the same thing about my body as well...…...and the car too 
'65 Belvedere
'68 GTX
'57 Dodge pickup
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