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  #13  
Old 01-30-2015, 11:12 AM
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Re: Another 5.7L issue.

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Originally Posted by Sleeps View Post
As for the intake.. he just hates them and wants everyone to hear why. I know a few guys who arnt running tunes with ported TBs. No problems that i know for them and this is to serious of an issue that no one else has raised a flag to before. I am all for people getting tunes to get a better performing engine but for a ported tb only? No way.
Lmao has he preached this stuff before in another thread? because honestly I installed the catch can, TB and intake, all around the same time, within the same month. iv had these 3 items installed for almost 15K miles now with no CEL's, no break downs, no starting issues, no gas mileage problems what so ever. the truck as about 22K on it now. and this weird issue which was in the original post is the only random, not often, non replicatable problem I've ever had with the truck, which I think is directly related to oil getting into the intake manifold via the catch can.

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  #14  
Old 01-30-2015, 11:37 AM
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Re: Another 5.7L issue.

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Originally Posted by dmsfun View Post
To the OP, I would immediately put the stock TB back on, and also put the stock air intake back on, with a new filter of course, and reset the ECU by disconnecting the battery neg while doing the swap. They charge a lot of cash on those items, but it is marketing BS. I guarantee you will notice how much better, faster, and quieter it drives right away. The 87 TB loses low end torque and also needs custom dyno tune for A/F as with stock tune it runs too lean, which could blow it up. I ditched the AFE II as I found out it is a total waste of money, slower than stock plus all that noise gets old quick.

I'm sorry... What? You've got some serious misconceptions bud. First of the intake of the engine that it uses to calculate A/F off of is from the map sensor on the back of the intake manifold. A ported tb isn't gonna affect that in anyway. A ported tb only increases throttle sensitivity and possible provides somewhat of a more optimized airflow. TBH im not a big fan of CAI's either...


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  #15  
Old 01-30-2015, 12:08 PM
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Quote:
Originally Posted by greenwayer View Post

I'm sorry... What? You've got some serious misconceptions bud. First of the intake of the engine that it uses to calculate A/F off of is from the map sensor on the back of the intake manifold. A ported tb isn't gonna affect that in anyway. A ported tb only increases throttle sensitivity and possible provides somewhat of a more optimized airflow. TBH im not a big fan of CAI's either...

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Old 02-09-2015, 12:51 PM
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Re: Another 5.7L issue.

Quote:
Originally Posted by greenwayer View Post
I'm sorry... What? You've got some serious misconceptions bud. First of the intake of the engine that it uses to calculate A/F off of is from the map sensor on the back of the intake manifold. A ported tb isn't gonna affect that in anyway. A ported tb only increases throttle sensitivity and possible provides somewhat of a more optimized airflow. TBH im not a big fan of CAI's either...


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When I spoke with the Hemi experts at Modern Muscle, they told me to go with the 85mm for street use, as drivability is great all around since the variable porting preserves low end torque. I already had a tuner at that time, but he said the 85mm requires no dyno tune for logging A/F, whereas the 87mm TB needs this, as it runs too lean at WOT. While a richer than stoich A/F won't blow the engine, too lean can. For further explanation please contact them for details.
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  #17  
Old 02-09-2015, 12:56 PM
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Re: Another 5.7L issue.

Quote:
Originally Posted by Sleeps View Post
As for the intake.. he just hates them and wants everyone to hear why. I know a few guys who arnt running tunes with ported TBs. No problems that i know for them and this is to serious of an issue that no one else has raised a flag to before. I am all for people getting tunes to get a better performing engine but for a ported tb only? No way.
Perhaps my post was confusing; you are correct that no tune is needed, with an 85mm TB, it is however needed for dialing in A/F on an 87mm, according to the the supplier at Modern Muscle.
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