[?] '18 Intake Manifold on '15-'17

[strengthrehab]

I am, but only because my engine is apart due to a broken valve spring, anyway. Seemed like a good idea.

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[BmacIL]

Anybody upgrade their OPG's (oil pump gears) with the 18' manifold setup?

I know they're prone to breaking when introducing more RPM's due to the vibration and harmonics.

Keep it under 8000 and don't bounce off the limiter or get bad wheel hop at high rpm and you'll be fine, but it is a good idea if you're already diving into the engine.

 

[heyitzkhan]

Keep it under 8000 and don't bounce off the limiter or get bad wheel hop at high rpm and you'll be fine, but it is a good idea if you're already diving into the engine.

I've had a bad habit of taking the car up closer to 8K RPMs with the new manifold on pulls. I'm going to have to ease off and shift closer to 7,600.

 

[strengthrehab]

Peak power is at approximately 7500 no?

 

[BmacIL]

Peak power is at approximately 7500 no?

More like 7250-7300 actually, but you don't want to shift at peak power. For the best acceleration you want to shift a few hundred revs over peak power, depending on the gear spread, as you want to drop back to just a bit below peak, rather than far below it. Shifting at 7500-7700 with this manifold and stock cams will deliver optimum acceleration. With the stock manifold, shifting at anything over 7200 doesn't get you much.

 

[heyitzkhan]

Peak power is at approximately 7500 no?

Yes but when racing. Having those extra RPMs help with momentum. Meaning it helps to continuous carry the powerband throughout the next gear in manuals. I will admit 8k is a bit much so that's why I'm going to step it down a little.

Peak power is at approximately 7500 no?

 

[heyitzkhan]

More like 7250-7300 actually, but you don't want to shift at peak power. For the best acceleration you want to shift a few hundred revs over peak power, depending on the gear spread, as you want to drop back to just a bit below peak, rather than far below it. Shifting at 7500-7700 with this manifold and stock cams will deliver optimum acceleration. With the stock manifold, shifting at anything over 7200 doesn't get you much.

Well said.

 

[Dr. Norts]

What do most of you guys have your rev limiters set to?

 

[heyitzkhan]

What do most of you guys have your rev limiters set to?

I suggest setting the limiter high so that you don't accidentally hit it and cause catastrophic failure to your OPG's. Palm Beach Dyno set mines at 8100 RPM's. Haven't had any issues thus far.

 

[Dr. Norts]

I suggest setting the limiter high so that you don't accidentally hit it and cause catastrophic failure to your OPG's. Palm Beach Dyno set mines at 8100 RPM's. Haven't had any issues thus far.

That's what I've done. I still have the stock intake so I've set mine to 8k. Far enough away from where I shift for a little buffer so I'll never hit it, hopefully. If I do hit it oh well, these things happen.

 

[strengthrehab]

I just put in my order for Lund so I hope they put it at a fairly high number just to make sure I don't hit it, even with my upgraded OPG

 

[Dr. Norts]

I just put in my order for Lund so I hope they put it at a fairly high number just to make sure I don't hit it, even with my upgraded OPG

So with Lund you can't change it ever once they set it within the tune??

Once AED sends you your final tune you can set your rev limit / transmission shift pressure +/-25% by gear / gear ratio / tire size before loading on the tune. Just a tidbit of info.

 

[ahl395]

I just put in my order for Lund so I hope they put it at a fairly high number just to make sure I don't hit it, even with my upgraded OPG

You can request it to be whatever you want from Lund

 

[BmacIL]

Finally got the car on a dyno.
423 whp SAE
18 manifold (not ported)
AED 93 octane tune
GT350 CAI
Corsa catback, stock headers and cats

Added dyno pull video:

 

[strengthrehab]

That will be my combo except adding Long tubes, different catback and Lund tune.

I'd guess another 15-20 hp from the headers?

How does it feel?

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