Plenum Spacer for your LLT

[KMPrenger]

Go go go go go go go go go...hapi...

[h2oplay]

I have the 25mm insulator, it doesn't look like the plenum spacer will fit because of the back bolt....

[MACE_ENG]

Guys,

My apologizes for the delay in chiming into this thread, I'll do the best I can to answer your questions/statements

Originally Posted by Cyber Gray

No dyno number, but I have Jennifer Lopez number if you are interested .

Please share LOL

Originally Posted by GasTires&Oil

Can I get a price on the plenum spacer and bolt kit for 3/8" spacer 35244 please.

Will PM shortly

Originally Posted by mhog

Has any of the spacer shipped yet?

A hand full have, however about 12 will be packed ready for shipping tomorrow

Originally Posted by RS_Man

Can I get a price on the plenum spacer shipped to 45409 thanks!

Will PM shortly

Originally Posted by hapisok

yesh...

Go hapisok

Originally Posted by bmorecam

That's not an issue. plenum spacer is one of the easiest part to swap. 8 bolts and about 15 minutes is all it take, but more numbers from different peoples is always a good thing

go hapi go LOL

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Big job but someone has to do it LOL

Originally Posted by h2oplay

I have the 25mm insulator, it doesn't look like the plenum spacer will fit because of the back bolt....

It will fit BUT, the plenum spacer profile has been designed such that it doesn't need the rear most bolt on the plenum for it to seal, when used in conjunction with the supplied silicone, to make fitment easier

[CamaroC-17]

Alright Mace I have some questions. I have been reading all these different threads and just need to clarify some things. I will be ordering the Plenum spacer and 25mm manifold spacer. What else do I need to order? Also I will be adding the VRAM intake. Should I get an updated tune from Vince? Any noticeable gains with a tune vs. No tune?

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[MACE_ENG]

Originally Posted by camaroc5

Alright Mace I have some questions. I have been reading all these different threads and just need to clarify some things. I will be ordering the Plenum spacer and 25mm manifold spacer. What else do I need to order? Also I will be adding the VRAM intake. Should I get an updated tune from Vince? Any noticeable gains with a tune vs. No tune?

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"Alright Mace I have some questions. I have been reading all these different threads and just need to clarify some things. I will be ordering the Plenum spacer and 25mm manifold spacer. What else do I need to order?"
In regards to parts/components nothing as it all comes in the kit

"Also I will be adding the VRAM intake. Should I get an updated tune from Vince?"
For the VRAM definitely, for the spacers it's not as urgent.

"Any noticeable gains with a tune vs. No tune?"
Not a huge amount, though I'm sure others will be able to chime in based on their direct experience

If you have any more questions please don't hesitate to ask.

Kindest Regards,
Steve

[h2oplay]

Thanks Steve

BTW, love the 25mm insulator, unreal difference...

[KMPrenger]

Originally Posted by camaroc5

Alright Mace I have some questions. I have been reading all these different threads and just need to clarify some things. I will be ordering the Plenum spacer and 25mm manifold spacer. What else do I need to order? Also I will be adding the VRAM intake. Should I get an updated tune from Vince? Any noticeable gains with a tune vs. No tune?

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Also, to get the VRAM to work with the 25mm insulator properly, you may need to shave down and angle the horn of the intake a bit like bmorecam did to his.

[bmorecam]

With our LLT theres such a small room to play with when it come to tuning. The only way tuning come into play is when a mod skews the current adjustment such as your fueling and air flow, and that's when tuning can come in play to correct the adjustment back to suitable level. I notice that most peoples think you are supposed to get tuned for each new mod you do. This is not true and it does not work that way with our LLT. There are 3 very basic things that's mainly changed. Those are, fueling, air flow, and spark. All these things can be looked at through datalog, with the exception of your air and fuel ratio which can only be looked at with a wideband meter. Its very important to keep your eye on these things because one thing can always skew the other.

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[Mach]

Bemore.. that makes sense.

But if tracy sees the knock reduced by 80% at high rpms (Plenum Intake) then he is able to run more timing. Increasing HP.. Correct?

[bmorecam]

If the knock is reduced, it's going to advance more timing on its own on this ecm. MBT on this engine is between 26 to 30. Sweet spot seem to be right around 28* and with the tune the timing does not go pass 32* on wot it seems. Anything over that ignition advance you are not going to make more power. We tested this over and over on the dyno with same scenario. Reducing knock on this engine basically just keep the power more stable and constant. This is one stubborn and very stingy ecm, but it also goes to show how well GM already calibrated from factory.

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[Mach]

Originally Posted by bmorecam

If the knock is reduced, it's going to advance more timing on its own on this ecm. MBT on this engine is between 26 to 30. Sweet spot seem to be right around 28* and with the tune the timing does not go pass 32* on wot it seems. Anything over that ignition advance you are not going to make more power. We tested this over and over on the dyno with same scenario. Reducing knock on this engine basically just keep the power more stable and constant. This is one stubborn and very stingy ecm, but it also goes to show how well GM already calibrated from factory.

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Great!! So its smart enough to do it on its own. Thanks for the explanation.

[bmorecam]

Anytime mach

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[Ventmaster]

Originally Posted by h2oplay

I have the 25mm insulator, it doesn't look like the plenum spacer will fit because of the back bolt....

Pic of plenum spacer w/25mm installed on page 3 of this thread .

It is very close!!

[h2oplay]

Originally Posted by Ventmaster

Pic of plenum spacer w/25mm installed on page 3 of this thread .

It is very close!!

Wow. it's close now without the PS, It looks like I'll have to remove the manifold that's on the 25mm now to be able to add the PS.

If the hype about this produces the same type of gain the 25mm did, it's worth the cost/trouble.....