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Discussion Starter · #1 · (Edited)
New V owner, always been a motorcycle and mustang guy. Decided to take a step into luxury with a 2016 V. As far as i can tell the car just has a 10% lower and LTH+ high flow cats. My ultimate goals are unknown atm but i do know i want a really fun street toy for now. I'm going to be shooting for 750ish wheel and room to grow in the future. I don't know much of anything about the platform or GM platforms in general.

I was thinking of doing a 2650 (kong or magnuson?), intake, catch can and meth. Would like to stay on pump gas for now. Obviously i know the 2650 is much more capable than 750 but i was thinking that is a solid start for a heads/cam package for 900whp in the future.

Just looking for input, from those more knowledgeable. Would that setup work or would i run into problems with fueling/air/cooling/breaking shit? What other supporting mods would i need for 750whp? Would i need to delete anything, balancer/dampener, 10 rib, throttle body, ect?
 

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New V owner, always been a motorcycle and mustang guy. Decided to take a step into luxury with a 2016 V. As far as i can tell the car just has a 10% lower and LTH+ high flow cats. My ultimate goals are unknown atm but i do know i want a really fun street toy for now. I'm going to be shooting for 750ish wheel and room to grow in the future. I don't know much of anything about the platform or GM platforms in general.

I was thinking of doing a 2650 (kong or magnuson?), intake, catch can and meth. Would like to stay on pump gas for now. Obviously i know the 2650 is much more capable than 750 but i was thinking that is a solid start for a heads/cam package for 900whp in the future.

Just looking for input, from those more knowledgeable. Would that setup work or would i run into problems with fueling/air/cooling/breaking shit? What other supporting mods would i need for 750whp? Would i need to delete anything, balancer/dampener, 10 rib, throttle body, ect?
Since no one has responded to this I have a couple of suggestions to get you started.

These engines respond to improving the induction system.
1) Camshaft
2) Better cylinder heads, either ported or aftermarket

I would do the above before moving to a larger Supercharger, as these
engine platforms use a 'Roots Style Blower' which does not deliver efficient
high boost, as do other forms of Forced Induction.

So before spending all that money on a larger blower, I would first move
forward to open up the restrictions within the induction system by changing
the cam and improving the cylinder head flow, as boost is simply a restriction
to flow.

You might desire to discuss the above with one of our members @Lt1z
who has helped out many on this forum who are new to considering
modifying this engine platform.

Also, possibly @random84 and other forum members might give additional comment. . . .

Good Luck..:)
 

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Since no one has responded to this I have a couple of suggestions to get you started.

These engines respond to improving the induction system.
1) Camshaft
2) Better cylinder heads, either ported or aftermarket

I would do the above before moving to a larger Supercharger, as these
engine platforms use a 'Roots Style Blower' which does not deliver efficient
high boost, as do other forms of Forced Induction.

So before spending all that money on a larger blower, I would first move
forward to open up the restrictions within the induction system by changing
the cam and improving the cylinder head flow, as boost is simply a restriction
to flow.

You might desire to discuss the above with one of our members @Lt1z
who has helped out many on this forum who are new to considering
modifying this engine platform.

Also, possible @random84 and other forum members might give additional comment. . . .

Good Luck..:)
Duck, since he had the LT4 I did not offer advice but glad to see you did.
 
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Listen to the Duck. My advice in the LS world which I think also applies to LT engines is to decide on your end goal before your first mod. That way if you build in stages you know that the mods will contribute to the final goal. For example, Rubber Duck said "Better cylinder heads, either ported or aftermarket." Knowing your end hp goal will help in making the decision between ported and aftermarket heads.
 
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Discussion Starter · #5 ·
Ok i appreciate the input guys.

Tire Wheel Car Vehicle Hood


This pic has no bearing on the discussion but i was THOROUGHLY impressed with the performance of the car today. Decided to make a run up to the dragon. For stock tires and 4200 lbs.....shes quite impressive around the corners.
 

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I wanted to stay on 93 only too no meth, I did the below mods and I’m at 675rwhp/670rwtq……if you port the stock blower, DSX low side, big gulp intake, and 102tb puts it close to 730rwhp on pump. A guy had the same car as me with those extra mods all work from same shop and that’s what the difference was. It’s expensive to make power on only 93. Much easier and cheaper to make same power with a blend of E.

SW headers and mid pipe to stock muffler
K&N intake
Stage 2 cam package
Ported heads
Lower pulley
DSX lid
C&R HX
Thermostat, DOD delete, and other small supporting stuff


Sent from my iPhone using Tapatalk
 

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I wanted to stay on 93 only too no meth, I did the below mods and I’m at 675rwhp/670rwtq……if you port the stock blower, DSX low side, big gulp intake, and 102tb puts it close to 730rwhp on pump. A guy had the same car as me with those extra mods all work from same shop and that’s what the difference was. It’s expensive to make power on only 93. Much easier and cheaper to make same power with a blend of E.

SW headers and mid pipe to stock muffler
K&N intake
Stage 2 cam package
Ported heads
Lower pulley
DSX lid
C&R HX
Thermostat, DOD delete, and other small supporting stuff


Sent from my iPhone using Tapatalk
Depending on the Dyno, with a 376 cid engine, ~750 to 775 hp is
considered good on pump gas, because that hp range represents
about 100% cylinder fill.

After that the little roots blower needs to move into compressible
flow as it must begin to compress the air in order to now 'Pack It'
into the cylinder.

Moving over to E85 can produce gains of 75 hp to 100 hp.

Cheers
 

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Listen to the Duck. My advice in the LS world which I think also applies to LT engines is to decide on your end goal before your first mod. That way if you build in stages you know that the mods will contribute to the final goal. For example, Rubber Duck said "Better cylinder heads, either ported or aftermarket." Knowing your end hp goal will help in making the decision between ported and aftermarket heads.
Good advice!

-and to help understand the above-
A 376 cid engine producing about 775 Hp is equal to 2.06 hp per cid.
A very good set of NA Cylinder heads will produce about 2.4 hp per cfm of flow.

If we take the stock flow of an V2 engine, which is about 290 cfm,
and our engine made about 660 hp, which is very common for
a V2 engine which does not have ported heads, we arrive at. ...
=> (660 / 290)= 2.54 hp per cylinder head cfm flow.

So at 660 hp we are doing a little bit better with the little
roots blower, than one would do with the highly efficient
NA Engine.

With heads that flow about 350 cfm at convergence lift, we
might be looking for 800 hp on 93 octane.

=> (800 / 350)= 2.29 cfm per hp.

Or even 900 hp with those same heads flow 350 cfm. . .
=> (900 / 350)= 2.57

And in summary; even though our engines have a small roots blower
which really helps the engine produce high torque values at low engine
rpm, these engines pretty much should be built / scaled the same way
we scale and build an high-perf NA Engine.

This is why I have offered the information / simple math above.

But please don't think I am suggesting one should use pistons
which would yield a 15.2:1 compression ratio,or an 0.900"
valve lift. . .lol
 

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Discussion Starter · #10 · (Edited)
So the car went in for ported heads, cam kit, meth, ported blower, intake, NW 103 tb, and low side fuel system. Should be a really fun street car after i get it back. Appreciate the input guys.
 

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I'm around that level and never thought about Meth
 
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I'm around that level and never thought about Meth
Raymond,
It must be tough having a life where you are always catching up..🤣🤣
 

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Raymond,
It must be tough having a life where you are always catching up..🤣🤣
Duck, I swear someone took over your keyboard a while back. You have become a comedian, not just a big math brain.
 

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I know! I was recently thinking... "When did Bruce suddenly become funny?!?"



Sent from my SM-G991U1 using Tapatalk
 

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Discussion Starter · #15 ·
Ive never used meth before but my understanding is its not REALLY for power, but mainly for IATs and some octane. Especially turning that stock blower so fast its good to keep them down? Plus it can help keep the insides clean.
 

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Meth is critical with the DI LT4 stuff in V3 because the hpfp cannot support much past 750whp on pump gas generally speaking.

Been doing my research as I look at buying an LT4 beast. Best thing to do is add port injection and a proper low side (lpfp) and let her rip.

A notable tuner nearby with a maggied c7z himself says 900whp is a happy place for the sbe.

Seriously considering buying a built long lock and swapping out the stock one while it’s still in one piece and worth something…if I buy the car that is ;)
 

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Seriously considering buying a built long lock and swapping out the stock one while it’s still in one piece and worth something…if I buy the car that is ;)
Do it.
 

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^^^^What he said.
 

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Ive never used meth before but my understanding is its not REALLY for power, but mainly for IATs and some octane. Especially turning that stock blower so fast its good to keep them down? Plus it can help keep the insides clean.
Meth makes 'Huge Power', much higher than even E85.

Pump E85 still uses ~15% 'Crap' gasoline, which impacts the MON rating.
A high MON rating is very important for a performance car.

No sense having a 105 RON, along with an 93 MON Octane rating. . . .

Meth also helps by reducing the required size of your Intercooler.

Cheers
 

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Discussion Starter · #20 ·
Meth makes 'Huge Power', much higher than even E85.

Pump E85 still uses ~15% 'Crap' gasoline, which impacts the MON rating.
A high MON rating is very important for a performance car.

No sense having a 105 RON, along with an 93 MON Octane rating. . . .

Meth also helps by reducing the required size of your Intercooler.

Cheers
So i get that like drag cars can run purely off of meth, but i thought the kits designed for our cars didnt really make all the power? Right, cause the gas is still the majority of the fuel?
 
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