Lingenfelter voices concerns over the new LT1

Mook

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"According to Lingenfelter, the production versions of the LS engine still leave a lot of room for performance improvement, they’re nowhere near the limits of the performance envelope. From what he’s learned about the new LT1, Lingenfelter fears that the motor, which has the highest specific output of any GM engine ever, 450 HP and 450 lb-ft of torque from 6.2 liters of displacement, may be closer to the limits of its performance envelope in production form than the LS. No doubt the LT1′s architecture can handle the 600 or 700 HP that the eventual ZR1 edition of the C7 will have, but 700 HP is commonplace in the LS tuning world and Lingenfelter is concerned that they may not be able to wring much more than that out of the new Corvette engine. "

Ken Lingenfelter: New LT1 Engine A Challenge for Tuners | The Truth About Cars
 

Wrencher

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Sep 11, 2011
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I can see the concern.
The amount of delivered fuel is dependent upon fuel pressure from the high pressure pump not pulse width.
It's easy on port fuel to bump the pressure up to 65+ & run big injectors.
Direct injection, no other injectors available, cant get more pressure than the stock high pressure pump can push.

hrdp-1302-04_2014-chevrolet-lt1-v8-engine_direct-injection-system.jpg


There are other direct injected engines out there that have high pressure pump upgrades.
The LT will need the same at the least.

So high boost cars are not really going to be able to be a reality until the fuel system upgrades are available or convert back to port fuel.

Pretty sure the big power #'s wont come from these until the aftermarket steps up to support it.
 

02BlueGT

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I can see the concern.
The amount of delivered fuel is dependent upon fuel pressure from the high pressure pump not pulse width.
It's easy on port fuel to bump the pressure up to 65+ & run big injectors.
Direct injection, no other injectors available, cant get more pressure than the stock high pressure pump can push.

hrdp-1302-04_2014-chevrolet-lt1-v8-engine_direct-injection-system.jpg


There are other direct injected engines out there that have high pressure pump upgrades.
The LT will need the same at the least.

So high boost cars are not really going to be able to be a reality until the fuel system upgrades are available or convert back to port fuel.

Pretty sure the big power #'s wont come from these until the aftermarket steps up to support it.


Knowing GM, a larger pump from one of the big deisels will be a direct bolt-in.

This motor will end up in the pickups and camaro soon enough. The smart performance companies will get on engineering that pump. All cars will be DI soon enough, These are the same woes and worries that performance companies had during the switch from carb to TBI, and from TBI to port injection. Technology changes, keep up or get out of the way.
 

Stink Star

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A version of that motor s already in the trucks, I know because I've driven a few already.

As far as modifications are concerned, yes.... It will be more difficult with the DI, but not impossible. Other companies modify DI cars so we know its possible. Just not easy but I'm sure somebody will either come out with an upgraded pump or injectors and then it will be a non issue
 

Wrencher

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Knowing GM, a larger pump from one of the big deisels will be a direct bolt-in.

Trying to think of what pump that is? All the DM pumps are timing gear driven?

I think the aftermarket will step up, but this will be a longer leap than those of the past.

The current cam lobe driven plunger pump may need some real help to produce more PSI & survive.
Don't wanna start taking cams out like VW's DI engines problems of recent history.
 

Ear Rak

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Trying to think of what pump that is? All the DM pumps are timing gear driven?

I think the aftermarket will step up, but this will be a longer leap than those of the past.

The current cam lobe driven plunger pump may need some real help to produce more PSI & survive.
Don't wanna start taking cams out like VW's DI engines problems of recent history.

Duramax = CP3 bosch pump. Pretty sure its gear driven, but theres a few companies that make pulleys so they can be belt driven.
 

Turbocharged400sbc

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well they are sorta bitching that things are better engineered.

even the factory figured out that you can wring every last bit of power out....and with the new systems still have it live.

im betting they are more pissed that there's not alot left on the table without significant component upgrades...

the cam could be made with 4 lobes instead of 3 or a higher stroke...

id bet someone will run a slightly modified belt drive duramax cp3 at some ridiculous rail pressure (remember that big fucking pulley and pump on the truck motor pics a while back?) and knock down at least 30-40% more fuel/power FI without touching injectors.

there arent many but some bosch systems have been run at nearly twice design pressure

but since its gas id bet someone slaps inj bungs in an intake for some piggyback shit or straight up foggers
 
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