MrPink
Bainisteoir Páirteanna
If you tune something it is no longer stock, your point is no longer valid.
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Yes and no! Its still a stock engine its just pulling potential out of it that the factory left on the table. Same as if you rejetted a carb or played with the advance curve on a carb engine. Optimize what you have and the results can be surprising.If you tune something it is no longer stock, your point is no longer valid.
The last L31 went into production vehicles in 06 or 07 in a GMT800. The 5.3L was a little cleaner, cheaper to build since it shared the LS architecture they were converting to. It was more GM not wanting to foot the bill to retool the small block tooling. The P59 L31 tune running my 97 has an 05 1-ton GMT800 vin.It's still no longer stock. It may have stock components but is not stock, untouched 5.7L to untouched 5.3L, it's a no brainer what engine runs and performs better. If it was the 5.7L then why did GM move away from it? Why did they stop supporting it in the OEM USDM world? GM Performance sure, but there has not been a vehicle made in the last almost 2 decades that had a 350 SBC based engine that was sold in the states. If I remember correctly the G-van was the last hold out of the production vehicles to get the L31 and that phased out in 04/05 I think.
Should have clarified, it was a Mexican truck. The last L31s I know of in vehicles in the US were in 2003 NPRs.Nope not here in the states it did not. The GMT800 platform did not see the L31 5.7L. It was the LU3,LR4,LM7,LQ4,L18.
Outside the US and Canada, in Mexico and S.A. They offered the L31 up until the start of the GMT900 platform.
And if you can prove me wrong BY VIN with a US based GMT800, by all means do so.
I'm no environmentalist or nothin', but wasn't there something to do with CAFE? I mean sure the 5.7 doesn't drink much more than the 5.3, but when seen as a whole picture of all the trucks produced with a 5.7 vs. 5.3, those MPGs saved will definitely add up. My guess is even though the 5.7 might have been better suited for truck stuff (ik this statement is argumentative), the 5.3 drank a little less, so it was a better candidate?...it's a no brainer what engine runs and performs better. If it was the 5.7L then why did GM move away from it? Why did they stop supporting it in the OEM USDM world?
"I'm gonna keep it stock this time, I swear"I must have missed something, but stock motor performance has no meaning to most of us as not even my cub cadet is left totally stock.
Carry on.