[gtfoxy]

Originally Posted by Choda

We are talking about LT 5.3 not LS.

I also change my oil at 50% in the dash info. oils cheap compared to turbos and engines.

Gotcha.

[KingLT1]

L83 5.3 to be exact.

[supersportss]

I live down the street from Thompson Motorsports, their engines are really really good, I would not use TSP any longer their quality has suffered in recent years.

[Umbriel]

Originally Posted by supersportss

I live down the street from Thompson Motorsports, their engines are really really good, I would not use TSP any longer their quality has suffered in recent years.

This makes me feel better about ny choice.

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[KingLT1]

Originally Posted by supersportss

I live down the street from Thompson Motorsports, their engines are really really good, I would not use TSP any longer their quality has suffered in recent years.

I have heard good things about Thompson as well.

[laynlo15]

Have you decided if your going to do a stroker?

[Choda]

Originally Posted by laynlo15

Have you decided if your going to do a stroker?

Not sure as of now. I talked to Thompson. They have a 416 forged crank, rods, pistons, arp hardware, oil pump, their stage 3 cam (240 246 0.630 0.630 116.5+6), timing set - rated to 1100 flywheel with a 12 month warranty for $8500. Its a bit of money but hard to beat that 12 month warranty with 950 rwhp. Add heads and Im sitting around $10K.

A factory LT4 with a cam kit for ~$8500

LT1 with drop ins and cam kit for ~$7000

[L78toLT1]

Originally Posted by Choda

Not sure as of now. I talked to Thompson. They have a 416 forged crank, rods, pistons, arp hardware, oil pump, their stage 3 cam (240 246 0.630 0.630 116.5+6), timing set - rated to 1100 flywheel with a 12 month warranty for $8500. Its a bit of money but hard to beat that 12 month warranty with 950 rwhp. Add heads and Im sitting around $10K.

A factory LT4 with a cam kit for ~$8500

LT1 with drop ins and cam kit for ~$7000

I noticed on Thompson's website, they state that the 12 month warranty is with purchase of Melling high pressure oil pump. Did they give you any details on this pump?

[Choda]

Originally Posted by L78toLT1

I noticed on Thompson's website, they state that the 12 month warranty is with purchase of Melling high pressure oil pump. Did they give you any details on this pump?

I didn’t ask but yes that oil pump, timing set and cam is part of their warranty.

[KingLT1]

Have you looked at LME? You can get a LME 377 LT4 shortblock rated up to 1400whp for 8373.00 or a LT1 rated for 1100whp for 7596.00. I believe the 416 is 9538.00 but I really don't see the point of mainly increasing stroke for a FI application. If I was wanting to add cubes then it would have to be a darton sleeved 427 for the larger bore.

[L78toLT1]

Originally Posted by Choda

I didn’t ask but yes that oil pump, timing set and cam is part of their warranty.

it would be interesting to have more info on that pump. I'm sure you're aware of all of the failures on OEM pumps. I know that Melling supplies the OE variable pressure pump. There are no other off the shelf pumps available to my knowledge. Given that Thompson refers to this pump as a High Pressure pump, I'm guessing they may be modifying stockers to defeat the variable volume/pressure functionality, and in doing so possibly mitigating the outer gear cracking issues that have plagued a not-insignificant number of cars.

[floridanick]

I am part of the club also of broken stock exhaust valve on stg2 ported head. I should have upgraded but didnt think 600hp n/a was gonna kill a 1K hp rated engine..

Just ordered a new block, Mahle power pack pistons, callies crank, and will looking into rods

[Umbriel]

These destroyed engine from dropped valves is scaring me since I didn't touch my heads except springs, pushrods and a trunion kit.

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[Joshinator99]

Originally Posted by KingLT1

Have you looked at LME? You can get a LME 377 LT4 shortblock rated up to 1400whp for 8373.00 or a LT1 rated for 1100whp for 7596.00. I believe the 416 is 9538.00 but I really don't see the point of mainly increasing stroke for a FI application. If I was wanting to add cubes then it would have to be a darton sleeved 427 for the larger bore.

This. If/when my setup dies, LME is definitely how I'm going. Feel like they were able to figure out the LT shortcomings very early in the game.