13 Corvette
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3rd Gear
Joined: Aug 2020
Posts: 3
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13 Corvette
Hi! My name is Jorge I would like can find answers for what im happened
i do mechanic in Manteca California so I receive a the call for a estimate so when arrived to the address the first thing what I see is that 2013 Corvette Whit engine out so water to cilinder damague the blocke and the person's who's call me for reference of my friend they already have a new blocke but LSX
I did my estimate Whit out to think what's is for come to me
For me was easy said ok one more engine why not so I do my work like always I never think the original heads LS3 ENSAMBLED IN LSX I already spend alnost 3 weeks first not compression then crank not spark I take the heads and I do double check and I change the cam for the LS3 MI MI compression go high 150-180 the first time 90-95 well ..one of the people the I know is mechanic saifd LSX CAN SAHFT WORK just camshaft pullet make a hole to make it macht to the cam now I'd installer all back and same thing no compression no spark...IS THE LSX 6.0 ENGUNE BKOCK COMPARTIBLE WITH LS3 6.2 HEADS FOR CHECY CORVETTE
I did my estimate Whit out to think what's is for come to me
For me was easy said ok one more engine why not so I do my work like always I never think the original heads LS3 ENSAMBLED IN LSX I already spend alnost 3 weeks first not compression then crank not spark I take the heads and I do double check and I change the cam for the LS3 MI MI compression go high 150-180 the first time 90-95 well ..one of the people the I know is mechanic saifd LSX CAN SAHFT WORK just camshaft pullet make a hole to make it macht to the cam now I'd installer all back and same thing no compression no spark...IS THE LSX 6.0 ENGUNE BKOCK COMPARTIBLE WITH LS3 6.2 HEADS FOR CHECY CORVETTE
Drifting
Joined: Dec 2016
Posts: 1,373
Likes: 217
from what im understanding:
you are working on a car with an LSX block and LS3 heads which currently has no compression and no spark. Something about the cam was mismatched earlier as well.
people more knowledgeable than I will prob be able to help you but:
1. There were two different reluctor wheels for the camshaft sensors - make sure they match
2. The LS3 heads are for 6.2, LSX 6.0 may result in a shrouded head (head is for a bigger bore?)
3. There are two types of cams for LS engines - single bolt and three bolt... make sure they match, or get an adapter?
you are working on a car with an LSX block and LS3 heads which currently has no compression and no spark. Something about the cam was mismatched earlier as well.
people more knowledgeable than I will prob be able to help you but:
1. There were two different reluctor wheels for the camshaft sensors - make sure they match
2. The LS3 heads are for 6.2, LSX 6.0 may result in a shrouded head (head is for a bigger bore?)
3. There are two types of cams for LS engines - single bolt and three bolt... make sure they match, or get an adapter?
Racer
Joined: Sep 2018
Posts: 314
Likes: 81
From: Virginia
Yes, LS3 heads work fine with a 6.0 engine.
I've got that combo in my 2005 vette. Haven't dynoed it yet, but my tuner and my mechanic both guess its close to 550 crank HP.
While LS3 heads may flow a little better on a LS3 block due to shrouding, they work fine with a LS2 engine.
Here are some interesting articles on this combo:
https://www.hotrod.com/articles/ccrp...ylinder-heads/
https://www.corvetteforum.com/forums...post1566130206
The only thing about stock LS3 heads on a LS2 is the combustion chamber is larger dropping the compression close to 10:1 (I forget the exact number).
On my build I had the heads shaved .015 and used a .040 cometic gasket to keep the CR at 11:1.
You also need to use a LS3 intake with LS3 heads. While a LS2 intake might bolt up to LS3 heads, it would be a horrible mismatch and cause significant flow issues.
The stock LS2 throttle body works fine with the LS3 intake.
Dave
I've got that combo in my 2005 vette. Haven't dynoed it yet, but my tuner and my mechanic both guess its close to 550 crank HP.
While LS3 heads may flow a little better on a LS3 block due to shrouding, they work fine with a LS2 engine.
Here are some interesting articles on this combo:
https://www.hotrod.com/articles/ccrp...ylinder-heads/
https://www.corvetteforum.com/forums...post1566130206
The only thing about stock LS3 heads on a LS2 is the combustion chamber is larger dropping the compression close to 10:1 (I forget the exact number).
On my build I had the heads shaved .015 and used a .040 cometic gasket to keep the CR at 11:1.
You also need to use a LS3 intake with LS3 heads. While a LS2 intake might bolt up to LS3 heads, it would be a horrible mismatch and cause significant flow issues.
The stock LS2 throttle body works fine with the LS3 intake.
Dave
