SR20VET head swap cons

[Silvi]

Looking for opinions from those who swapped their DET head with VET, is it realy noticable?

What are the actual differences between the det and the vet heads? is it really worth the the effort and the cost?

Thanks!

[hanzbrady]

Well,

The stock VE head flows more than a race ported DET head.

It can rev higher safely due to shaft mounted rocker arms that will never fly off.

You can run larger cam profiles for more top end power without sacrificing low end power due to the VVL.

The entire VE valvetrain is smaller than the DET counterparts and inherently lighter.

Since the solenoid can be switched electronically to enable the VVL you have complete control of the powerband.

IT IS RELIABLE. The VE head will make 1600hp all day pass after pass and not complain a bit, a DET head on the other hand will spit its rockers everywhere once you start to actually abuse it.

[Ramonesfreak2010]

Cons: Expensive as hell when done right. lol

[RalliartRsX]

Originally Posted by Ramonesfreak2010

Cons: Expensive as hell when done right. lol

Meh, that it relative and there are deals to be had if you spend the time to scour listings. Not too much more expensive than building a DET bottom to top in all honesty.

OP, look up the Sr20/22VET thread here on the forum

[Silvi]

Originally Posted by hanzbrady

Well,

The stock VE head flows more than a race ported DET head.

It can rev higher safely due to shaft mounted rocker arms that will never fly off.

You can run larger cam profiles for more top end power without sacrificing low end power due to the VVL.

The entire VE valvetrain is smaller than the DET counterparts and inherently lighter.

Since the solenoid can be switched electronically to enable the VVL you have complete control of the powerband.

IT IS RELIABLE. The VE head will make 1600hp all day pass after pass and not complain a bit, a DET head on the other hand will spit its rockers everywhere once you start to actually abuse it.

Wow! Thanks for the information
So I guess the cons will be the crazy price of this swap and the thing that the intake/exhaust manifold wont fit to VE head so I should replace all.

about the pistons/all lower engine part - will it suit with the head as is?

[Silvi]

Originally Posted by RalliartRsX

Meh, that it relative and there are deals to be had if you spend the time to scour listings. Not too much more expensive than building a DET bottom to top in all honesty.

OP, look up the Sr20/22VET thread here on the forum

Can you please share a link?

[hanzbrady]

Originally Posted by Silvi

Wow! Thanks for the information
So I guess the cons will be the crazy price of this swap and the thing that the intake/exhaust manifold wont fit to VE head so I should replace all.

about the pistons/all lower engine part - will it suit with the head as is?

DET/VE exhaust bolt pattern is nearly identical and most quality manifolds are made to fit both.

The intake will need to be replaced with an aftermarket VE one so that it actually fits the chassis and the bolt patterns are completely different due to the larger intake ports.

As per the bottom end, I always recommend our customers go with aftermarket VE pistons because thay have the valve pockets needed to clear the high lift cams that come with the VE head, SOME aftermarket DET pistons may clear but I never recommend it due to the risk involved.

Dimensionally the pistons are identical aside from the valve pockets as stated, the rods between DET and VE are the same, as is the rest of the rotating assembly. Meaning a DET crank will work with the DET head.

[Silvi]

Thanks!
I guess the recommendation is to go with the standard bore size(86mm) ,right?

[RalliartRsX]

Originally Posted by hanzbrady

As per the bottom end, I always recommend our customers go with aftermarket VE pistons because thay have the valve pockets needed to clear the high lift cams that come with the VE head, SOME aftermarket DET pistons may clear but I never recommend it due to the risk involved.
.

To add to this; DE piston dish is slightly larger than the Combustion Chamber of the VE head. What this means, is if using DE pistons, that equates to a bump of compression by 0.6-0.7. So, if using DE bottom end with 8.5:1 pistons, with using a VE head your static compression will be 9.1-9.3:1. Not a big issue if one is aware, but something to be aware of (and absolutely agreed on the valve relief comment)

Anything 9:1 on DE pistons "should" (emphasis on the should) a safe bet with P11 cams. Anything higher in compression, I would not recommend.

OP, please do a search on the forum for the VE thread. Not interested in spoon feeding at this time, sorry

[hanzbrady]

Originally Posted by Silvi

Thanks!
I guess the recommendation is to go with the standard bore size(86mm) ,right?

That's entirely up to your opinion, big bore = big power potentially. 86mm would save you the cost of sleeving, but would limit you power wise.