SR20DET notch top or top notch :)

mr lee · Post by **mr lee** » Thu Jan 27, 2011 11:18 am

Hi All

Am new here!

Have been doing a bit of reading through most of the threads.....

Have seen that some people are saying they have a SR20DET notch top or top notch (not sure which is the correct way)!

Google search only comes up with a red top and black top!

What are the most common in the SA registered S14's?

Main differences I can see between the red and black is that the black has better pistons and a port design to allow for better flow.

So joudging from what I have read the black top is the better of the two......am I correct?

Can anyone add anything else to the main differences.

Skylinefreak · Post by **Skylinefreak** » Thu Jan 27, 2011 11:40 am

SA S14s have the notch top SR20s and the cam cover is black as well.

Daniel · Post by **Daniel** » Thu Jan 27, 2011 11:40 am

The red top comes with a T25g and also does not have VVT

The black top comes with a T28 and has VVT

mr lee · Post by **mr lee** » Thu Jan 27, 2011 11:52 am

Thanks! So notch top it is

What is the most power (reliable and on pump fuel) that anyone has ever gotten out of the black top with bolt on mods?

Anyone here drift their S14? What mods have you done etc.?

Skylinefreak · Post by **Skylinefreak** » Thu Jan 27, 2011 4:26 pm

Go check youtube for 'Rezlo' to see what proper SR20s can do.

aep886 · Post by **aep886** » Thu Jan 27, 2011 5:51 pm

Daniel wrote:The red top comes with a T25g and also does not have VVT

The black top comes with a T28 and has VVT

it VTC or VCT not VVT~!

MarkS14 · Post by **MarkS14** » Fri Jan 28, 2011 9:54 am

aep886 wrote: it VTC or VCT not VVT~!

What is VTC?

I know:
VCT is Variable Cam Timing
VVT is Variable Valve Timing

Both which are true for the S14 SR20DET

djtreble · Post by **djtreble** » Fri Jan 28, 2011 10:20 am

mr lee wrote:Thanks! So notch top it is

What is the most power (reliable and on pump fuel) that anyone has ever gotten out of the black top with bolt on mods?

Anyone here drift their S14? What mods have you done etc.?

People run about 400BHP out of them on standard internals, anything above you really should consider forged internals.

I drift mine and full spec can be seen here:
www.kaihatsu.co.za

aep886 · Post by **aep886** » Fri Jan 28, 2011 11:52 am

MarkS14 wrote:
aep886 wrote: it VTC or VCT not VVT~!
What is VTC?

I know:
VCT is Variable Cam Timing
VVT is Variable Valve Timing

Both which are true for the S14 SR20DET

VCT dont really do much for S14~!!!

djtreble · Post by **djtreble** » Fri Jan 28, 2011 12:05 pm

It doesn't? Have you felt the mid range difference?

MarkS14 · Post by **MarkS14** » Fri Jan 28, 2011 12:18 pm

aep886 wrote:VCT dont really do much for S14~!!!

Maybe yours is broken

Im still trying to work out what VTC is

MarkS14 · Post by **MarkS14** » Fri Jan 28, 2011 12:21 pm

djtreble wrote:People run about 400BHP out of them on standard internals,

300kw out a stock internal SR20? for how many minutes?

djtreble · Post by **djtreble** » Fri Jan 28, 2011 1:17 pm

Cooling, maintenance and proper mapping is your friend

I'm not pulling it out of my arse either, there are poeple here in the UK running 400 bhp on stock internals. You make your own decision though.

MarkS14 · Post by **MarkS14** » Fri Jan 28, 2011 1:30 pm

djtreble wrote:Cooling, maintenance and proper mapping is your friend

I'm not pulling it out of my arse either, there are poeple here in the UK running 400 bhp on stock internals. You make your own decision though.

Im sure they are people making 400hp on a stock SR, but for how long?

Stock head gasket lets go at 230-240kw
Pistons usually crack at 260-270kw

Maybe the British know something the Ausi’s don’t… that’s what Ive read many times on the Ausi forums.

djtreble · Post by **djtreble** » Fri Jan 28, 2011 1:35 pm

Not sure hey, you'll find that if someone runs 400 they won't run it on a reliable daily basis.

I personally am not going to run more than 350bhp for my drift s14 so not really going to be able to test the length of time you can run it on stock internals.

But if I build an SR in the future for 400 I will be able to test the amount of time. Run it till it fails then upgrade the internals so that I can learn the limits from first hand experience.