sr20de mods

[Enigmatik33]

hi guys, hoping some of you might be able to help me. I'm from Scotland and recently acquired a 94 silva q s14. It's a Japanese import and is unusal here as all s14's are usually of the turbo variety unlike mine. So far no one here has been able to help with mods and thought maybe you guys might be able to help. I'm looking for a tubular manifold (header?) for the car and possible some other tuning parts to squeeze some more power from it. any help or advice would be great cheers

[nismostate]

save the money and get an sr20det. cheaper and much bigger gain.

[Nismo_Freak]

Hi, have you hit up http://www.sxoc.com yet? Surely some of those guys can help you out.

As for mods, you have alot of options, even some from stateside.

- Fujisubo makes nice headers- Zorsts are the same as the turbo jobs (if noise isn't a concern then go full 3" - trust me)- Crank pulleys are made by UR, the turbo unit should work on the N/a motor- Turbo oil pumps are upgrades- Camshafts are plentiful, I suggest JWT S4's if you are wanting a bolt-in camshaft- The engine you have should be running around 9.5:1, bumping up to about 11:1 will require 100% Optimax usage but will run strong.

Currently you can bump the ignition timing to about 17 degs. BTDC. This will give you a good gain around the 5500 - 6500 mark and make throttle response seem better. It will require you to run Optimax as the SR motors are very very sensitive about detonation (overly so IMO).

If you wanna go all out, I'd pick up some Tomei procams in 270+ duration, or some JWT C2 camshafts, and center those around a complete 42mm long horn ITB setup and oversized valves.

[Nismo_Freak]

save the money and get an sr20det. cheaper and much bigger gain.

You could always swap out engines if you wanna go turbo. Might even save you on your insurance if you don't report it, but I don't know how MOT goes about with swaps.

[Enigmatik33]

nismo freak tryied sxoc but no one could give me a reply expect sell it and buy a sr20det, and to be honest when the next post is someone's sr20det blowing up the following someone having bought one and then being told he'll have to replace the engine, got to be honest not filling me with confidence.

I only run the car on optimax as it as. Biggest problem I have immediately is no one being able to tell me what clutch it has, contacted apex in the uk and few others and no response. Noticed primera gt and sri use variations on this engine so going to contact nissan dealer see if they can help then order clutch through work.

Also trying to find out what specific differences are. I know mine uses 4 stud instead of 5, the turbo's run 280mm discs up front, mate of a mate has 4 pot calipers i'm going to buy if i can source carriers and then run s13 4 stud front discs. Need to find out if gearbox is physically different, i.e smaller input shaft and/or ratios etc. Diff i figure will be different, i.e won't be LSD. Other question i have is whether DE head will match up to DET Bottom end, whether 24 or 20. Reason being can't be arsed with turbo lag, but I'm a big fan or super charged engines. Bro has a g40 polo. so curious whether as something a little different DET bottom end could be mated up to DE head with good port and polish mild cams headers and then supercharged for nice steady even torque curve. Figure this would make for a completely different animal to the turbo's but much nicer for road and track work. Aim would be nice 250/260 bhp

Any thoughts other than sell and buy a DET would be appreciated. Got to admit though kinda falling for the way this one drives.

[Nismo_Freak]

nismo freak tryied sxoc but no one could give me a reply expect sell it and buy a sr20det, and to be honest when the next post is someone's sr20det blowing up the following someone having bought one and then being told he'll have to replace the engine, got to be honest not filling me with confidence.

I only run the car on optimax as it as. Biggest problem I have immediately is no one being able to tell me what clutch it has, contacted apex in the uk and few others and no response. Noticed primera gt and sri use variations on this engine so going to contact nissan dealer see if they can help then order clutch through work.

Also trying to find out what specific differences are. I know mine uses 4 stud instead of 5, the turbo's run 280mm discs up front, mate of a mate has 4 pot calipers i'm going to buy if i can source carriers and then run s13 4 stud front discs. Need to find out if gearbox is physically different, i.e smaller input shaft and/or ratios etc. Diff i figure will be different, i.e won't be LSD. Other question i have is whether DE head will match up to DET Bottom end, whether 24 or 20. Reason being can't be arsed with turbo lag, but I'm a big fan or super charged engines. Bro has a g40 polo. so curious whether as something a little different DET bottom end could be mated up to DE head with good port and polish mild cams headers and then supercharged for nice steady even torque curve. Figure this would make for a completely different animal to the turbo's but much nicer for road and track work. Aim would be nice 250/260 bhp

Any thoughts other than sell and buy a DET would be appreciated. Got to admit though kinda falling for the way this one drives.

The DET and DE gearboxes are the same.

The DET bottom end and DE head both bolt onto each other.

The DE bottom end will hold up to 250 - 260bhp all day just fine.

The diff is a non-LSD 4.083 ratiod unit, quicker ratio than the turbos.

The clutch is the same 225mm unit found in the turbos. FWD clutches do not fit.

The 4Pot turbo brakes are a direct bolt on if you modify the banjo fitting. Otherwise you will need lines with an IF (inverted flare)

Apex aka Bren should know what he's on about. He's a busy guy though. I've chatted with him on the phone before, real nice.

You don't need to port the head, and go with some very mild camshafts if you are supercharging the motor. Something around a Tomei 256 would be very nice and very torquey. As you limeys say, it'd be the dog's bollox mate

If you want some OEM cam upgrades, look to the early model high port FWD SR's, the intake camshafts were 248 duration with a wee bit more lift than standard S14 camshafts. It will net you a 6whp gain over standard!

[Enigmatik33]

The DET and DE gearboxes are the same.

The DET bottom end and DE head both bolt onto each other.

The DE bottom end will hold up to 250 - 260bhp all day just fine.

The diff is a non-LSD 4.083 ratiod unit, quicker ratio than the turbos.

The clutch is the same 225mm unit found in the turbos. FWD clutches do not fit.

The 4Pot turbo brakes are a direct bolt on if you modify the banjo fitting. Otherwise you will need lines with an IF (inverted flare)

Apex aka Bren should know what he's on about. He's a busy guy though. I've chatted with him on the phone before, real nice.

You don't need to port the head, and go with some very mild camshafts if you are supercharging the motor. Something around a Tomei 256 would be very nice and very torquey. As you limeys say, it'd be the dog's bollox mate

If you want some OEM cam upgrades, look to the early model high port FWD SR's, the intake camshafts were 248 duration with a wee bit more lift than standard S14 camshafts. It will net you a 6whp gain over standard!

Cheers mate, and for future reference not a limey, I'm a Scotsman. We tend to get bit irate if lumped in with the "others"

So I can do the clutch then work towards supercharging it? Might be time to look at mounting and space issues, don't supose you know if anyone does off the shelf mounting brackets for a charger on this motor? Would probably be using a merc 230 charger, which i think is an eaton?

You say the DE bottom end can handle 250 or 260 bhp? Does this mean i could stick with this bottom end or will it need compression lowered? i.e sspacer or low comp pistons? As if that's the case I'll just fit a DET bottom end as it's built for F/I

Just going to take those calipers then, need to source carriers and modding the hoses shouldn't be a problem as swapping to braided anyway.

Yeah i emailled bren, and haven't got a reply yet. I'll give it till end of week in case he is busy.

I'm kinda impressed there is little difference. so basically it's down to rear diff and front brakes. Might make life a lot easier at later date.

I really appreciate all this info, bit hard to get it in the UK as everyone is geared towards Turbo versions.

[Valley]

i heard the DE block does not have the oil squirters the DET block has, can anyone verify this?

[180fan]

DE's do not have the oil squirters the DET block has. However, it can be machined in as well as the lines for the turbo.

[Nismo_Freak]

Cheers mate, and for future reference not a limey, I'm a Scotsman. We tend to get bit irate if lumped in with the "others"

I know, I was just pullin your chain.

Stick to the DE bottom end, you'll produce better torque throughout and it will run as standard for a long time.

Drop in an aftermarket clutch from the DET and you'll be good there.

No superchargers that I know of, especially using a roots style blower. Thats all custom.

Good luck.

[Enigmatik33]

so no need to lower compression on the DE? life is good then

any idea where I could get hold of a service manual for a silvia q (in english obviously) or a 200sx non turbo manual?

again thanks for all the help

[Nismo_Freak]

so no need to lower compression on the DE? life is good then

any idea where I could get hold of a service manual for a silvia q (in english obviously) or a 200sx non turbo manual?

again thanks for all the help

That won't happen, as the non-turbos didn't make it out of Japan, and the only other non-turbo varient is the one we have here in the US and it's a different motor.

http://www.camel-towing.com has the 200SX manual for the turbo, most of everything is the same.