Hi all,

Just wanted to ask something on the forums as I haven't seen anything yet.

Its obvious that if you add a supercharger to a 2zz, its great, gives it more powah and overall a good experience.
If you add a stroker kit to a 2zz, changing displacement to a 2L, again, more powah.

Has anyone tried them both together? Thinking about doing it myself but im not sure yet. Im still looking at other supercharger options. Some that offer a smaller pulley than 65mm (thats the smallest MWR offer I believe)

Thanks peeps

I think Ronin was running the stroker kit and a TVS supercharger in his Exige. It still wasn't enoigh. He ended up twin charging it with an E153 transmission.

IMO a 2zz does not need more torque if you have enough boost and add lightness. The transmission is just going to die that much faster.

 

IMO a 2zz does not need more torque if you have enough boost and add lightness. The transmission is just going to die that much faster.

This is yet another reason why I went with a 2AR+E350. Now that I have a block with 2.5L and a transmission that's much more robust, I have a much larger upgrade path. The 2AR feels like hitting lift in the 2zz but at 2000 rpm and it only gets better from there. That gearbox has handled Marc's 400whp 2gr build so it'll be plenty strong for any reasonable build.

 

What's the advantage to a stroker kit over just doing some lower compression forged pistons? The only advantage I can guess at is that you would be running with less boost for the same power. Either way the engine is getting rebuilt and around 250-300 ftlbs of torque you are at the limits of what the transmission can handle. But with the forged pistons you can reuse your rods and crank.

 

I just wanted to get some insight for those that have had a stroker kit installed ans how they have compared with different methods of forced induction. Dont really want to spend thousands and wing it for a crap result.

 

I believe there is one person that I know of that has done both the supercharger and stroker motor. His name is Curt.

https://www.spyderchat.com/members/curt.2369/

 

Im planning on getting someone to make a forged 6 speed for me. Gonna cost a lot of £££ but it'l be interesting.

 

The C6X transaxles (along with almost every modern gearbox) already uses forgings for the gears etc. so that's not an option to increase strength. You could go to straight cut gears but it's going to be thousands.

I thought you were building some 9.0:1 engine with forged pistons and going turbo?

Or is this all just a dream exercise?

 

Just from what I have read and not my personal experience:

< 250whp you could get by with a stock 2ZZ + C60
< 300whp you would be fine with a mild engine build (lower comp pistons). With the mild build the engine may be capable of more but you are running into the limits of the trans and there aren't any reasonable options for a built trans / alternative trans
300whp+ your looking at a turbo k swap or an Audi 1.8t swap (which is a relatively new swap - unsure if the engine needs to be opened or not)

Since you are looking at supercharging it may also be worth running an NA 2GR but that requires modification of the subframe / firewall I think

 

2GR but that requires modification of the subframe / firewall I think

Interesting things are being done with some newly designed motor mounts in the SW20. Pitching the 2GR to improve axle angle and clearing both firewalls. Maybe its something to be considered for the ZZW30 too.

 

At that price range do a k swap.

 

My thoughts, as I'm also considering a stroker + supercharger, though probably for a 2AR instead of the 2zz:

The first obvious question is, track or street? For track, any way you can get hp is good, though torque is still very helpful. (To quote Jay Leno: "Hp sells cars, but torque wins races." )

Anyway, for a street car only, which is what I want, low revs torque is the brass ring.
Looking at all the alternatives (except the GR, which is a nightmare swap with a MR2 Spyder)
The only two solid option are the 2AR, or a turbocharged / supercharged K24a2.
- And I'm pretty sure the 2AR still wins the low-rev torque wars.

I listed the 2ZZ numbers as well, below.

A stroker kit theoretically adds about 8% torque. It does slightly limit max revs, but I don't care at all. This is a street car.

A supercharger is better than a turbo for this application, as it adds more low end torque.
A low boost supercharger without an intercooler is probably my choice, as it saves about 100 lbs, and puts less stress on the internals. PLUS it gives even better throttle response.
Based on gains with the various supercharged Lotus 2zz cars, I see these improvements, over the best version stock 2zz:

The non-intercooled supercharger (Lotus Elise SC)
1.15 x the HP / 1.177 x the Torque

supercharger with intercooler (for more boost) (Lotus Exige S)
1.19 x the hp / 1.31 x the Torque (but adds 100 lbs)

supercharger with intercooler + upgraded fuel injectors & ECU map. (Lotus Exige 240R)
1.27 x the hp / 1.31 x the Torque
--------------------------

A 2AR FXe with Frankenstein intake, header, no cat, springs and cam reportedly gives:
241 whp 195 wheel torque. - And that torque reportedly peaks very early, then stays high for most of the rev range.

So going full Frankenstein, + a stroker kit, + basic supercharger (saving 100 lbs) should give a minimum of:
299 hp / 247 ft/lbs - AT THE WHEEL.

In a 2300 lb car. I think that will do nicely. Heck, it might even be too much.
-------------------------------------------------

Of course, I may be missing something as I'm very new to all of this, so I look forward to everyone telling me I got it all wrong!

 

I forgot to directly address the OP:

Stock 2zz, best version: 189 hp / 130 ft-lbs @ 6800 rpm

2zz, best version, stroked but no SC : ??? hp / 140 ft-lbs

2ZZ, Supercharged, but no intercooler: 218 hp / 153 ft-lbs (Lotus Elise SC)

2ZZ, Supercharged, no intercooler, stroked:: 235 hp / 165 ft-lbs

#4 'aint bad at all for a street car. Still, that 2AR, oh baby.

Also, that's a somewhat small gain considering the cost of both kits together, even if you're able to do the work yourself. (I'm not.) The supercharger alone gives more torque gain than the stroker kit alone, and also gives that torque at lower revs. Therefore it's a much better value, (for a street car) at nearly the same cost.

 

I forgot to directly address the OP:

Stock 2zz, best version: 189 hp / 130 ft-lbs @ 6800 rpm

2zz, best version, stroked but no SC : ??? hp / 140 ft-lbs

2ZZ, Supercharged, but no intercooler: 218 hp / 153 ft-lbs (Lotus Elise SC)

2ZZ, Supercharged, no intercooler, stroked:: 235 hp / 165 ft-lbs

#4 'aint bad at all for a street car. Still, that 2AR, oh baby.

Also, that's a somewhat small gain considering the cost of both kits together, even if you're able to do the work yourself. (I'm not.) The supercharger alone gives more torque gain than the stroker kit alone, and also gives that torque at lower revs. Therefore it's a much better value, (for a street car) at nearly the same cost.

I'm strictly N/A stroker but I have some mods I carried over from my 2zz. 221whp with 165tq. It's a street car.

 

Since the track seems to be a big focal point for you, I still say a Honda K is the ticket. They’re proven motors under beating conditions, parts support is through the roof (aftermarket and OEM), and a plethora of tuners through various means. With all that said, your car- your rules.