Hi guys,

I'm in the process of building a new engine for my Vauxhall VX220 here in the UK. I'm pretty sure you haven't got any of them in the states but it's based on/similar to the Lotus Elise.

I believe I'm the only person in the UK who is currently building an LSJ engine to go in their car. Consequently over in the UK we don't have any experience with them, certainly not in tuning them.

What do you guys think of the following specification?


Brand new 2.0 LSJ Block
Diamond 9.5:1 pistons
Ported LSJ head
Standard LSJ valves
Supertech 92lb valve springs
Uprated injectors
Comp Cams blower cams
Harrup TVS Supercharger with 80mm pulley
Dual Pass Mod
External crank trigger wheel (to work with the VX220 ECU)
Pro Alloy Chargecooler
LSJ throttle body
Lightweight flywheel
Uprated Clutch
Balancer shafts removed
MRZ crank and alternator pulleys
3" Exhaust, 100 cell race cat and 4-1 Manifold

Is there anything there you would change or do differently? Do the rod bolts need ugrading to ARP ones? I'll be running on 98 octane fuel all the time.

A friend has just produced ~370bhp at the crank with the Harrup on the 2.2 litre Z22se engine.

A few pics of the car it's going in are here:

http://www.muncher.org.uk/newvxpics

 

Only thing I have to add is that car will be insane after the build.

 

Can i do your car? ^^ I agree with that guy.

Actually I don't. Don't go with the tvs go with a nice turbo set up.

 

The rod bolts should be fine. in stock for the rods are known to handle 600hp which you will not reach with the Harrop. For most the cams have been very hard to tune so you may want think twice about them.

You should get close to the 370hp with that setup. However, what people such as myself have been doing over here is getting rid of the SC all together and converting to turbo. If you have any more questions feel free to ask.

 

I would actualy say get the LS4 TB and do a custom CAI. The TVS will handel the LS4 TB stock and you will see a nice benifit from the LS4 over the LSJ

 

that looks sweet hope the build goes good!

 

saved.....car looks great

 

did it come with an lsj or are you swapping it? looks like a miata.

 

reminds me of a sky but it still looks good. i would turbo the lsj though. weve already know they like turbos over sc's

 

Hi guys, a turbo is not an option

The characteristics of the car mean that it isn't suited to a turbo power delivery, it's much better to have a linear and smooth torque curve for track driving. Being mid engines heat would be a big problem with a turbo. I also have the harrup already

I'm aware the blower cams are quite harsh but I already have a set here. Whilst fuelling at idle was rich on a friends car they produced 30bhp more than the standard 2.2 cams in his car. Hopefully the fuelling can be sorted.

The car only weighs ~820kg (not sure what that is in lbs off the top of my head) so it should be pretty quick!

 

well then good luck with everything and keep us updated

 

Keep the TVS, sounds solid. That car was made to handle, and the TVS will give you the low end grunt you need coming ut of corners. Like these guys say, go with the LS4 TB if you can get it.

Contact Qwikredline on here about a single pass setup, superior to the dual pass, and in the end safer for the motor because it further increases the efficiency of the intercooler system.

 

thats gonna be a BEAST!!! cant wait to see this thing

 

It comes with the gm 2.2 z22se as standard producing 150bhp. I've currently got the m62 supercharger on producing approx 220bhp. It feels very quick at the moment with that. Later models of the vx220 also came with the 2.0 turbo (not lsj) but it is widely thought that SC or NA power suits the car better. Afterall lotus chose the SC route for the top spec Exiges.

 

^for very good reason, people just don't want to listen...

 

the harrop is better with the ls4 tb, even if oyu dont have a 3" intake, you can use a coupler between them to make it fit without issues. yet if you do have the ls4 tb, should use a 3" intake anyway..

 

actually the LS4 TB is 3.5" so the perfect intake would also be 3.5, but then you get velocity issues and the maf gets confused. 3" is the best without getting custom up in your shizit lol

 

and yet my buddy still insists they are Turbo. Even though the freakin website says Supercraged! lol He can be stubborn. I'll have to show him this.

Anyway, nice car! Good luck with the build!

 

Thanks guys this is all useful info! I was led to believe the dual pass mod was more efficient?

The ls4 tb sounds like a plan, what size is it? I have a 2.4 throttle body but I thought they were the same size?

If I can get to ~380bhp I should have something with a better power to weight ratio than an Enzo, which can arguably handle and stop better as well.

 

no, the 2.4 TB<LSJ TB<LS4 Tb

that would be awesome if you reach that goal.

PM Area47 about tuning.

 

Comp does not make cams for the LSJ.

For crank pulley, get the ATI.

 

Tell him the only Lotus on sale with a turbo engine is the Europa which is basically a vx220 turbo anyway. Every Elise and exige is either NA or SC.

 

Frazier, what is ATI? do you have a link?

 

No but they should fit, the heads are the same as on the 2.2 but sandcast instead of lost foam. The exhaust cam is shorter than the lsj but for my purposes that is no problem.

 

So you are just not going to run the cam sensor, or does yours not run one. Also, if your going to run the shorter exhaust cam, be sure to plug the head.