Thread: think tank - vqman's N/A Big Cam SR23DE Build 92x86

I need to know how to build a 2.3 or 2.4L DE with BC3, C3 or S5 cams with this RR block I have... Do i want a lowport head for best airflow?

i want to keep square or slightly oversquare on my combustion chamber...

what are my best options for crank & pistons if I want a 2.4L DE. Do I need to sleeve my cylinders on an RR motor at 2.4L?? is that 30 over and a big friggin crank to obtain 2.4L??

the reason I want DE N/A power is because I like the lopey idel associated with heavily cam'd DE and I don't want the hassle of a Turbo and all the tuning and constant maintenance that seems to go with it.. a VE would be great.. but I'd lose my lopey idle.. UNLESS a custom cam was built with S3.5 - S4 like low lobe and S5 like (or greater) high lobe.

obviously i'd be raising compression with the larger crank, but when boring it out, doesn't that take away some of the would-be added compression?

of course my DE will need some tuning.. but it seems to take less time than turbo, right??

200-215 bhp to the wheels would be a goal.. ASP header, lightened flywheel, yada yada..


can someone point me to a thread that covers this? i've been reading and reading ... and can't get definitive answers..

Sarah Forst! where are you my darling!?!?





oh, did I mention I want this to be a reliable DD with lopey idle and 200+ hp to the front wheels??

This has nothing to do with the combustion chambers.

a square motor refers to pistons and crank being the same size. A SR20DE motor is a sqyare motor ay 86mm pistons x 86mm crank. So a 2.45L 92mm pistons x 92 mm crank is a square motor. A 2.3L 92mm piston x 86mm crank is an over square motor. A 2.2L motor 87mm piston x 92mm crank is an under square motor.

Builing big motor DE.

My 2.2L DE motor 90mm pistons with 86mm stock crank made 200 WHP. ( This is an over square motor )

My motor had

High port head ported
O2 Induction manifold with bored out 64mm TB------( I would use same thing with N1 TB ) *
JWT C3 cams
JWT Valve springs and retainers------( any good brand will do )
J&E 90mm 12 to 1 compression pistons
Sleeved block------( you can have Mazworx do this )
Crower rods------( I would now use Manley rods )
4 into 1 header with 2.5 inch collector
2.5 inch exhaust------( I would use 3 inch exhaust ) *
JWT ECU
370cc injectors
JWT pop Filter
Stock MAF bored out------( I would now use 3inch Maxima 95-99 MAF ) *
Pulleys

OK, so as said above I made 200 WHP with parts listed above.

If I were to build this motor again as above with changes in ( ) with * at end, it would have maybe made 210 WHP

Now if I were to do it again it would be a 2.3L motor. Why you ask, because sleeving a block and buying pistons cost the same, so build the biggest motor you can build with the same cost. The biggest headgasket righ now is the Mazworx 92mm headgasket which will work with a 92 mm piston.

So 2.3L = 92mm pistons and 86mm crank. This same motor with parts list above will make 230-235 WHP.

Lastly dont be smart and go out there and try and do this yourself because I am not to confident in your skills. Most of these things talked about above have been discussed on this forum.

So, know the facts you need to know for your build when you call Mazworx to order pistons. Do not try and call any piston maker other wise you will not get what you want.


Here are the facts

You want to build a 2.3L motor with a DE. Pistons will be 92mm and you want 12 to 1 compression. Use Manley rods. Use stock RR 4 counter weight crank because it is lighter than 8 counter weight crank.

I would use a DET or VE block so you can use the oil squirters to cool down pistons. I would also install a VE oil pump.

Anyway worry about the block build first then we will wrry about the head setup.

Freaking awesome Miko!!

And hell no I wouldn't be doing this myself!! LoL nor will I be trying to get a local shop to do it. SR's are not common here.

I suspect that I could assemble it.. After the machine work was done..


OK, now with the engine apart I'd spend money on a larger crank too... If they exist. 92mm pistons an largest crank out there would give me what size motor??

Seriously on the 92mm crank question you just asked, ( you dont read do you )¿ Everything is right there, all you have to do is read and comprehend.

my paypal is [email]moppel_det@hotmail.com[/email] , time fullfill your end of the batgin

lol should have posted in the all motor section.

I'm gunna reply to this even though I see Miko has replied. I haven't read any of the replies yet, so I don't know what has been covered or not. Obviously if something I say contradicts Andreas, you should ignore what I say and go with Miko's info.



Just FYI on the S5 cams. JWT said they are a bad cam design and were only created for a specific racing league with specific cam restrictions. They do not recommend them to anyone not in that racing league.

I would imagine so.


Yah I saw above where Miko corrected you on this. Square is about bore/stroke, not CC size or shape.

You could also just use a VE and run on the high cams all the time. Not sure if you'd have problems with oil pressure at idle not being high enough to engage the high cams though. Certainly there are race cams out there for the VE with "low" lobes only that are huge (no "high" lobes at all), and you could ditch the entire VVL system. It would be full race braw.


Nope. I'm sure Miko covered this, but I'll say it too. Cranks (or crank stroke) have nothing to do with compression.

Not exactly no. Really, bore and stroke have nothing to do with compression ratio. That's up to the piston shape/size and the CC shape/size.

No. Tuning takes time. That's all there is to it. It can take little time or lots of time. Doesn't really matter if you're N/A or boosted.

Heh... I was gonna ask what you charge!

Any thoughts on a custom monster VE cam?

With a high low lobe and REALLY high big lobe??