Destroking sr20det

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

I currently have a 98 sr20det I'm building on a stand and am considering mildly destroking (1.8-1.9L?) My thought process is that should help increase my redline (I like very high revving motors-like my 600cc bikes), lower my compression slightly to aid with higher potential turbo output, and efectively lengthen my gears slightly. any input would be appreciated.

Post by **GroundZero** » Thu Sep 04, 2003 8:50 am

the sr20det alread has a square bore to stroke, that already equates to a high revving motor, that is unless your trying to rev to 13000 rpms like your crotch rocket. but be prepared to pay out alot of money to destroke your crank.

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

I'm thinking 10-11k rpm possibly. An oversquare bore would do this nicely. now I know there's a stroker kit (2.2L) avail, what about the other way. also, just trying to thro the idea out there to maybe find a problem that I haven't thought of yet. Maybe fuel mapping will be a problem. (?)

Post by **hurddawg** » Thu Sep 04, 2003 8:50 am

i dunno if this will work but the fwd sr has different displacements...there is a SR16 and SR18 and of course SR20. check to find out if the cranks and rods work on if they do import the SR18, which should be amazingly cheap because no one wants them. There output is a lot lower than the SR20...I think (maybe carb? SR18Di).

You'll need dual valve spirngs and a rocker arm stopper and you should be set...

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

Just to get my thoughts correct, these are the base model sentra engines, correct? If they are, why would anyone make forged pistons, rods, and cranks or these motors when there's the drop-in sr20 avail? Are these engines the same block?

Post by **hurddawg** » Thu Sep 04, 2003 8:50 am

noooooooo!!!

the sentra uses GA series 1.6L (GA16de) only the Sr20DE was offered in the US. Hence you would have to import the SR18 or SR16 and swap internals into the rwd SR20. These motors should be no less as stout as the SR20DE(T) internal components (SR16, SR18 motors that is). FYI the SR16VE redline is around 8000ish (maybe higher and depending on version) i think not sure though.

this is the only possible way for you to destroke the rwd sr20. No one makes destroke kits for it.

thinking of it now, if you want a revvy engine why not buy a CA18DET? its slightly oversquare and I think easier to raise the redline mostly because it has a lighter valvetrain and no rocker arms...

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

what exactly is the ca18 from? I'm just starting to hear about it, now. although I've been working with sr20's in one form or another for quite some time, i've never heard of the a18 until recently. maybe some backround, etc. Thanks.

Post by **kkekeisen** » Thu Sep 04, 2003 8:50 am

the ca18's came in a bunch of cars, but people know them as the engine in a 180sx before they put sr20's in them.

kyle

Website · Post by **s13sr20chris** » Thu Sep 04, 2003 8:50 am

sr16ve can really rev. stock sr16ve is supposedly able to go over 9000 rpms. will need to go with standalone obviously. bottom end will shake itself to death at 10k i would imagine.

Post by **hurddawg** » Thu Sep 04, 2003 8:50 am

kkekeisen wrote:the ca18's came in a bunch of cars, but people know them as the engine in a 180sx before they put sr20's in them.

kyle

silvia too! 88-90You can find a version of the CA in the S12 (aka 200sx prior to 88), the ca18et, ca18e which are SOHC verions of the motor.

Post by **NeedCAforS13** » Thu Sep 04, 2003 8:50 am

come check out the CA forums:D we've got all kinds of small displacement, high revving motors! do you specifically want an SR18 for some reason?

http://www.nissaninfiniticlub....d=126

Sean

Post by **dareo** » Thu Sep 04, 2003 8:50 am

Install a CA18DET, destroke it, then rev it to 12k. I would give you insane props. If 12krpms could be done, that would be sick.

Post by **tinted** » Thu Sep 04, 2003 8:50 am

There is no point to revving a turbo motor high.

Post by **Nismo_Freak** » Thu Sep 04, 2003 8:50 am

Several problems arise at 10k ...

1. Even aftermarket valve springs are rated at 10k 2. Internal balancing becomes a HUGE factor in keeping the rods in the block and the bearings in the right position. 3. Oil and Water Pump... both will be wayyyy out of their operational speeds4. Piston speeds will be outrageously high in the SR... which is why your looking to destroke it. However as you may or may not know, squarebore engines produce alot of cylinder wall friction. 5. Aftermarket internals are needed to even touch anything over 8500 safely in either engine 6. Your engine must flow that high, this includes cams, turbocharger, manifolds (both), head work. 7. Ignition system must be able to keep up with that many firing cycles. 8. Cooling system must be up to the task

Your talking about a huge performance build-up to achieve that sort of rev capacity.

Post by **Nismo_Freak** » Thu Sep 04, 2003 8:50 am

tinted wrote:There is no point to revving a turbo motor high.

1500bhp and 700 lb. ft. of torque in a carbon fibre / titanium open wheel car prove you wrong.

or...

1500bhp and 1000 lb. ft. of torque in an AWD beast prove you wrong

Post by **tinted** » Thu Sep 04, 2003 8:50 am

no ****, but for street driving on a normal persons budget?

Post by **tinted** » Thu Sep 04, 2003 8:50 am

but also, what about a short ratio transmission? +20k+

Post by **Nismo_Freak** » Thu Sep 04, 2003 8:50 am

tinted wrote:no ****, but for street driving on a normal persons budget?

You didn't mention reality hahah

:pface

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

ok, guys. let's say I own a shop and I'm being sponsored to do some outlandish stuff. also, I think I'm on the five-year plan, but before I get started, I'd like to have a complete and final plan of action.

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

By the way you are very correct about cylinder wall friction in an oversquare engine. That's actually where my thought process was currently going, but I didn't even think about the water pump and oil pump. thanks!

Post by **hurddawg** » Thu Sep 04, 2003 8:50 am

you could convert to an eletric water pump setup. its been done on the fwd sr20de's. Might be able to use the kit some people are making (block off plate for water pump), as I think the bolt pattern for the rwd and fwd SRs are the same. btw I believe its the offset of the pump is different, that is why the 2 pumps don't interchange.

dunno about the oil pump though.

Post by **RobDET** » Thu Sep 04, 2003 8:50 am

Not tryin' to be a **** or anything but seriously....

Ever thought about doing the honda thing? The B16 is good to about 10 grand from the factory (you'de need cams, ecu and springs to keep making power up there)

Plus with the honda you get daily driver ability on the small lobes and 10K RPM madness on the big lobes.

Post by **RobDET** » Thu Sep 04, 2003 8:50 am

BTW the B16 is the only "B" that is square or better so you don't need over square to revv (the ITR is under square and makes 8k+) . You just need good engeneering...

Post by **dareo** » Thu Sep 04, 2003 8:50 am

I'd love a Honda, a RWD Honda that is. No i dont have the change for an S2000. Hey Honda, WTF, make some RWD stuff! Civic Sport, RWD coupe, some decent Vtec motor in it, pitch it as a 'drifting car' and everybody would buy em.

Post by **RobDET** » Thu Sep 04, 2003 8:50 am

resurrect the CRX. Make it look a little more modern (not too mutch) and make it RWD People would buy it. But sadly there will never be a front engine RWD B series :-(

Post by **dareo** » Thu Sep 04, 2003 8:50 am

I'd be all over a RWD CRX, give it close to 200hp N/A, design it to be able to drift well. Sell for 20k

Post by **RobDET** » Thu Sep 04, 2003 8:50 am

shoot if it weigs 2,200 or less it only needs about 160 or 170. I'de sell my 240 tomorrow if htey did that

Post by **MasterMan** » Thu Sep 04, 2003 8:50 am

put a rotory engine in a 240.. like a 3 rotor or hell even a 4 rotor!! that would be crazy

mmm rotor goodness!

Post by **raw0330** » Thu Sep 04, 2003 8:50 am

I have considered honda, but I'm a nissan guy all the way, from my old (93) stillen supercharged maxima (vg30de) 'til now. also, gotta love the rwd. I actually considered a 95-6 h22 vtec prelude, built and turbo'd, but honda's are so pase these days. I refuse to become a ricer from a racer!!!

Post by **RobDET** » Thu Sep 04, 2003 8:50 am

hehe don't say that too loud or you'll attract a bad azz CRX... Doesn't take mutch to get them right with anything on the strip, track, or autocross...

Destroking sr20det

Destroking sr20det

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums