Stroker Kit?

[collegeboy]

Hey there guys. I am VERY new to the NSX world. I own a 300zx twin turbo and have owned it for about 4 years now and have pored 10s of thousands of dollars into it (it's an addiction i know haha). I'm not selling it EVER, but am also very interested in nsxs and always have been. By the way, I am a noob here and this is my first post, so be gentle Anyways, I am finalising the deal right now on buying a friends black NSX from him and I had a question about the SOS stroker kit that I see on sale on their site. I was just curious if any one here has had any experience with this kit of knows what kind of gains can be had by stoking your engine to a 3.8 liter. Thanks for the help guys and I look forward to becoming an active member of this site.

Thanks,
Mike

Stroker Kit

 

[ediddynsx]

You will be happy with the 3.8L stroker motor however it is not cheap to get everything to get full potential out of it........this stroker kit is designed by Jon Martin of SouthBay Acura. The gain should be about 400hp and around 350rwhp. If you have any questions you can call Jon M. at 310-539-3636.

 

[collegeboy]

You will be happy with the 3.8L stroker motor however it is not cheap to get everything to get full potential out of it........this stroker kit is designed by Jon Martin of SouthBay Acura. The gain should be about 400hp and around 350rwhp. If you have any questions you can call Jon M. at 310-539-3636.

wow that would be very nice. with the nsx ( unlike the 300zx) i want to get the full engine potential out of it without the aid of forced induction. also no nitrous. i understand that going this route isn't easy or cheap, but it'd be a great project i think. I i got anywhere near those numbers you just showed me out of it with additional bolt ons i woul dbe very pleased in a car so light and exotic. Thanks for your help.

Mike

 

[ediddynsx]

No problem buddy you will be happy with th 3.8L stroker motor, just make sure you have the right tuner and installer for the motor. If you are not sure about people in your area then I would suggest you ship your car to Jon and have him build it for you. Call him first and then you will know good he is. Remember you will need to buy things like AEM EMS, pistons, crankshaft, resleeving the block, porting the head, match ported and extrude hone intake, throttle body, 3.2L valves and springs, rebush the stock rods, a good clutch like centerforce, chromoly ultra featherweight flywheel, OS giken LSD will make a big difference, maybe larger injectors?, cams (customs one made by jon), Gruppe M intake, Cantrell AIS, and I think thats it.....but call Jon to double check....he will be able to spell everything out for you.

 

[collegeboy]

No problem buddy you will be happy with th 3.8L stroker motor, just make sure you have the right tuner and installer for the motor. If you are not sure about people in your area then I would suggest you ship your car to Jon and have him build it for you. Call him first and then you will know good he is. Remember you will need to buy things like AEM EMS, pistons, crankshaft, resleeving the block, porting the head, match ported and extrude hone intake, throttle body, 3.2L valves and springs, rebush the stock rods, a good clutch like centerforce, chromoly ultra featherweight flywheel, OS giken LSD will make a big difference, maybe larger injectors?, cams (customs one made by jon), Gruppe M intake, Cantrell AIS, and I think thats it.....but call Jon to double check....he will be able to spell everything out for you.

what do you think about SOS's engine building services. they will do the whole longblock 3.8 liter for about $15k? If their work is good, I will just go with them. By the way, this is something I will not start UNTIL i finish my Z's engine here soon. But I like to look for options in advance.

 

[ANYTIME]

Someone is posting under your username! :biggrin:

wow that would be very nice. with the nsx ( unlike the 300zx) i want to get the full engine potential out of it without the aid of forced induction. also no nitrous. i understand that going this route isn't easy or cheap, but it'd be a great project i think. I i got anywhere near those numbers you just showed me out of it with additional bolt ons i woul dbe very pleased in a car so light and exotic. Thanks for your help.

Mike

I am a noob to NSXs, but would it be possible to have this supercharger along with a built 3.8L stroked low compression engine? Or would the thinner cylinder walls and head gaskets cause issues with high boost? If it would be ok, while being a bit pricey, these mods along with all proper ones could make for one disgustingly fast NSX with still good lowend power.

 

[TTony]

Mike,

You don't want to have 2 cars in the shop for a couple years do you? :wink:

The best advice if you get an NSX is to drive it for 6 months before you change ANYTHING. I did this and it changed my perspective entirely (coming from a 500rwhp 300ZXTT also).

There are maybe a handful of NSX stroker kits out there and no one that has one posts on this board. Also, the cost for the engine alone maybe $15k but then you are going to want to support that with a 6spd. ($7k), new clutch and lw flywheel ($2k), engine management ($2k), exhaust ($1k), tuning ($?), etc.

You will be in the $25k+ range before you know it. :frown:

 

[Ponyboy]

I'm not sure you'll need all of the above w/ the stroker although, ideally, you'd want all of it. For instance, the 6 speed would be unnecessary (my opinion). Science of Speed has indicated that the 3.8l engine will be able to run off of the stock ECU - though an AEM would yield better results.

<== looking forward to some dyno results.

 

[TTony]

I'm not sure you'll need all of the above w/ the stroker although, ideally, you'd want all of it. For instance, the 6 speed would be unnecessary (my opinion). Science of Speed has indicated that the 3.8l engine will be able to run off of the stock ECU - though an AEM would yield better results.

<== looking forward to some dyno results.

Going the NA route without I/H/E/gears is like going the FI route and only getting a SC with nothing else.

 

[Ponyboy]

Going the NA route without I/H/E/gears is like going the FI route and only getting a SC with nothing else.

...of which, many an NSX owner has done for various reasons.

 

[ediddynsx]

The things I was suggesting is to get the max potential out of the kit. You do not need the os giken or the aem ems. But if you are going to spend the time and money to do this kit wouldn't you want to get the full potential out of it? You do not have to buy everything at once. One of my buddies is buying the parts piece by piece until he has everything. It will cost you a lot of money to do this but the result is awesome and you can ask the SOS guys since they have the kit in one of their cars.

The whole point of this kit designed by Jon Martin was to be reliable and pass emissions. Now as far as emissions go yes it will pass smog only if you tune it right. With the motor at max power then you probably won't pass smog so basically you would retune the car down to pass smog. And you don't need the 6 speed, I asked Jon about that too.

By the way I talked about doing a supercharger with the 3.8L but that is way overkill plus the supercharger will be choking out. You would need a supercharger made for that motor. Right now they are made for 3.0 and 3.2L. And you will be spending over 25k easily with that combo. With the 3.8L alone I think you will be close to 25k when everything is said and done with all the parts. I still plan to do it, there is one guy in so cal that has that motor and I heard he spent about 60k but his car has everything (motor, suspension, braking, etc). Call Jon M. already and stop wasting time posting here.

 

[ScienceofSpeed]

We recommend customers install headers as well as the exhaust with the engine. Besides injectors, nothing else is required with the engine.

Just as it is with a supercharger, additional components will only help to maximize performance and durability but are not required and can be added along the way.

We've posted "out the door" pricing here:
http://www.scienceofspeed.com/produ.../custom_engine_program/custom_engine_program/

cheers,
-- Chris

 

[collegeboy]

Mike,

You don't want to have 2 cars in the shop for a couple years do you? :wink:

The best advice if you get an NSX is to drive it for 6 months before you change ANYTHING. I did this and it changed my perspective entirely (coming from a 500rwhp 300ZXTT also).

There are maybe a handful of NSX stroker kits out there and no one that has one posts on this board. Also, the cost for the engine alone maybe $15k but then you are going to want to support that with a 6spd. ($7k), new clutch and lw flywheel ($2k), engine management ($2k), exhaust ($1k), tuning ($?), etc.

You will be in the $25k+ range before you know it. :frown:

Oh well yea, I would keep it stock for a while. Really though, I know of the cost of cars man...I spent damn $20k on just a metal widebody on my Z and escort fascia and sideskirts and rear bumper and paint haha. Then about 5k on wheels and tires. Atleat another 25k on brakes, interior, stereo, and suspension, and have set aside an additonal $25k for the rest of my engine build. Oh yea, and also about 2k for all the subframe driveshaft and rear end work i did. I don't post about it on tt.net for obvious reasons. I know..sickening right? haha Thanks for the advice though. with the nsx it'll be a long process just like the Z but i don't mind. I really will try to keep it stock as long as i can stand it through college and stuff, but the Z didn't last long lol. Also, I'm obviously not sure AT ALL what I want to do to the car. Hell..I havn't even bought it yet, but I do like to probe ideas WAY in advance. the things I am doing to my Z now, I asked questions about 2-3 years and I will be exactly like that with the NSX. These are my two favorite cars. It's a disgusting and expensive adiction haha Once again, nice to see another tt.net member on here.

 

[collegeboy]

The things I was suggesting is to get the max potential out of the kit. You do not need the os giken or the aem ems. But if you are going to spend the time and money to do this kit wouldn't you want to get the full potential out of it? You do not have to buy everything at once. One of my buddies is buying the parts piece by piece until he has everything. It will cost you a lot of money to do this but the result is awesome and you can ask the SOS guys since they have the kit in one of their cars.

The whole point of this kit designed by Jon Martin was to be reliable and pass emissions. Now as far as emissions go yes it will pass smog only if you tune it right. With the motor at max power then you probably won't pass smog so basically you would retune the car down to pass smog. And you don't need the 6 speed, I asked Jon about that too.

By the way I talked about doing a supercharger with the 3.8L but that is way overkill plus the supercharger will be choking out. You would need a supercharger made for that motor. Right now they are made for 3.0 and 3.2L. And you will be spending over 25k easily with that combo. With the 3.8L alone I think you will be close to 25k when everything is said and done with all the parts. I still plan to do it, there is one guy in so cal that has that motor and I heard he spent about 60k but his car has everything (motor, suspension, braking, etc). Call Jon M. already and stop wasting time posting here.

Thanks i will try to contact him. like i said, just throwing out ideas to hear responses..thats what i do to figure out what i want. sorry if i seemed annoying. Thanks for the help though everyone.

 

[clarknm]

The gain should be about 400hp and around 350rwhp.

We recommend customers install headers as well as the exhaust with the engine. Besides injectors, nothing else is required with the engine.

So, can I take your lack of disagreement to be acknowledgement of the above posted numbers?

 

[ediddynsx]

Thanks i will try to contact him. like i said, just throwing out ideas to hear responses..thats what i do to figure out what i want. sorry if i seemed annoying. Thanks for the help though everyone.

Don't take my post as being annoyed...I am just trying to help you out. :biggrin: If you want something cheaper and fast get the supercharger. You can even look for used ones. That you can just bolt on and you are good to go. The handling of a FI car is different from N/A so it will be up to you how you want your car to be set up. You can't go wrong either way with a comptech supercharger or the N/A stroker kit. Both will be reliable until you decide to push the limits on them. Good luck my friend and let us know how things turn out. I plan to do the stroker kit but that won't be for a while since I already plunked 30k on the normal mods. (rims, suspension, headers, intake, exhuast, brakes, engine dress up, interior stuff etc etc.) So I am taking a break until I can recover :smile:

Man the nsx is a money pit :biggrin: but I love it.

 

[collegeboy]

Man the nsx is a money pit :biggrin: but I love it.

Correction: CARS are a money pit lol. But yes, I love it like you too!

 

[ediddynsx]

Yes yes you are right but it depends on which cars you decide to plunk money on. I dont plan to mod my toyota camry.

by the way I love the 300zx TT my buddy has 3 of them. Post pics of your TT. =)

 

[surferX]

...since I already plunked 30k on the normal mods. (rims, suspension, headers, intake, exhuast, brakes, engine dress up, interior stuff etc etc.)

Hmm...30k...sounds a bit fishy unless all those parts are made of platinum, your rims are diamond studded, and your engine is dressed up in Armani!

On a side note, thanks for posting all of the info on the stroker Eddie, it makes for good reading! :biggrin:

 

[collegeboy]

Hmm...30k...sounds a bit fishy unless all those parts are made of platinum, your rims are diamond studded, and your engine is dressed up in Armani!

On a side note, thanks for posting all of the info on the stroker Eddie, it makes for good reading! :biggrin:

i dunno stuff can add up quick if you are picky with just 300ZXs and I've noticed so far that NSX parts are quite a bit more money.

 

[ediddynsx]

Hmm...30k...sounds a bit fishy unless all those parts are made of platinum, your rims are diamond studded, and your engine is dressed up in Armani!

On a side note, thanks for posting all of the info on the stroker Eddie, it makes for good reading! :biggrin:

Hahaha! Yes my rims should have diamonds for what I paid for them. But thats what I get for wanting to be original. If you add up all the parts I have bought including labor it is around that much. It does add up quickly and then you are like



But I am nothing compared to some of these other guys out there that spend a bajillion dollars on their nsx's :biggrin: ie (SOS guys, Factor X guys, Jon Martin, Mark Johnson, Alex Vizcarra (Gruppe M USA),Gerry Johnson, Armando from Miami, and a few other guys who have various FI applications. Not to mention anyone else who was the guinea pig in trying parts that blew up their motor over and over again. :redface:

Add those guys up and we have the mega million jackpot! :biggrin:

 

[TTony]

i dunno stuff can add up quick if you are picky with just 300ZXs and I've noticed so far that NSX parts are quite a bit more money.

No kidding, equivalent NSX items (i.e. exhaust, intake, ECU, etc.) typically cost 300% more than a 300zx items.

Oh yea, the NSX is typically 300% the cost of an equivalent 300zx also. :biggrin:

 

[willabeest]

We recommend customers install headers as well as the exhaust with the engine. Besides injectors, nothing else is required with the engine.

Just as it is with a supercharger, additional components will only help to maximize performance and durability but are not required and can be added along the way.

We've posted "out the door" pricing here:
http://www.scienceofspeed.com/produ.../custom_engine_program/custom_engine_program/

cheers,
-- Chris

this is cool but will it meet california emissions?

 

[DDozier]

We recommend customers install headers as well as the exhaust with the engine. Besides injectors, nothing else is required with the engine.

Just as it is with a supercharger, additional components will only help to maximize performance and durability but are not required and can be added along the way.

We've posted "out the door" pricing here:
http://www.scienceofspeed.com/produ.../custom_engine_program/custom_engine_program/

cheers,
-- Chris

Maybe not the place to ask but, does the stroked motors still maintain the 8k RPM redline or are they reduced to deal with the larger rotating mass. Have you guys got any engine dyno results for any of these kits yet.

thanks

Dave

 

[Bob Kenney]

The outfits I have questioned have all said the 8000 RPM will not be a problem. If the motor is to be blown, the displacement will drop to 3.5 to 3.6 for greater cylinder wall thickness and rods will have to be upgraded. Comptech has built stoker engines for endurance racing that turn 8K + and holdup well for the 24 hour races.