Custom Engine Program Details Released from ScienceofSpeed (3.3L - 3.8L engines)

[ScienceofSpeed]

http://www.scienceofspeed.com/produ.../custom_engine_program/custom_engine_program/

<img border="0" src="http://www.scienceofspeed.com/products/engine%5Fperformance%5Fproducts/NSX/ScienceofSpeed/custom%5Fengine%5Fprogram/custom%5Fengine%5Fprogram/motorbuilding-200.jpg" align="right">Due to the release of our new NSX Billet Crankshaft Stroker Package, we have had many questions on the costs to fully build a custom engine from start to finish using these components.

As we have recently completed several of these custom engine builds, we have compiled the costs for every component from minute gasket to billet crankshaft.

We have created a new website to display our custom engine packages from 3.3L displacement to 3.8L displacement. We offer pricing in two formats:
• engine component package: package including performance components your engine builder will need to build this package
• turn-key assembled package: complete turn-key engine built by ScienceofSpeed using your supplied engine either removed by or shipped to ScienceofSpeed. Includes labor, machining costs, every new gasket, seal, bearing, etc. for a like-new engine along with the various high performance pistons, camshafts, billet crankshaft, etc.

Due to the complexity of an engine build, we've attempted to detail as clearly as possible the tasks and components these engine builds entail.

If you have any questions, please do not hesitate to contact us.

Cheers,
-- Chris

 

[len3.8]

With the engines that you have produced, were you able to come up with a gauranteed power gain for each of these packages?

Will the factory ECU work fine with these applications or are you required to use AEM/HKS/Electromotive or the like?

 

[ScienceofSpeed]

hi Len --

Good questions.

Power figures for the stroker engines will start to make their way on to NSXPrime once the cars are broken in and dynoed. So far, I've been impressed with the 3.8L I have been driving. Ever wonder what it feels like to have a V8 powered NSX? The 3.3L packages have been dynoed with stock induction (60 hp gain) and individual throttle body induction (80 hp gain). These are on our website.

The engines do not require stand alone engine management, however, they greatly benefit in performance and reliability with a well tuned EMS.

Cheers,
-- Chris

 

[Diveboy]

Are the engines started and run some period of time before being shipped back to the customer to make sure everything is ok? Also what about the tuning if we are at a different atitude then you are at. I am basically 1000 ft above sea level. I know it affected my brothers car when he lived in Colorado spring. They have to retune the car for that attitude.

 

[ScienceofSpeed]

A standard engine break-in procedure will need to be followed once installed. The details of this are provided with the engine.

02 sensors allow the engine management unit (stand alone or factory) to compensate for air density variences due to altitude. Nothing is made different in the engine.

Cheers,
-- Chris

 

[Diveboy]

Hey Chris

If a user send you their engine to be rebuilt. After you have rebuilt the engines, do you start them up to make sure there is nothing mechanically is wrong before you send them back. Or will the owner not know anything until the first time they turn the key? Just trying to avoid the whole sending an engine back and forth. A starting of the engine before it leaves the shop could save a lot of problems down the road. I have seen number of performance engine shops run the engine for 1 hour before sending them out.

Also do you have any recommendation that should be done along with getting the engine rebuilt. Like a higher volume fuel pump, bigger injectors, a clutch or pressure plate other then the standard equipment. I know you have talk about a different computer for the car.

 

[ScienceofSpeed]

The engine is turned over before shipping. Since each motor is blue printed during assembly (tolerances on bearings, rings, etc.) there's nothing to inspect post-assembly. As far as being broken in, no, the motor is not broken in out of a car. This should be performed once installed. Out of car break-in would require an engine dyno with a setup to provide coolant and engine management. This is not necessary.

Regarding other accessories, this depends on the application of the engine. In general, larger injectors will be required. The customer should verify the health and condition of the fuel system. The stock fuel pump is adequate. I highly recommend stand-alone engine management; however, it is not required for a naturally aspirated application.

Regards,
-- Chris

Hey Chris

If a user send you their engine to be rebuilt. After you have rebuilt the engines, do you start them up to make sure there is nothing mechanically is wrong before you send them back. Or will the owner not know anything until the first time they turn the key? Just trying to avoid the whole sending an engine back and forth. A starting of the engine before it leaves the shop could save a lot of problems down the road. I have seen number of performance engine shops run the engine for 1 hour before sending them out.

Also do you have any recommendation that should be done along with getting the engine rebuilt. Like a higher volume fuel pump, bigger injectors, a clutch or pressure plate other then the standard equipment. I know you have talk about a different computer for the car.

 

[Alittleboost]

Let me get this straight chris.

If I wanted to purchase your 3.3 liter, I would have to buy the components listed on the web-site, then take it to my engine shop of choice to match bore the chambers to match the piston set, then have the heads worked on correct?...if I didn't want to get the turn-key option. This package also comes with Stage 2 cams?


I'm assuming the cams are re-grined cams?...if so you have a more agressive set of cams not going with the like toda/mugen/etc.....or can you grind them to be more agressive for us?

 

[garthed]

Will that 3.3 and 3.8 motor pass California Smog?

 

[ScienceofSpeed]

Yes, the components can be purchased for your shop to use or you may have use build the engine for you.

The cam profiles are limited by the NSX valve geometry. Duration/lift is limited by valve to valve clearance, as well as piston clearance. I have not seen any of the other aftermarket cams that are any more "aggressive" than the profiles we use.

Emissions output is dictated by the tune job. With a proper tune, the engines should produce similar emissions to a factory powerplant.

Cheers,
-- Chris

 

[White92]

I think this is an awesome deal. You're offering a 3.6/3.8 turnkey engine for $15,445. Just the crankshaft from Toda is $9k! And it's "only" a 3.5. Good job guys! Way to make some great stuff and keep the prices realistic! :smile:

 

[goldNSX]

Is the larger stoke capable of reving 8000 rpm and what is the maximum piston velocity?

 

[ScienceofSpeed]

Yes, the engine maintains the factory rev speed due to the piston design used which reduces rotating mass by nearly 100 grams and maintains a high rod ratio.

The piston speed for any of the 88mm stroked engines at 8000 RPM is 77 ft/sec.

In comparison:
Integra GS-R @ 7200: 78.1 ft/sec
factory NSX engine @ 8000: 68.2 ft/sec
S2000 2.0L @ 9000 RPM: 82.8 ft/sec

Cheers,
-- Chris

 

[clarknm]

I know it seems insignificant, but how's the gas mileage on these? I'm also wondering why anyone would get the 3.6 over the 3.8? Sorry if these are newbish questions

 

[PoohBEAR]

good question actually. Also, does turnkey means that the engine will be strip, clean, and put back together? so at the end of the day, the engine will be back to drivable as was delivered? what is the turn around time?

I know it seems insignificant, but how's the gas mileage on these? I'm also wondering why anyone would get the 3.6 over the 3.8? Sorry if these are newbish questions