and still make less torque than a civic

 

I don't feel any torque loss at all with my tune probably due to the Nismo VTC units (that's the beauty of it!)... it avoids the torque loss down low that normally comes with a set of high duration/lift cams by offering more cam angels... and I am taking advantage of these cam gears by using MoTeC which has the ability to control camshaft timings too... There is also a bit of torque gain by using the higher compression pistons too, so overall, the torque is similar or slightly better than the stock engine...

Below 4K rpm I only get a bit of power gain than the stock engine and it wakes up after 4.5K rpm.. that's where all the power start to jump in...

I just double checked with my latest dyno curve, the max. power was at around 7200rpm, and it starts to drop gradually to 8000rpm (the diff. between 7200rpm and 8000rpm is around 6HP or so)... so it is pretty flat... and the tuner told me that the Engine Speed on the dyno curves are derived from the speed and he reckons that the max. power is around 7600rpm...

cheers,

richie

 

"makes less HP than a civic"

 

reving a TT engine over 7500 with the stock crankshaft is very risky imo. You need to knife edge, remove counter weights and rebalance the crankshaft for anything over 7500 if you wish to stay on the safe side.

 

mistaboosta is correct.... I got the engine blue printed and balanced the entire bottom end (took them a couple of weeks) and modifying the oil routes too at the bottom end to make sure that there is enough oil going through when revving that high... That's also why I am using a heavier fluidampr engine damper too...

cheers,

richie

 

If you have a built NA motor like Z350Lover than you shouldnt feel a loss but more of a gain. On the Rev Up engines its a different story. My rev limiter has been set to 7500rpm but I can feel a slight power loss as the rpm gets higher, probably due to the MREV but had I kept the Rev Up lower collector, it would be a consistant power band without a loss or a gain.

 

MD spacer chokes the engine at 7k and up? I just installed one and i couldnt be more please out of all the other mods i have done. But then again, im redlining at stock 6.5

 

doesnt the s2000 have 157 torque?

 

The engine in my 2004 T2 car revs to 7800rpm without a problem. Only modifications are blueprint and balance of the valvetrain, heavy duty valve springs, ARP rod bolts, Rev-up camshafts & lower plenum and a Technosquare reflash. We could rev it to 8k without a problem but decided to be a little conservative. Technosquare dynoed a 2006 to 8k without any problems on the dyno, long-term I dont know...

If you want to do it as inexpensively as possible, you can skip the blueprint and balance, I dont think it is necessary to rev above 7k, but it does give you more hp and better flow in the heads. Since we had the heads off it did not make sense to not have it done.

 

Richie, if you don't mind me asking..what kind of power are you making with the N/A mods you have?

Thanks,
RE

 

i shift at 7300-7400. you can look at my sig for the details. mine was also done by ted at scott performance. i do notice a little bit of a torque loss down low, but come 4500, i'm gone......

 

It is making around 347HP AT THE ENGINE (still a 3.5L)!!! Based on the 19% drivetrain loss that we experience on the loaded dyno downunder!

cheers,

richie

 

19% drive train loss? Almost as much as an auto =(

 

Good thread.

I'm sub for future info

 

I disagree with this one, knife edging would not be reliable on a daily, too much metal is removed and the it would be very unbalanced.

The stock design of our crank is sound, no major modifications are required except to attempt to increase its strength through cryo or heat treating and a dynamic balance it with your new forged internals. Look at the Nismo competition crank, it is designed exactly the same as our stock one and it is designed for high rpm track use. This tells us the design is good, and to move away from it would be the wrong thing to do. The only difference is that it is made from a stronger material, hence the need to attempt to strengthen our crank.

Performance Motorsport use the stock crank in their drag car with similar modifications mentioned above and the they rev the car to ~12,000rpm with TT and ~1900rwhp, for about 40-50 runs before a rebuild.

 

I'm with mchapman above, knife edging is going to make the crank assembly lose dynamic balance. You do it to a drag car, but not a track car or daily driver.

Mike

 

I think Performance actually swapped to using the NISMO cranks now if I recall. Pricey for sure, but they are an amazing piece

 

Hey Richie Any vids of your car in action?