And if it was supercharged, would it make it worse for the car? is there any power to be made up there?

 

if its stock, then just get a new motor

first the valve train is not designed to take more then 8700rpm without bind or premature wear
cams + the SC usually run out of steam by 8000rpm, so its pointless

at that high rpm even B16Bs can be destroyed if no proper build up was done

9000rpm is possible without a major dent in the wallet but the motor will need to be kept in perfect sync., fuel, timing all has to be perfect

RPM = ruins peoples motors





[Modified by eg6ajk, 9:05 PM 5/1/2002]

 

if there was head work done to the car, like toda cams and toda valve springs and such...

 

a bullet proof block and fully upgraded valvetrain would be recommended..i havent really seen any off the shelf cams that make power that high.

 

the valve train is more of a problem than the block, 9500 is good for extreme cams like Skunk2 Stage 3's, Toda Spec C's, etc. mostly to keep in the power band after a shift. C-Speed did B16A PR3 pistons in a B18C1 (11.3:1 CR) with Portflow inner/ITR outter valve springs and portflow Ti retainers (about 320 before shipping) and said it was good to 10K rpms. The Vortech supercharger would probably make power up that high, but not the JRSC. In that case, you would want lower CR pistons, but the same valvetrain upgrades, VERY good fuel tuning, and some praying to your respective religion. HTH.


-Andrew

 

vavle train is a definete and a better bottom end

 

Higher RPM = more stress on parts

So to alleviate stress on parts you will need to get lighter yet stronger bottom end components - lightweight cold forged rods and lightweight pistons, and good crank bearings.

The top end will require high performance cams, matched springs, retainers, lighter & stronger valves, and P&P head work.

That's the minimum work neccessary to raise the rpm significantly.

 

ITR rods and CTR or ITR pistons will go safely to 9.5K.

-Andrew

 

yea....you do that and rev up to 9.5k and tell me what happens. information like what you are saying can seriously damage peoples motors.

 

I'm not saying that is all you need, but I know it is possible. I've seen it.

-Andrew

 

possible yeah, i have a friend who takes hi ls-vtec to 9500 on the STOCK LS RODS! hes at 12.1 compression but i'm waiting to see for how long

 

im assuming this is with new cams,valvesprings and retainers right? even so....he should switch out those rods asap. the stock LS components were not build to rev up that high.

 

believe it or not, its on gsr valvetrain and b17 cams

 

i believe it...but i'll also believe when his valves start bending and he sends a piston through the block

 

i guess he'll find out

 

....Driving on the freeway at 80 in 5th gear, seeing a Supra and mis-shifting into 2nd gear. Ouch.....

 

you can count how many months that motor has to live on one hand if he's really running it 9500 every day. ls/vtec bore stroke

Edit: its a good motor but not balanced, lubricated, supported or has the b/s to live that high w/o major work that basically mimics a b18c and such


[Modified by tonydatyga, 9:43 PM 5/5/2002]

 

i rev to 9500 with my J3s. Shift at 9, but can rev to 9.5. I have portflow / ITR combo valve springs. Stock retainers

 

You should do at least Type R vavles, but I'd go with something like the new S2 or Ferra valves.

-Andrew