Tyeler18 said:

For starters your 1g ported head definitely isn't helping anything. Not sure why you're running that one when the 2g head is actually better for a lower HP build such as yours.

Next would be higher compression pistons, 9.0:1 pistons would be a good increase, however, something in the 10+ would be much better if you have race gas or E85 local.

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RocCitySlayer said:

Yea the hx35 is definitely a bad ass turbo.. iv been messing around with down shifting and it seems to be alittle better at picking up speed

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urbansmoker1 said:

its all spool with a bigger turbo.. and there isnt really much you can do about it unless you run compound turbo (quick spooling a smaller turbo '16g' into a bigger turbo 'hx35') but that is very costly... and like i said nitrous will get you there also.. but i personally will never ever run the stuff... when im in my turbo lag RPM range i dont even care too much because while i'm cruising i get pretty good gas mileage for the most part. if your crusing in 5th at 60mph downshift to 3rd and go like a bat outa hell... shit or even 4th will spool pretty quick.. 3rd and 4th for me are ripping the nuts out of my tranny pretty much and i havent even ran over 23 psi yet.

what is your boost controller set to? you will get a quicker spool with a bigger turbo the higher the boost is set at IMHO but you of course have to tune for the higher boost.. the hx35 from what i have read doesnt even wake up until 25psi... which is very similar to my SCM6152

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urbansmoker1 said:

your BC 272 cams are top end cams... and will degridate your lower end power band... i have them also, but it hits like a banchee after 5k with my turbo.]

+1 on the BC cams, they work great but man will they hurt you in the bottom end (think anything from about 38oorpm and lower) couple that with the HX35 and you got a recipe for all top end power (45-4800rpm +) and a less than exciting low-midrange pull. You can try a few things here without going to the extreame of having to revamp your entire set up.

1. Get another hot housing for your turbo with a smaller a/r.

This will help with response but you will sacrifice some of the top end power as a result....just keep in mind that your adding back pressure to the set up when you move to a smaller hot housing but the trade off may actually be desirable if it gets rid of the lag time between shifts or on down shifts

2. Try bumping your timing off boost to gain some torque.

As with most cams when you increase lift and duration you can usually add 2-3 degrees of timing to compensate for the extended period of time the valve is open, doing this will produce a little more pressure when the mixture is lit off prior to top dead center which in turn will produce a slight bump in torque, just remember you want to keep it off boost and start yanking the ignition timing back to where it is now on boost at w.o.t. Not doing so can result in detonation and as we all know that can cost you some money. You'll also want to consider going to a spark plug at least 1 heat range cooler to compensate for the additional heat and possibly a little more fuel to boot. in short- retune your ride.

3. Start re-assessing your power to response requirements and consider a turbo which will cover a little more of both areas of your power requirements without being to far to one side or the other.

For example You may find that if your car makes 450whp on an HX35 but the response is a little lacking, swapping to a GT2871R could make your car feel a lot faster while still managing to full fill 2/3 the over all power you had previously (400), remember this purely an example. Sometimes how much power you make under the curve goes a lot further than how much power you make over all.

4. Adding adjustable cam gears.

Cam timing in relation to the piston position in the short block can also help tremendously with tailoring the cars torque delivery this is also pretty cheap

5. Change the internal specification of your internals to better suit your low end and mid range requirements I.E. stroker kits, bump in compression as suggested earlier, assemetric cam profiles, or combinations of all three costly to say the least.


Hope this helps out...
William-

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Tiki2777 said:

Better spool would be ahieved with the 8 blade hx35, just sayin.

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