hi guys ! i just installed my greddy turbo kit on my 94 civic with greddy intercooler. just wondering if anyone out there have ever dyno his civic with the same set up? greddy said it should dyno around 170 fwhp but i don;t know till i dyno mine. also after i install the intercooler i notice above 5k boost start to drop off, anyone ever have this problem? or it's normal due to the intercooler pressure drop off?

 

I want to see a dyno too.

 

greddy kits dyno @ stock 6psi around 140-160 measly whp.
DRAG Dyno's at 180-200 whp @7psi

 

That is in large part due to the larger turbo used. Greddy makes a great bolt on kit, but their turbo craps out up top where the bigger turbos really are crankin out hard.

 

yeah i agree which you that greddy turbo { td04 - 15g}have NO TOP END!! it's got the great instant boost but after 5000 rpm it's really weak, maybe that's why my boost start to drop on tip end. so what the most boost i can run with stock SOHC motor?

 

w/ proper tuning...I would not exceed 10psi @ the track, and 8psi daily.
the sohc rods are VERY small.

 

so what you do think i can run the max boost on stock motor?

 

Like dragII said- 10 at the track, 8 on the street.

My car dynoe'd at 152 hp and 135 tq at 5.5 psi with the greddy kit. At 7.5 psi it was 165 hp and 145 tq.

As for your boost falling off above 5000 rpm, its because of the intercooler, and the fact that you have your actuator hose plugged in to the port on the turbo housing. You need to plug that port and run the hose off of the actuator to a source AFTER the intercooler, like where your BOV or FPR is hooked up. My bro had the same problem and that fixed it, it now holds boost all the way to redline. And the power drop-off isn't so bad once you turn the boost up a little.

 

so how much boost you brother running now? i turn uo the boost to about 8 psi and on top end it'll drop to about 5.5 psi. should i leave it alone since i 'm running stock pump and injectors? or do like you said plug the turbo port and connect the wastegate to another source? like the bov on the intercooler piping? is that what you mean?

 

My bro is running 9 psi now. He's always had the walbro 255 lph intank pump on it, I wouldn't run more than 6 or maybe 7 psi with the stock fuel pump. Get a new fuel pump asap. And what I mean to fix your problem is this-

1. plug the port on the turbo
2. get a longer piece of hose to replace the short stock one
3. splice one end of the hose into the vacuum line going to your BOV, or the one going to your FPR
4. plug the other end into the actuator on the turbo
5. Done! It will now hold the set boost level all the way to redline.

 

i have a friend that dyno'd 300hp on a greddy kit with 15psi of boost on a built JG d16z6!

liam

 

On a stock, unfortified setup like yours, there are several things to keep in mind. First of all, the stock rods are an immediate handicap. This is inherent in almost all Honda engines, the rods are the weakest link - especially those on SOHC engines like your D16Z.

Secondly, careful attention must be paid to the cylinder temperatures. If cylinder temperatures become too high, detonation will occur. The amount of fuel supplied also contributes to temperature levels. Generally, a rich fuel condition is cooler than a lean fuel condition. Fuel delivery can be improved quickly and easily through the simple additions things like a fuel riser or upgraded injectors. I strongly recommend that you upgrade the fuel system if you are considering raising the boost.